A defoaming concentration agent for concentrated treatment of cyclohexanone waste alkali

Abstract

The application discloses a defoaming and concentration agent for concentrated treatment of cyclohexanone waste lye, which is mainly prepared from polyether and hydrogen-containing silicone oil with a certain molecular weight by an emulsion polymerization method, and the product is a main defoaming and bubble inhibiting component. By adding metal chelating agents, scale inhibiting components, non-ionic surfactant components and scale softening components, the synergistic effect of the components is achieved, and the cyclohexanone waste lye evaporation defoaming and concentration agent is compounded. The defoaming and concentration agent is simple to use, the production process is free of three wastes, the defoaming and concentration effect is obvious, and the waste lye concentration solid content is effectively improved while the steam consumption is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to an agent for evaporation and concentration of cyclohexanone saponification liquid, and belongs to the agent category in fine chemical industry. BACKGROUND

[0002] In the industrial production of cyclohexanone from cyclohexane oxidation, an organic saponification liquid is produced. The saponification liquid is a brown-black viscous liquid with strong irritating odor. Its composition varies with the difference of cyclohexane oxidation process, and the main components are organic acid sodium salt and water. The COD mass concentration is 5×105 mg / L-7×105 mg / L, and the pH value is 10-14. The solid content of the saponification liquid from the high-pressure device of cyclohexane oxidation without concentration is generally 18%-30%. If it is directly discharged, it will cause serious environmental pollution. The ordinary biochemical method is difficult to effectively treat, and the method of evaporation and concentration first and then incineration is generally adopted.

[0003] The traditional cyclohexanone saponification liquid treatment process is to sequentially send the saponification liquid produced by the cyclohexanone device into a heat exchanger for heating and a flash evaporator for flashing. The gas phase enters the gas phase recovery system for condensation and recovery, and the liquid phase is pumped to a special incinerator for incineration with heavy oil assistance to obtain by-product steam and recovered sodium carbonate. In recent years, some cyclohexanone devices have been expanded and modified, and the saponification liquid discharge has been further increased, which puts forward higher requirements for the treatment technology. With the rise of crude oil price, how to improve the concentration of saponification liquid and reduce the consumption of heavy oil has become an urgent problem in the industry.

[0004] In recent years, on the basis of the traditional process, various cyclohexanone production enterprises have successively improved the saponification liquid evaporation and concentration process, and adopted multi-stage evaporation process, forced circulation evaporation process, external boiling process, spray flash evaporation process, rapid cooling and crystal breaking evaporation process, and adding evaporation agent method. Certain effects have been achieved, especially the combination of the above-mentioned evaporation and concentration technologies to achieve better results and obtain high-concentration saponification liquid.

[0005] Mitsubishi Chemical Corporation of Japan has developed an evaporation agent, and the addition amount is 2%, which can concentrate the saponification liquid to a solid content of 57%. However, the addition amount of the agent is large, and the operation is under vacuum, which has high operation cost and certain difficulty in practical application.

[0006] Patent CN141555A, Juhua Group Corporation and Zhejiang University jointly developed by two polyether evaporation aid. The preparation method is: first, the reaction of ethylene oxide, C12 fatty alcohol, naphthenic alcohol, water, nonyl phenol and NaOH, under the pressure of 0.1-0.3 MPa, at 150-180 ℃, to obtain a mixture of polyether 1 and solvent; under the same reaction conditions, the addition of ethylene oxide, C12 fatty alcohol and NaOH to obtain polyether 2, the mixture of the above two is stirred to obtain the evaporation aid. The evaporation of the solid content is very high, and the operation is under atmospheric pressure, and the amount of the aid is small. Due to the dual role of polyether 1 and polyether 2, not only can it play a role in defoaming, but also can make the saponification solution uniformly dispersed in the evaporation process, and has good flowability, and can obtain high concentration of evaporation liquid. The disadvantage is that the preparation process of polyether is complex, the production equipment is high, and the production cost is high, so as to increase the cost of the treatment of cyclohexanone saponification solution.

