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Method for producing maleic acid disooctyl sodium sulfonate

A technology of sodium diisooctyl maleate sulfonate and maleic anhydride, applied in the directions of sulfonate preparation, carboxylate preparation, chemical instruments and methods, etc., can solve unfavorable maleic acid Large-scale production of sodium diisooctyl sulfonate products, unfavorable sulfonation efficiency and personal safety, increase product production costs and other problems, achieve the effects of improving effective utilization, shortening production cycle, and reducing product chromaticity

Inactive Publication Date: 2019-12-03
SHANDONG TAIHE WATER TREATMENT TECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] It has been disclosed that the synthesis process of diisooctyl sodium maleate sulfonate has a high temperature in the esterification stage, and the esterification product needs to go through a cooling process before entering the sulfonation stage for feeding. The cooling process takes a long time and prolongs the product manufacturing cycle; Alcohol anhydride feed ratio is too large, the esterification sulfonation stage needs to be protected by inert gas such as nitrogen; the sulfonation stage needs to add auxiliary solvents and other technical problems, which will easily cause high energy consumption and increase product production costs. The sulfonating agent mostly uses solid feeding method , which is not conducive to sulfonation efficiency and personal safety; at the same time, the generation of a large amount of esterification wastewater and tail gas absorption liquid is not conducive to the large-scale production of diisooctyl sodium maleate sulfonate products

Method used

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  • Method for producing maleic acid disooctyl sodium sulfonate

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Effect test

Embodiment 1

[0027] Under normal temperature and pressure, pour 306kg of isooctyl alcohol into the esterification reaction kettle, stir and heat up to 60±2°C, pour in 110kg of liquid maleic anhydride and 0.88kg of catalyst fluorine-containing strong acid cationic resin in sequence, and continue to heat up to 130±2°C, heat preservation reaction for 3.5 hours, to obtain diisooctyl maleate, the esterification rate is 98.93% by gas chromatography, the water generated by the reaction is condensed and separated, and the separated upper layer of isooctyl alcohol is recycled to The esterification kettle continued to react, and a total of 17.29 kg of esterification water with an alcohol content of 0.97% was separated out; the above-mentioned reaction product was filtered and directly poured into the sulfonation reactor, and the filtered catalyst could be recycled, and the concentration of the added mass percentage was 30 % sodium hydroxide aqueous solution to adjust the pH value of the system to 6.7...

Embodiment 2

[0030]Under normal temperature and pressure, pour 299kg of isooctyl alcohol into the esterification reaction kettle, stir and heat up to 60±2°C, then pour in 110kg of liquid maleic anhydride and 0.88kg of catalyst (of which 0.7kg of fluorine-containing strong acid cationic resin , p-toluenesulfonic acid 0.18kg), continue to heat up to 120±2°C, and keep warm for 3 hours to obtain diisooctyl maleate. The esterification rate is 98.79% by gas chromatography, and the water generated by the reaction is condensed After separation, the separated upper layer isooctyl alcohol is circulated to the esterification tank to continue the reaction, and a total of 18.44kg of esterification water with an alcohol content of 0.89% is separated; the above-mentioned reaction product is directly poured into the sulfonation reaction tank after being filtered, and added The aqueous solution of sodium hydroxide with a mass percentage concentration of 30% adjusts the pH value of the system to 6.5. The amo...

Embodiment 3

[0033] Substitute sodium bisulfite with sodium pyrosulfite as sulfonating agent, (wherein: the molar ratio of sodium pyrosulfite converted into sulfur dioxide content and maleic anhydride is 1.05:1) other operating methods and reaction parameter conditions are the same as in Example 1, Cooling to obtain a solid content of 50.48% is a total of 976.34kg of maleic acid diisooctyl sodium sulfonate aqueous solution, the product chromaticity 15Hazen, the product yield is 98.87% in terms of maleic anhydride charging amount, and the reaction takes 7 hours in total Hour.

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Abstract

The invention provides a method for producing maleic acid disooctyl sodium sulfonate. The method adopts maleic anhydride and isooctanol as raw materials and comprises the following steps: (1) by taking a halogen-containing strong-acidity resin and a sulfonic acid agent as catalysts, synthesizing maleic acid disooctyl; and (2) performing sulfonation by using a liquid sulfonation agent. By adoptingthe process method provided by the invention, the esterification reaction velocity can be increased, energy conservation and consumption reduction can be achieved, meanwhile, the chromaticity of a product can be reduced, the catalysts are easy to recycle and reuse, and the effective utilization rate of the sulfonation agent can be increased. The method is simple and easy to operate, is safe and environment-friendly and is good in permeability, stable in quality and easy in on-scale industrial production, and the chromaticity of the product is less than or equal to 20Hazen.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals production, and in particular relates to a production method of anionic surfactant diisooctyl maleate sulfonate sodium. Background technique [0002] Sodium di-isooctyl sulfonate maleate, also known as sodium di-isooctyl sulfonate succinate, is a class of excellent performance because of its low surface tension, good surface activity and high wetting force. Anionic surfactants are widely used in textiles, printing and dyeing, coatings, papermaking, medicine, pesticides, daily chemicals and other fields. Since the application of anionic surfactants in the formation of reverse micelles and the self-assembly of nanomaterials is of great significance, among them, diisooctyl sodium maleate has the best emulsifying properties, even in the formation of microemulsions. It is considered one of the best surfactants without adding a co-surfactant. Sodium diisooctyl sulfonate maleate can be dissolved...

Claims

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Application Information

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IPC IPC(8): C07C303/32C07C309/17
CPCC07C67/08C07C303/32C07C309/17C07C69/60
Inventor 程终发王燕平齐晓婧王宁宁陆久田杨尚文刘全华
Owner SHANDONG TAIHE WATER TREATMENT TECH CO LTD
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