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Preparation method of uranium-based catalyst, catalyst prepared from uranium-based catalyst and application of uranium-based catalyst in preparation of chlorine through oxidation of hydrogen chloride

A catalyst and hydrogen chloride technology, applied in the direction of chlorine/hydrogen chloride, preparation with chloride, chemical instruments and methods, etc., can solve the problems of pollution, loss of radioactive uranium elements, etc., and achieve the effect of avoiding agglomeration, low price and high conversion rate

Active Publication Date: 2021-04-20
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned problems existing in the prior art, the object of the present invention is to provide a preparation method of a uranium-based catalyst, the catalyst thus prepared has the advantages of high activity, good stability, low cost, etc., and can solve the problem of radioactive uranium. The pollution problem caused by the loss

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) Catalyst preparation:

[0056] 1) MOF(Cr) / Al 2 o 3 Preparation of composite material precursor A: Weigh 4gCr(NO 3 ) 3 9H 2 O was dissolved in 40mL of deionized water, 1.6g of terephthalic acid was added, 20g of pseudoboehmite powder was added to it, stirred for 15min, the reactants were put into a self-pressure reactor, and reacted at a constant temperature of 220°C for 12h. Naturally cool the reaction mixture to room temperature, filter and wash with N,N-dimethylformamide and methanol solution, wherein the concentration of N,N-dimethylformamide is 20wt%, and dry at 60°C for 24h under vacuum to obtain MOF (Cr ) / Al 2 o 3 Composite material precursor A, wherein the Al element is Al 2 o 3 The total mass content is 75.7%.

[0057] 2) Preparation of solution B: uranyl acetate dihydrate was dissolved in deionized water to prepare an aqueous solution with a concentration of 25 wt%. Soak 18.5g of composite material precursor A in mixed solution B, add 0.37g of pol...

Embodiment 2

[0064] (1) Catalyst preparation:

[0065] 1) MOF(Cr) / Al 2 o 3 Preparation of composite material A precursor: weigh 9gCr(NO 3 ) 3 9H 2 Dissolve O in 120mL of deionized water, add 2g of terephthalic acid, add 10g of diaspore powder into it, stir for 15min, put the reactant in a self-pressure reactor, keep the temperature at 200°C for 72h, and cool naturally after the reaction The reaction mixture was brought to room temperature, filtered, washed with N,N-dimethylformamide and methanol solution after centrifugation, wherein the concentration of N,N-dimethylformamide was 80wt%, and dried at 120°C for 8h in vacuum to obtain MOF (Cr ) / Al 2 o 3 Composite material precursor A, wherein the Al element is Al 2 o 3 The total mass content is 58.5%.

[0066] 2) Preparation of solution B: uranyl acetate was dissolved in methanol to prepare a 30% (by weight) solution. Soak 17.1g of composite material precursor A in mixed solution B, add 0.01g of polyacrylamide polymer crosslinking a...

Embodiment 3

[0073] (1) Catalyst preparation:

[0074] 1) MOF(Cr) / Al 2 o 3 Preparation of composite material precursor A: Weigh 4.5gCr(NO 3 ) 3 9H 2 Dissolve O in 90mL of deionized water, add 0.9g of terephthalic acid, add 18g of aluminum hydroxide powder into it, stir for 15min, put the reactant in a self-pressure reactor, keep the temperature at 160°C for 120h, and cool down naturally after the reaction The mixture was brought to room temperature, filtered, centrifuged and washed with N,N-dimethylformamide and methanol solution, wherein the concentration of N,N-dimethylformamide was 50wt%, and dried at 80°C for 15h under vacuum to obtain MOF(Cr) / Al 2 o 3 Composite material precursor A, wherein the Al element is Al 2 o 3 The total mass content is 90.6%.

[0075] 2) Preparation of solution B: 28% (by weight) solution was prepared by dissolving uranyl nitrate hexahydrate in benzene. Soak 15.9g of composite material precursor A in mixed solution B, add 0.16g of polyparabenamide poly...

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Abstract

The invention relates to a preparation method of a uranium-based catalyst, a catalyst prepared from the uranium-based catalyst and application of the catalyst in preparation of chlorine through hydrogen chloride oxidation. The catalyst comprises an active component uranium-containing compound, an auxiliary active component Cr and a composite carrier C / Al2O3. The composite carrier C / Al2O3 is obtained by pyrolysis of an MOF composite material, and a polymer cross-linking agent is added in the pyrolysis process, so the prepared catalyst has the advantages of high activity, good stability, low cost and the like, and the pollution problem caused by loss of radioactive uranium elements can be solved.

Description

technical field [0001] The invention belongs to the technical field of catalyst and chlorine gas preparation, and in particular relates to a uranium-based catalyst and a preparation method, as well as a method for producing chlorine gas by oxidation of hydrogen chloride. Background technique [0002] As an important basic chemical raw material, chlorine gas is widely used in fine chemical industry, agriculture, food, construction, medicine, energy and other industries. At present, the production methods of chlorine gas in industry are basically obtained by electrolysis of salt water. However, this method has the following problems: (1) energy consumption is high, and its power consumption is as high as 2760kWh / ton, so that the chlor-alkali industry has become one of the high power consumption fields in the country. (2) Electrolysis produces a large amount of caustic soda. At present, there is a large excess of caustic soda in the chlorine-related industry. (3) The equipmen...

Claims

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Application Information

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IPC IPC(8): B01J23/26B01J23/10C01B7/04
Inventor 殷艳欣易光铨曹传宗孙康黎源
Owner WANHUA CHEM GRP CO LTD
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