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Sodium cumenesulfonate solution and preparation method thereof

A technology of sodium cumene sulfonate and cumene, applied in the direction of sulfonic acid preparation, sulfonate preparation, chemical instruments and methods, etc., can solve the problems of poor product quality, waste of raw materials, low efficiency, etc., and achieve saving of raw materials , Improve production efficiency and reduce costs

Inactive Publication Date: 2016-02-17
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the defect that the above-mentioned prior art exists, the purpose of this invention is to propose a kind of preparation method of sodium cumene sulfonate solution, to solve the waste of raw materials in the synthesis process of sodium cumene sulfonate, low efficiency, high cost and low product quality. poor quality problem

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of preparation method of sodium cumene sulfonate solution, concrete preparation steps are as follows:

[0022] Add 1.96t of 98% concentrated sulfuric acid to 3.84t of cumene at a constant speed under rapid stirring conditions, and react at 100°C. The cumene and the generated water are azeotroped, and the generated water is removed by reflux. After reacting for 6 hours, the amount of generated water is 354.64 kg. 1.44t of unreacted cumene was separated by vacuum distillation and collected for reuse.

[0023] Add 3.95 t of 20% sodium hydroxide solution to the reacted product under rapid stirring conditions to neutralize the product, and the content of sodium cumene sulfonate is 40.68%.

[0024] Control the temperature of the product at 45°C, add 308.22 kg of 30% hydrogen peroxide under stirring, and bleach for 2 hours.

Embodiment 2

[0026] A kind of preparation method of sodium cumene sulfonate solution, concrete preparation steps are as follows:

[0027] Add 0.72t of 98% concentrated sulfuric acid to 1.41t of cumene at a constant speed under rapid stirring conditions, and react at 110°C. The cumene and the generated water are azeotroped, and the generated water is removed by reflux. After 6 hours of reaction, the amount of generated water is 131.83kg. 0.53t of unreacted cumene was separated by vacuum distillation and collected for reuse.

[0028] Add 1.47t of 20% sodium hydroxide solution to the reacted product under rapid stirring condition to neutralize the product, and the content of sodium cumene sulfonate is 40.57%.

[0029] The temperature of the product was controlled at 45° C., 101.84 kg of 30% hydrogen peroxide was added under stirring, and bleached for 2 hours.

Embodiment 3

[0031] A kind of preparation method of sodium cumene sulfonate solution, concrete preparation steps are as follows:

[0032] Add 1.12t of 98% concentrated sulfuric acid to 2.19t of cumene at a constant speed under rapid stirring conditions, react at 105°C, cumene and generated water azeotrope, reflux to remove the generated water, react for 6h, the amount of generated water 205.52kg. 0.826t of unreacted cumene was separated by vacuum distillation and collected for reuse.

[0033] Add 2.28 t of 20% sodium hydroxide solution to the reacted product under rapid stirring condition to neutralize the product, and the content of sodium cumene sulfonate is 40.61%.

[0034] The temperature of the product was controlled at 45° C., and 152.40 kg of 30% hydrogen peroxide was added under stirring for 2 hours of bleaching.

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Abstract

The invention provides a sodium cumenesulfonate solution and a preparation method thereof. The preparation method comprises specific steps as follows: (1), concentrated sulfuric acid is added to cumene under a stirring condition, the mixture is subjected to azeotropic backflow dehydration, and a reaction is stopped when the water yield is about 95% of the theoretical water yield; (2), excessive unreacted cumene is separated under a vacuum condition, collected and recycled; (3), a reaction product is neutralized with a sodium hydroxide solution until the concentration of sodium cumenesulfonate is about 40%; (4), the product is bleached with hydrogen peroxide, and the high-quality sodium cumenesulfonate solution is obtained. With the adoption of the preparation method, the problem of inorganic sulfate in the sodium cumenesulfonate solution can be effectively solved, the content of cumene is controlled under a lower level, the clear and transparent sodium cumenesulfonate solution is obtained, the yield is improved, generation of waste acid and inorganic sulfate is avoided, and the cost is saved.

Description

technical field [0001] The invention relates to a preparation method of sodium cumene sulfonate solution. Background technique [0002] Sodium cumene sulfonate, also known as sodium cumene sulfonate, has a molecular formula of C 9 h 11 NaO 3 S, mainly used in cleaning agents and other industries as co-solvent, coupling agent and auxiliary agent, used in organic synthesis, daily chemicals and chemical reagents. [0003] In the traditional production method, excessive concentrated sulfuric acid is used to completely react cumene, producing a large amount of waste acid, and using a large amount of alkali such as sodium hydroxide to neutralize, wasting raw materials, increasing the cost, and sulfate Without effective recycling, the sulfate content in the product is difficult to be controlled at a low level. [0004] It can be seen that in the current production method, there is no mature method that can guarantee to obtain the high-quality sodium cumene sulfonate product, an...

Claims

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Application Information

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IPC IPC(8): C07C303/06C07C303/32C07C303/44C07C309/31
CPCC07C303/06C07C303/32C07C303/44C07C309/31
Inventor 许虎君李晓邦徐凯
Owner JIANGNAN UNIV
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