阅读说明：本技术 一种加氢装置油溶性缓蚀剂及其制备方法和用途 (Hydrogenation device oil-soluble corrosion inhibitor and preparation method and application thereof ) 是由 付海明 叶显孟 傅小川 李兆军 于 2020-07-21 设计创作，主要内容包括：本发明涉及油溶性缓蚀剂技术领域,具体是一种加氢装置油溶性缓蚀剂,其特征在于,包括以下成分：纯乙醇、异丙醇、活性剂、有机缓蚀剂、水、乙二胺和中合剂,一种加氢装置油溶性缓蚀剂及其制备方法,包括以下重量份：纯乙醇：78-80份；异丙醇：10-15份；活性剂：10-15份；有机缓蚀剂：10-15份；水：60-70份；乙二胺：31-45份；中和剂：1-5份。本发明的有益效果：采用纯乙醇、异丙醇、活性剂、有机缓蚀剂水、乙二胺和中和剂最终制备得到的油溶性缓蚀剂,缓蚀效果好,成膜性能好,具有抗高硫化氢腐蚀的作用,不使油品乳化,遇油不产生沉淀,对油品质量无不良影响,采用的中和剂为多乙烯多胺,能够与酸性中的和酸性介质中起到中和作用。(The invention relates to the technical field of oil-soluble corrosion inhibitors, in particular to an oil-soluble corrosion inhibitor for a hydrogenation device, which is characterized by comprising the following components: pure ethanol, isopropanol, an active agent, an organic corrosion inhibitor, water, ethylenediamine and a neutralizing agent, and a hydrogenation device oil-soluble corrosion inhibitor and a preparation method thereof, wherein the preparation method comprises the following steps: pure ethanol: 78-80 parts; isopropyl alcohol: 10-15 parts; active agent(s): 10-15 parts; organic corrosion inhibitor: 10-15 parts; water: 60-70 parts; ethylene diamine: 31-45 parts; neutralizing agent: 1-5 parts. The invention has the beneficial effects that: the oil-soluble corrosion inhibitor finally prepared by adopting pure ethanol, isopropanol, an active agent, organic corrosion inhibitor water, ethylenediamine and a neutralizing agent has good corrosion inhibition effect and good film forming property, has the function of resisting high hydrogen sulfide corrosion, does not emulsify oil products, does not generate precipitation when meeting oil, has no adverse effect on the quality of the oil, and adopts the neutralizing agent which is polyethylene polyamine and can play a role of neutralizing in acid and acid media.)

1. An oil-soluble corrosion inhibitor for a hydrogenation unit is characterized by comprising the following components: pure ethanol, isopropanol, an active agent, an organic corrosion inhibitor, water, ethylenediamine and a neutralizing agent.

2. A preparation method of an oil-soluble corrosion inhibitor of a hydrogenation device is characterized by comprising the following steps: comprises the following components in parts by weight:

pure ethanol: 77-80 parts;

isopropyl alcohol: 10-15 parts;

active agent(s): 10-15 parts;

organic corrosion inhibitor: 10-15 parts;

water: 60-70 parts;

ethylene diamine: 31-45 parts;

neutralizing agent: 1-5 parts.

3. The method for preparing the oil-soluble corrosion inhibitor for the hydrogenation unit according to claim 2, wherein the method comprises the following steps: the organic corrosion inhibitor is one or a mixture of more of cis-oleic acid amine ethyl imidazoline, trans-oleic acid amine ethyl imidazoline and oil-based amine ethyl imidazoline.

4. The method for preparing the oil-soluble corrosion inhibitor for the hydrogenation unit according to claim 2, wherein the method comprises the following steps: the organic corrosion inhibitor is a mixture of cis-oleic acid amine ethyl imidazoline, trans-oleic acid amine ethyl imidazoline and oil-based amine ethyl imidazoline according to a molar ratio of 1-2:1-2: 1-2.

5. The method for preparing the oil-soluble corrosion inhibitor for the hydrogenation unit according to claim 2, wherein the method comprises the following steps: the neutralizing agent is polyethylene polyamine, and the polyethylene polyamine is one or a mixture of more of diethylenetriamine, triethylene tetramine and tetraethylene pentamine.

6. The method for preparing the oil-soluble corrosion inhibitor for the hydrogenation unit according to claim 2, wherein the method comprises the following steps: the method comprises the following steps:

s1, stirring and mixing the pure ethanol and the isopropanol to obtain a first mixed solution;

s2, adding the active agent into the mixed solution for the second time under the condition of 30-60 ℃;

s3, adding ethylenediamine into the secondary mixed solution, stirring and raising the temperature, and preserving the temperature to obtain a tertiary mixed solution;

s4, filtering the third mixed solution to obtain a standby corrosion inhibitor;

s5, mixing and stirring water and ethylenediamine to obtain a water-amine mixed solution;

s6, adding the ready corrosion inhibitor into the aqueous amine mixed solution;

and S7, finally, adding a neutralizing agent into the mixed solution of the aqueous amine mixed solution and the standby corrosion inhibitor to obtain the finished product corrosion inhibitor.

