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Treatment method of acrylonitrile for biologically preparing acrylamide

A technology of acrylamide and treatment method, applied in the direction of carboxylic acid nitrile purification/separation, organic chemistry, etc., can solve the problems of acrylamide quality fluctuation, hydration reaction batch reduction, nitrile hydratase activity reduction, etc., to reduce toxicity Side effects, maintenance of hydration activity, effects of high-efficiency preparation

Inactive Publication Date: 2018-03-09
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a treatment method for acrylonitrile suitable for biological preparation of acrylamide, which can improve the problems of reduced nitrile hydratase activity, reduced hydration reaction batches, and large fluctuations in acrylamide quality during the use of acrylonitrile

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Pass acrylonitrile at a temperature of 22°C through a ball with a diameter of 3mm and a pore volume of 0.38cm 3 / g, strength 50N / grain, bulk density 0.75g / cm 3 Activated alumina and a bulk density of 0.68g / mL, compressive strength ≥ 70N, molecular sieve deperoxide tower with a diameter of 3mm, the mass ratio of activated alumina balls and molecular sieve mixture is 1:1, and the passing time is 0.5 min, the discharge temperature of acrylonitrile is 20° C., and the content of 3-hydroxypropionitrile in the finally obtained acrylonitrile is 50 ppm.

Embodiment 2

[0020] Pass acrylonitrile at a temperature of 25°C through a ball with a diameter of 3.5mm and a pore volume of 0.38cm 3 / g, strength 50N / grain, bulk density 0.85g / cm 3 Activated alumina and a bulk density of 0.68g / mL, compressive strength ≥ 70N, molecular sieve deperoxide tower with a diameter of 3mm, the mass ratio of activated alumina balls and molecular sieve mixture is 1:1, and the passing time is 0.5 min, the discharge temperature of acrylonitrile is 20° C., and the content of 3-hydroxypropionitrile in the finally obtained acrylonitrile is 40 ppm.

Embodiment 3

[0022] Acrylonitrile at a temperature of 23°C passes through a ball with a diameter of 3.2mm and a pore volume of 0.4cm 3 / g, the strength is 50N / grain, and the bulk density is 0.81g / cm 3 Activated alumina and a bulk density of 0.68g / mL, compressive strength ≥ 70N, molecular sieve deperoxide tower with a diameter of 3mm, the mass ratio of activated alumina balls and molecular sieve mixture is 1:1, and the passing time is 0.5 min, the discharge temperature of acrylonitrile is 20° C., and the content of 3-hydroxypropionitrile in the finally obtained acrylonitrile is 35 ppm.

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Abstract

The invention relates to production of acrylonitrile, and specifically relates to a treatment method of acrylonitrile for biologically preparing acrylamide. The treatment method of acrylonitrile for biologically preparing acrylamide comprises the following steps: in the production process of acrylonitrile, firstly putting activated aluminum oxide balls and a molecular sieve combined adsorbing material into a peroxide tower, and then treating acrylonitrile through the peroxide tower. The feeding temperature, discharging temperature and residence time of acrylonitrile in the peroxide tower are adjusted by selecting an appropriate adsorbing material combination, and 3-hydroxypropionitrile can be controlled in a reasonable range in the peroxide process. Therefore, the toxic and side influenceof 3-hydroxypropionitrile for hydratase in the hydration process is reduced, the hydration activity of hydratase in the hydration process is maintained, and high-quality acrylamide is prepared efficiently.

Description

technical field [0001] The invention relates to the production of acrylonitrile, in particular to a treatment method for acrylonitrile suitable for preparing acrylamide by a biological method. Background technique [0002] Acrylonitrile is an important monomer for synthetic fibers, synthetic rubber and synthetic resins. The polyacrylonitrile fiber made from acrylonitrile, that is, "acrylic fiber", has properties very similar to wool; the nitrile rubber made from the copolymerization of acrylonitrile and butadiene has good oil resistance, cold resistance, abrasion resistance and electrical insulation Performance; Acrylonitrile, butadiene, and styrene are copolymerized to obtain ABS resin, which has the advantages of light weight, cold resistance, and good impact resistance; acrylonitrile can be hydrolyzed to obtain acrylamide, acrylic acid and its esters, which are important organic compounds. Chemical raw materials; acrylonitrile can also be electrolytically hydrogenated an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C253/34C07C255/08
Inventor 李留忠张勇郭卫东车万里
Owner CHINA PETROLEUM & CHEM CORP