阅读说明：本技术 一种利用废乳化液制备脱模剂的方法 (Method for preparing release agent by using waste emulsion ) 是由 陈爱民 赵韵 魏金晶 周煜 朱继秀 于 2019-08-05 设计创作，主要内容包括：本发明公开了一种利用废乳化液制备脱模剂的方法,按照以下步骤进行：(1)将800份废乳化液加入到混合槽中,同时往混合槽中加入40-80份破乳化剂,30-60分钟后将其通入油水分离器,待油水分离后,将油相先通入搅拌釜；(2)称取碱性物质40-100份加入150-300份水中溶解完全,制备碱溶液；将配好的碱溶液通入到装有油相的搅拌釜中,设置温度为50-70℃；(3)将搅拌釜中的油相和碱溶液搅拌15-60分钟后,将步骤(1)分离得到的水相通入至该搅拌釜,同时往搅拌釜中通入100-120份乳化剂,搅拌均匀后依次加入40-60份增白剂,60-70份滑石粉,2000-4000份水,在温度为50-70℃继续搅拌3-5小时,冷却至室温,出料得脱模剂产品。本发明具有显著的环境效益和经济效益。(The invention discloses a method for preparing a release agent by using waste emulsion, which comprises the following steps: (1) adding 800 parts of waste emulsion into a mixing tank, simultaneously adding 40-80 parts of demulsifier into the mixing tank, introducing the waste emulsion into an oil-water separator after 30-60 minutes, and introducing an oil phase into a stirring kettle after oil-water separation; (2) weighing 40-100 parts of alkaline substance, adding into 150-300 parts of water, and completely dissolving to prepare an alkaline solution; introducing the prepared alkali solution into a stirring kettle filled with an oil phase, and setting the temperature to be 50-70 ℃; (3) stirring the oil phase and the aqueous alkali in the stirring kettle for 15-60 minutes, introducing the water phase obtained by separation in the step (1) into the stirring kettle, simultaneously introducing 120 parts of 100-70 parts of emulsifier into the stirring kettle, sequentially adding 40-60 parts of whitening agent, 60-70 parts of talcum powder and 4000 parts of 2000-70 parts of water after uniform stirring, continuously stirring for 3-5 hours at the temperature of 50-70 ℃, cooling to room temperature, and discharging to obtain the release agent product. The invention has obvious environmental benefit and economic benefit.)

1. A method for preparing a release agent by using waste emulsion comprises the following steps:

(1) adding 800 parts of waste emulsion into a mixing tank, simultaneously adding 40-80 parts of demulsifier into the mixing tank, introducing the waste emulsion into an oil-water separator after 30-60 minutes, and introducing an oil phase into a stirring kettle after oil-water separation; the demulsifying machine is an AR type demulsifier with the concentration of 0.5-0.8 percent, and is obtained by diluting a commercially available AR type demulsifier with water;

(2) weighing 40-100 parts of alkaline substance, adding into 150-300 parts of water, and completely dissolving to prepare an alkaline solution; introducing the prepared alkali solution into a stirring kettle filled with an oil phase, wherein the rotating speed is 50-70 r/min, and the temperature is 50-70 ℃;

(3) stirring the oil phase and the aqueous alkali in the stirring kettle for 15-60 minutes, introducing the water phase obtained by separation in the step (1) into the stirring kettle, simultaneously introducing 120 parts of 100-70 parts of emulsifier into the stirring kettle, sequentially adding 40-60 parts of whitening agent, 60-70 parts of talcum powder and 4000 parts of 2000-70 parts of water after uniform stirring, continuously stirring for 3-5 hours at the temperature of 50-70 ℃, cooling to room temperature, and discharging to obtain a release agent product;

the above parts are all mass fractions.

2. The method of claim 1, wherein: in the step (2), the alkaline substance is one or more of sodium hydroxide, potassium hydroxide and sodium carbonate.

3. The method of claim 1, wherein: the dosage of the alkaline substance is 40-80 parts.

4. The method of claim 2, wherein: the dosage of the alkaline substance is 40-80 parts.

5. The method of any of claims 1-4, wherein: in the step (3), the emulsifier is a nonionic surfactant or low molecular alcohol.

