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Preparation method of catalyst for preparation of acetaldehyde through hydrogenation of acetic acid

A catalyst and hydrogen preparation technology, applied in the direction of hydrogenolysis preparation, molecular sieve catalysts, chemical instruments and methods, etc., to achieve the effect of improving selectivity

Inactive Publication Date: 2014-11-26
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production of acetic acid from natural gas or coal through methanol carbonylation is the current non-petroleum production route of acetic acid. Its process is mature and its production is large-scale.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing a catalyst for the hydrogenation of acetic acid to prepare acetaldehyde, using MCM-41 molecular sieve as a carrier, and adopting an equal volume impregnation method to prepare loaded Fe 2 o 3 And the catalyst of Pt, its preparation step comprises:

[0021] (1) 2.65g chloroplatinic acid (H 2 PtCl 6 ·6H 2 O) Dissolve in 8ml of deionized water and make it into chloroplatinic acid solution for later use.

[0022] (2) (According to the requirement that the mass ratio of Fe to the carrier is 10-40:100) Weigh 28.9g of ferric nitrate salt, dissolve it in 8ml of water; take 10g of MCM-41 molecular sieve carrier, and use ferric nitrate The saline solution impregnated the MCM-41 molecular sieve support and stirred for 30 minutes.

[0023] (3) Impregnate the equal volume of the chloroplatinic acid solution prepared in step (1) with the MCM-41 molecular sieve carrier impregnated with ferric nitrate salt in step (2) for 12 hours, and then dry it in a dryin...

Embodiment 2

[0030] A kind of preparation method of the catalyst that is used for the hydrogenation of acetic acid to prepare acetaldehyde, with silicon dioxide (SiO 2 ) as the carrier, the loaded iron oxide (Fe 2 o 3 ) and platinum (Pt) catalyst, its preparation steps include:

[0031] (1) 0.26g chloroplatinic acid (H 2 PtCl 6 ·6H 2 O) Dissolve in 18ml deionized water, and make it into chloroplatinic acid solution for later use.

[0032] (2) Weigh 7.2g of ferric nitrate salt, dissolve the ferric nitrate salt in 18ml of water; take 10g of silica carrier, impregnate the silica carrier with ferric nitrate salt aqueous solution and stir for 10 minutes.

[0033] (3) The chloroplatinic acid solution prepared in step (1) was impregnated with an equal volume of the silica carrier impregnated with ferric nitrate salt in step (2) for 6 hours, and then dried in a drying oven at 90°C for 10 Hour;

[0034] (4) Place the silicon dioxide carrier impregnated and dried by the chloroplatinic acid so...

Embodiment 3

[0040] A method for preparing a catalyst for the hydrogenation of acetic acid to prepare acetaldehyde, using SBA-15 molecular sieve as a carrier, and adopting an equal volume impregnation method to prepare loaded Fe 2 o 3 And the catalyst of Pt, its preparation step comprises:

[0041] (1) 2.65g chloroplatinic acid (H 2 PtCl 6 ·6H 2 O) Dissolve in 12ml deionized water, and make it into chloroplatinic acid solution for later use.

[0042] (2) Weigh 28.9g of ferric nitrate salt, dissolve the ferric nitrate salt in 12ml of water; take 10g of SBA-15 molecular sieve carrier, impregnate the SBA-15 molecular sieve carrier with ferric nitrate salt aqueous solution and stir for 50 minutes.

[0043] (3) The equal volume of chloroplatinic acid solution prepared in step (1) is impregnated with the SBA-15 molecular sieve carrier impregnated by ferric nitrate salt in step (2), impregnated for 20 hours, and then dried in a drying oven at 150°C 11 hours;

[0044] (4) Place the SBA-15 mole...

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Abstract

The invention discloses a preparation method of a catalyst for preparation of acetaldehyde through hydrogenation of acetic acid. With silicon dioxide, a MCM-41 molecular sieve or a SBA-15 molecular sieve as a carrier, a Fe2O3 and Pt-based catalyst is prepared by adopting an isovolumetric impregnation method. The preparation method comprises the steps: (1) preparing a chloroplatinic acid solution; (2) impregnating a silicon dioxide, MCM-41 molecular sieve or SBA-15 molecular sieve carrier by using an iron nitrate solution, and mixing; (3) impregnating the silicon dioxide, MCM-41 molecular sieve or SBA-15 molecular sieve carrier impregnated by iron nitrate by using a chloroplatinic acid solution and drying; and (4) roasting the dried silicon dioxide, MCM-41 molecular sieve or SBA-15 molecular sieve carrier impregnated by using the chloroplatinic acid solution to obtain a Pt-Fe-loaded catalyst of the silicon dioxide, MCM-41 molecular sieve or SBA-15 molecular sieve carrier. The preparation method disclosed by the invention can ensure that the catalyst is prepared at more suitable temperature and pressure; and the prepared catalyst can improve the selectivity of the acetaldehyde.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a method for preparing a catalyst for hydrogenating acetic acid to prepare acetaldehyde. technical background [0002] Acetaldehyde is an important basic raw material for leather, pharmaceutical, paper and pesticide production. As an important organic intermediate, acetaldehyde itself has almost no direct use, but in chemical production, acetaldehyde can be used to produce a variety of important organic chemical products, including acetate, pentaerythritol, butyl acid, glyoxal, lactic acid, butanediol, chloral, butanol sorbate and pyridine compounds, etc. [0003] There are many ways to synthesize acetaldehyde, such as Rosenmund reduction method, ethane oxidation method, ethylene oxidation method, ethanol oxidation method, ethanol reduction method and acetic acid reduction method, etc. However, the production route of ethylene oxidation method is almost used interna...

Claims

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Application Information

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IPC IPC(8): B01J29/035B01J29/76C07C45/41C07C47/06
Inventor 应卫勇张海涛马宏方费妮娜周明川雷坤
Owner EAST CHINA UNIV OF SCI & TECH
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