[0007] Patent CN1336331A, Sinopec Corporation Balin Branch in the waste lye evaporator of cyclohexane oxidation liquid is added a kind to be made of polyether non-ionic surfactant waste lye evaporation promoter. Main component is polyoxypropylene polyoxyethylene block polymer, and then a mixture of cyclohexanol with carbon number 1-9, fatty alcohol and water is added. After use, the running effect of waste lye evaporation system is obviously improved, the evaporation capacity of waste lye evaporator is improved, and the continuous running time is prolonged. The main component of the waste lye evaporation promoter of this patent is polyoxypropylene polyoxyethylene block polymer, the production process is complex, the cost is relatively high, and the waste lye evaporation promoter is mainly intermittent. SUMMARY

[0008] The purpose of the application is to develop a high-efficiency cyclohexanone waste lye concentration defoaming and concentration aid, which can defoam, suppress foam and increase concentration in the process of waste lye concentration, reduce the scaling phenomenon in the process of waste lye concentration and transportation, improve the flow performance of waste lye, improve the running effect of waste lye evaporation and concentration system, improve the evaporation capacity of saponification liquid heat exchanger, and reduce the steam consumption.

[0009] The product synthesized by the emulsion polymerization method with polyether and hydrogen-containing silicone oil as main raw materials is the main defoaming and foam suppressing component, and the waste lye defoaming and concentration agent is compounded by adding metal chelating agent, scale inhibiting component, non-ionic surfactant component and scale softening component to play the synergistic effect of each component.

[0010] The main technical scheme of the application is a defoaming and concentration agent for cyclohexanone waste lye concentration treatment, which comprises main components of polyether modified silicone oil, metal chelating agent, scale inhibiting component, non-ionic surfactant component and scale softening component; the polyether modified silicone oil is obtained by emulsion polymerization with polyether and hydrogen-containing silicone oil as raw materials.

[0011] Generally, the molar ratio of polyether to hydrogen-containing silicone oil is 1.2-1.5:1, the emulsifier is Span and Tween, the adding amount of Span and Tween is 5%-12% of the total amount of polyether and hydrogen-containing silicone oil, and the weight ratio of Span to Tween is 1.0-1.5:1.

[0012] The molecular weight of the polyether is 800-1500, the hydrogen content of the hydrogen-containing silicone oil is 0.18%-0.5%, and the molecular weight of the hydrogen-containing silicone oil is 2000-3000.

[0013] The Span is one of Span-20, Span-60 or Span-80, and the Tween is Tween-60 or Tween-80.

[0014] The metal chelating agent is one or both of low-molecular polyacrylic acid sodium and octadecylamine, and the adding amount is 0.5%-2% of the total amount of the defoaming and thickening agent.

[0015] The scale inhibition component is one or both of polyaspartic acid and acrylic acid homopolymer, and the adding amount is 3%-5% of the total amount of the defoaming and thickening agent, wherein the molecular weight of the acrylic acid homopolymer is 1200-1500.

[0016] The non-ionic surfactant component is a fatty alcohol polyoxyethylene ether, and the adding amount is 3%-5% of the total amount of the defoaming and thickening agent.

[0017] The scale softening component is polyepoxysuccinic acid, and the adding amount is 5%-8% of the total amount of the defoaming and thickening agent.

[0018] The emulsion polymerization in the application is to add polyether, hydrogen-containing silicone oil and water into Span and Tween in proportion, emulsify, heat to 80℃, start to drop the catalyst aqueous solution of chloroplatinic acid, stir, and as the catalyst is dropped, the reaction temperature rises, after the dropping is completed, heat to 110-120℃ and keep warm.

[0019] Preferably, in the emulsion polymerization, the adding amount of the catalyst aqueous solution of chloroplatinic acid is 20-30ppm, the stirring speed is 200-300r / min, the dropping time is 0.5-1.0h, and after the dropping is completed, heat and keep warm for 2h.

[0020] Beneficial effects: the waste alkali defoaming and thickening agent in the application is used in a cyclohexanone waste alkali concentration device, the using amount is 3-20ppm, after the waste alkali is concentrated, the solid content is more than 52%, the flowability is good, the scaling is not easy, and the steam consumption is reduced by 5kg / t in the concentration process. DETAILED DESCRIPTION

[0021] The technical solutions of the application are further described below in combination with examples.

[0022] Example 1

[0023] Reaction kettle in turn add molecular weight 1500 polyether 150 kg, hydrogen content 0.18% molecular weight 2000 hydrogen-containing silicone oil 200 kg, deionized water 500 kg, open stirring, heating to 60℃, add each 8.75 kg spand 60 and Tween-60 emulsification, emulsification 1 h, heating to 80℃, start to drop the catalyst aqueous solution of chloroplatinic acid 50 kg, drop time 0.5 h, with the addition of catalyst, the temperature gradually rises, drop end, maintain temperature 110℃~120℃ for 2 h. Subsequently cooling water cooling to 60℃~80℃, in turn add 3 kg polyaspartic acid and 2 kg acrylic acid homopolymer, 0.3 kg polyacrylic acid sodium acrylate and 0.2 kg octadecylamine, 5 kg polyepoxysuccinic acid, fatty alcohol polyoxyethylene ether 3 kg and the right amount of deionized water to the total material added to 1000 kg, stirring 0.5~1.0 h to the solution is milky white uniform solution. Drop to room temperature discharge packaging.

