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Production system and method of 1, 2-cyclohexanediamine

A production system and technology of cyclohexamethylenediamine, applied in chemical instruments and methods, preparation of organic compounds, preparation of amino compounds, etc., can solve the problems of short supply and high market price of hexamethylenediamine, reduce production costs and avoid side effects The effect of the product

Pending Publication Date: 2021-08-13
CHONGQING HUAFON CHEM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the output of hexamethylenediamine is often in short supply, resulting in a higher market price of hexamethylenediamine

Method used

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  • Production system and method of 1, 2-cyclohexanediamine

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]The production system of 1,2-cyclohexamine includes solid liquid separation devices 1, a dehydrated tower 2, a defocolate tower 3, a refining tower 4, wherein the solid-liquid separation device is a decormerizer. The material inlet of the solid solution separation device 1 is used to connect with the gas-liquid separation, catalyst filtration, and desiration of the reactor, and in this example, the reactor 11, flash tank 12, filtration The device 13, the reactor 11, the reactor 11, is a gas-liquid solid three-phase fluidized bed reactor, and the bottom portion of the reactor 11 is provided, and the top of the reactor 11 is disposed, and the flashed can 12, Connected to the inlet of the filter 13, the outlet of the filter 13 is supplied to the desalcoholic tower 14 through the third conduit 103, and the third conduit 103 is provided with a desirate feed pump 15, the deslend hydr. 14 The bottom discharge port is connected to the material inlet of the solid-liquid separation de...

Embodiment 2

[0036] The method of producing 1,2-cyclohexameamine is produced using the production system of Example 1, including the following steps:

[0037] 1) Premixed by adiponitrile, ethanol solution, sodium hydroxide, and catalyst, with excess of hydrogen from the bottom of the reactor. Hexonitrile, ethanol, catalyst, and sodium hydroxide are 95: 45: 2: 1.0, and hydrogenation is carried out under 65-80 ° C, wherein the ethanol is used as a solvent, and sodium hydroxide is auxiliary agent to obtain a mixture. liquid;

[0038] 2) The mixed liquid is buffered by the first buffer tank. After the speed is slowed down, the flash tank is entered, and the excess of hydrogen is removed, for recovery, the mixed liquid removed from hydrogen enters the second buffer tank, stirred, cooling to 60 ° C Enter the filter, maintain a filter pressure of 350kpAg, filter the catalyst in the mixture, enter the third buffer tank, buffer, slow down, heat exchange with the tower of the desorbitant column, heat To...

Embodiment 3

[0044] The method of producing 1,2-cyclohexameamine is produced using the production system of Example 1, including the following steps:

[0045] 1) Premixed by adiponitrile, ethanol solution, sodium hydroxide, and catalyst, with excess of hydrogen from the bottom of the reactor. Hexonitrile, ethanol, catalyst, and sodium hydroxide have a hydrogenation reaction under 65-80 ° C, wherein the ethanol is used as a solvent, and sodium hydroxide is auxiliary agent to obtain a mixture. liquid;

[0046] 2) The mixed liquid is buffered by the first buffer tank, after the speed is slowed down, remove the flash tank, remove the excess hydrogen, for recovery, the mixture removed from hydrogen into the second buffer can, stir, and cool down to 65 ° C Enter the filter, keep the filter pressure of 400kpAg, filter the catalyst in the mixture, enter the third buffer can, buffer, slow down, heat exchange with the tower of the desorbitant tower, heat To 75 ° C, the reboiler entered into the desalcoh...

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Abstract

A production system of 1, 2-cyclohexanediamine comprises a solid-liquid separation device, a dehydrating tower, a decoking tower and a refining tower. A material inlet of the solid-liquid separation device is used for being connected with a mixed material source which is discharged by a reactor and subjected to gas-liquid separation, catalyst filtration and dealcoholization. The solid-liquid separation device supplies materials to the dehydrating tower through an overflow pipe. A tower bottom discharge hole of the dehydrating tower supplies materials to the decoking tower through a first pipeline. A tower top discharge hole of the decoking tower supplies materials to the refining tower through a second pipeline. A tower top discharge hole of the refining tower is connected with a return pipeline through a condenser. A return tank, a discharge pump and a first valve are sequentially arranged on the return pipeline. The downstream end of the return pipeline is connected with a return port of the refining tower, a discharge pipe is connected to the return pipeline and located between the discharge pump and the first valve, and a second valve is arranged on the discharge pipe. The system is simple in structure and convenient to operate, can continuously and stably produce 1, 2-cyclohexanediamine products, and meets the actual requirements of chemical enterprises.

Description

Technical field [0001] The present invention relates to the field of chemical industry, and more particularly to a production system and method of 1,2-cyclohexamethylamine. Background technique [0002] As an important chemical raw material, hexiamine is used to prepare products such as Nylon 66 and Nylon 610 and other reactions to adipic acid, sunflower diacid, and made a variety of nylon resins, nylon fibers and engineering plastics. However, the yield of hexametine is often in a state of supply, resulting in a higher market price of hexamethiamine. [0003] 1,2-cyclohexamethylene is similar to the structure of hexamenia. 1,2-cyclohexamethylene can be used instead of hexamine as a raw material, and can be used for curing agents, water treatment agents, and the like, and can be used as a pharmaceutical intermediate and a plurality of chiral synthetic reagents. Specific uses include bridge shedowed epoxy waterproof adhesive, high-speed rail concrete repair epoxy adhesive, oil sup...

Claims

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Application Information

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IPC IPC(8): C07C211/36C07C209/48C07C209/86C07C209/84
CPCC07C209/48C07C209/86C07C209/84C07C2601/14C07C211/36
Inventor 陈恩之陈东生张银杏赵风轩王志远李宁张楠张传礼
Owner CHONGQING HUAFON CHEM
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