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Method for comprehensive utilization of 2-acrylamide-2-methylpropanesulfonic acid production process waste residue

A technology of tert-butylacrylamide sulfonic acid and tert-butylacrylamide, applied in chemical instruments and methods, preparation of organic compounds, separation/purification of carboxylic acid amides, etc., can solve problems such as increasing production costs

Inactive Publication Date: 2016-04-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods not only do not produce economic benefits, but also increase production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 150g of AMPS production plant mixed waste residue is recovered according to the method of the present invention. The mass percentage of AMPS in the waste residue is 87%, the mass percentage of N-tert-butylacrylamide is 12%, and contains a small amount of other impurities. Put the waste residue into a glass distillation bottle, the lower part of the distillation bottle is heated with a water bath, and the upper part and the vacuum distillation pipeline are heated with an electric wire. Add 200 g of heptane into the distillation flask and start stirring.

[0023] The temperature in the glass retort was then maintained at 90°C. At the same time, the temperature in the collection bottle was set to 15°C. Turn on the vacuum system to keep the pressure in the recovery unit at 10kPa. The recovery process lasted for a total of 2 hours. Then vacuum-dry the remaining material in the distillation bottle and the material in the collecting bottle respectively. The temperature of...

Embodiment 2

[0025] A recovery method similar to that of Example 1 was used, except that the temperature of the distillation bottle and pipeline was set at 70° C., and the recovery process lasted 4 hours in total. The obtained product after drying in the distilling bottle is totally 134g, and the main component is AMPS, and the purity by liquid chromatography analysis is 96%; The purity by liquid chromatography analysis was 98.5%.

Embodiment 3

[0027] Using a recovery method similar to that of Example 1, the difference is that acetic acid is used as a solvent, and the recovery process lasts for 2 hours. The obtained product after drying in the distilling bottle is 132g in total, and the main component is AMPS, and the purity by liquid chromatography analysis is 98%; the obtained product after drying the material in the collection bottle is 16g in total, and the main component is N-tert-butylacrylamide, which is obtained by The purity by liquid chromatography analysis was 98.5%.

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Abstract

The present invention relates to a method for comprehensive utilization of 2-acrylamide-2-methylpropanesulfonic acid production process waste residue. The method comprises: mixing AMPS production waste residue and a solvent, filtering, carrying out vacuum heating on the filtrate, continuously heating the remaining solid after evaporating the solvent so as to sublime the remaining solid, recovering the sublimed product to obtain N-t-butyl acrylamide, and obtaining 2-acrylamide-2-methylpropanesulfonic acid from the unsublimated remaining solid, wherein the purity of the recovered N-t-butyl acrylamide is more than or equal to 98%, and the purity of the 2-acrylamide-2-methylpropanesulfonic acid is more than or equal to 96%. The invention further provides a recovery apparatus for the method, wherein the recovery apparatus comprises a heatable separation container for heating the 2-acrylamide-2-methylpropanesulfonic acid production waste residue, a temperature-adjustable collection container for collecting the sublimed N-t-butyl acrylamide, and a vacuum system.

Description

technical field [0001] The invention relates to a method for comprehensively utilizing the waste residue of the production process of tert-butylacrylamide sulfonic acid, in particular to a method for recovering tert-butylacrylamide sulfonic acid and N-tert-butyl from the waste residue of tert-butylacrylamide sulfonic acid production Acrylamide method. Background technique [0002] Tert-butylacrylamide sulfonic acid (molecular formula C 7 h 13 NO 4 S, hereinafter referred to as AMPS) is a multifunctional water-soluble anionic monomer, which is easy to polymerize due to its molecular structure with carbon-carbon double bonds and salt-insensitive sulfonic acid groups. Moreover, its homopolymer and copolymer have many special properties and have broad application prospects. They can be widely used in oilfield chemistry, water treatment agents, chemical fibers, plastics, printing and dyeing, coatings, surfactants, antistatic agents, ceramics, photography, Detergent additives,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C231/24C07C233/09C07C303/44C07C309/15
Inventor 李斗星齐兰芝黄凤兴张明森穆晓蕾贾春革
Owner CHINA PETROLEUM & CHEM CORP
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