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Copper-chromium catalyst as well as preparation method and application thereof

A catalyst, copper-chromium technology, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of complex process flow and low reaction efficiency, and achieve stable hydrogenation catalytic performance and uniform physicochemical properties. , the effect of small loss

Pending Publication Date: 2021-12-17
CHINA NAT OFFSHORE OIL CORP +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst contains a copper component, a chromium component and an auxiliary agent, wherein the auxiliary agent is provided by at least one compound containing a metal element of Group IVB; The molar ratio of the copper component is 5-20:1; in terms of metal elements, the molar ratio of the copper component to the chromium component is 0.9-2.75:1; the particle size of the catalyst is less than or equal to 800 mesh, and the specific surface area 10-150m 2 / g, the pore volume is 0.1-0.6mL / g; the preparation method of the catalyst comprises: grinding the precursors of copper oxide, chromium trioxide and additives, followed by drying and roasting; the method is in the preparation process Additional additives need to be added, and the reaction is a solid-solid reaction, the reaction efficiency is low, and the process still has a certain complexity

Method used

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  • Copper-chromium catalyst as well as preparation method and application thereof
  • Copper-chromium catalyst as well as preparation method and application thereof
  • Copper-chromium catalyst as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0079] The present embodiment provides a kind of preparation method of copper chromium catalyst, the process flow diagram of described preparation method is as follows figure 1 shown.

[0080] The preparation method comprises the following steps:

[0081] Measure 263.98mL copper nitrate solution (concentration is 1.0mol / L), then add dropwise 290.38mL oxalic acid solution (concentration is 1.0mol / L, oxalic acid and copper ion molar ratio is 1.1 : 1), aging for 10 hours after the completion of the dropwise addition, and then centrifuging to obtain copper oxalate precipitation for subsequent use.

[0082] Measure 184.22mL of chromium nitrate solution (concentration is 1.0mol / L), then add dropwise 31.32g of ammonia solution (industrial ammonia water with an ammonia mass concentration of 30%) in the chromium nitrate solution at room temperature and under stirring conditions, after the addition is completed, Aging for 10 hours, then filtered to obtain precipitated chromium hydroxi...

Embodiment 2

[0087] The present embodiment provides a kind of preparation method of copper chromium catalyst, and described preparation method comprises the following steps:

[0088] Measure 131.99mL copper nitrate solution (concentration is 2.0mol / L), then add dropwise 263.98mL oxalic acid solution (concentration is 1.0mol / L, oxalic acid and copper ion molar ratio is 1 : 1), aging for 10 hours after the completion of the dropwise addition, and then centrifuging to obtain copper oxalate precipitation for subsequent use.

[0089] Measure 122.81mL of chromium nitrate solution (concentration is 1.5mol / L), then add dropwise 31.32g of aqueous ammonia solution (industrial ammonia water with an ammonia mass concentration of 30%) in the chromium nitrate solution at room temperature and under stirring conditions, after the addition is completed, After aging for 10 hours, filter to obtain chromium hydroxide precipitate for later use.

[0090] The obtained chromium hydroxide precipitate was placed i...

Embodiment 3

[0094] The present embodiment provides a kind of preparation method of copper chromium catalyst, and described preparation method comprises the following steps:

[0095] Measure 175.99mL copper nitrate solution (concentration is 1.5mol / L), then add dropwise 263.98mL oxalic acid solution (concentration is 1.0mol / L, oxalic acid and copper ion molar ratio is 1 : 1), aging for 10 hours after the completion of the dropwise addition, then centrifuging to obtain copper oxalate precipitation for subsequent use.

[0096] Measure 92.11mL of chromium nitrate solution (concentration is 2.0mol / L), then add dropwise 31.32g of ammonia solution (industrial ammonia water with ammonia mass concentration of 30%) in the chromium nitrate solution at room temperature and under agitation. After aging for 10 hours, filter to obtain chromium hydroxide precipitate for later use.

[0097] The obtained chromium hydroxide precipitate was placed in a glass reactor with a stirring and heating jacket with a...

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Abstract

The invention provides a copper-chromium catalyst and a preparation method and application thereof. The preparation method comprises the following steps: mixing cupric oxalate and chromium oxalate with water for reaction to obtain gel; and sequentially drying and roasting the obtained gel to obtain the copper-chromium catalyst. The preparation method is simple in technological process, on one hand, high yield of metal ions in the raw materials, high hydrogenation activity of the catalyst and selectivity of target hydrogenation products are guaranteed, discharge of waste liquid containing high-valence chromium ions is eliminated, and meanwhile severity of catalyst preparation operation conditions is reduced; and on the other hand, the yield of the industrial production catalyst is improved, the catalyst cost is reduced, and the method has good industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a copper-chromium catalyst and its preparation method and application. Background technique [0002] The formation of aldehydes with one more carbon atom from olefins with carbon monoxide and hydrogen under the action of a catalyst is a well-known process. Aldehydes can be directly hydrogenated to give alcohols, or can be condensed to give alkenals and then hydrogenated to finally give alcohols. [0003] Copper-based catalysts such as copper-chromium catalysts and copper-zinc catalysts have high carbonyl hydrogenation activity and selectivity to target alcohols. Therefore, at present, the hydrogenation technology of copper-based catalysts is mostly used in the hydrogenation of alkenes or aldehydes in industry. Among them, butyraldehyde and octenal mostly use the gas-phase hydrogenation process of copper-zinc catalyst, while isononanal and 2-propylhepten...

Claims

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Application Information

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IPC IPC(8): B01J23/86B01J35/10C07C29/141C07C31/12C07C31/125
CPCB01J23/002B01J23/868C07C29/141B01J35/613B01J35/633B01J35/647C07C31/12C07C31/125
Inventor 姚志龙陈和宋冰洁傅送保贾鑫侯章贵张伟柴文正孙培勇殷晓东张胜红张卉
Owner CHINA NAT OFFSHORE OIL CORP
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