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Modified cobalt-molybdenum based sulfide catalyst and its preparation method

A technology of sulfide and catalyst, which is applied in the field of catalyst and its preparation, can solve the problems of catalyst stability and life limitation, affect catalyst activity and selectivity, hinder the industrialization of catalyst, etc., and achieve unstable catalytic activity, low price, easy operation simple and easy effects

Inactive Publication Date: 2005-01-26
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the single promoter cobalt or nickel component in the catalyst reported by these patents easily forms cobalt carbonyl or nickel carbonyl under reaction conditions, thereby causing a large amount of loss of the promoter component, which affects the activity and selectivity of the catalyst, resulting in The catalyst stability and life are limited, which hinders the industrialization of this type of catalyst to a certain extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The first step, prepare 100g concentration earlier and be the ammonium thiomolybdate solution of 35%.

[0034] In the second step, dissolve 20g of cobalt acetate and 2g of copper acetate in 100g of distilled water, and drop this solution into 100g of acetic acid solution in parallel with the above-mentioned ammonium thiomolybdate solution, and react under stirring at 40-80°C to form a black precipitate After filtering, the filter cake was washed with distilled water and dried at 60-120°C.

[0035] In the third step, 5g of potassium carbonate and the precipitate obtained in the second step are mechanically ground, mixed evenly, roasted at 350-600°C under the protection of nitrogen, and cooled to room temperature to obtain 50g of black powder. Cobalt-molybdenum-based sulfide catalysts.

Embodiment 2

[0037] The first step, prepare 100g concentration earlier and be the ammonium thiomolybdate solution of 40%.

[0038] In the second step, 25g of cobalt nitrate and 5g of manganese nitrate are dissolved in 100g of distilled water, and this solution and the above-mentioned ammonium thiomolybdate solution are dripped into 100g of oxalic acid solution and reacted under stirring at 40-80°C to form a black precipitate After filtering, the filter cake was washed with ethanol and dried at 60-120°C.

[0039] In the third step, the black precipitate is first roasted under the protection of argon at 350-600° C., and then 15 g of potassium nitrate is mechanically mixed with the roasted product to obtain 70 g of a modified cobalt-molybdenum-based sulfide catalyst.

Embodiment 3

[0041] The first step, prepare 100g concentration earlier and be the ammonium thiomolybdate solution of 45%.

[0042] In the second step, 30g of cobalt chloride and 10g of ferric chloride are dissolved in 100g of distilled water, and this solution is mixed with the above-mentioned ammonium thiomolybdate solution and dripped into 100g of oxalic acid solution, and reacted under stirring at 40-80°C to form Filter the black precipitate, wash the filter cake with acetone, and dry it at 60-120°C.

[0043] The third step is to dissolve 30g of potassium chloride in 30g of distilled water, use the potassium salt solution to impregnate the black precipitate, and then roast and decompose it under the protection of hydrogen at 350-600°C to obtain 90g of modified cobalt-molybdenum-based sulfide catalyst.

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Abstract

The invention is a modified cobalt and molybdenum base sulfide catalyst and its manufacturing method, which belongs to catalyst field. the component of the catalyst is: Mo: 30-40wt%, Co: 20-30wt%, Mn, V, Cr, Cu or Fe: 0.1-10.0wt%, K: 15-25wt%, S: 15-30wt%, through confecting sulph ammonium molybdate liquid, the molybdenum, cobalt and the third transition metal are deposited, filtered, cleaned, dried, grinded, baked, and acquires the product. The activity of the catalyst is stable.

Description

technical field [0001] The invention relates to a modified cobalt-molybdenum-based sulfide catalyst and a preparation method thereof, to be precise, an alkali metal-doped sulfided cobalt-molybdenum-based catalyst modified by a third transition metal component and a preparation method thereof , belongs to the technical field of catalyst and its preparation. Using this catalyst, different H 2 / CO ratio of sulfur compounds or / and hydrocarbons or / and CO 2 C1-C6 low-carbon mixed alcohols are produced from synthetic gas. Background technique [0002] The synthesis of low-carbon mixed alcohols from syngas is an important branch of C1 chemistry. Because the low-carbon mixed alcohol has good solubility and high octane number, it is a green fuel additive that can replace the existing environmentally unfriendly fuel additives, and has great economic value and environmental significance. In addition, in the case of the gradual depletion of petroleum resources, ...

Claims

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Application Information

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IPC IPC(8): B01J27/049B01J37/20
Inventor 何鸣元张华瑞叶生荣陈波余淑媛
Owner EAST CHINA NORMAL UNIV
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