Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of recrystallization method and preparation method of 2-acrylamido-2-methylpropanesulfonic acid

A technology of methylpropanesulfonic acid and acrylamide group, which is applied in the recrystallization method and preparation field of 2-acrylamido-2-methylpropanesulfonic acid, can solve the problem of low recrystallization yield, achieve the improvement of recrystallization The effect of crystallization yield, simple steps, and great commercial value

Active Publication Date: 2018-11-02
CHINA PETROLEUM & CHEM CORP +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, because the boiling points of acetic acid and water are close, only 2 / 3 of the water in the mother liquor can be evaporated at most, and the remaining water will dissolve 2-acrylamido-2-methylpropanesulfonic acid, resulting in its recrystallization and yield. low rate

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In a four-neck flask equipped with a temperature control device, a stirrer, a thermometer and a gas feed device, add 330 g of analytically pure acrylonitrile (wherein the content of acrylonitrile is 99.7 wt % of the total amount, and the balance is water). Cool to -10°C, slowly add 2wt% SO 3 61g of fuming sulfuric acid (that is, the sulfuric acid meter concentration is 100wt%), constant temperature 120 minutes. The temperature was raised to 40° C., and 35 g of gaseous isobutene was slowly introduced for reaction. After the introduction of isobutene is completed, the reaction is terminated after one hour of heat preservation, and a slurry product is obtained. The slurry product is vacuum filtered to obtain a filter cake and a filtrate. The filter cake is vacuum-dried at a drying temperature of 100° C. and a drying pressure of 10 KPa to obtain a dried filter cake that is crude 2-acrylamido-2-methylpropanesulfonic acid. After analysis, the yield was 91.5%, and the purit...

Embodiment 2

[0041] The difference from Example 1 is that during the recrystallization process, 264 g of carboxylic acid aqueous solution (24 g of water, 240 g of propionic acid) was used, and the mixture was heated to 80° C. (heating rate was 3° C. / min), and a rotary evaporator was used to About 155 g of solvent was drawn off. Through analysis, the yield of the recrystallization process is 92.4%, and the purity is 99.3wt%.

Embodiment 3

[0043] The difference from Example 1 is that during the recrystallization process, 224 g of carboxylic acid aqueous solution (including 24 g of water and 200 g of butyric acid) was used, the mixture was cooled to 70° C., and about 155 g of solvent was extracted using a rotary evaporator. Through analysis, the yield of the recrystallization process is 91.5%, and the purity is 99.3wt%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a recrystallization method of 2-acrylamido-2-methylpropanesulfonic acid, comprising the following steps: mixing 2-acrylamido-2-methylpropanesulfonic acid crude product and a carboxylic acid aqueous solution to obtain a mixture, heating the mixture, cooling, carrying out solid-liquid separation and drying solids to obtain a 2-acrylamido-2-methylpropanesulfonic acid pure product, wherein the carboxylic acid comprises at least one of C3-C9 fatty acids. The invention also provides a preparation method of 2-acrylamido-2-methylpropanesulfonic acid. By the method, a 2-acrylamido-2-methylpropanesulfonic acid pure product with higher recrystallization yield is obtained.

Description

technical field [0001] The invention relates to the production technical field of chemical products, in particular to a recrystallization method and preparation method of 2-acrylamido-2-methylpropanesulfonic acid. Background technique [0002] 2-Acrylamide-2-methylpropanesulfonic acid (AMPS) is a multifunctional water-soluble anionic monomer. Because its molecular structure has carbon-carbon double bonds and salt-insensitive sulfonic acid groups, it 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, surfactants, antistatic agents, ceramics, photography, detergent additives, ion exchange resins, gas separation membranes, electronics and other fields. [0003] At present, the most typical production process of 2-acrylamido-2-methylpropanesulfonic acid is to use acrylonitrile, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C07C309/15C07C303/44C07C303/02C07C303/06
CPCC07C303/02C07C303/06C07C303/44C07C309/15
Inventor 李斗星齐兰芝穆晓蕾贾春革
Owner CHINA PETROLEUM & CHEM CORP