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Industrial catalyst for preparing ethanol with acetic ester by hydrogenation, preparation method of industrial catalyst and application

A catalyst, acetate technology, applied in chemical instruments and methods, hydroxyl compound preparation, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of metal chromium environment unfriendly, low ethanol selectivity, catalyst cost Advanced problems, to achieve the effect of simple preparation method, high selectivity, and pollution reduction

Active Publication Date: 2013-02-27
SHANGHAI WUZHENG ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most widely used catalysts for ester hydrogenation are copper-chromium catalysts. The disadvantage is that metal chromium is not friendly to the environment; there are also noble metal catalysts, but the disadvantage is that the cost of the catalyst is high; there are also copper-zinc-aluminum catalysts and alumina carriers. Although it has a good dispersion effect, there are many side reactions and the selectivity of ethanol is low

Method used

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  • Industrial catalyst for preparing ethanol with acetic ester by hydrogenation, preparation method of industrial catalyst and application
  • Industrial catalyst for preparing ethanol with acetic ester by hydrogenation, preparation method of industrial catalyst and application
  • Industrial catalyst for preparing ethanol with acetic ester by hydrogenation, preparation method of industrial catalyst and application

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Preparation of industrial catalysts for the hydrogenation of acetate to ethanol:

[0042] (1) 1.5 liters of copper nitrate solution (the content of Cu is 8%wt), and 300 grams of Zn(NO 3 ) 2 .6H 2 O, add 50 g Mg(NO 3 ) 2 .6H 2 O is dissolved, diluted with deionized water to a total metal ion concentration of 0.2mol / L, and the pH of the solution is <2;

[0043] (2) After dissolving 300 grams of sodium carbonate in deionized water, add 0.6 liter of 25wt% silica sol, and then dilute to a carbonate concentration of 0.2mol / L, and the pH of the solution is >11;

[0044] (3) Under stirring, add the above two solutions dropwise into the reaction kettle to carry out the precipitation reaction. The reaction temperature is 70°C. After the solution is added dropwise, continue to keep warm and stir for 1 hour, and the pH value of the kettle liquid is >7;

[0045] (4) After the reaction is completed, wash repeatedly with deionized water and filter until the filtrate is neutral a...

Embodiment 2

[0053] Preparation of acetate hydrogenation catalyst:

[0054] (1) 1.5 liters of copper nitrate solution (the content of Cu is 8%wt), and 250 grams of Zn(NO 3 ) 2 .6H 2 O, add 30 g Co(NO3 ) 2 .6H 2 O is dissolved, diluted with deionized water to a total metal ion concentration of 0.2mol / L, and the pH of the solution is <2;

[0055] (2) After dissolving 300 grams of sodium carbonate in deionized water, add 0.6 liter of 25wt% silica sol, and then dilute to a carbonate concentration of 0.2mol / L, and the pH of the solution is >11;

[0056] (3) Under stirring, add the above two solutions dropwise into the reaction kettle to carry out the precipitation reaction. The reaction temperature is 70°C. After the solution is added dropwise, continue to keep warm and stir for 1 hour, and the pH value of the kettle liquid is >7;

[0057] (4) After the reaction is completed, wash repeatedly with deionized water and filter until the filtrate is neutral and the conductivity is <1000μs / cm; t...

Embodiment 3

[0065] Preparation of industrial catalysts for the hydrogenation of acetate to ethanol:

[0066] (1) 1.5 liters of copper nitrate solution (the content of Cu is 8%wt), and 200 grams of Zn(NO 3 ) 2 .6H 2 O, add 40 g Ca(NO 3 ) 2 .4H 2 O is dissolved, diluted with deionized water to a total metal ion concentration of 0.2mol / L, and the pH of the solution is <2;

[0067] (2) After dissolving 300 grams of sodium carbonate in deionized water, add 0.6 liter of 25%wt silica sol, and then dilute until the concentration of carbonate is 0.2mol / L, and the pH value of the solution is >11;

[0068] (3) Under stirring, add the above two solutions dropwise into the reaction kettle to carry out the precipitation reaction. The reaction temperature is 80°C. After the solution is added dropwise, continue to keep warm and stir for 1 hour, and the pH value of the kettle liquid is >7;

[0069] (4) After the reaction is completed, wash repeatedly with deionized water and filter until the filtrat...

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Abstract

The invention relates to an industrial catalyst for preparing ethanol with acetic ester by hydrogenation. The catalyst comprises, in weight percent, 20-50% of CuO, 10-30% of ZnO, 1-10% of M oxide and 10-69% of SiO2, wherein the M is selected from IIA group or VIII group metals, the SiO2 is amorphous silicon dioxide, the specific surface area of the catalyst is 100-300m<2> / g, and the specific surface area of active copper is 10-20m<2> / g. The preparation process of the catalyst includes the steps: firstly, mixing precursors of metal Cu, Zn and M to prepare water solution I, mixing a Si precursor and a precipitator to prepare water solution II and then mixing and precipitating the solution; and secondly, performing washing, filtering, drying, preforming, roasting, crushing and reducing to obtain the catalyst. The obtained catalyst has high catalytic activity for hydrogenation of the acetic ester and has a certain water resistance and acid resistance, the ethanol has high selectivity, and the service life of the catalyst is prolonged.

Description

technical field [0001] The invention relates to an industrial catalyst for preparing ethanol by hydrogenation of acetate, a preparation method and application thereof, and belongs to the field of hydrogenation catalysts. Background technique [0002] Ethanol, commonly known as alcohol, is a flammable, volatile, colorless and transparent liquid at room temperature. Ethanol has a wide variety of uses. Ethanol can be made into flavors, beverages, and ethanol solutions of different concentrations are used as disinfectants. Ethanol is a basic organic chemical raw material, which can be used to prepare acetaldehyde, acetic acid, ether, ethylamine, etc. It is also a raw material for the preparation of dyes, paints, detergents, etc. It can also be used as a diluent, organic solvent, etc. Adding ethanol to gasoline as a new type of clean fuel can reduce harmful gas emissions and is an important development direction. [0003] At present, ethanol is generally produced by fermentati...

Claims

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Application Information

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IPC IPC(8): B01J23/80C07C31/08C07C29/149
Inventor 王保明李玉江徐长青王东辉
Owner SHANGHAI WUZHENG ENG TECH CO LTD
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