阅读说明：本技术 一种抗磨液压油及其生产工艺 (Antiwear hydraulic oil and production process thereof ) 是由 王哲 于 2021-08-12 设计创作，主要内容包括：本申请涉及液压油技术领域,具体公开了一种抗磨液压油及其生产工艺。所述抗磨液压油的配方中包括如下重量份的原料：可降解基础油90-110份,防腐剂1-2份,抗氧化剂1-2份,聚乙二醇2-4份,碱性白土2-4份,所述可降解基础油由植物油和矿物油复配而成。本申请的聚乙二醇和碱性白土具有协同作用,减少了抗磨液压油在使用过程中发生降解的可能,有助于延长抗磨液压油的使用寿命。(The application relates to the technical field of hydraulic oil, and particularly discloses anti-wear hydraulic oil and a production process thereof. The formula of the antiwear hydraulic oil comprises the following raw materials in parts by weight: 90-110 parts of degradable base oil, 1-2 parts of preservative, 1-2 parts of antioxidant, 2-4 parts of polyethylene glycol and 2-4 parts of alkaline clay, wherein the degradable base oil is prepared by compounding vegetable oil and mineral oil. The polyethylene glycol and the alkaline clay have a synergistic effect, so that the possibility of degradation of the anti-wear hydraulic oil in the using process is reduced, and the service life of the anti-wear hydraulic oil is prolonged.)

1. The antiwear hydraulic oil is characterized in that a formula of the antiwear hydraulic oil comprises the following raw materials in parts by weight: 90-110 parts of degradable base oil, 1-2 parts of preservative, 1-2 parts of antioxidant, 2-4 parts of polyethylene glycol and 2-4 parts of alkaline clay, wherein the degradable base oil is prepared by compounding vegetable oil and mineral oil.

2. The anti-wear hydraulic oil of claim 1, wherein the formula of the anti-wear hydraulic oil comprises the following raw materials in parts by weight: 95-105 parts of degradable base oil, 1.3-1.8 parts of preservative, 1.3-1.8 parts of antioxidant, 2.5-3.5 parts of polyethylene glycol and 2.5-3.5 parts of alkaline clay.

3. The antiwear hydraulic oil of claim 1, wherein the degradable base oil is prepared from a mixture of, by weight, 1: (1.2-1.4) vegetable oil and mineral oil.

4. The antiwear hydraulic fluid of claim 1, further comprising 3-6 parts by weight of chitosan in the formulation of the antiwear hydraulic fluid.

5. The antiwear hydraulic fluid of claim 1, wherein the vegetable oil has a phospholipid content of 1.6-2.4%.

6. The antiwear hydraulic oil of claim 1, wherein the antioxidant is selected from nano iron powder.

7. The antiwear hydraulic oil of claim 6, wherein the preservative is sorbic acid.

8. The antiwear hydraulic fluid of claim 6, further comprising 1-2 parts by weight of persulfate in the formulation of the antiwear hydraulic fluid.

9. The antiwear hydraulic fluid of claim 8, further comprising 0.60 to 1.20 parts by weight of glycerol citrate.

10. The process for producing antiwear hydraulic oil according to any one of claims 1 to 9, comprising the steps of:

(1) mixing polyethylene glycol and alkaline clay uniformly, heating at 70-90 deg.C for 1.5-2.5h, cooling, and pulverizing to obtain mixture 1;

(2) and (3) putting the mixture 1, the antioxidant and the preservative into the degradable base oil, and uniformly stirring to obtain the anti-wear hydraulic oil.

Technical Field

The application relates to the technical field of hydraulic oil, in particular to antiwear hydraulic oil and a production process thereof.

Background

The hydraulic oil is a hydraulic medium used by a hydraulic system utilizing hydraulic pressure energy, and the traditional hydraulic oil is compounded by mineral oil. Mineral oil is difficult to degrade in nature and easy to cause environmental pollution, and in order to meet the requirement of environmental protection, the sound for developing degradable hydraulic oil is higher and higher in recent years.