7. The method for preparing the oil-soluble corrosion inhibitor for the hydrogenation unit according to claim 6, wherein the method comprises the following steps: the stirring speed in S3 was 100rpm, the temperature rising speed was 1 ℃/min, the stirring speed in S5 was 100rpm, and the stirring time was 1.5 hours.

8. The preparation method and the application of the hydrogenation unit oil-soluble corrosion inhibitor according to claim 2 are characterized in that: the active agent is a cationic surfactant, and the pH of the neutralizing agent is adjusted to be not less than 8.

9. The method for preparing the oil-soluble corrosion inhibitor for the hydrogenation unit according to claim 6, wherein the method comprises the following steps: the temperature rise range in the S3 is 50-70 ℃, and the heat preservation time is 25-90 minutes.

10. The application of the hydrogenation unit oil-soluble corrosion inhibitor is characterized in that: the oil soluble corrosion inhibitor is added or diluted by water and then is added into the top of a gas stripping tower and the inside of an absorption tower to be used for slowing down the corrosion speed of the low-temperature part of the tower top.

Technical Field

The invention relates to the technical field of oil-soluble corrosion inhibitors, in particular to an oil-soluble corrosion inhibitor for a hydrogenation device and a preparation method and application thereof.

Background

The heavy oil processing mainly comprises 4 process steps of delayed coking, viscous cracking heavy oil, catalytic cracking and heavy oil hydrogenation, the hydrogenation process is a heavy oil deep processing technology, normal pressure or vacuum residue oil is subjected to desulfurization, denitrification and demetalization under the action of hydrogen and a catalyst, so that the light product is obtained to the maximum extent, the product quality can be further optimized by combining a hydrogenation modification process, the product quality is improved, along with the increasingly perfect domestic environmental protection mechanism, higher requirements are provided for the quality of oil products, and the acceleration of the development of a residue oil hydrogenation technology and the combined use of the hydrogenation modification technology are particularly important.

Chinese patent No. CN105289750B provides an oil-soluble hydrogenation catalyst, a preparation method and application thereof, wherein the catalyst comprises the following components: one or more of VIII group and VIB group metal compounds, one or more of carboxylic acid organic compounds and alcohol organic compounds, and a vulcanizing agent, wherein the mass of the metal elements in the catalyst accounts for 0.5-15%, the vulcanizing agent is liquid sulfur or unstable sulfide which can be decomposed into H2S under the vulcanizing condition, and the mass of the element sulfur in the vulcanizing agent is 0.8-4 times of that of the metal elements in the catalyst.

However, the oil-soluble hydrogenation catalyst, the preparation method and the application thereof have poor corrosion inhibition effect, are easy to emulsify oil products, cause influence on the quality of the oil products, have poor product stability, and can not improve the dew point corrosion condition in the condensation process of a condensation cooling system at the top of a hydrogenation tower, so that a great amount of time is consumed for cleaning guardrails, and the oil-soluble hydrogenation catalyst is not beneficial to wide popularization and application.

Disclosure of Invention

The invention aims to provide an oil-soluble corrosion inhibitor for a hydrogenation device, a preparation method and application thereof, and aims to solve the problems that the corrosion inhibition effect is poor, oil is easy to emulsify, the quality of the oil is affected, the product stability is poor, and the dew point corrosion condition in the condensation process of a condensation cooling system at the top of a hydrogenation tower cannot be improved.

The technical scheme of the invention is as follows: an oil-soluble corrosion inhibitor for a hydrogenation unit comprises the following components: pure ethanol, isopropanol, an active agent, an organic corrosion inhibitor, water, ethylenediamine and a neutralizing agent.

An oil-soluble corrosion inhibitor for a hydrogenation device and a preparation method thereof comprise the following components in parts by weight:

pure ethanol: 77-80 parts;

isopropyl alcohol: 10-15 parts;

active agent(s): 10-15 parts;

organic corrosion inhibitor: 10-15 parts;

water: 60-70 parts;

ethylene diamine: 31-45 parts;

neutralizing agent: 1-5 parts.

Further, the organic corrosion inhibitor is one or a mixture of more of cis-oleic acid amine ethyl imidazoline, trans-oleic acid amine ethyl imidazoline and oleyl amine ethyl imidazoline.

Further, the organic corrosion inhibitor is a mixture of cis-oleic acid amine ethyl imidazoline, trans-oleic acid amine ethyl imidazoline and oleyl amine ethyl imidazoline according to a molar ratio of 1-2:1-2: 1-2.

Further, the neutralizing agent is polyethylene polyamine, and the polyethylene polyamine is one or a mixture of more of diethylenetriamine, triethylene tetramine and tetraethylene pentamine.

