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A kind of preparation method and application of acetic acid hydrogenation catalyst

A hydrogenation catalyst and catalyst technology are applied in the preparation of organic compounds, chemical instruments and methods, preparation of hydroxyl compounds, etc., and can solve the problems of increasing the amount of by-product acetone, reducing the yield and purity of ethanol, etc. improved effect

Active Publication Date: 2020-06-23
SHENYANG SANJUKAITE CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved in the present invention is to overcome the defects in the prior art that increase the surface alkalinity of the carrier while reducing the acidic sites on the surface of the carrier, thereby causing an increase in the amount of by-product acetone and isopropanol, and reducing the yield and purity of ethanol , thereby providing a preparation method and application of acetic acid hydrogenation catalyst

Method used

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  • A kind of preparation method and application of acetic acid hydrogenation catalyst
  • A kind of preparation method and application of acetic acid hydrogenation catalyst
  • A kind of preparation method and application of acetic acid hydrogenation catalyst

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Embodiment 1

[0025] The present embodiment provides a kind of preparation method of acetic acid hydrogenation catalyst, comprises the steps:

[0026] (1) adding cobalt nitrate and calcium nitrate into water, after stirring uniformly, adding ferric nitrate and tin nitrate, after stirring uniformly, to obtain soaking solution;

[0027] (2) adding sodium carbonate to the soaking solution to form a precipitation solution, adding a silica carrier to the precipitation solution, aging for 3 hours under hydrothermal conditions at a temperature of 80° C., and filtering to obtain a filtered solid;

[0028] (3) The amount of sodium carbonate on which the filtered solid is cleaned is less than 2% of the mass of the filtered solid, dried at a temperature of 100°C, and then roasted at 300°C to obtain the catalyst precursor;

[0029] (4) Place the catalyst precursor in a closed reaction vessel, feed carbon dioxide gas until the partial pressure is 150kpa, control the temperature in the reaction vessel at...

Embodiment 2

[0032] The present embodiment provides a kind of preparation method of acetic acid hydrogenation catalyst, comprises the steps:

[0033] (1) adding copper nitrate and calcium nitrate to water, after stirring evenly, adding ferric nitrate and molybdenum nitrate, after stirring uniformly, to obtain the soaking solution;

[0034] (2) adding sodium carbonate to the soaking solution to form a precipitation solution, adding a silica carrier to the precipitation solution, aging for 5 hours under hydrothermal conditions at a temperature of 70° C., and filtering to obtain a filtered solid;

[0035] (3) cleaning and filtering the solid to the amount of sodium carbonate on it is less than 2% of the mass of the filtered solid, drying at a temperature of 80°C, and roasting at 600°C to obtain the catalyst precursor;

[0036] (4) Place the catalyst precursor in a closed reaction vessel, feed carbon dioxide gas until the partial pressure is 250kpa, control the temperature in the reaction vess...

Embodiment 3

[0039] The present embodiment provides a kind of preparation method of acetic acid hydrogenation catalyst, comprises the steps:

[0040] (1) adding copper nitrate and barium nitrate to water, after stirring evenly, adding tungsten nitrate and molybdenum nitrate, after stirring evenly, to obtain the soaking solution;

[0041] (2) adding sodium carbonate to the soaking solution to form a precipitation solution, adding a zirconia carrier to the precipitation solution, aging for 1 hour under hydrothermal conditions at a temperature of 90° C., and filtering to obtain a filtered solid;

[0042](3) The amount of sodium carbonate on which the filtered solid is cleaned is less than 2% of the mass of the filtered solid, dried at a temperature of 150° C., and then roasted at 450° C. to obtain the catalyst precursor;

[0043] (4) Place the catalyst precursor in a closed reaction vessel, feed carbon dioxide gas until the partial pressure is 200kpa, control the temperature in the reaction v...

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Abstract

The method for preparing an acetic acid hydrogenation catalyst disclosed by the present invention focuses on carbonizing a carrier precursor for 12-48 hours in an environment with a partial pressure of carbon dioxide greater than 80 kPa and a temperature of 20-100° C. to obtain the acetic acid hydrogenation catalyst. Utilize barium carbonate and calcium carbonate in the present invention not only can play and reduce the acidity of catalyst, and avoid alkaline earth metal and alkaline earth metal to form strongly basic alkali metal and alkaline earth metal oxide with oxygen, thereby avoided the raising of catalyst alkali amount , so that the acetic acid hydrogenation catalyst reduces the acidity while its surface alkalinity does not increase, thereby avoiding the generation of by-products acetone and isopropanol.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a preparation method and application of an acetic acid hydrogenation catalyst. Background technique [0002] Ethanol is an important chemical, pharmaceutical, energy and food raw material. The hydrogenation of acetic acid to prepare ethanol is one of the common methods for producing ethanol in industry. The preparation of ethanol by this method mainly includes two ways, one is that acetic acid is esterified to produce acetate, and then hydrogenated to produce ethanol, and then refined to produce ethanol products; the other is to directly hydrogenate acetic acid to produce ethanol, which is then refined to produce ethanol product. No matter which of the above ethanol preparation processes will produce a large amount of by-products such as methane, ethane, carbon monoxide, acetaldehyde, ether, ethyl acetate and acetone. The catalyst used in the hydrogenation process can effectively redu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/835B01J23/888B01J27/232C07C29/149C07C31/08
CPCB01J23/002B01J23/835B01J23/8885B01J27/232B01J2523/00C07C29/149B01J2523/41B01J2523/43B01J2523/842B01J2523/845B01J2523/17B01J2523/68B01J2523/48B01J2523/69C07C31/08
Inventor 蒲延芳黄龙赵素云李景斌
Owner SHENYANG SANJUKAITE CATALYST
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