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Synthesis method of 2-acrylamide-2-methylpropanesulfonic acid (AMPS)

A technology of acrylamide and methylpropanesulfonic acid, applied in the preparation of sulfonic acid, organic chemistry, etc., can solve the problems of low purity of AMPS, achieve high yield, and suppress the production of sulfonated by-products

Active Publication Date: 2013-03-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a kind of synthetic 2-acrylamido-2-methylpropanesulfonic acid that can obtain higher purity AMPS product in order to overcome the low defect of the AMPS purity that the method for the prior art produces Methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This example is used to illustrate the synthesis method of 2-acrylamido-2-methylpropanesulfonic acid provided by the present invention.

[0031] (1) In a four-neck flask equipped with a temperature control device, a stirrer, a thermometer and a gas feed device, add 330 g of acrylonitrile, cool the acrylonitrile to -10° C. and add 63 g of sulfuric acid with a concentration of 97% by weight. Then at this temperature, 10.7 g of acetic anhydride was added, the temperature was maintained at -10° C. during and after the addition and stirring was continued for 1 hour.

[0032](2) After raising the temperature to 40° C., 35 g of isobutylene was introduced to carry out the reaction.

[0033] (3) After the introduction of isobutylene is completed, the reaction is terminated after 1 hour of heat preservation. The reaction solution was vacuum filtered to obtain a filter cake and a filtrate. The filter cake was vacuum-dried at a drying temperature of 60° C. and a pressure of 10 KP...

Embodiment 2

[0036] This example is used to illustrate the synthesis method of 2-acrylamido-2-methylpropanesulfonic acid provided by the present invention.

[0037] (1) In a four-neck flask equipped with a temperature control device, a stirrer, a thermometer and a gas feed device, add 330 g of acrylonitrile, cool the acrylonitrile to -10° C. and add 63 g of sulfuric acid with a concentration of 95% by weight. Then at this temperature, add 9.1g P 2 o 5 , the temperature was maintained at -10°C during and after the addition and stirring was continued for 1 hour.

[0038] (2) After raising the temperature to 40° C., 35 g of isobutylene was introduced to carry out the reaction.

[0039] (3) After the introduction of isobutylene is completed, the reaction is terminated after 1 hour of heat preservation. The reaction solution was vacuum filtered to obtain a filter cake and a filtrate. The filter cake was vacuum-dried at a drying temperature of 60° C. and a pressure of 10 KPa to obtain a drie...

Embodiment 3

[0042] This example is used to illustrate the synthesis method of 2-acrylamido-2-methylpropanesulfonic acid provided by the present invention.

[0043] (1) In a four-neck flask equipped with a temperature control device, a stirrer, a thermometer and a gas feed device, add 330 g of acrylonitrile, cool the acrylonitrile to -10° C. and add 63 g of sulfuric acid with a concentration of 99% by weight. Then at this temperature, 5.5 g of propionic anhydride were added, the temperature was maintained at -10° C. during and after the addition and stirring was continued for 1 hour.

[0044] (2) After raising the temperature to 40° C., 35 g of isobutylene was introduced to carry out the reaction.

[0045] (3) After the introduction of isobutylene is completed, the reaction is terminated after 1 hour of heat preservation. The reaction solution was vacuum filtered to obtain a filter cake and a filtrate. The filter cake was vacuum-dried at a drying temperature of 60° C. and a pressure of 1...

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Abstract

The invention discloses a synthesis method of 2-acrylamide-2-methylpropanesulfonic acid (AMPS). The synthesis method comprises the step of contacting acrylonitrile, sulfuric acid and isobutene in the presence of anhydride and is characterized in that the dosage W of anhydride is (0.9-1.5)m; m is calculated according to the formula (1): m=(1-C)*m1*M*f / 18(1); in the formula (1), C is the concentration of the sulfuric acid and the unit is w%; m1 is the dosage of the sulfuric acid and the unit is gram; M is the molecular weight of anhydride; and f is the reaction coefficient of anhydride with water. By adopting the synthesis method of AMPS, generation of sulfonated by-products can be effectively inhibited by controlling the dosage of anhydride in the above range, thus the AMPS product with higher purity can be obtained in higher yield.

Description

technical field [0001] The invention relates to a method for synthesizing 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 a carbon-carbon double bond 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] The most typical process for producing AMPS at present is to prepare AMPS by reacting acrylonitrile, oleum and isobutylene under ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C309/15C07C303/06
Inventor 李斗星齐兰芝黄凤兴贾春革穆晓蕾赵冬
Owner CHINA PETROLEUM & CHEM CORP