Catalyst for catalytic hydrogenolysis of unsym-dimethylhydrazine and its prepn

A dimethylhydrazine catalyzed hydrogen and catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. High volume, air pollution and other issues

Inactive Publication Date: 2004-02-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its handling is a very difficult problem
Due to the high nitrogen content of unsymmetrical dimethylhydrazine, a large amount of NO will be produced when burned as fuel x , causing severe air pollution
And because unsymmetrical dimethylhydrazine is flammable, explosive, and poisonous, it is also difficult to transport it to the production plant for long-distance treatment.
But have not yet retrieved the catalyst and preparation method thereof that can effectively hydrogenolyze unsymmetrical dimethylhydrazine

Method used

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  • Catalyst for catalytic hydrogenolysis of unsym-dimethylhydrazine and its prepn

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] Weigh 49.72 grams of silicon dioxide as a carrier, prepare an aqueous solution containing 0.51 grams of rhodium chloride and 0.0514 grams of ruthenium trichloride, and use the prepared aqueous solution of silicon dioxide to stand, and then dry at 120°C. Then, it was reduced under hydrogen flow at 300°C to obtain a catalyst. Example 2

example 2

[0017] Weigh 48.75 grams of aluminum oxide support, prepare an aqueous solution containing 2.032 grams of rhodium chloride and 1.24 grams of nickel nitrate hexahydrate, impregnate the support with the prepared solution, place it, then dry it at 120°C and roast at 300°C. Then the catalyst was prepared by reduction at 400°C under hydrogen flow. Example 3

example 3

[0018] Weigh 48.5 grams of silicon dioxide as a carrier, configure an aqueous solution containing 2.032 grams of rhodium trichloride and 1.34 grams of chloroiridic acid, impregnate the silicon dioxide with the configured aqueous solution, let it stand, and then dry it at 120°C and roast at 400°C. Then, the catalyst was prepared by reduction at 300°C under hydrogen flow. Example 4

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PUM

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Abstract

THe catalyst for catalytic hydrogenolysis of unsym-dimethylhydrazine (UDMH) is one kind of improved loaded rhodium catalyst. The improved catalyst has added assistant, which is VIII element and alkali metal oxide. With the said improved catalyst and in the reaction conditions including temperature 100-300 deg.C, normal pressure, molar ratio between H2 and UDMH 1-10 and UDMH liquid space velocity 0.5-8 ml / ml catalyst, Hr, UDMH is converted to produce dimethylamine and ammonia. The said catalyst has simple preparation process, high reaction conversion rate and makes it possible to minimize the reaction apparatus.

Description

technical field [0001] The invention provides a catalyst and method for producing ammonia and dimethylamine by catalytic hydrogenolysis of unsymmetrical dimethylhydrazine. Background technique [0002] 1,1-Dimethylhydrazine, also known as unsymmetrical dimethylhydrazine, is a colorless liquid with a pungent odor. In the air, unsymmetrical dimethylhydrazine is easily oxidized slowly and turns yellow. At present, unsymmetrical dimethylhydrazine is mainly produced by the chloramine method, using sodium hypochlorite, ammonia water and dimethylamine as raw materials. [0003] <chemistry num="001"> <chem file="01131291_cml001.xml" / > < / chemistry> [0004] The main use of unsymmetrical dimethylhydrazine is as a rocket propellant. Long-term storage of unsymmetrical dimethylhydrazine will be slowly oxidized by air to form a part of hydrazone. [0005] <chemistry num="002"> <chem file="01131291_cml002.xml" / > < / chemistry> Such oxidized UDM...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/46C07C209/42C07C211/03C07C211/04
Inventor 林培滋丁云杰罗洪原
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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