Chinese patent with publication number CN104845711B discloses an environment-friendly anti-wear hydraulic oil, which comprises a component A, a component B and a component C, wherein the component A comprises a component A, B, and the components comprise the following components: a component A: the component A comprises: linseed oil, castor oil, sunflower oil; and B component: sorbitan monopalmitate, triglyceride; b, component B: nano silicon boride, polyalkylene glycol, glycerol, isoparaffin, sulfurized fatty acid ester; c, component C: trimethylolpropane ester, polyacrylamide, calcium sulfonate and paraffin. Because the linseed oil, the castor oil and the sunflower oil belong to the vegetable oil, the natural degradation speed of the vegetable oil is high, and the microorganisms can accelerate the degradation of the vegetable oil, so that the prepared environment-friendly antiwear hydraulic oil has good degradability.

In view of the above related technologies, the inventor believes that, although the environment-friendly antiwear hydraulic oil in the related technologies has good degradability, in the using process, the vegetable oil component in the environment-friendly antiwear hydraulic oil is easily decomposed by microorganisms, which affects the service life of the environment-friendly antiwear hydraulic oil.

Disclosure of Invention

In the related technology, in the using process, the vegetable oil component in the environment-friendly anti-wear hydraulic oil is easily degraded by microorganisms, and the service life of the environment-friendly anti-wear hydraulic oil is influenced. In order to overcome the defect, the application provides an anti-wear hydraulic oil and a production process thereof.

In a first aspect, the application provides an anti-wear hydraulic oil, which adopts the following technical scheme:

the antiwear hydraulic oil is prepared from the following raw materials in parts by weight: 90-110 parts of degradable base oil, 1-2 parts of preservative, 1-2 parts of antioxidant, 2-4 parts of polyethylene glycol and 2-4 parts of alkaline clay, wherein the degradable base oil is prepared by compounding vegetable oil and mineral oil.

By adopting the technical scheme, compared with the related technology, the compound product of the mineral oil and the vegetable oil is used as the base oil, and the polyethylene glycol and the alkaline clay are added into the base oil. In the antiwear hydraulic oil, the polyethylene glycol is associated with the alkaline clay through hydrogen bonds, so that a hydrophilic film is formed on the surface of the alkaline clay. The hydrophilic membrane can capture moisture mixed in the anti-wear hydraulic oil, the alkaline argil absorbs the moisture captured by the hydrophilic membrane, so that microorganisms are difficult to obtain enough moisture in the hydraulic oil, and alkaline substances and mineral oil in the alkaline argil have an inhibiting effect on the growth of the microorganisms. Under the combined action of the mineral oil, the polyethylene glycol and the alkaline clay, microorganisms are not easy to breed in the anti-wear hydraulic oil, so that the possibility of degradation of the anti-wear hydraulic oil in the using process is reduced, and the service life of the anti-wear hydraulic oil is prolonged.

After the anti-wear hydraulic oil permeates into soil, alkaline substances in the alkaline clay are absorbed by the soil, and microorganisms in the soil decompose plant oil components in the degradable base oil, so that the natural degradation of the anti-wear hydraulic oil is realized.

Preferably, the antiwear hydraulic oil is prepared from the following raw materials in parts by weight: 95-105 parts of degradable base oil, 1.3-1.8 parts of preservative, 1.3-1.8 parts of antioxidant, 2.5-3.5 parts of polyethylene glycol and 2.5-3.5 parts of alkaline clay.

By adopting the technical scheme, the proportion of the anti-wear hydraulic oil is optimized, and the service life of the anti-wear hydraulic oil is further prolonged.

Preferably, the degradable base oil is prepared from the following components in a weight ratio of 1: (1.1-1.5) vegetable oil and mineral oil.

By adopting the technical scheme, when the weight ratio of the vegetable oil to the mineral oil is too small, the degradability of the anti-wear hydraulic oil is poor, but the service life is long; when the weight ratio of the vegetable oil to the mineral oil is too large, the anti-wear hydraulic oil has better degradability but shorter service life. When the weight ratio of the vegetable oil to the mineral oil is 1: (1.2-1.4), the service life of the antiwear hydraulic oil is longer, and the degradability is better.

