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Catalyst for synthesizing carboxylic ester with alcohol and carbon dioxide and its preparing method

A carbon dioxide and catalyst technology, which is applied in the field of catalysts and preparations for synthesizing carboxylic acid esters from alcohols and carbon dioxide, to achieve high catalytic efficiency, easy storage, and stable use effects

Active Publication Date: 2007-04-11
GUANGXI RES INST OF CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] But there is a common problem in this kind of reaction process, that is, the H produced in the reaction process 2 Inhibition balance shifts to the right, so remove H in time 2 is very critical

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Measure 10ml of Fe(NO 3 ) 3 , 20ml Cr(NO 3 ) 3 , 40ml Cu(NO 3 ) 2 , 40ml Al(NO 3 ) 3 , 10mlCo(NO 3 ) 3 , 20ml Zn(NO 3 ) 2 , 20ml Zr(NO 3 ) 3 1.0M solution, and then all the above solution was added to a 500ml separatory funnel and mixed evenly. Next, at constant temperature, mix the mixed aqueous solution with about 0.5M dilute ammonia solution so that the pH of the mixed solution is 7.5-12. After the mixing (dropping of the solution) is completed, age at room temperature for 1-3 hours. Then use vacuum filtration in the funnel to separate to obtain the filter cake. The prepared filter cake was washed with deionized water until NH-free 4 + and NO 3 - , and then keep the temperature in an oven at 110-130°C for 8-10 hours, and then transfer to a muffle furnace for calcination at 400-600°C for 4-8 hours to obtain a dry solid powder. After cooling, grind it into a 100-mesh powder, and use a tablet press to form a catalyst. The mass ratio of each metal is o...

Embodiment 2

[0023] Embodiment 2: with embodiment 1, just Cu (NO 3 ) 2 The dosage is changed to 60ml, Cr(NO 3 ) 3 Changed to 1M Cr(NO 3 ) 6 And the amount is changed to 20ml. The mass ratio of each metal is obtained as:

[0024] Fe:Cr:Cu:Al:Co:Zn:Zr=5:10:38:10:6:13:18

Embodiment 3

[0025] Embodiment 3: with embodiment 2, just Cu (NO3 ) 2 The dosage is changed to 20ml. The mass ratio of each metal is obtained as:

[0026] Fe:Cr:Cu:Al:Co:Zn:Zr=7:13:18:14:7:17:24

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PUM

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Abstract

The present invention discloses one kind of mixed metal oxide catalyst for catalyzing the reaction of alcohol and CO2 to synthesize carboxylate with carbon number doubling that of the alcohol. The mixed metal oxide catalyst is granular catalyst comprising oxides of Fe 5-20 wt%, Cr 10-30 wt%, Cu 10-40 wt%, Al 20-45 wt%, Co 2-10 wt%, Zn 15-35 wt% and Zr 5-30 wt%. The mixed metal oxide catalyst is used in catalyzing the reaction of alcohol and CO2 to synthesize carboxylate with carbon number doubling that of the alcohol, and the catalytic reaction has low reaction temperature, high alcohol conversion per pass, high carboxylate selectivity, high space-time yield and other advantages.

Description

technical field [0001] The invention relates to a catalyst for mixed metal oxides, in particular to a catalyst for synthesizing carboxylate with alcohol and carbon dioxide and a preparation method thereof. Background technique [0002] Carboxylate compounds are a class of chemical products that people have used earlier. Because of their wide range of uses, the total annual consumption in the world exceeds 10 million tons, and the total amount is gradually increasing every year. Therefore finding the method for the production of carboxylate compounds that is fast, efficient, low in equipment investment, free of waste, etc. has always been a research hotspot in various countries. Traditionally, carboxylate compounds are synthesized from alcohols and carboxylic acids through sulfuric acid-catalyzed liquid-phase esterification. Due to this method, there are many side reactions, serious corrosion of equipment, and the difficulty of disposal of three wastes, which damages the envi...

Claims

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Application Information

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IPC IPC(8): B01J23/86B01J23/70B01J23/835B01J23/80C07C67/36C07C67/00C07C69/04C07C69/06
Inventor 黄科林杨波周纯海陈文纳孙果宋宁红
Owner GUANGXI RES INST OF CHEM IND CO LTD
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