[0024] A company cyclohexanone waste lye concentration device, 25 kg of the above-mentioned defoaming concentration agent diluted by 3 tons of process water, control flow 0.1 m 3 / h into the I effect evaporator temperature, cyclohexanone saponification liquid is added to the II effect evaporator flow 18 m3 / h, II effect evaporator temperature 100℃, into the I effect evaporator again, I effect evaporator temperature 108℃, I effect evaporator outlet cyclohexanone saponification liquid solid content 52.7%.

[0025] Example 2

[0026] Reaction kettle in turn add molecular weight 1200 polyether 180 kg, hydrogen content 0.5% molecular weight 2000 hydrogen-containing silicone oil 200 kg, deionized water 500 kg, open stirring, heating to 60℃, add 24.9 kg spand 60 and 20.7 kg Tween-60 emulsification, emulsification 1 h, heating to 80℃, start to drop the catalyst aqueous solution of chloroplatinic acid concentration 30 ppm 50 kg, drop time 0.5 h, with the addition of catalyst, the temperature gradually rises, drop end, maintain temperature 110℃~120℃ for 2 h. Subsequently cooling water cooling to 60℃~80℃, in turn add 3 kg polyaspartic acid and 2 kg acrylic acid homopolymer, 0.3 kg polyacrylic acid sodium acrylate and 0.2 kg octadecylamine, 6 kg polyepoxysuccinic acid, fatty alcohol polyoxyethylene ether 3 kg and the right amount of deionized water to the total material added to 1000 kg, stirring 0.5~1.0 h to the solution is milky white uniform solution. Drop to room temperature discharge packaging.

[0027] A company cyclohexanone waste lye concentration device, 25 kg of the above-mentioned defoaming concentration agent diluted by 3 tons of process water, control flow 0.1 m 3 / h into the I effect evaporator temperature, cyclohexanone saponification liquid is added to the II effect evaporator flow 18 m3 / h, II effect evaporator temperature 100℃, into the I effect evaporator again, I effect evaporator temperature 108℃, I effect evaporator outlet cyclohexanone saponification liquid solid content 52.7%. 3 / h, the temperature of the second effect evaporator 100℃, then into the first effect evaporator, the temperature of the first effect evaporator 108℃, the solid content of the cyclohexanone saponification liquid at the outlet of the first effect evaporator 55.2%.

[0028] Example 3

[0029] In the reaction kettle, 180 kg of polyether with molecular weight 1200, 240 kg of hydrogen-containing silicone oil with hydrogen content 0.5% and molecular weight 2000, and 500 kg of deionized water were sequentially added. After stirring was started and the temperature was raised to 60℃, 18.8 kg of Span 60 and 13.8 kg of Tween-60 were added for emulsification. After emulsification for 0.5 h, the temperature was raised to 80℃, and the catalyst, 50 kg of an aqueous solution of chloroplatinic acid with a concentration of 30 ppm, was added dropwise for 0.5 h. As the catalyst was added dropwise, the temperature gradually increased. After the addition was completed, the temperature was maintained at 110℃-120℃ for 2 h. Subsequently, the temperature was lowered to 60℃-80℃ by cooling with cooling water, and 2 kg of polyaspartic acid, 1 kg of acrylic acid homopolymer, 1.3 kg of sodium polyacrylate, and 0.7 kg of octadecylamine were sequentially added. Then, 5 kg of polyepoxysuccinic acid, 5 kg of fatty alcohol polyoxyethylene ether, and an appropriate amount of deionized water were added to a total of 1000 kg of material. After stirring for 0.5-1.0 h, a milky white uniform solution was obtained. After the temperature was lowered to room temperature, the product was discharged and packaged.

