Production method of 2-acrylamide-2-methylpropanesulfonic acid

A technology based on methylpropanesulfonic acid and acrylamide, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of low purity and yield of AMPS products, affecting product preparation, and low work efficiency , to achieve the effect of reducing the length of the synthesis process, improving the synthesis efficiency, and improving the purity and yield

Active Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since acrylonitrile is greatly added in excess relative to the sulfonating agent, in order to minimize the content of acrylonitrile in the filter cake containing 2-acrylamido-2-methylpropanesulfonic acid, it is necessary to vacuum the filter cake obtained after filtration. Drying to prevent the acrylonitrile entrained in the filter cake from being brought into the subsequent A

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] According to the present invention, although the present invention does not have special requirements for the method and frequency of washing the filter cake containing 2-acrylamido-2-methylpropanesulfonic acid with glacial acetic acid in step (4), the glacial acetic acid can be continuously The filter cake containing 2-acrylamido-2-methylpropanesulfonic acid can be washed, and the filter cake containing 2-acrylamido-2-methylpropanesulfonic acid can also be washed several times with glacial acetic acid. In one embodiment, the method for washing the filter cake containing 2-acrylamido-2-methylpropanesulfonic acid obtained in step (3) with glacial acetic acid in step (4) is intermittent washing. The intermittent flushing means that the glacial acetic acid used to wash the filter cake containing 2-acrylamido-2-methylpropanesulfonic acid is not a continuous flushing. After rinsing with part of glacial acetic acid, it needs to be filtered, and then part of it is used after fil...

Example Embodiment

[0030] Example 1

[0031] This example is used to illustrate the production method of 2-acrylamido-2-methylpropanesulfonic acid provided by the present invention.

[0032] (1) In a four-necked flask equipped with a temperature control device, a stirrer, a thermometer and a gas feeding device, add 330g of acrylonitrile, cool the acrylonitrile to -10°C, add 61g of 102 wt% fuming sulfuric acid, and add During the process and after the addition is complete, maintain the temperature at -10°C and continue to stir for 1 hour to form an acrylonitrile solution of the sulfonating agent;

[0033] (2) After the temperature is raised to 38°C, 35 g of isobutylene is introduced for the reaction. After the introduction of isobutylene is completed, the reaction is completed after the temperature is kept for 1 hour to obtain a slurry product;

[0034] (3) Vacuum filtering the slurry product obtained in step (2) to obtain 180 g of filter cake containing 2-acrylamido-2-methylpropanesulfonic acid;

[0035]...

Example Embodiment

[0040] Example 2

[0041] Synthesize 2-acrylamido-2-methylpropanesulfonic acid according to the method of Example 1. The difference is that in step (4), the filter cake is continuously washed with 440g of glacial acetic acid and then filtered. -The mass ratio of the filter cake of acrylamido-2-methylpropanesulfonic acid is 2:1, the washing and filtering time is 15 minutes, and the other steps are the same. The purity of the obtained high-purity AMPS is 99.3% by weight. The yield was 85%.

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Abstract

The invention discloses a production method of 2-acrylamide-2-methylpropanesulfonic acid. The method comprises the steps of (1) mixing acrylonitrile with a sulfonating agent to form an acrylonitrile solution of the sulfonating agent; (2) enabling the acrylonitrile solution of the sulfonating agent, obtained in the step (1), to be in contact with isobutylene to form a pasty product; (3) filtering the pasty product to obtain a filter cake containing 2-acrylamide-2-methylpropanesulfonic acid; (4) washing the filter cake containing the 2-acrylamide-2-methylpropanesulfonic acid, obtained in the step (3), by using glacial acetic acid, thereby obtaining an AMPS crude product. By adopting the method, the synthesis time of the 2-acrylamide-2-methylpropanesulfonic acid can be effectively reduced, the synthesis efficiency is improved, and the cost is reduced. Moreover, the obtained product is high in yield and purity.

Description

technical field [0001] The invention relates to a production method of 2-acrylamido-2-methylpropanesulfonic acid. Background technique [0002] 2-acrylamide-2-methylpropanesulfonic acid (2-acrylamide-2-methylpropanesulfonic acid, hereinafter referred to as AMPS) is a multifunctional water-soluble anionic monomer, due to its molecular structure has carbon-carbon double bonds and is insensitive to salt The sulfonic acid group is easy to polymerize, and its homopolymer and copolymer have many special properties, which have broad application prospects and can be widely used in oilfield chemistry, water treatment agents, chemical fibers, plastics, printing and dyeing, coatings, and surfactants , antistatic agent, ceramics, photography, detergent additives, ion exchange resin, gas separation membrane, electronics industry and other fields. [0003] At present, the most typical process for producing AMPS is to prepare AMPS by reacting acrylonitrile, oleum and isobutylene under rel...

Claims

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Application Information

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IPC IPC(8): C07C309/15C07C303/44
Inventor 李斗星黄凤兴齐兰芝贾春革穆晓蕾
Owner CHINA PETROLEUM & CHEM CORP
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