6. The method of claim 5, wherein: the nonionic surfactant is fatty alcohol polyvinyl chloride ether.

7. The method of claim 5, wherein: the low molecular alcohol is one or more of ethanol, propanol and butanol.

8. The method of any of claims 1-4, wherein: in the step (3), the brightener is a fluorescent brightener VBL.

9. The method of any of claims 1-4, wherein: the particle size of the talcum powder is 800-1250 meshes.

(I) technical field

The invention relates to a method for preparing a release agent by using waste emulsion.

(II) technical background

In the production process of machinery manufacturing and processing enterprises, a large amount of emulsion is used for lubricating and cooling in metal cutting processing, and the emulsion is changed into waste water to be discharged after being used for a period of time. The waste emulsion contains a large amount of oil, has extremely high concentration of organic pollutants, generally reaches 20-50 ten thousand mg/L, and cannot meet the requirement of the emission limit value of the waste emulsion discharged into a public sewage treatment system. And the cost for treating the waste emulsion is very high, if the waste emulsion is directly discharged, the waste emulsion of 1 cubic meter can pollute high-quality surface water (COD is less than 20mg/L, centralized domestic drinking water) of 2-3 ten thousand cubic meters into four types of surface water (COD is less than 30mg/L, non-contact recreational water for human body).

The current methods for treating emulsion wastewater mainly comprise: chemical treatment, air-float, ultrafiltration, biochemical, combustion, high-pressure reverse osmosis, and catalytic treatment.

Patent CN1410365A discloses a method for treating emulsion by using industrial waste acid. The waste acid is used for treating the waste emulsion, and calcium carbonate is added at the same time. Although the method treats waste by waste, a large amount of chemical agents are needed, a large amount of sludge is generated, about one ton of waste emulsion is treated to generate one ton of solid sludge, and about 5 to 7 times of tap water is added for dilution. Still hardly reaches the sewage discharge standard (COD is less than 500mg/l) of the municipal sewage plant.

Patent CN108178360A discloses a method for purifying waste emulsion and a device for purifying waste emulsion using the same. And (3) carrying out ultrafiltration on the waste emulsion by using an ultrafiltration membrane to obtain clear water without floating oil, emulsion and dissolved oil. The method has the disadvantages of poor oil resistance and temperature resistance, short service life, very high cost and difficult popularization.

In patent CN102408158A, the method for treating steel rolling waste emulsion by using microorganisms is to carry out hydration degradation on domestic wastewater and waste emulsion by using microbial liquid in a primary treatment tank, and the secondary treatment liquid can be discharged after reaching the standard after detection. But the emulsion has poor biochemical performance, and the microorganisms are difficult to decompose the mineral oil synthesized emulsion of the home disinfectant and the antioxidant, and the method basically belongs to dilution discharge.

The patent CN1955547A discloses a method and application of using waste emulsion as fuel, in which the waste emulsion is used as fuel and ignited by an ignition device of a fuel burner. Because the method generates a large amount of atmospheric pollutants in the combustion process, and the regulation on the atmospheric pollutants in the national emission standard is very strict, the problem of waste gas generated by the combustion method is difficult to reach the emission standard.

Patent CN107188355A discloses a method for treating waste emulsion catalytic cracking media, which comprises adding catalyst into a reaction vessel, cracking into water and oil after reaction, and separating water and oil, wherein the oil can be burned or refined, and the water can be recycled. However, the purpose of strongly oxidizing the waste emulsion is achieved by adding oxygen under the conditions of certain pressure and catalytic medium, the treatment cost is high, and the equipment management is complex.

Patent CN105906118A discloses a low-salt recycling process for mechanically-cut emulsion, which adopts a vacuum distillation technology to realize distillation concentration of waste emulsion and wastewater recovery, but has high requirements on equipment and large investment.

Patent CN107176770A discloses a method for treating waste emulsion by ultrafiltration with nanoceramic membrane and electrochemical treatment, but also the membrane is expensive.

The method for treating the waste emulsion has the problems of easy secondary pollution, complex treatment process, expensive treatment material and the like.

