Method for synthesizing adiponitrile

A technology of adiponitrile and n-hexane, applied in organic chemistry, hydrocarbon ammoxidation preparation and other directions, can solve the problems of large power consumption, high equipment requirements, high reaction temperature, etc., and achieves low equipment investment cost, low equipment requirements, The effect of low reaction temperature

Pending Publication Date: 2020-09-15
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among these three methods, the process of butadiene hydrocyanation is complicated, and it needs to consume a large amount of chlorine and hydrocyanic acid, resulting in high production cost and high risk; the adipic acid ammonification method requires expensive raw materials Adipic acid,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: a kind of method for synthesizing adiponitrile, take n-hexane and ammonia as raw materials, oxygen as oxidant, V-Cr-P-O / SiO2 as catalyst, adiponitrile is synthesized in a fluidized bed at 150°C. The volume ratio of n-hexane: oxygen: ammonia is 1:20:3.5. The ratio of the molar amount of V-Cr-P-O / SiO2 catalyst to the volume of n-hexane is 0.04mol / L. After 24 hours of reaction, the yield is 90%, and the purity can reach 96%.

[0016] The operating parameters of the fluidized bed are: fluidization gas inlet velocity: 100-150 cubic / hour; fluidization gas inlet temperature: 150°C; peristaltic pump flow rate: 100-500ml / h; spray atomization air pressure: 0.15-4BAR; spray sample amount: 50-400g / time.

Embodiment 2

[0017] Embodiment 2: a kind of method for synthesizing adiponitrile, take n-hexane and ammonia as raw material, oxygen is oxygenant, V-Cr-P-O / SiO2 is catalyst, synthesizes adiponitrile in 100 ℃ of fluidized beds. The volume ratio of n-hexane: oxygen: ammonia is 1:10:2. The ratio of the molar amount of V-Cr-P-O / SiO2 catalyst to the volume of n-hexane is 0.02mol / L. After 24 hours of reaction, the yield is 82%, and the purity can reach 94%.

[0018] The operating parameters of the fluidized bed are: fluidization gas inlet velocity: 100-150 cubic / hour; fluidization gas inlet temperature: 100°C; peristaltic pump flow rate: 100-500ml / h; spray atomization air pressure: 0.15-4BAR; spray sample amount: 50-400g / time.

Embodiment 3

[0019] Embodiment 3: a kind of method for synthesizing adiponitrile, take normal hexane and ammonia as raw material, oxygen is oxygenant, V-Cr-P-O / SiO2 is catalyst, synthesizes adiponitrile in 200 ℃ of fluidized beds. The volume ratio of n-hexane: oxygen: ammonia is 1:30:5. The ratio of the molar amount of V-Cr-P-O / SiO2 catalyst to the volume of n-hexane is 0.06mol / L. After 24 hours of reaction, the yield is 92%, and the purity can reach 85%.

[0020] The operating parameters of the fluidized bed are: fluidization gas inlet velocity: 100-150 cubic / hour; fluidization gas inlet temperature: 200°C; peristaltic pump flow rate: 100-500ml / h; spray atomization air pressure: 0.15-4BAR; spray sample amount: 50-400g / time.

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Abstract

The invention belongs to the field of chemical synthesis, and particularly relates to a method for synthesizing adiponitrile, wherein n-hexane and ammonia gas are used as raw materials, oxygen is usedas an oxidant, V-Cr-P-O/SiO2 is used as a catalyst, and adiponitrile is synthesized in a fluidized bed at 100-200 DEG C. The adiponitrile prepared by the method disclosed by the invention is cheap inraw material and good in economic effect; the synthesis method is non-toxic in raw materials and high in safety; the reaction temperature is low, the equipment requirement is not high, and the equipment investment cost is low; and the synthesis method does not need a solvent and has high yield.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a method for synthesizing adiponitrile. Background technique [0002] Adiponitrile (ADN) is a very important organic chemical intermediate, mainly used in the preparation of nylon-66. The methods for industrially synthesizing adiponitrile mainly include butadiene hydrocyanation, adipic acid ammoniation dehydration and acrylonitrile electrolytic dimerization. Among these three methods, the process of butadiene hydrocyanation is complicated, and it needs to consume a large amount of chlorine and hydrocyanic acid, resulting in high production cost and high risk; the adipic acid ammonification method requires expensive raw materials Adipic acid requires a high reaction temperature, and solid waste will be generated during the reaction process; the acrylonitrile electrolytic dimerization method requires high equipment requirements, consumes a lot of electric energy, and ...

Claims

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Application Information

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IPC IPC(8): C07C253/24C07C255/04
CPCC07C253/24C07C255/04
Inventor 周鑫宇邹强
Owner TIANJIN UNIV
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