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Aldehyde hydrogenation catalyst and preparation method thereof

A hydrogenation catalyst and catalyst technology, applied in the direction of hydrogenation preparation, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of small pore size, low hydrogenation activity, etc., to reduce the pressure drop of the bed and reduce the energy consumption of the device operation , Improve the effect of internal diffusion performance

Pending Publication Date: 2021-06-29
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to achieve the above object, the present invention provides an aldehyde hydrogenation catalyst and its preparation method to overcome the defects of small pore size and low hydrogenation activity of the aldehyde hydrogenation catalyst in the prior art

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  • Aldehyde hydrogenation catalyst and preparation method thereof
  • Aldehyde hydrogenation catalyst and preparation method thereof

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preparation example Construction

[0030] The invention provides a kind of preparation method of aldehyde hydrogenation catalyst, comprises the steps:

[0031] Step 1, dissolving copper precursor, zinc precursor, aluminum precursor and pore expander in water to form a mixed solution, and then co-precipitating the mixed solution with a precipitant;

[0032] Step 2, aging the co-precipitated mixture obtained in step 1, filtering to obtain a filter cake, drying the filter cake and mixing it with an auxiliary agent evenly to obtain a powder;

[0033] Step 3, mixing the powder with a binder and performing pre-granulation to obtain a pre-granulated catalyst;

[0034] Step 4, calcining the pre-granulated catalyst, and then adding graphite into a tablet to obtain an aldehyde hydrogenation catalyst.

[0035] Wherein, the copper precursor is preferably a soluble salt of copper, the zinc precursor is preferably a soluble salt of zinc, and the aluminum precursor is preferably a soluble salt of aluminum, such as copper nit...

Embodiment 1

[0047] (1) Dissolve 20g of P123 in 1200ml of water, then add 123g of copper nitrate, 185g of zinc nitrate, and 7g of aluminum nitrate to form 1300ml of a mixed solution of copper, zinc, and aluminum. Carry out co-precipitation, control the precipitation temperature at about 50°C, the pH value during the process is 6.8-7.5, the neutralization time is 30 minutes, and the final pH value is 7.0-7.2;

[0048] (2) Stir and age the mixed solution at 50° C. to 60° C. for 30 minutes, wash with deionized water at 40° C. to 50° C. for four times, and filter to obtain a filter cake for drying. Mix the filter cake obtained by drying with 10 g of amorphous silicon evenly to obtain a powder;

[0049] (3) Add 0.3g of sodium hydroxymethylcellulose and 1.2g of silica sol into 2g of water, fully stir to make a binder; mix the binder with the powder, and pre-granulate;

[0050] (4) The pre-granulated catalyst precursor was calcined at 360-550° C., and then 2% of the total mass of the obtained ma...

Embodiment 2

[0052] (1) Get 25g water-soluble chitosan and dissolve in 1200ml water, then add 123g copper nitrate, 175g zinc nitrate, 14g aluminum nitrate to make copper, zinc, aluminum mixed solution 1300ml, in the precipitation tank with stirring Co-precipitate with sodium carbonate solution, control the precipitation temperature at about 50°C, the pH value during the process is 6.8-7.5, the neutralization time is 30 minutes, and the final pH value is 7.0-7.2;

[0053] (2) Stir the mixed solution at 50°C to 60°C, age for 30min, wash with deionized water at 40°C to 50°C four times, filter and dry the filter cake; mix the dried filter cake with 10g of amorphous silicon evenly , to obtain powder;

[0054] (3) Add 0.3g sodium hydroxymethyl cellulose and 1.2g silica sol into 2g of water, fully stir to make a binder; the obtained filter cake is mixed with the binder, and pre-granulated;

[0055] (4) The pre-granulated catalyst precursor was calcined at 360-400° C., and then 2% of the total ma...

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Abstract

The invention discloses an aldehyde hydrogenation catalyst and a preparation method thereof. The method comprises the following steps: 1, dissolving a copper precursor, a zinc precursor, an aluminum precursor and a pore-enlarging agent in water to form a mixed solution, and then co-precipitating the mixed solution and a precipitating agent; 2, aging the co-precipitated mixture obtained in the step 1, filtering to obtain a filter cake, drying the filter cake, and uniformly mixing the dried filter cake with an auxiliary agent to obtain powder; 3, mixing the powder with a binder, and carrying out pre-granulation to obtain a pre-granulated catalyst; and 4, roasting the pre-granulated catalyst, then adding graphite, tabletting and molding to obtain the aldehyde hydrogenation catalyst. The catalyst prepared by the method provided by the invention has a large aperture, and can effectively improve the internal diffusion performance of reaction materials; and the catalyst has a low bulk density, and compared with like products, the cost of the catalyst is reduced by about 5%.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to an aldehyde gas-phase hydrogenation catalyst and a preparation method of the catalyst. Background technique [0002] At present, the companies engaged in the research of aldehyde hydrogenation catalysts mainly include German Southern Chemical Company, British DAVY Company, German Huels Company, German Hoechst Company, American Engelhard Company, Russian Khvorov Company, China Petroleum and Petrochemical Research Institute, and Sinopec Nanhua Company. Institute, Sinopec Fushun Petrochemical Research Institute, CNOOC Tianjin Chemical Research and Design Institute, etc. [0003] At the end of the 1970s, the process of propylene carbonylation to produce butanol and octanol was widely used, and the demand for aldehyde hydrogenation catalysts increased. From the late 1980s to the early 1990s, many companies developed gas phase catalysts with Cu-Cr as the active component....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J35/10C07C29/141C07C29/17C07C31/12C07C31/125
CPCB01J23/80C07C29/175C07C29/141B01J35/613B01J35/633B01J35/647C07C31/125C07C31/12
Inventor 倪术荣吴显军王刚徐伟池葛冬梅夏恩冬孟祥彬靳丽丽李凤铉李瑞峰马守涛张浩张铁珍揭红郭立艳梁宇王紫东谢方明
Owner PETROCHINA CO LTD
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