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Method for extracting N-tert-butyl acrylamide

A technology of tert-butyl acrylamide and an extraction method, applied in the field of fine chemistry, can solve the problems of low extraction purity, material waste, low yield of N-tert-butyl acrylamide process and the like

Pending Publication Date: 2020-12-08
寿光市荣晟新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The process yield of extracting N-tert-butylacrylamide from the still residue of producing 2-acrylamido-2-methylpropanesulfonic acid is low, and the extraction purity is not high, resulting in serious waste of materials

Method used

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  • Method for extracting N-tert-butyl acrylamide

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Comparison scheme
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Embodiment 1

[0019] Embodiment 1 A kind of N-tert-butylacrylamide extraction method

[0020] Step 1. Raw material preparation

[0021] The raw material used is the residue produced during the production of 2-acrylamido-2-methylpropanesulfonic acid. The residue components include 55% tert-butylacrylamide, 6% acrylamide, 2-acrylamide - 20% of 2-methylpropanesulfonic acid, 14% of methacrylsulfonic acid, and 5% of copolymer, and the percentages are mass percentages.

[0022] Step 2, prepare crude product

[0023] The still residue and water are mixed according to the mass ratio of 1:3, and stirred to form a slurry; the slurry is separated by pressure filtration, the air pressure is 2.5KPa, the feed volume of the filter press is 80% of the volume of the filter press, and the filter cake contains The amount of water is less than 15%, and the filtrate is neutralized by reacting with sodium hydroxide, and then goes to the water treatment device for treatment.

[0024] The filter cake is crude N...

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Abstract

The invention provides a method for extracting N-tert-butyl acrylamide, which comprises the following steps: by using kettle residues for producing 2-acrylamide-2-methyl propanesulfonic acid as a rawmaterial, the kettle residues is mixed with water with stirring to obtian slurry; and the slurry is subjected to filter pressing, a filter cake obtained after filter pressing is an N-tert-butyl acrylamide crude product, and then N-tert-butyl acrylamide crude product treatment is carried out. The method is high in extraction yield, and the extracted N-tert-butyl acrylamide is high in purity and good in quality.

Description

technical field [0001] The invention relates to a method for extracting N-tert-butylacrylamide, which belongs to the technical field of fine chemistry. Background technique [0002] 2-acrylamido-2-methylpropanesulfonic acid is a multifunctional water-soluble anionic monomer with sulfonic acid groups, which can be both homopolymerized and copolymerized. Its sodium salt homopolymer has good thermal stability, and its decomposition temperature can reach 210 ℃, while the decomposition temperature of its homopolymer can be as high as 329 ℃. Now 2-acrylamido-2-methylpropanesulfonic acid has been widely used in oilfield chemicals, water treatment chemicals, textiles (spinning, dyeing), plastics, papermaking, coatings and other industrial production, producing excellent performance Antistatic agent, dyeing agent, dispersant, water absorbing agent, flocculant, foam stabilizer, special coating, oilfield chemical agent, etc. [0003] The side reaction of 2-acrylamido-2-methylpropanes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C231/24C07C233/09
CPCC07C231/24C07C233/09
Inventor 赵计虎单保卿李金磊
Owner 寿光市荣晟新材料有限公司
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