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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 demethylation by-products. Therefore, it is necessary to develop an aromatic Catalysts for preparing alicyclic amines from amines and their preparation methods are still of great significance

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

Embodiment 1

[0068] (1') At room temperature, 0.5132g of RuCl 3 ·3H 2 O was dissolved in 100mL deionized water to obtain a ruthenium source solution, and activated alumina was immersed in the ruthenium source solution and stirred for 10min, and then immersed for 12h. The volume ratio of the quality of the activated alumina to the ruthenium source solution was 0.05g / mL, After filtering, the precipitate was washed and filtered with deionized water and ethanol, dried at 100°C for 12h, calcined at 400°C for 5h under an air atmosphere, and then under a mixed atmosphere of hydrogen and nitrogen (wherein the volume percentage of hydrogen was 10%) , Reduction activation at 250°C for 6h;

[0069] (2') disperse the reductively activated product of step (1') in 100mL water to obtain a dispersion;

[0070] (3') Lithium hydroxide is added in the dispersion liquid of step (2'), the addition of described lithium hydroxide makes the mass percentage composition of lithium hydroxide in the obtained cataly...

Embodiment 2

[0073] This example uses the catalyst in Example 1, the only difference being that m-xylylenediamine is replaced by p-phenylenediamine during the performance test, and other conditions are exactly the same as those in Example 1.

Embodiment 3

[0075] This example uses the catalyst in Example 1, the only difference being that m-xylylenediamine is replaced by diaminodiphenylmethane during the performance test, and other conditions are exactly the same as those in 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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