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Reaction system and method for preparing adiponitrile by ammoniation of adipic acid

The technology of a reaction system and an ammoniation reactor, which is applied in the field of adiponitrile preparation, can solve the problems such as difficulty in making breakthrough progress in reaction efficiency, low mass transfer efficiency, affecting reaction efficiency, etc., and achieve the yield of product adiponitrile. And the effect of increasing selectivity, improving reaction efficiency, and improving mass transfer effect

Inactive Publication Date: 2021-05-25
NANJING YANCHANG REACTION TECH RES INST CO LTD
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  • Description
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Problems solved by technology

[0005] In the prior art, the phase boundary area in the reaction process has a greater influence on the volumetric mass transfer coefficient, but the general mass transfer efficiency of reaction devices such as tank reactors, tubular reactors, and tower reactors in the prior art is Low, so it is difficult to make a breakthrough in the reaction efficiency, which affects the reaction efficiency in the reaction process

Method used

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  • Reaction system and method for preparing adiponitrile by ammoniation of adipic acid

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Embodiment

[0069] refer to figure 1 Shown is a reaction system for preparing adiponitrile by ammoniating adipic acid according to an embodiment of the present invention, which includes an ammoniation reactor 100 , a gas-liquid separation tank 300 , and a rectification tower 200 connected in sequence.

[0070] Wherein, the ammoniation reactor 100 is provided with a raw material inlet and a reaction liquid outlet 170 , and the raw material inlet includes an ammonia gas inlet 140 and adipic acid inlet 150 .

[0071] The substances coming out of the ammoniation reactor 100 mainly include adipamide, unreacted raw materials, catalysts, diluents, etc. After entering the gas-liquid separation tank 300, the separated adipamide enters the gas-liquid separation tank 300 from the top of the gas-liquid separation tank 300. Rectification and separation are carried out in the rectification tower 200 , and catalysts, diluents, etc. enter the wiped film evaporator 400 from the bottom of the gas-liquid se...

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Abstract

The invention provides a reaction system and method for preparing adiponitrile by ammoniation of adipic acid. The reaction system comprises an ammoniation reactor, a gas-liquid separation tank and a rectifying tower which are connected in sequence, the ammoniation reactor is provided with a raw material inlet and a reaction feed liquid outlet, the raw material inlet comprises an ammonia gas inlet, the reaction feed liquid outlet is connected with the side wall of the gas-liquid separation tank, and the top of the gas-liquid separation tank is communicated with the rectifying tower. According to the reaction system provided by the invention, the reaction route is optimized, the reaction separation efficiency is improved, and the mass transfer effect of a reaction phase interface is improved, so that the quality and yield of a product are improved.

Description

technical field [0001] The invention relates to the field of adiponitrile preparation, in particular to a reaction system and method for preparing adiponitrile by adipic acid ammoniation. Background technique [0002] Adiponitrile is traditionally used as an intermediate in the production of nylon 66 resin. In recent years, with the development of technology, its application field has been further expanded. It can be processed and synthesized into caprolactam, which can then be used to produce nylon 6 resin. Plasticizers, antioxidants, stabilizers, sterilizers, extractants, bleaching agents, vulcanizing agents, etc., are widely used in coatings, medicines, spices, fuels, electroplating, washing, textile solvents, analytical chemical determinations, etc. [0003] The synthesis process routes of adiponitrile mainly include acrylonitrile (AN) electrolytic dimerization method, butadiene (BD) method, adipic acid (ADA) catalytic amination method and caprolactam method. Among the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C253/22C07C253/34C07C255/04
CPCC07C253/22C07C253/34C07C255/04
Inventor 张志炳周政孟为民王宝荣杨高东罗华勋张锋李磊杨国强田洪舟曹宇
Owner NANJING YANCHANG REACTION TECH RES INST CO LTD
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