Catalyst for preparing alicyclic amine from aromatic amine as well as preparation method and application of catalyst

A catalyst and a technology for aromatic amines, which are applied in the field of aromatic amines for preparing alicyclic amines, catalysts and their preparation, can solve the problems of low selectivity and harsh reaction conditions, and achieve the effects of high selectivity, simple preparation process and easy industrial application.

Inactive Publication Date: 2021-03-12
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In summary, the catalysts disclosed in existing patents generally have the disadvantages of low selectivity, harsh reaction conditions, and relatively high deamination and demeth

Method used

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  • Catalyst for preparing alicyclic amine from aromatic amine as well as preparation method and application of catalyst
  • Catalyst for preparing alicyclic amine from aromatic amine as well as preparation method and application of catalyst
  • Catalyst for preparing alicyclic amine from aromatic amine as well as preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0067] Example 1

[0068] (1 ') At room temperature, 0.5132 g of RUCL 3 · 3h 2 O dissolve in 100 ml of deionized water to give a ruthenium source solution, and the activated alumina is immersed in a ruthenium source solution for 10 min, and then impregnated 12h, the mass ratio of the active alumina and the volume ratio of the ruthenium source solution is 0.05 g / ml, After the filtration, the precipitate was washed with ionized water and ethanol, dried at 100 ° C for 12 h, and calcined at 400 ° C under the air atmosphere for 5 h, after the mixed atmosphere of hydrogen and nitrogen (in which the hydrogen volume percentage content was 10%) , Reduced by 250 ° C for 6 h;

[0069] (2 ') Disperse the reducing product of step (1') is dispersed in 100 ml of water to obtain a dispersion;

[0070] (3 ') Add lithium hydroxide in the dispersion of step (2'), the addition of lithium hydroxide is added such that the mass content of lithium hydroxide in the obtained catalyst is 25%, stirred 24 h...

Example Embodiment

[0072] Example 2

[0073] In this example, the catalyst in Example 1 differs only to replace the amphilomethylamine in the performance test, and the other conditions are identical to Example 1.

Example Embodiment

[0074] Example 3

[0075] The present embodiment employs the catalyst in Example 1. The difference is only to replace the interposed diomethynamine in the performance test, and other conditions are identical to Example 1.

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Abstract

The invention relates to a catalyst for preparing alicyclic amine from aromatic amine as well as a preparation method and application of the catalyst. The catalyst comprises a carrier, and an active component and an auxiliary agent which are loaded on the carrier, wherein the active component is ruthenium, the auxiliary agent is an alkali metal modifier, and the carrier is aluminum oxide. According to the invention, the catalyst uses alumina as the catalyst carrier, ruthenium as the active component and the alkali metal modifier as the auxiliary agent, and the synergistic effect among alumina,ruthenium and the alkali metal modifier significantly improves the reaction activity of the catalyst; and when the catalyst is used for catalyzing aromatic amine to prepare alicyclic amine, catalyticreaction conditions are mild, and high temperature and high pressure are not needed, so the cost of the process of preparing alicyclic amine from aromatic amine is obviously reduced.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a catalyst for preparing alicyclic amines from aromatic amines, a preparation method and application thereof. Background technique [0002] As important organic chemical and fine chemical intermediates, alicyclic amines are widely used in the fields of rubber additives, food additives, pharmaceuticals, anti-corrosion, papermaking, plastic processing and textiles, and are also important raw materials for the synthesis of isocyanates. Because the alicyclic isocyanate structure does not contain benzene rings, it is stable to light and can be used to prepare non-yellowing polyurethane products. With the increasing variety of polyurethane products and higher quality requirements, the demand for cycloaliphatic isocyanate is increasing, so the development of production of cycloaliphatic amines has become a top priority. [0003] In the patent US5371293 applied by Mitsubishi Gas in 1994, 5% sup...

Claims

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Application Information

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IPC IPC(8): B01J23/58B01J27/232C07C209/72C07C211/18C07C211/36
CPCB01J23/58B01J27/232C07C209/72C07C2601/14C07C211/18C07C211/36
Inventor 王利国杨延米韩风刚李会泉贺鹏曹妍
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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