Disclosure of the invention

The invention aims to provide a method for preparing a release agent by using waste emulsion, which solves the problem of treatment of the waste emulsion as a pollutant, has simple preparation method of the release agent, low cost and no generation of sewage and waste gas, and the prepared release agent has good water resistance and storage stability and has remarkable environmental benefit and economic benefit.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method for preparing a release agent by using waste emulsion comprises the following steps:

(1) adding 800 parts of waste emulsion into a mixing tank, simultaneously adding 40-80 parts of demulsifier into the mixing tank, introducing the waste emulsion into an oil-water separator after 30-60 minutes, and introducing an oil phase into a stirring kettle after oil-water separation; the demulsifying machine is an AR type demulsifier with the concentration of 0.5-0.8 percent, and is obtained by diluting a commercially available AR type demulsifier with water;

(2) weighing 40-100 parts of alkaline substance, adding into 150-300 parts of water, and completely dissolving to prepare an alkaline solution; introducing the prepared alkali solution into a stirring kettle filled with an oil phase, wherein the temperature is 50-70 ℃;

(3) stirring the oil phase and the alkali solution in the stirring kettle (preferably at a rotation speed of 50-70 rpm) for 15-60 minutes, introducing the water phase separated in the step (1) into the stirring kettle, simultaneously introducing 120 parts of emulsifier into the stirring kettle, sequentially adding 40-60 parts of whitening agent, 60-70 parts of talcum powder and 4000 parts of water after uniform stirring, continuously stirring at a temperature of 50-70 ℃ (preferably at a rotation speed of 100 rpm for 120-5 hours), cooling to room temperature, and discharging to obtain a release agent product;

the above fractions are mass fractions.

The waste emulsion in step (1) of the present invention is waste emulsion produced in metal working in the mechanical manufacturing industry, and is usually oils (such as mineral oil and vegetable oil), hydrocarbons (such as C)₅-C₁₃Saturated aliphatic hydrocarbons) and emulsions (e.g., mixtures of base oils such as number 7 mechanical high speed oil and emulsifiers such as potassium oleate soap) and water.

In the step (1), the demulsifying agent adopts an AR type demulsifying agent with the concentration of 0.5-0.8%, the AR type demulsifying agent is a commercial product, and the molecular structural formula is AR (PO)_x(EO)_yH, in the formula, EO-polyoxyethylene; PO-polyoxypropylene; an AR-resin; the polymerization degree of x, y and z is diluted to 0.5-0.8% by water before use. The dosage of the demulsifier can influence the demulsification and phase separation effect, and the demulsification and phase separation effect can be improved by increasing the dosage of the demulsifier within the dosage range.

Preferably, the stirring kettle is a temperature-controllable mechanical stirring kettle.

In the step (2) of the present invention, the alkaline substance is preferably one or more of sodium hydroxide, potassium hydroxide and sodium carbonate. The alkaline matter is added for saponification, a better reaction effect can be obtained within the dosage range of the alkaline matter, the reaction effect is improved along with the increase of the dosage, and when the dosage reaches about 80 parts, the dosage of the alkaline matter is increased, the effect is improved to a limited extent, so the dosage of the alkaline matter is preferably 40-80 parts.

In step (3) of the present invention, the emulsifier is preferably a nonionic surfactant or a low molecular alcohol. The nonionic surfactant is preferably fatty alcohol polyvinyl chloride ether. The low molecular alcohol is preferably one or more of ethanol, propanol and butanol. The amount of emulsifier used will affect the emulsifying effect, and within the stated ranges, increasing the amount of emulsifier improves the emulsifying effect.

In step (3) of the present invention, the whitening agent is a fluorescent whitening agent (VBL). The particle size of the talcum powder is preferably 800-1250 meshes. The addition of whitening agent and talcum powder can improve the appearance of the release agent.

Compared with the prior art, the invention has the beneficial effects that: the method for preparing the release agent by using the waste emulsion solves the problem of treatment of the waste emulsion as a pollutant, the mode for preparing the release agent is simple, the cost is low, no sewage or waste gas is generated, and the release agent has good water resistance and storage stability (especially low-temperature and high-temperature storage stability), and has remarkable environmental benefit and economic benefit.

(IV) description of the drawings

FIG. 1 is a flow chart of a process for preparing a release agent by recycling waste emulsion.

(V) detailed description of the preferred embodiments

The invention is described below with reference to examples. It should be noted that the examples are only for explaining the present invention, and are not limited to these examples. It is within the scope of the present invention to modify and replace the details and forms of the present invention.