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Hexamethylenediamine synthesis system

A technology of hexamethylenediamine and material mixing, which is applied in the preparation of amino compounds, the preparation of organic compounds, and the purification/separation of amino compounds. It can solve problems such as increasing misoperation, affecting production stability, and increasing bypasses.

Active Publication Date: 2019-01-25
CHONGQING HUAFON CHEM +2
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Problems solved by technology

However, this method does not fundamentally solve the clogging problem of the reaction system directly, but instead increases the risk of misoperation in production due to the addition of bypasses, which affects the stability of production

Method used

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  • Hexamethylenediamine synthesis system

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Embodiment Construction

[0032] see figure 1 , is a specific example of a hexamethylenediamine synthesis system. The hexamethylenediamine synthesis system includes a feeder 1 and a reactor 2. In this embodiment, the feeder 1 includes a feed mixer 1a and a feed pump 1b. Both the feed mixer and the feed pump are conventional in the chemical industry. Commonly used feed mixing equipment. Wherein, the feeding end of feed mixer 1a is used to be respectively connected with catalyst source, adiponitrile source, ethanol source, sodium hydroxide solution source, wherein adiponitrile is one of addition raw materials, and sodium hydroxide solution provides The environmental carrier for the addition of adiponitrile and hydrogen, ethanol is mainly used as an additive to prevent pipeline blockage and promote the smooth and efficient addition reaction. The discharge end of the feed mixer 1a is connected with the material mixing pipeline 4 through the feed pump 1b. The reactor 2 includes a distributor 3, a number ...

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Abstract

A hexamethylenediamine synthesis system comprises a feeder, a reactor and a distributor, wherein the reactor comprises a plurality of material mixing pipelines, a plurality of material synthesis pipelines and a separator, an inner cavity of the separator comprises a gas-liquid separation zone, a liquid-solid separation zone and a conical sedimentation zone, a material mixing device is arranged ineach material mixing pipeline, and the feeder is connected with the material mixing pipelines. The upper end of each material mixing pipeline is communicated with the gas-liquid separation zone, the lower end of each material mixing pipeline is communicated with the feeding end of the distributor, and each material synthesis pipeline is wrapped with a cooling medium jacket. A spiral mixing deviceis arranged in each material synthesis pipeline, the upper end of each material synthesis pipeline is communicated with the gas-liquid separation zone and located above the corresponding material mixing pipeline, and the lower end of each material synthesis pipeline is communicated with the discharging end of the distributor. A hydrogen inlet is formed in each material synthesis pipeline, an exhaust pipeline is arranged at the top of the gas-liquid separation zone, the liquid-solid separation zone is provided with a hexamethylenediamine discharge pipeline, and the conical sedimentation zone iscommunicated with the feeding end of the distributor through a return pipeline.

Description

technical field [0001] The invention relates to the technical field of hexamethylenediamine production, in particular to a synthesis system of hexamethylenediamine. Background technique [0002] Hexamethylenediamine is an important chemical intermediate, mainly used in the synthesis of nylon-66 salt, nylon 610 and 1,6-hexamethylene diisocyanate, etc. These products are used to make fibers, resins, engineering plastics, and are widely used in Textile leather, architectural coatings, machinery manufacturing and other fields. [0003] At present, the production methods of hexamethylenediamine mainly include hydrogenation of adiponitrile, namely NC(CH 2 ) 4 CN+4H 2 →H 2 N(CH 2 ) 6 NH 2 , the method is divided into high-pressure method and low-pressure method according to the pressure required for the reaction. The high-pressure method generally refers to the catalytic action of adiponitrile and hydrogen on a low-priced iron-based or cobalt-copper catalyst in a high-pressu...

Claims

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Application Information

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IPC IPC(8): B01J8/18B01J8/08B01J8/00C07C209/48C07C209/84C07C211/12
CPCB01J8/0015B01J8/0045B01J8/0055B01J8/08B01J8/18C07C209/48C07C209/84C07C211/12
Inventor 陈恩之赵风轩徐淑媛谢毅李子英张楠张艾民陈发挥李全董成苓刘新安孟启贵
Owner CHONGQING HUAFON CHEM
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