Catalyst for production of tert-butylamine as well as preparation method and application of catalyst

A catalyst, the technology of tert-butylamine, which is applied in the field of catalysts for the production of tert-butylamine and its preparation, can solve the problems of low conversion rate in a single pass of amination, and achieve the effects of improved service life, high activity, and increased layer spacing

Active Publication Date: 2015-04-22
NANTONG FINC PHARMA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned patented technologies all have the disadvantage of low single-pass conversion rate of amination. If the single-pass conversion rate of direct catalytic amination can be improved to reduce the consumption of public works, reduce the reaction pressure to reduce equipment cost investment, then direct catalytic amination will be more efficient. Has an economic advantage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The fluorine-modified Ni-containing hydrotalcite-like product was prepared according to the preparation method described in the literature, with a pore size of 10 nm and a specific surface area of ​​77 m 2 / g; the mass percentages of Ni, Mg, F and Al are 23%, 17%, 3% and 57% respectively. Gadolinium chloride, praseodymium chloride, industrial grade, produced by Jining Zhongkai New Materials Co., Ltd.;

[0021] ZSM-5 molecular sieve, silicon aluminum ratio = 25, specific surface area 340m 2 / g, pore volume 0.17ml / g, produced by Shandong Qilu Huaxin Hi-Tech Co., Ltd.,

[0022] 1).Activation of fluorine-modified Ni-containing hydrotalcites

[0023] Move the fluorine-modified Ni-containing hydrotalcite into a tubular electric furnace, flow nitrogen at a flow rate of 10L / h, and raise the temperature from room temperature to 800°C at a rate of 80°C / h, and switch nitrogen to 5L / h after reaching the temperature flow of water vapor and activation treatment for 5 hours, the pr...

Embodiment 2

[0028] Gadolinium chloride content is adjusted to 7% in step 2, and other is with embodiment 1. The resulting product number was M-2. The catalyst composition is as follows: 93.85% by mass of fluorine-modified Ni-containing hydrotalcite, 5.9% of gadolinium chloride, and 0.25% of praseodymium chloride.

Embodiment 3

[0030] Gadolinium chloride content is adjusted to 10% in step 2, and other is with embodiment 1. The resulting product number was M-3. The catalyst composition is as follows: 91.33% by mass of fluorine-modified Ni-containing hydrotalcite, 8.4% of gadolinium chloride, and 0.27% of praseodymium chloride.

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Abstract

The invention provides a catalyst for production of tert-butylamine as well as a preparation method and an application of the catalyst. A fluorine-modified Ni-containing hydrotalcite-like compound adopting a mesoporous structure is taken as a carrier, after activation by vapor, the hydrotalcite-like compound is used for carrying gadolinium chloride and / or praseodymium chloride with a liquid phase sedimentation method, and then the catalyst product is produced through drying. The specific aperture and the shape selectivity of the catalyst product are very effective on inhibiting side reactions, and the carried gadolinium chloride / praseodymium chloride provides L acidic active sites for the catalyst. Under the low pressure condition, the higher isobutylene conversion per pass can also be maintained if the catalyst is applied to a reaction for preparing the tert-butylamine through direct amination of isobutylene and ammonia, the catalyst can still keep higher activity after long-term operations, and the service life of the catalyst can be prolonged.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a catalyst for producing tert-butylamine, a preparation method and application thereof. technical background [0002] Tertiary butylamine (TBA) is a kind of important organic synthesis intermediate, is widely used in synthetic rubber accelerator, medicine, insecticide, bactericide, herbicide, dye colorant, lubricating oil additive etc. Due to the particularity of its molecular structure, TBA is difficult to synthesize. Although it was first produced in 1895, it was not until the 1940s that isobutylene (IBE) and urea synthesized tert-butylamine, and IBE and nitrile synthesized tert-butylsulfonamide were developed successively, which laid the foundation for the industrial production of tert-butylamine (TBA). [0003] CN1436768 discloses a method for preparing tert-butylamine. Tert-butylamine is prepared by direct amination of isobutene and ammonia in the presence of a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/10C07C209/60C07C211/03
Inventor 张玲
Owner NANTONG FINC PHARMA CHEM
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