Further, the method comprises the following steps:

s1, stirring and mixing the pure ethanol and the isopropanol to obtain a first mixed solution;

s2, adding the active agent into the mixed solution for the second time under the condition of 30-60 ℃;

s3, adding ethylenediamine into the secondary mixed solution, stirring and raising the temperature, and preserving the temperature to obtain a tertiary mixed solution;

s4, filtering the third mixed solution to obtain a standby corrosion inhibitor;

s5, mixing and stirring water and ethylenediamine to obtain a water-amine mixed solution;

s6, adding the ready corrosion inhibitor into the aqueous amine mixed solution;

and S7, finally, adding a neutralizing agent into the mixed solution of the aqueous amine mixed solution and the standby corrosion inhibitor to obtain the finished product corrosion inhibitor.

Further, the stirring speed in S3 was 100rpm, the temperature rising speed was 1 ℃/min, the stirring speed in S5 was 100rpm, and the stirring time was 1.5 hours.

Further, the active agent is a cationic surfactant, and the pH of the neutralizing agent is adjusted to be not less than 8.

Further, the temperature rise in the S3 is in the range of 50-70 ℃, and the heat preservation time is 25-90 minutes.

The oil soluble corrosion inhibitor is added or diluted with water and then added into the top of a gas stripping tower and the inside of an absorption tower to slow down the corrosion speed of the low-temperature part of the tower top.

The invention provides an oil-soluble corrosion inhibitor of a hydrogenation device, a preparation method and application thereof through improvement, and compared with the prior art, the invention has the following improvement and advantages:

(1) the oil-soluble corrosion inhibitor finally prepared from pure ethanol, isopropanol, an active agent, organic corrosion inhibitor water, ethylenediamine and a neutralizing agent has good corrosion inhibition effect and film forming property, has the function of resisting high hydrogen sulfide corrosion, does not emulsify oil products, does not generate precipitate when meeting oil, and has no adverse effect on the quality of the oil.

(2) The adopted neutralizer is polyethylene polyamine, can play a role in neutralizing acidic medium, can play a synergistic role in cooperating with the organic corrosion inhibitor, can weaken the corrosion of the acidic medium to the product, and can promote the corrosion inhibition rate.

(3) The adopted cationic surfactant is mixed with other components to have better corrosion inhibition effect and good film forming property, and the cationic surfactant is injected into a condensation cooling system at the top of the hydrogenation tower to overcome dew point corrosion in the condensation process, thereby prolonging the service life of hydrogenation equipment and ensuring long-period safe operation of a production device.

Drawings

The invention is further explained below with reference to the figures and examples:

FIG. 1 is a schematic diagram of the structure of the preparation process of the present invention;

Detailed Description

The present invention will be described in detail with reference to fig. 1, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The invention provides an oil-soluble corrosion inhibitor for a hydrogenation unit through improvement, which is shown in figure 1 and comprises the following components: pure ethanol, isopropanol, an active agent, an organic corrosion inhibitor, water, ethylenediamine and a neutralizing agent.

A preparation method of an oil-soluble corrosion inhibitor of a hydrogenation device comprises the following steps:

pure ethanol: 77 parts;

isopropyl alcohol: 10 parts of (A);

active agent(s): 10 parts of (A);

organic corrosion inhibitor: 10 parts of (A);

water: 60 parts;

ethylene diamine: 31 parts of (B);

neutralizing agent: 1 part.

Further, the organic corrosion inhibitor is one or a mixture of more of cis-oleic acid amine ethyl imidazoline, trans-oleic acid amine ethyl imidazoline and oleyl amine ethyl imidazoline.

Further, the organic corrosion inhibitor is a mixture of cis-oleic acid amine ethyl imidazoline, trans-oleic acid amine ethyl imidazoline and oleyl amine ethyl imidazoline according to a molar ratio of 1-2:1-2: 1-2.

Further, the neutralizing agent is polyethylene polyamine, and the polyethylene polyamine is one or a mixture of more of diethylenetriamine, triethylene tetramine and tetraethylene pentamine.

Further, the method comprises the following steps:

s1, stirring and mixing the pure ethanol and the isopropanol to obtain a first mixed solution;

s2, adding an active agent into the mixed solution for the second time under the condition of 30 ℃;

s3, adding ethylenediamine into the secondary mixed solution, stirring and raising the temperature, and preserving the temperature to obtain a tertiary mixed solution;

s4, filtering the third mixed solution to obtain a standby corrosion inhibitor;

s5, mixing and stirring water and ethylenediamine to obtain a water-amine mixed solution;

s6, adding the ready corrosion inhibitor into the aqueous amine mixed solution;

and S7, finally, adding a neutralizing agent into the mixed solution of the aqueous amine mixed solution and the standby corrosion inhibitor to obtain the finished product corrosion inhibitor.

Further, the stirring speed in S3 was 100rpm, the temperature rising speed was 1 ℃/min, the stirring speed in S5 was 100rpm, and the stirring time was 1.5 hours.

Further, the active agent is a cationic surfactant, and the pH of the neutralizing agent is adjusted to not less than 8.

Further, the elevated temperature in S3 was in the range of 50 degrees, and the holding time was 25 minutes.

The oil soluble corrosion inhibitor is added or diluted with water and then added into the top of a gas stripping tower and the inside of an absorption tower to slow down the corrosion speed of the low-temperature part of the tower top.