[0030] A cyclohexanone waste alkali concentration device of a certain company was used. The above-mentioned defoaming and concentration agent 25 kg diluted with 3 tons of process water was controlled at a flow rate of 0.1 m 3 / h into the first effect evaporator, the cyclohexanone saponification liquid was added into the second effect evaporator at a flow rate of 15.5 m3 / h, the temperature of the second effect evaporator was 100℃, then into the first effect evaporator, the temperature of the first effect evaporator was 108℃, and the solid content of the cyclohexanone saponification liquid at the outlet of the first effect evaporator was 54.5%.

[0031] Example 4

[0032] Reaction kettle is added in turn molecular weight 1200 polyether 180 kg, hydrogen content 0.5% molecular weight 2000 hydrogen-containing silicone oil 220 kg, deionized water 500 kg, open stirring, heating to 60 ℃, add 19.6 kg of Span 80 and 16.4 kg of Tween-80 for emulsification, emulsification 0.8 h, heating to 80 ℃, start to drop the catalyst chloroplatinic acid concentration is 25 ppm aqueous solution 50 kg, drop time 0.5 h, with the drop of catalyst, the temperature gradually rises, drop end, maintain temperature 110 ℃ ~ 120 ℃ for 2 h. Subsequently, cooling water cooling to 60 ℃ ~ 80 ℃, add 2 kg of polyaspartic acid and 1 kg of acrylic acid homopolymer, 1.3 kg of polyacrylic acid sodium and 0.7 kg of octadecylamine, 5 kg of polyepoxysuccinic acid, fatty alcohol polyoxyethylene ether 5 kg and the right amount of deionized water to the total material added to 1000 kg, stirring 0.5 ~ 1.0 h to the solution is milky white uniform solution. Reduced to room temperature discharge packaging.

[0033] A company cyclohexanone waste lye concentration device, 25 kg of the above-mentioned defoaming concentration agent diluted by 3 tons of process water, control flow 0.1 m 3 / h into the I effect evaporator temperature, cyclohexanone saponification liquid is added to the II effect evaporator flow 15.5 m 3 / h, II effect evaporator temperature 100 ℃, into the I effect evaporator again, I effect evaporator temperature 108 ℃, I effect evaporator outlet cyclohexanone saponification liquid solid content 54.8%.

[0034] Example 5

[0035] Reaction kettle is added in turn molecular weight 1200 polyether 180 kg, hydrogen content 0.22% molecular weight 3000 hydrogen-containing silicone oil 300 kg, deionized water 500 kg, open stirring, heating to 60 ℃, add 25.1 kg of Span 60 and 22.9 kg of Tween-40 for emulsification, emulsification 1.0 h, heating to 80 ℃, start to drop the catalyst chloroplatinic acid concentration is 30 ppm aqueous solution 50 kg, drop time 0.5 h, with the drop of catalyst, the temperature gradually rises, drop end, maintain temperature 110 ℃ ~ 120 ℃ for 2 h. Subsequently, cooling water cooling to 60 ℃ ~ 80 ℃, add 2 kg of polyaspartic acid and 3 kg of acrylic acid homopolymer, 1.5 kg of polyacrylic acid sodium and 0.5 kg of octadecylamine, 8 kg of polyepoxysuccinic acid, fatty alcohol polyoxyethylene ether 4.5 kg and the right amount of deionized water to the total material added to 1000 kg, stirring 0.5 ~ 1.0 h to the solution is milky white uniform solution. Reduced to room temperature discharge packaging.

[0036] A company cyclohexanone waste lye concentration device, 25 kg of the above-mentioned defoaming concentration agent diluted by 3 tons of process water, control flow 0.66 m 3 / h into the I evaporator temperature, cyclohexanone saponification liquid into the II evaporator flow 18 m 3 / h, II evaporator temperature 100℃, into the I evaporator again, I evaporator temperature 108℃, I evaporator outlet cyclohexanone saponification liquid solid content 57.0%.

[0037] Example 6

[0038] The reactor was sequentially charged with 180 kg of polyether with a molecular weight of 1200, 300 kg of hydrogen-containing silicone oil with a hydrogen content of 0.22% and a molecular weight of 2500, and 500 kg of deionized water. The stirring was started, and the temperature was raised to 60℃. 25.1 kg of Span 60 and 22.9 kg of Tween-40 were added for emulsification. The emulsification was carried out for 1.0 h, and the temperature was raised to 80℃. The catalyst, a 50 kg aqueous solution of chloroplatinic acid with a concentration of 30 ppm, was added dropwise for 0.5 h. The temperature gradually increased during the catalyst dropwise addition. After the dropwise addition was completed, the temperature was maintained at 110℃-120℃ for 2 h. Subsequently, the temperature was lowered to 60℃-80℃ by cooling water. 2 kg of polyaspartic acid, 3 kg of acrylic acid homopolymer, 1.5 kg of sodium acrylate, 0.5 kg of octadecylamine, 8 kg of polyepoxysuccinic acid, 4.5 kg of fatty alcohol polyoxyethylene ether, and an appropriate amount of deionized water were sequentially added to a total material of 1000 kg. The stirring was carried out for 0.5-1.0 h until the solution became a milky white uniform solution. The temperature was lowered to room temperature, and the material was discharged and packaged.