Preferably, the formula of the anti-wear hydraulic oil further comprises 3-6 parts by weight of chitosan.

By adopting the technical scheme, the chitosan contains a large amount of hydroxyl, so that the chitosan is easy to compound with a hydrophilic film on the surface of the alkaline clay. Amino contained in the chitosan can react with free fatty acid in the degradable base oil to generate fatty acid salt, so that the fixation of the free fatty acid is realized, and the possibility of the deterioration of the anti-wear hydraulic oil caused by excessive accumulation of the fatty acid is reduced.

Preferably, the content of phospholipids in the vegetable oil is 1.6-2.4%.

By adopting the technical scheme, the phospholipid in the vegetable oil has both hydrophilic groups and hydrophobic groups, and the hydrophilic groups of the phospholipid can be associated with the hydrophilic membrane on the surface of the alkaline clay, so that the agglomeration of the alkaline clay is reduced, the water absorption effect of the alkaline clay is improved, and the service life of the anti-wear hydraulic oil is prolonged. After the anti-wear hydraulic oil is discharged into soil, the phospholipid can provide phosphorus elements for microorganisms in the soil, so that the growth of the microorganisms can be promoted, and the natural degradation speed of the anti-wear hydraulic oil can be increased.

When the content of phospholipids in the vegetable oil is too low, the effect of promoting the growth of microorganisms by the phospholipids is insufficient, and the effect of improving the water absorption of the alkaline clay is poor. When the content of phospholipid in the vegetable oil is too high, the phospholipid has too strong effect of promoting the growth of microorganisms, and the service life of the anti-wear hydraulic oil is influenced. When the content of the phospholipid in the vegetable oil is 1.6-2.4%, the service life of the anti-wear hydraulic oil is longer.

Preferably, the antioxidant is selected from nano iron powder.

By adopting the technical scheme, in the process of using the anti-wear hydraulic oil, the nano iron powder can react with the water and oxygen in the anti-wear hydraulic oil to generate iron oxide, so that the oxygen content and the water content in the anti-wear hydraulic oil are reduced, the reproduction of microorganisms in the anti-wear hydraulic oil is inhibited, and the service life of the anti-wear hydraulic oil is prolonged. After the anti-wear hydraulic oil is discharged into soil, the ferric iron in the iron oxide is reduced into ferrous iron by humic acid in the soil, and the ferrous iron and hydroxyl radicals generated when the plant oil is decomposed by microorganisms jointly oxidize the mineral oil, so that the cracking of the mineral oil is promoted, and the natural degradation speed of the anti-wear hydraulic oil is improved.

Preferably, sorbic acid is selected as the preservative.

By adopting the technical scheme, in the process of using the anti-wear hydraulic oil, the sorbic acid can inhibit the growth of microorganisms, and is beneficial to prolonging the service life of the anti-wear hydraulic oil. After the anti-wear hydraulic oil is discharged into soil, sorbic acid is jointly oxidized by ferrous iron and hydroxyl free radicals, and the inhibition effect on the growth of microorganisms is lost, so that the natural degradation speed of the anti-wear hydraulic oil is not easily influenced.

Preferably, the formula of the anti-wear hydraulic oil also comprises 1-2 parts by weight of persulfate.

By adopting the technical scheme, after the anti-wear hydraulic oil is discharged into the soil, the humic acid in the soil activates the persulfate, the activated persulfate generates sulfate radicals when ionized, and the sulfate radicals can promote the decomposition of the alkaline clay and accelerate the migration rate of alkaline substances in the alkaline clay to the soil, so that the possibility of inhibiting the growth of soil microorganisms by the alkaline substances is reduced, and the degradation rate of the anti-wear hydraulic oil is accelerated.

Preferably, the formula of the anti-wear hydraulic oil also comprises 0.60-1.20 parts by weight of glycerol citrate.

By adopting the technical scheme, after the anti-wear hydraulic oil is discharged into soil, the citric acid glyceride can form a chelate with ferrous iron and ferric iron on the surface of the nano iron powder, so that the loss speed of the ferrous iron and the ferric iron in the anti-wear hydraulic oil is limited, and the degradation speed of the anti-wear hydraulic oil is accelerated.

