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Method for synthesizing diisobutylamine, catalyst and catalyst preparation method

A technology of diisobutylamine and catalyst is applied in the field of chemical industry to achieve the effects of high activity, reduction of preparation cost and process requirements, and reduction of roasting temperature requirements

Active Publication Date: 2021-08-10
ZHEJIANG JIANYE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But do not disclose in the above-mentioned document, improve the specific technical scheme of diisobutyl selectivity

Method used

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  • Method for synthesizing diisobutylamine, catalyst and catalyst preparation method

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Experimental program
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Effect test

Embodiment 1

[0025] The invention discloses a catalyst for synthesizing diisobutylamine, and the catalyst is used in the synthesis method of synthesizing diisobutylamine through amination reaction of isobutanol. The mass percent composition of the catalyst is as follows: 15% of cobalt salt active component, 0.5% of hydrophilic nano material modifier, and 84.5% of alumina carrier.

[0026] The preparation method of the catalyst is a two-step impregnation method.

[0027] The steps of a kind of preparation method of present embodiment catalyst are as follows:

[0028] Step 1, according to the mass of the catalyst to be prepared, weigh cobalt salt with a mass percentage of 15%, disperse and dissolve it in deionized water, stir it evenly, and prepare an impregnating solution;

[0029] Step 2, impregnate the prepared impregnating solution and the activated alumina carrier with a mass percentage of 84.5% of the catalyst to be prepared according to the equal volume impregnation method, and impre...

Embodiment 2

[0043] The invention discloses a catalyst for synthesizing diisobutylamine, and the catalyst is used in the synthesis method of synthesizing diisobutylamine through amination reaction of isobutanol. The mass percent composition of the catalyst is: 45% of cobalt salt active component, 10% of hydrophilic nano material modifier, and 45% of alumina carrier.

[0044] The preparation method of the catalyst is a two-step impregnation method.

[0045] The steps of a kind of preparation method of present embodiment catalyst are as follows:

[0046] Step 1, according to the mass of the catalyst to be prepared, weigh 45% by mass of cobalt salt, disperse and dissolve it in deionized water, stir it evenly, and prepare an impregnating solution;

[0047] Step 2, impregnate the prepared impregnating solution and the active alumina carrier with a mass percentage of 45% of the mass of the catalyst to be prepared according to the equal volume impregnation method, and impregnate at 60°C for 5 ho...

Embodiment 3

[0061] The invention discloses a catalyst for synthesizing diisobutylamine, and the catalyst is used in the synthesis method of synthesizing diisobutylamine through amination reaction of isobutanol. The mass percent composition of the catalyst is: 30% of cobalt salt active component, 7% of hydrophilic nano material modifier, and 63% of alumina carrier.

[0062] The preparation method of the catalyst is a two-step impregnation method.

[0063] The steps of a kind of preparation method of present embodiment catalyst are as follows:

[0064] Step 1, according to the mass of the catalyst to be prepared, weigh 30% by mass of cobalt salt, disperse and dissolve it in deionized water, stir it evenly, and prepare an impregnating solution;

[0065] Step 2, impregnate the prepared impregnating solution and the active alumina carrier with a mass percentage of 63% of the catalyst to be prepared according to the equal volume impregnation method, and impregnate at 60°C for 5 hours, and dry ...

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Abstract

The invention discloses a synthesis method of diisobutylamine, which has the advantages of high selectivity of diisobutylamine, low cost, high yield, safety and environmental friendliness. The invention also discloses a catalyst and a preparation method of the catalyst. The method comprises the following steps: vaporizing isobutanol and ammonia, carrying out an ammonification reaction in the presence of hydrogen through a fixed bed reactor filled with a Co catalyst, and carrying out distillation separation after the reaction to obtain synthetic diisobutylamine. According to the method, the reaction pressure is 0.5-3 MPa, the reaction temperature is 100-250 DEG C, the molar ratio of alcohol to ammonia to hydrogen is (1-5): 1: (2-4), and the alcohol feeding space velocity is 0.1-0.8 h <-1 >. The method for synthesizing diisobutylamine is high in conversion rate, high in selectivity, low in cost, good in safety and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for synthesizing an organic compound diisobutylamine, a catalyst and a method for preparing the catalyst. Background technique [0002] Diisobutylamine is an important chemical intermediate for the synthesis of some pesticides and rubber accelerators, such as the pesticide butachlorate and the rubber accelerator diisobutylthiuram disulfide. [0003] The traditional methods for preparing diisobutylamine are as follows: ①Using the reaction route of chloroisobutane and ammonia liquid phase, and then reducing the organic amine with a strong base. ② It is obtained by condensation hydrolysis of bromoisobutane and p-benzenesulfonamide, and neutralization with strong alkali. ③ Ammonification and hydrogenation of isobutyraldehyde, using noble metals as catalysts, and adjusting the ratio of ammonia to aldehyde can prepare different proportions of isobutylamine, diisobut...

Claims

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Application Information

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IPC IPC(8): B01J23/75B01J37/02B01J37/08C07C209/16C07C211/07
CPCC07C209/16B01J23/75B01J37/0213B01J37/082B01J35/23C07C211/07
Inventor 钟九生李东王爱艳张金霞龚成菊齐庆辰郑丰平
Owner ZHEJIANG JIANYE CHEM
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