[0039] A cyclohexanone waste alkali concentration device of a certain company was diluted with 25 kg of the above-mentioned defoaming and concentration agent at a flow rate of 0.66 m 3 / h into the I evaporator temperature, cyclohexanone saponification liquid into the II evaporator flow 18 m 3 / h, II evaporator temperature 100℃, into the I evaporator again, I evaporator temperature 108℃, I evaporator outlet cyclohexanone saponification liquid solid content 58.2%.

[0040] Example 7

[0041] A reaction kettle is added in sequence 150 kg of polyether with molecular weight 1500, 200 kg of hydrogen-containing silicone oil with hydrogen content 0.18% and molecular weight 2000, 500 kg of deionized water, open stirring, temperature is raised to 60℃, 20.4 kg of Span 60 and Tween-40 are added respectively for emulsification, emulsification for 1 h, temperature is raised to 80℃, 50 kg of catalyst 26 ppm chloroplatinic acid aqueous solution is started to be added dropwise, dropwise adding time is 0.5 h, with the dropwise adding of catalyst, temperature gradually rises, after dropwise adding is finished, temperature is maintained at 110℃~120℃ for 2 h. Then cooling water is passed to reduce temperature to 60℃~80℃, 2.8 kg of polyaspartic acid and 2.4 kg of acrylic acid homopolymer, 0.6 kg of polyacrylic acid sodium acrylate and 08 kg of octadecylamine, 5.0 kg of polyepoxysuccinic acid, 3.6 kg of fatty alcohol polyoxyethylene ether and appropriate amount of deionized water are added in sequence until the total material is 1000 kg, stirring for 0.5~1.0 h until the solution is milky white and uniform solution. Reduce to room temperature and discharge for packaging.

[0042] A cyclohexanone waste lye concentration device of a certain company, 25 kg of the above-mentioned defoaming concentration agent diluted by 3 tons of process water, control flow 0.1 m 3 / h into the I-effect evaporator temperature, cyclohexanone saponification liquid is added into the II-effect evaporator with flow 16.8 m 3 / h, the II-effect evaporator temperature is 100℃, then into the I-effect evaporator, the I-effect evaporator temperature is 108℃, the solid content of the cyclohexanone saponification liquid at the I-effect evaporator outlet is 54.1%.

[0043] Example 8

[0044] A reaction kettle is added in sequence 150 kg of polyether with molecular weight 1500, 200 kg of hydrogen-containing silicone oil with hydrogen content 0.18% and molecular weight 2000, 500 kg of deionized water, open stirring, temperature is raised to 60℃, 20.4 kg of Span 60 and Tween-40 are added respectively for emulsification, emulsification for 1 h, temperature is raised to 80℃, 50 kg of catalyst 26 ppm chloroplatinic acid aqueous solution is started to be added dropwise, dropwise adding time is 0.5 h, with the dropwise adding of catalyst, temperature gradually rises, after dropwise adding is finished, temperature is maintained at 110℃~120℃ for 2 h. Then cooling water is passed to reduce temperature to 60℃~80℃, 2.8 kg of polyaspartic acid and 2.4 kg of acrylic acid homopolymer, 0.6 kg of polyacrylic acid sodium acrylate and 08 kg of octadecylamine, 5.0 kg of polyepoxysuccinic acid, 3.6 kg of fatty alcohol polyoxyethylene ether and appropriate amount of deionized water are added in sequence until the total material is 1000 kg, stirring for 0.5~1.0 h until the solution is milky white and uniform solution. Reduce to room temperature and discharge for packaging.