In a second aspect, the application provides a production process of antiwear hydraulic oil, which adopts the following technical scheme:

the production process of the anti-wear hydraulic oil is characterized by comprising the following steps of:

(1) mixing polyethylene glycol and alkaline clay uniformly, heating at 70-90 deg.C for 1.5-2.5h, cooling, and pulverizing to obtain mixture 1;

(2) and (3) putting the mixture 1, the antioxidant and the preservative into the degradable base oil, and uniformly stirring to obtain the anti-wear hydraulic oil.

By adopting the technical scheme, the wear-resistant hydraulic oil is prepared by taking polyethylene glycol, alkaline clay, an antioxidant, a preservative and degradable base oil as raw materials.

In summary, the present application has the following beneficial effects:

1. in the process of using the anti-wear hydraulic oil, the polyethylene glycol and the alkaline clay jointly absorb moisture in the anti-wear hydraulic oil, so that microorganisms cannot obtain enough moisture from the anti-wear hydraulic oil, alkaline substances and mineral oil in the alkaline clay have an inhibition effect on the growth of the microorganisms, and the microorganisms are difficult to grow and reproduce in the anti-wear hydraulic oil under the joint action of the polyethylene glycol, the alkaline clay and the mineral oil, so that the service life of the anti-wear hydraulic oil is prolonged. After the anti-wear hydraulic oil is discharged into soil, alkaline substances in the alkaline clay are absorbed by the soil, and microorganisms in the soil degrade plant oil components in the anti-wear hydraulic oil.

2. In the application, nanometer iron powder is preferably used as an antioxidant, and the nanometer iron powder can absorb moisture and oxygen in the anti-wear hydraulic oil, inhibit the growth and reproduction of microorganisms and generate ferric oxide on the surface of the nanometer iron powder. After the anti-wear hydraulic oil is discharged into soil, the ferric oxide on the surface of the nano iron powder is reduced into ferrous iron by humic acid in the soil, the ferrous iron and hydroxyl radicals generated when the plant oil is decomposed by microorganisms jointly oxidize the mineral oil, so that the cracking of the mineral oil is promoted, and the natural degradation speed of the anti-wear hydraulic oil is improved.

3. According to the method, polyethylene glycol, alkaline clay, an antioxidant, a preservative and degradable base oil are used as raw materials to prepare the anti-wear hydraulic oil.

Detailed Description

The present application will be described in further detail with reference to examples.

Examples

The raw materials used in the examples of the present application can be commercially available, wherein 2.2-dibromo-3-cyanoacetamide is purchased from Beijing environmental century chemical technology Co., Ltd, ascorbic acid is purchased from Tianjin optical recovery technology development Co., Ltd, 500N base oil is purchased from Zibo Xin Ji rubber additive Co., Ltd, soybean oil is selected from industrial grade soybean oil produced by Yihai three-way technology Co., Ltd, polyethylene glycol is selected from industrial grade polyethylene glycol sold by Jinan Hui Jinchuan commercial trade Co., Ltd, alkaline clay is selected from industrial grade alkaline clay produced by Jinan Beibei chemical technology Co., Ltd, chitosan is selected from industrial grade chitosan produced by Shandong national chemical technology Co., Ltd, nano iron powder is selected from nano high-purity superfine iron powder (first grade) produced by Ninglong mineral processing factory in Shou county, sorbic acid is selected from food grade sorbic acid produced by Shandong Aicai biological technology Co., Ltd, sodium persulfate is selected from industrial-grade sodium persulfate (analytically pure) produced by Shandong ZongRui chemical Co., Ltd, and citric acid glyceride is purchased from Hubei Xingheng Hengji scientific and technological Co., Ltd.

Examples 1 to 5

The following description will be given by taking example 1 as an example.

