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Method for continuous production of high-quality alkyl benzene sulfonic acid

A high-quality technology of alkylbenzene sulfonic acid, applied in the field of daily chemical industry, can solve the problems of continuous production feasibility exploration, untested, and removal of free sulfuric acid, and achieve low price, reduce irritation, and improve utilization rate Effect

Active Publication Date: 2016-02-03
ZANYU TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In existing research and patents, although the alkylbenzene sulfonic acid has been deacidified, the free sulfuric acid has not been completely removed; To explore the feasibility of industrial production, whether it is feasible in industrial production remains to be verified

Method used

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  • Method for continuous production of high-quality alkyl benzene sulfonic acid
  • Method for continuous production of high-quality alkyl benzene sulfonic acid
  • Method for continuous production of high-quality alkyl benzene sulfonic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: in the continuous production of existing sulfonic acid, alkylbenzene generates alkylbenzenesulfonic acid anhydride, enters homogeneous system by 3t / h; Simultaneously, mass concentration is the calcium hydroxide aqueous emulsion of 45% by 100kg / h The speed of h enters the homogeneous system. Control the homogenization speed to 1400rpm, control the reaction temperature to 40°C, and control the reaction time to 20 minutes. After the reaction, centrifuge to obtain a finished product of benzenesulfonic acid with good quality, and store it at 35°C for 60 days in the later stage. The changes of active matter, color and free sulfuric acid, the specific indicators are as follows:

[0022]

Embodiment 2

[0023] Embodiment 2: in the continuous production of existing sulfonic acid, alkylbenzene generates alkylbenzenesulfonic acid anhydride, enters homogeneous system by 3t / h; Simultaneously, mass concentration is the calcium chloride aqueous solution of 30% by 100kg / h The speed enters the homogeneous system. Control the homogenization speed to 1000rpm, control the reaction temperature to 30°C, and control the reaction time to 30 minutes. After the reaction, centrifuge to obtain a finished product of benzenesulfonic acid with good quality, and store it at 35°C for 60 days in the later stage. The changes of active matter, color and free sulfuric acid, the specific indicators are as follows:

[0024]

Embodiment 3

[0025] Embodiment 3: in the continuous production of existing sulfonic acid, alkylbenzene generates alkylbenzenesulfonic acid anhydride, enters homogeneous system by 3t / h; Simultaneously, mass concentration is the calcium bicarbonate aqueous solution of 60% by 100kg / h The speed enters the homogeneous system. Control the homogenization speed to 2000rpm, control the reaction temperature to 50°C, and control the reaction time to 15 minutes. After the reaction is completed, centrifuge to obtain a finished product of benzenesulfonic acid with good quality, and store it at 35°C for 60 days in the later stage. The changes of active matter, color and free sulfuric acid, the specific indicators are as follows:

[0026]

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PUM

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Abstract

The invention relates to a method for continuous production of high-quality alkyl benzene sulfonic acid. The purpose comprises that the alkyl benzene sulfonic acid prepared by the method provided by the invention can reduce irritation caused by the presence of free sulfonic acid and also can improve the problem that the color and luster of alkyl benzene sulfonic acid is darkened in a process of storage. The technical scheme comprises that the method for continuous production of the high-quality alkyl benzene sulfonic acid includes the following steps: 1) sulfonating and aging alkyl benzene to obtain an anhydride, and allowing the anhydride to enter a homogeneous system simultaneously with a calcium ionic aqueous emulsion or aqueous solution according to a certain proportion online, wherein the feeding amount of the anhydride is determined by the sulfonation capacity; 2) homogenizing and mixing the material according to a certain homogenizing speed through a homogenizing pump, then allowing the material to enter a hydrolysis stay column, and further carrying out an aging reaction, wherein the certain homogenizing speed is 500-3000 rpm, the reaction time is 5-60 min, and the reaction temperature is 30-60 DEG C; and 3) separating the material coming out of the hydrolysis stay column to remove calcium sulfate in the material, and thus obtaining the high-quality alkyl benzene sulfonic acid product.

Description

technical field [0001] The invention belongs to the technical field of daily chemical industry, and specifically relates to a process for continuously producing high-quality alkylbenzene sulfonic acid. Background technique [0002] Alkylbenzenesulfonic acid, as an anionic surfactant, is a raw material for the preparation of washing powder, laundry cream and industrial detergents, and is also the main active substance of synthetic detergents. In 2010, the European Detergent Association made statistics on the production and consumption of anionic surfactants in 27 EU countries, and found that alkylbenzene sulfonate is the most consumed anionic surfactant in European countries, accounting for 33% of the market share ; In 2013, according to the incomplete statistics of my country's anionic surfactants by the Surfactant Professional Committee of the China Laundry Association, the sales volume of alkylbenzene sulfonates reached 48.13%. [0003] Due to the limitation of production ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C309/30C07C303/02C07C303/44
Inventor 徐坤华葛赞史立文华文高许荣年
Owner ZANYU TECH GRP CO LTD
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