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Catalyst, preparation method and application of direct dehydrogenation of ethanol to acetaldehyde

A catalyst and dehydrogenation technology, which is applied in the direction of dehydrogenation preparation, physical/chemical process catalyst, carbon-based compound preparation, etc., can solve the problems of reducing the mechanical strength of the catalyst, making the catalyst easy to pulverize, increasing the difficulty of catalyst molding, etc., and achieving excellent stability The effect of high stability, outstanding stability and simple preparation method

Active Publication Date: 2022-05-17
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the inertness of the carbon surface increases the difficulty of catalyst molding, reduces the mechanical strength of the catalyst, and the catalyst is easy to pulverize during use.

Method used

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  • Catalyst, preparation method and application of direct dehydrogenation of ethanol to acetaldehyde
  • Catalyst, preparation method and application of direct dehydrogenation of ethanol to acetaldehyde
  • Catalyst, preparation method and application of direct dehydrogenation of ethanol to acetaldehyde

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation of embodiment 1 5Cu / BN-bm catalyst

[0041] Its preparation process is as follows:

[0042] (1) Take BN-bm and dry it in an airflow oven at 120°C for 2 hours to remove physically adsorbed water on the surface;

[0043] (2) At 25°C, take Cu(NO 3 ) 2 ·3H 2 Immerse an equal volume of O aqueous solution on the BN-bm obtained by step (1) drying, and let stand for 2h;

[0044] (3) drying the mixture after step (2) at 50° C. for 10 h to obtain a catalyst precursor;

[0045] (4) Dry the catalyst precursor obtained in step (3) at 140°C for 0.5h, then hydrogen reduce it at 350°C for 2h (10vol%H 2 / N 2 ), prepared 5Cu / BN-bm (No. 4 in Table 1) catalyst.

Embodiment 2

[0046] The preparation of embodiment 2 0.5Cu / BN-bm catalyst

[0047] Its preparation process is identical with embodiment 1, and difference is only to use the Cu(NO 3 ) 2 ·3H 2 O aqueous solution.

Embodiment 31

[0048] The preparation of embodiment 3 1Cu / BN-bm catalyst

[0049] Its preparation process is identical with embodiment 1, and difference is only to have used Cu(NO 3 ) 2 ·3H 2 O aqueous solution.

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Abstract

The invention relates to a catalyst for preparing acetaldehyde by direct dehydrogenation of ethanol, which comprises an active component and Cu supported on a boron-containing compound as a carrier, wherein the active component contains Cu, and the active component is 0.1- 30wt%, and the carrier is 70-99.9wt%. The invention also relates to the preparation method of the catalyst and its application in the preparation of acetaldehyde by ethanol dehydrogenation. Using the catalyst of the invention, the acetaldehyde selectivity is high, the conversion rate is high, and the catalyst has excellent stability.

Description

technical field [0001] The invention relates to a catalyst for preparing acetaldehyde by direct dehydrogenation of ethanol, a preparation method and an application thereof, belonging to the technical field of chemical catalysis. Specifically, the present invention relates to a catalyst capable of directly dehydrogenating ethanol to prepare acetaldehyde under the condition of gas phase and normal pressure, its preparation method and application. Background technique [0002] Acetaldehyde is an important aliphatic compound, which is a raw material for the production of (per)acetic acid, pentaerythritol, crotonaldehyde, 2-ethylhexanol, pyridine, ethyl acetate, chloral and other important chemicals. It is widely used in fields such as agriculture, industry and daily life, and has high application value. [0003] At present, the synthesis route of acetaldehyde mainly includes ethylene oxidation method, acetylene hydration method, acetic acid reduction method, ethane oxidation me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J27/18C07C45/00C07C47/06
CPCB01J27/24B01J27/1817C07C45/002C07C47/06
Inventor 陆安慧王庆楠翁雪霏
Owner DALIAN UNIV OF TECH
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