Example 1

The anti-wear hydraulic oil of example 1 was prepared according to the following steps:

(1) uniformly mixing polyethylene glycol and alkaline clay, heating at 80 ℃ for 2h, cooling, crushing, and sieving with a 200-mesh sieve to obtain a mixture 1;

(2) and (3) putting the mixture 1, the antioxidant and the preservative into the degradable base oil, and uniformly stirring to obtain the anti-wear hydraulic oil. Wherein the degradable base oil is prepared from vegetable oil and mineral oil according to the weight ratio of 1: 1.1, soybean oil is selected as the vegetable oil, the content of phospholipid in the soybean oil is 1.2 percent, and 500N base oil is selected as the mineral oil; the preservative is 2, 2-dibromo-3-cyanoacetamide, and the antioxidant is isoascorbic acid.

As shown in Table 1, examples 1 to 5 differ mainly in the ratio of raw materials

TABLE 1

Example 6

The present example differs from example 3 in that the weight ratio of vegetable oil to mineral oil in the degradable base oil is 1: 1.2. as shown in table 2, example 3 differs from examples 6-9 mainly in the weight ratio of vegetable oil to mineral oil in the degradable base oil.

TABLE 2

Example 10

This example differs from example 7 in that the anti-wear hydraulic fluid formulation also includes 3kg of chitosan, which was co-blended with the degradable base oil in step (2). As shown in Table 3, examples 10 to 13 differ mainly in the amount of chitosan used.

TABLE 3

Sample(s)	Example 10	Example 11	Example 12	Example 13
					Chitosan/kg	3	4	5	6

Example 14

This example differs from example 11 in that the content of phospholipids in the vegetable oil is 1.6%. As shown in Table 4, examples 14 to 17 differ mainly in the content of phospholipids in the vegetable oils.

TABLE 4

Example 18

The difference between this example and example 15 is that nano iron powder is used as the antioxidant.

Example 19

This example differs from example 18 in that sorbic acid is used as the preservative.

Example 20

The difference between the embodiment and the embodiment 19 is that the formula of the anti-wear hydraulic oil further comprises 1.0kg of persulfate, and the persulfate is selected from sodium persulfate which is mixed with the degradable base oil in the step (2). As shown in Table 5, examples 20 to 24 differ mainly in the amount of sodium persulfate used.

TABLE 5

Example 25

This example differs from example 22 in that the antiwear hydraulic fluid formulation also includes 0.6kg of glyceryl citrate, which is co-blended with the degradable base oil in step (2). As shown in Table 6, examples 25 to 29 differ mainly in the amount of glyceryl citrate used.

TABLE 6

Comparative example

Comparative example 1

The antiwear hydraulic oil is prepared according to the production process of the Chinese patent with the publication number of CN 104845711B.

Comparative example 2

This comparative example differs from example 3 in that polyethylene glycol is not included.

Comparative example 3

This comparative example differs from example 3 in that alkaline clay is not included.

Performance detection test method

The preparation method comprises the following steps:

1. preparing activated sludge of sewage treatment plants in Zhenping county of Shaanxi province into bacterial liquid, and carrying out amplification culture on the bacterial liquid until the level of biological viable bacteria in the bacterial liquid is more than 10⁵CFU/ml, spare.

2. Taking yellow brown soil in Fuping county of Shaanxi province, and preparing soil leachate by taking 10kg of yellow brown soil and 50L of distilled water as raw materials for later use.

3. Humus soil sold by Yirun mineral product trade company Limited in Lingshou county is used, and humus soil leachate is prepared by using 10kg of humus soil and 50L of distilled water as raw materials for later use.

The test method comprises the following steps:

test one: placing 30ml of anti-wear hydraulic oil in an open container to simulate the use process of the anti-wear hydraulic oil; in the test process, the air humidity is maintained at 75%, the environmental temperature is 25 ℃, 0.05ml of bacterial liquid is dripped into the anti-wear hydraulic oil when the test is started to simulate the microorganisms in the environment and increase the significance of the test result, the initial decomposition rate of the anti-wear hydraulic oil is tested after 90 days, and the test result is shown in table 7.

