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Catalyst system and method for catalytically synthesizing 1, 6-hexamethylenediamine by using catalyst system

A catalyst, hexamethylenediamine technology, applied in chemical instruments and methods, preparation of organic compounds, physical/chemical process catalysts, etc. Restrictions and other problems, to achieve the effect of easy industrial production and simple production process

Active Publication Date: 2021-11-26
河南平煤神马尼龙工程技术有限公司 +1
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the current limited source of adiponitrile, the domestic production of 1,6-hexamethylenediamine has high technical costs and complicated routes. This technical problem, the present invention proposes a A catalyst system and a method for catalytically synthesizing 1,6-hexamethylenediamine, the invention has a simple production process and is convenient for industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0034] In terms of parts by mass, 100 parts of silicon dioxide (300 mesh), 30 parts of tris-(diphenylphosphinemethyl)chlorosilane, and 50 parts of toluene were reacted at 50°C for 2 hours, filtered, and the solid was vacuum-dried. A tridentate phosphine ligand (I) supported on silica was obtained.

preparation example 2

[0036] In parts by mass, 50 parts of silicon dioxide (400 mesh), 40 parts of tri-(di-tert-butylphosphinemethyl)chlorosilane, and 50 parts of toluene were reacted at 60°C for 2 hours, filtered, and the solid was dried in vacuum , to obtain the tridentate phosphine ligand (II) supported on silica.

preparation example 3

[0038] In terms of parts by mass, 150 parts of silicon dioxide (200 mesh), 50 parts of tris-(diethylphosphinomethyl)chlorosilane, and 100 parts of toluene were reacted at 40°C for 3 hours, filtered, and the solid was vacuum-dried , to obtain a silica-supported tridentate phosphine ligand (III).

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Abstract

The invention relates to the field of chemical synthesis, and provides a catalyst system and a method for catalytically synthesizing 1, 6-hexamethylenediamine by using the catalyst system, and aims to solve the technical problems that the source of adiponitrile is limited at present, the technical cost of domestic production of 1, 6-hexamethylenediamine is high, and the route is tedious. The catalyst system comprises a catalyst and a silica-supported ligand. The method comprises the following steps: adding caprolactam, alkali and water into a reaction kettle, and carrying out heating hydrolysis to obtain 6-aminocaproate; and then respectively adding the solvent, the organic sulfonic acid, the catalytic system and the ammonia water into the reaction kettle, continuously introducing hydrogen, heating under the pressure of 10-20 bar, reacting, and rectifying to obtain the 1, 6-hexamethylenediamine. The preparation method is simple in process and convenient for industrial production.

Description

technical field [0001] The invention relates to the field of chemical synthesis, in particular to a catalyst system and a method for catalytically synthesizing 1,6-hexamethylenediamine. Background technique [0002] 1,6-Hexamethylenediamine is a very important basic chemical raw material, which is mainly used in the preparation of polymer materials such as polyamides. For example, it is used to synthesize nylon series products, including nylon 66, nylon 69, nylon 610, nylon 612, etc.; to produce diisocyanate; it can also be used as curing agent and crosslinking agent for epoxy resin and urea-formaldehyde resin. In recent years, the domestic demand for 1,6-hexanediamine has increased year by year, and the explosive growth period of the nylon industry is coming. [0003] There are three main methods for industrial production of 1,6-hexanediamine: one is the catalytic hydrogenation of adiponitrile; the other is the amination of adipaldehyde; the third is the amination of hexan...

Claims

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Application Information

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IPC IPC(8): B01J31/24C07C211/12C07C209/22C07C227/12C07C229/08
CPCB01J31/24C07C209/22C07C227/12B01J2531/847B01J2531/845B01J2531/824B01J2531/821C07C211/12C07C229/08
Inventor 朱宏志李志芳代士凯黄卫中袁军伟王立亮
Owner 河南平煤神马尼龙工程技术有限公司
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