[0045] A cyclohexanone waste lye concentration device of a certain company, 25 kg of the above-mentioned defoaming concentration agent diluted by 3 tons of process water, control flow 0.1 m 3 / h into the I-effect evaporator temperature, cyclohexanone saponification liquid is added into the II-effect evaporator with flow 16.8 m3 / h, the temperature of the second-effect evaporator was 100°C, the cyclohexanone saponification solution entered the first-effect evaporator, the temperature of the first-effect evaporator was 108°C, and the solid content of the cyclohexanone saponification solution at the outlet of the first-effect evaporator was 53.3%.

[0046] Example 9

[0047] The reactor was sequentially charged with 140 kg of polyether with a molecular weight of 1500, 200 kg of hydrogen-containing silicone oil with a molecular weight of 2000 and a hydrogen content of 0.18%, and 500 kg of deionized water, and stirring was started. The temperature was raised to 60°C, and 20.4 kg each of Span 60 and Tween-40 was added for emulsification. After 1 h of emulsification, the temperature was raised to 80°C, and 50 kg of a 26 ppm aqueous chloroplatinic acid catalyst was added dropwise over 0.5 h. The temperature gradually rose as the catalyst was added dropwise. After the addition was completed, the temperature was maintained at 110°C to 120°C for 2 h. Subsequently, the temperature was lowered to 60°C to 80°C by passing cooling water, and 2.8 kg of polyaspartic acid, 2.4 kg of acrylic acid homopolymer, 0.6 kg of sodium acrylate, 0.8 kg of octadecylamine, 5.0 kg of polyepoxysuccinic acid, 3.6 kg of fatty alcohol polyoxyethylene ether, and an appropriate amount of deionized water were sequentially added to a total of 1000 kg of material. The solution was stirred for 0.5 to 1.0 h until it became a uniform milky white solution. The temperature was lowered to room temperature, and the product was discharged and packaged.

[0048] A cyclohexanone waste lye concentration device of a company was used. The above-mentioned defoaming concentration agent 25 kg diluted with 3 tons of process water was controlled at a flow rate of 0.6 m 3 / h, and the cyclohexanone saponification solution entered the second-effect evaporator at a flow rate of 16.8 m 3 / h, the temperature of the second-effect evaporator was 100°C, the cyclohexanone saponification solution entered the first-effect evaporator, the temperature of the first-effect evaporator was 108°C, and the solid content of the cyclohexanone saponification solution at the outlet of the first-effect evaporator was 53.3%.

Claims

1. An antifoam densifier for concentrated treatment of cyclohexanone waste caustic, characterized by It includes main component polyether modified silicone oil, metal chelating agent, scale inhibition component, nonionic surfactant component and softening scale component;The polyether modified silicone oil is obtained by emulsion polymerization with polyether and hydrogen-containing silicone oil as raw materials, the emulsion polymerization is to add polyether, hydrogen-containing silicone oil and water into span and tween for emulsification, the temperature is raised to 80℃, the catalyst chloroplatinic acid aqueous solution is added dropwise, stirring, with the dropwise addition of catalyst, the reaction temperature rises, after the dropwise addition is completed, heating 110-120℃ for 2h;The molecular weight of the polyether is 800-1500, the hydrogen content of the hydrogen-containing silicone oil is 0.18%-0.5%, and the molecular weight is 2000-3000;The scale inhibition component is one or both of polyaspartic acid and acrylic acid homopolymer, the addition amount is 3%-5% of the total amount of defoaming and thickening agent, wherein the molecular weight of acrylic acid homopolymer is 1200-1500;The metal chelating agent is octadecylamine, the addition amount is 0.5%-2% of the total amount of defoaming and thickening agent;The nonionic surfactant component is fatty alcohol polyoxyethylene ether, the addition amount is 3%-5% of the total amount of defoaming and thickening agent;The softening scale component is polyepoxysuccinic acid, the addition amount is 5%-8% of the total amount of defoaming and thickening agent.

2. The defoaming densifier of claim 1, wherein The molar ratio of polyether to hydrogen-containing silicone oil is 1.2-1.5:1, the emulsifier is span and tween, the addition amount of span and tween is 5%-12% of the total amount of polyether and hydrogen-containing silicone oil, and the weight ratio of span to tween is 1.0-1.5:

1.

3. The defoaming densifier of claim 2, wherein Span is one of span-20, span-60 or span-80, and tween is tween-60 or tween-80.

4. The defoaming densifier of claim 1, wherein In the emulsion polymerization, the addition amount of catalyst chloroplatinic acid aqueous solution is 20-30ppm, the stirring speed is 200-300r / min, the dropwise addition time is 0.5-1.0h, and the heating and holding time after the dropwise addition is completed is 2h.