And (2) test II: 30ml of soil leachate, 30ml of humus soil leachate, the wear-resistant hydraulic oil which is placed for 90 days in test 1 and 2ml of bacterial liquid are mixed and then placed into an open container, the mixture is stirred at the speed of 80rpm, the culture is carried out under the conditions that the temperature is 25 ℃ and the air humidity is 75% so as to simulate the degradation process of the discarded wear-resistant hydraulic oil, the secondary decomposition rate of the wear-resistant hydraulic oil is tested after 90 days, and the test results are shown in table 7.

In the first and second tests, the method for testing the decomposition rate is referred to ARMY QPL-32073-5-2007 biological-based HYDRAULIC oil HYDRAULIC FLUID, BIOBASED.

TABLE 7

As can be seen by combining examples 1 to 5 and comparative example 1 with Table 7, the primary decomposition rate and the secondary decomposition rate measured in examples 1 to 5 were lower than in comparative example 1, indicating that the antiwear hydraulic fluid of comparative example 1 was more easily degraded during use, and the antiwear hydraulic fluids of examples 1 to 5 had longer service lives than those of comparative example 1. In examples 1 to 5, the primary decomposition rate was the lowest and the secondary degradation rate was the highest in example 3, indicating that the service life was the longest and the degradability was the best in example 3.

As can be seen by combining example 3 with comparative examples 2 to 3 and Table 7, the primary decomposition rate measured in example 3 is lower than that of comparative examples 2 and 3, and the secondary degradation rate measured in example 3 is close to that of comparative examples 2 and 3, indicating that the service life of the antiwear hydraulic oil is short when polyethylene glycol is not used in combination with the alkaline clay.

As can be seen by combining example 3 and examples 6-9 with Table 7, the primary degradation rate and the secondary degradation rate of the antiwear hydraulic fluid decrease as the weight ratio of the vegetable oil to the mineral oil increases, wherein examples 6-8 have a relatively lower primary degradation rate and a relatively higher secondary degradation rate in example 3 and examples 6-9, and thus the antiwear hydraulic fluids of examples 6-8 have both a longer service life and better degradability.

As can be seen by combining example 7, examples 10 to 13 and Table 7, the initial decomposition rates of examples 10 to 13 are all lower than those of example 7, indicating that chitosan contributes to the extension of the service life of the antiwear hydraulic fluid, and that in examples 10 to 13, the service life of the antiwear hydraulic fluid of example 11 is longer.

It can be seen from the combination of examples 11 and 14 to 17 and table 7 that the secondary decomposition rate of the antiwear hydraulic oil is always increased with the increase of the content of phospholipids in the vegetable oil, and when the dosage of the antiwear hydraulic oil exceeds 2.4%, the primary decomposition rate starts to rise again, which indicates that when the content of phospholipids in the vegetable oil is 1.6 to 2.4%, the service life of the antiwear hydraulic oil is longer and the degradability is relatively better.

By combining example 18 and example 15 and table 7, it can be seen that the primary decomposition rate of example 18 is decreased, and the secondary decomposition rate is increased, which indicates that the nano iron powder is more beneficial to prolonging the service life of the antiwear hydraulic oil and improving the degradability of the antiwear hydraulic oil than the isoascorbic acid.

As can be seen by combining example 19 with example 18 and Table 7, the initial decomposition rate of example 19 decreased, indicating that sorbic acid is more useful in extending the service life of antiwear hydraulic fluids than 2.2-dibromo-3-cyanoacetamide.

As can be seen by combining examples 19, 20 to 24 and Table 7, the secondary degradation rates of examples 20 to 24 are all lower than those of example 19, indicating that sodium persulfate contributes to the improvement of the degradability of the antiwear hydraulic fluid, and that the change in the secondary degradation rate is smaller when the amount of sodium persulfate is greater than 1.5kg, indicating that the amount of sodium persulfate used in example 22 is preferable.

As can be seen by combining examples 22 and 25-29, the secondary degradation rates of examples 25-29 are all lower than those of example 22, which shows that the glyceryl citrate is helpful for improving the degradability of the antiwear hydraulic oil, and the change of the secondary degradation rate is smaller when the amount of sodium persulfate is more than 0.90kg, which shows that the amount of the glyceryl citrate in example 27 is better.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.