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Catalyst for synthesizing monoethylamine, preparation method and application

A technology of catalyst and ethylamine, which is applied in the field of industrial catalysts, can solve the problem of low selectivity of monoethylamine, and achieve the effects of industrial production, controllable process, and small amplification effect

Active Publication Date: 2020-12-08
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies and defects of the prior art, the present invention provides a catalyst, preparation method and application for synthesizing monoethylamine, which solves the existing problems The catalyst for synthesizing monoethylamine has the problem of low selectivity of monoethylamine when synthesizing monoethylamine

Method used

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  • Catalyst for synthesizing monoethylamine, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Add 50g of cobalt nitrate hexahydrate into 600mL of water and 600mL of ethanol for ultrasonic dissolution, and then use a compression atomizer to slowly spray the solution at 5KPa into a rotary evaporator equipped with 33.5g of gamma alumina balls with a diameter of Ф2mm. And rotate forward and reverse at a speed of 50r / min, switch between forward and reverse for 3s, then evaporate the solvent at 80°C, take it out and dry it at 60°C.

[0043] Using the same operation, spray ethanol and aqueous solution containing 0.35g of palladium acetate and ethanol and aqueous solution containing 0.05g of ammonium perrhenate in sequence, and dry the obtained solid at 350°C for 8 hours to obtain Co-Pd-Re / Al 2 o 3 Catalyst, denoted as Catalyst I.

[0044] X-ray fluorescence analysis was performed on the catalyst I obtained in this example. The catalyst contained 23.03% Co, 0.31% Pd and 0.08% Re, indicating that the catalyst was Co, Pd, and Re deposited on the surface of alumina.

Embodiment 2

[0046] Add 48g of cobalt nitrate hexahydrate into 600mL of water and 600mL of ethanol for ultrasonic dissolution, and then use a compression atomizer to slowly spray the solution at 5KPa into a rotary evaporator equipped with 30g of gamma alumina balls with a diameter of Ф3mm, and Rotate forward and reverse at a speed of 20r / min, switch between forward and reverse for 5s, then evaporate the solvent at 70°C, take it out and dry it at 60°C.

[0047] Using the same operation, spray ethanol and aqueous solution containing 1.95g of palladium nitrate dihydrate and ethanol and aqueous solution containing 0.03g of ammonium perrhenate in sequence, and dry the obtained solid at 350°C for 4 hours to obtain Co-Pd- Re / Al 2 o 3 Catalyst, denoted as Catalyst II.

[0048] According to X-ray fluorescence analysis, the catalyst is the same as in Example 1, and Co, Pd and Re are also deposited on the surface of alumina.

Embodiment 3

[0050] Add 55g of cobalt nitrate hexahydrate into 600mL of water and 600mL of ethanol for ultrasonic dissolution, and then use a compression atomizer to slowly spray the solution at 5KPa into a rotary evaporator equipped with 35g of gamma alumina balls with a diameter of Ф2mm, and Rotate forward and reverse at a speed of 50r / min, switch between forward and reverse for 3s, then evaporate the solvent at 80°C, take it out and dry it at 60°C.

[0051] Using the same operation, spray ethanol containing 1.17g of palladium chloride, aqueous solution, and ethanol and aqueous solution containing 0.26g of rhenium chloride in sequence. After drying, the obtained solid is roasted at 500°C for 4 hours to obtain Co-Pd-Re / al 2 o 3 Catalyst, denoted as catalyst III.

[0052] According to X-ray fluorescence analysis, the catalyst is the same as in Example 1, and Co, Pd and Re are also deposited on the surface of alumina.

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Abstract

The invention discloses a catalyst for synthesizing monoethylamine as well as a preparation method and application thereof. The catalyst comprises aluminum oxide particles and cobalt, palladium and rhenium deposited on the surfaces of the aluminum oxide particles. Cobalt accounts for 10%-40% of the total mass of the catalyst, palladium accounts for 0.5%-5% of the total mass of the catalyst, and rhenium accounts for 0.1%-1% of the total mass of the catalyst. The catalyst is prepared by adopting a spraying method. By adopting the catalyst provided by the invention, when monoethylamine is prepared through hydroamination of ethanol, the monoethylamine selectivity is greater than or equal to 86%(the conversion rate is greater than or equal to 61%, and the ethylamine selectivity is greater thanor equal to 99.9%), the advantages are obvious, and the catalyst has relatively high industrial application value.

Description

technical field [0001] The invention belongs to the technical field of industrial catalysts, and in particular relates to a catalyst for synthesizing monoethylamine, a preparation method and an application. Background technique [0002] Ethylamine, including monoethylamine, diethylamine and triethylamine, is an important organic intermediate and is widely used in the fields of pesticides, medicines, dyes, rubber, water treatment, adhesives and catalysts. Among them, Ethanamine or Monoethylamine is mainly used as rubber additives, extractants, emulsifiers, detergents, insecticides, herbicides, mineral dressing agents, pharmaceutical raw materials and reagents, and is also widely used in dyes, surface active In the production of additives, antioxidants, preservatives, lubricating oils and rocket propellants and fuels. [0003] At present, the synthesis of monoethylamine mainly includes ethyl chloride ammonolysis method, acetonitrile reduction method and ethanol hydroamination...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J37/02C07C209/16C07C211/05
CPCB01J37/0215B01J23/8986C07C209/16C07C211/05
Inventor 张前吕剑杨建明余秦伟王为强袁俊惠丰李佳霖赵锋伟梅苏宁李亚妮
Owner XIAN MODERN CHEM RES INST
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