Catalyst for preparing ethanol through hydrogenation of acetic acid as well as preparation method and application thereof

A catalyst and a technology for ethanol production, which are applied in chemical instruments and methods, preparation of hydroxyl compounds, and preparation of organic compounds, etc., can solve the problems of lack of industrial value, high price of precious metals, low reaction rate and product yield, etc., and achieve favorable The effect of large-scale industrial production, good reactivity, and simple method

Inactive Publication Date: 2012-07-25
山西盛驰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For a long time, acetic acid is an oxide of ethanol. In theory, choosing a suitable catalyst can hydrogenate the carboxyl group to obtain ethanol, but in general, it is difficult to carry out the hydrogenation reaction of acetic acid. There are many catalysts, such as copper chromite or modified catalysts, The reaction requires a high temperature of 250°C and a high pressure of 30 MPa, and there are a large number of ester by-products, etc., the reaction rate and product yield are low
Strong reducing agent NaBH 4 The reaction can be carried out, but the cataly

Method used

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  • Catalyst for preparing ethanol through hydrogenation of acetic acid as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0019] The catalyst for the hydrogenation of acetic acid to ethanol, the active component consists of a first active component and a second active component, the first active component is Pt; the second active component is Sn; the active component content is 6wt%, The weight ratio of the first active component to the second active component is 1:1; the carrier is SiO 2 , The carrier content is 94wt%.

[0020] The preparation method of the catalyst for the hydrogenation of acetic acid to ethanol is carried out according to the following steps:

[0021] a) Put H 2 PtCl 6 ·6H 2 O and SnCl 2 ·2H 2 O separately prepare water and acetic acid (1:1 weight ratio) solutions, mix the two to obtain a mixed solution after completely dissolving, and then add the mixed solution to the carrier;

[0022] b) After the catalyst is allowed to stand and age for 24 hours, it is dried in an oven at 80°C for 12 hours, and finally calcined in air at 500°C for 4 hours at a heating rate of 1°C / min to obtain a ...

Embodiment 2

[0024] The catalyst for the hydrogenation of acetic acid to ethanol, the active component is composed of a first active component and a second active component, the first active component is Pd; the second active component is Co; the active component content is 6wt%, The weight ratio of the first active component to the second active component is 1:1; the carrier is activated carbon, and the carrier content is 94 wt%.

[0025] The preparation method of the catalyst for the hydrogenation of acetic acid to ethanol is carried out according to the following steps:

[0026] a) PdCl 2 And Co(NO 3 ) 2 ·6H 2 O separately prepare the aqueous solution, mix the two to obtain a mixed solution after completely dissolving, and then add the mixed solution to the carrier;

[0027] b) After the catalyst is allowed to stand and age for 24 hours, it is dried in an oven at 80°C for 12 hours, and finally calcined in air at 500°C for 4 hours at a heating rate of 1°C / min to obtain a finished catalyst.

Embodiment 3

[0029] The catalyst for the hydrogenation of acetic acid to ethanol, the active component is composed of a first active component and a second active component, the first active component is Ru; the second active component is Sn; the active component content is 6wt%, The weight ratio of the first active component to the second active component is 1:0.5; the carrier is activated carbon, and the carrier content is 94 wt%.

[0030] The preparation method of the catalyst for the hydrogenation of acetic acid to ethanol is carried out according to the following steps:

[0031] a) Put RuCl 3 ·3H 2 O and SnCl 2 ·2H 2 O separately prepare water: acetic acid (1:1 weight ratio) solution, mix the two to obtain a mixed solution after completely dissolving, and then add the mixed solution to the carrier;

[0032] b) After the catalyst is allowed to stand and age for 24 hours, it is dried in an oven at 80°C for 12 hours, and finally calcined in air at 500°C for 4 hours at a heating rate of 1°C / min ...

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Abstract

The invention belongs to the technical fields of a catalyst for preparing ethanol through catalytic hydrogenation of acetic acid and application thereof and aims at providing a catalyst for synthesizing ethanol through efficient catalysis and hydrogenation of acetic acid as well as a preparation method and application thereof. The adopted technical scheme is as follows: the catalyst for preparing ethanol through catalytic hydrogenation of acetic acid comprises an active component and a carrier, wherein the active component consists of a first active component and a second active component; the first active component comprises VIII noble metals such as Pd, Pt, Ru and Rh and metal oxides such as MoO3, WO3, CuO and Re2O7; the second active component comprises one of Zn, Cr, Sn, Co, Ni, Ce and OsO4; and the carrier is one of SiO2, Al2O3 and activated carbon. According to the invention, ethanol is synthesized by hydrogenation of acetic acid; two groups of active metals are used as a co-catalyst for concerted catalysis; the noble metals are reduced or not used in the preparation of the catalyst; and in the hydrogenation reaction of acetic acid, the reaction activity is extremely good and the selectivity is high.

Description

Technical field [0001] The invention belongs to the technical field of catalysts for preparing ethanol by acetic acid catalytic hydrogenation and applications. Background technique [0002] Ethanol is widely used and is an important raw material and solvent for many industrial products. With the development of science and technology, the shortage of fuel and energy has become increasingly serious. In recent years, with the rapid development of my country’s economic construction, the consumption of petroleum-based fuel energy products has been accelerating, the demand has been increasing, and the shortage of raw materials has become increasingly prominent. The use of ethanol as automobile fuel can greatly reduce the burning time of gasoline. Pollution to the environment, and ethanol is recognized as the safest automotive fuel in the world that can be supplied to the market on a larger scale. It is estimated that 60% of the world's ethanol production is used as automotive fuel. [0...

Claims

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Application Information

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IPC IPC(8): B01J23/62B01J23/89B01J23/36B01J23/882B01J23/888B01J23/86B01J23/656C07C31/08C07C29/149
Inventor 李振荣张伟张乾霞
Owner 山西盛驰科技有限公司
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