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Catalyst for preparing low carbon alcohol by hydrogenation of short chain fatty acid ester, preparation method thereof, application thereof, and method for preparing low carbon alcohol by hydrogenation of short chain fatty acid ester

A technology for producing low-carbon alcohols from fatty acid esters, which is applied to the catalyst, production method, and use of short-chain fatty acid esters to produce low-carbon alcohols, and the field of short-chain fatty acid esters to produce low-carbon alcohols. High conversion rate and selectivity can be achieved due to problems such as low sex and space-time yield, high raw material gas purity requirements, and short process routes.

Inactive Publication Date: 2016-07-27
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Syngas to ethanol mainly consists of three process routes: one is to directly produce ethanol from syngas. This method has a short process route, but the main product C 2 Oxygenates, especially ethanol, have low selectivity and space-time yield, and subsequent product purification and separation are difficult, so it is still in the research and development stage
The second is synthetic gas biological ethanol production, which uses microbial fermentation technology to produce ethanol from synthetic gas (including coke oven waste gas containing carbon monoxide and hydrogen). This method requires high purity of raw material gas, and there are certain difficulties in continuous and large-scale production. The cost is relatively high; the third is to produce ethanol from syngas by hydrogenation of acetic acid. At present, the production technology of acetic acid is mature and the price is cheap. The production of ethanol from acetic acid or hydrogenation of acetate is expected to be large-scale and large-scale
But its stability needs to be improved

Method used

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  • Catalyst for preparing low carbon alcohol by hydrogenation of short chain fatty acid ester, preparation method thereof, application thereof, and method for preparing low carbon alcohol by hydrogenation of short chain fatty acid ester
  • Catalyst for preparing low carbon alcohol by hydrogenation of short chain fatty acid ester, preparation method thereof, application thereof, and method for preparing low carbon alcohol by hydrogenation of short chain fatty acid ester

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preparation example Construction

[0042] The method for preparing low-carbon alcohol catalyst by hydrogenation of short-chain fatty acid ester of the present invention comprises the following steps:

[0043] 1) preparing cuproammonia solution A and acidic solution B of cerium and zirconium;

[0044] 2) Add solution B dropwise to solution A, mix, and age the mixed solution;

[0045] 3) Heating the mixed solution to 70-95°C until the pH value is 6-7, and the product precipitates out;

[0046] 4) filtering, washing, drying and calcining the precipitated product to obtain the catalyst.

[0047] Another method for preparing a low-carbon alcohol catalyst by hydrogenation of short-chain fatty acid esters of the present invention comprises the following steps:

[0048] 1) prepare the acidic aqueous solution of copper salt, zirconium salt, cerium salt;

[0049] 2) adding urea to the acidic aqueous solution to obtain a uniformly mixed solution;

[0050] 3) Heating the mixed solution to 70-95°C and refluxing until th...

Embodiment 1

[0081] Weigh 5g of copper nitrate trihydrate, add 20g of concentrated ammonia solution with a weight fraction of 28%, and dissolve it in 200mL of deionized water to form copper ammonia solution A. Then weigh 15 g of cerium nitrate and 7 g of zirconyl nitrate, mix and dissolve in 200 mL of aqueous solution to form solution B. Slowly add solution B dropwise to solution A and keep stirring to form a mixed solution, age the mixed solution at room temperature for 4 hours, then move to an oil bath at 90°C, heat and keep stirring, when the pH value of the solution drops to At 7.0, stop stirring, filter the solution while it is hot, wash the obtained filter cake with ionized water, dry it at 120°C for 12 hours, place it in a muffle furnace, raise the temperature at 1°C / min to 450°C and roast it at a constant temperature for 4 hours, After cooling to room temperature, then, H 2 / Ar mixed gas, the temperature was raised to 300°C at 1°C / min, and reduced for 4 hours to obtain catalyst A....

Embodiment 2

[0083]Weigh 5g of copper nitrate trihydrate, 15g of cerium nitrate, 7g of zirconium oxynitrate dissolved in 200mL of deionized water to form a solution, adjust the pH of the solution to 3 with nitric acid, add 10g of urea to form a mixed solution, and put the mixed solution The three-necked flask was moved to a 90°C oil bath, stirred, and heated to reflux. When the pH value of the solution drops to 7.0, stop stirring, filter the solution while it is hot, wash the obtained filter cake with ion water, dry it at 120°C for 12 hours, put it in a muffle furnace, and raise the temperature to 450°C at 1°C / min Calcined at constant temperature for 4 hours, cooled to room temperature, then, H2 / Ar mixed gas was introduced, the temperature was raised to 300°C at 1°C / min, and reduced for 4 hours to obtain catalyst B.

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Abstract

The invention relates to a catalyst for preparing low carbon alcohol by hydrogenation of short chain fatty acid ester, a preparation method thereof, an application thereof, and a method for preparing low carbon alcohol by hydrogenation of short chain fatty acid ester. The catalyst comprises an active component Cu and a composite carrier CeO2-ZrO2; the weight of the active component Cu is 5-80% of the total weight of the catalyst, the weight of the composite carrier CeO2-ZrO2 is 95-20% of the total weight of the catalyst, and the weight ratio between ZrO2 and CeO2 is 0.01:1-1:0.01. The catalyst can be prepared by a homogenous precipitation-ammonia distillation method and a homogenous precipitation-urea hydrolysis method. The catalyst for preparing low carbon alcohol by hydrogenation of short chain fatty acid ester has the advantages of high conversion rate of short chain fatty acid ester and low selectivity of low carbon alcohol.

Description

technical field [0001] The present invention relates to a catalyst, preparation method and application for preparing low-carbon alcohols by hydrogenation of short-chain fatty acid esters, and a method for preparing low-carbon alcohols by hydrogenation of short-chain fatty acid esters. Preferably, the short-chain fatty acid esters are acetates More preferably ethyl acetate, low-carbon alcohol is ethanol, specifically, the catalyst is Cu / CeO 2 -ZrO 2 catalyst. Background technique [0002] At present, ethanol is an important basic chemical raw material, and at the same time it can be used as automobile fuel and fuel additive. Traditional ethanol production mainly relies on the biological fermentation process of food crops and the chemical hydration production process of petroleum cracking ethylene. With the shortage of petroleum resources, the shortage of food supply, and the immaturity of the second-generation cellulose fermentation process, ethanol production from coal, s...

Claims

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Application Information

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IPC IPC(8): B01J23/83C07C31/08C07C29/149
Inventor 狄伟程继红田树勋何发泉孙琦
Owner CHNA ENERGY INVESTMENT CORP LTD
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