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Solvent composition for recrystallization of 2-acrylamido-2-methylpropanesulfonic acid and application thereof

A methylpropanesulfonic acid and acrylamide-based technology, which is applied in the preparation of sulfonic acid, the preparation of organic compounds, organic chemistry, etc., can solve the problem of low recrystallization yield, achieve huge commercial value, controllable raw material cost, Effects in simple steps

Active Publication Date: 2018-11-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, because acetic acid and water form an azeotrope, 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 low yield

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 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 1 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 purity ...

Embodiment 2

[0045] The difference from Example 1 is that during the recrystallization process, 210 g of solvent composition (including 30 g of water and 180 g of ethylene glycol) was used, cooled to 65° C., and then about 135 g of solvent was extracted using a rotary evaporator. Through analysis, the yield of the recrystallization process is 91.7%, and the purity is 99.3wt%.

Embodiment 3

[0047] The difference from Example 1 is that during the recrystallization process, 220g of solvent composition (including 40g of N,N-dimethylformamide and 180g of heptane) was used and heated to 85°C (the heating rate was 3°C / min ), and then use a rotary evaporator to extract about 140 g of solvent. Through analysis, the yield of the recrystallization process is 94.0%, and the purity is 99.3wt%.

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PUM

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Abstract

The invention provides a solvent composition for recrystallization of 2-acrylamide-2-methylpropanesulfonic acid. The solvent composition comprises a component A and a component B, the component A is selected from at least one of water and C1-C8 amide, and the component B is selected from at least one of C1-C10 fatty alcohol, C2-C6 ketone and C6-C12 alkane; also the component A and the component B are in a weight ratio of 1:(3-15), preferably 1:(5-10). The invention also provides application of the solvent composition in recrystallization and synthesis method of 2-acrylamide-2-methylpropanesulfonic acid. By means of the solvent composition or method provided by the invention, a2-acrylamide-2-methylpropanesulfonic acid pure product with a higher recrystallization process yield can be obtained.

Description

technical field [0001] The invention relates to the production technical field of chemical products, in particular to a solvent composition for recrystallization of 2-acrylamido-2-methylpropanesulfonic acid and an application thereof. 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 t...

Claims

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Application Information

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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