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Catalyst for producing ethylene glycol from hydrogenation of oxalic ester

A technology of ethylene glycol and oxalate, which is applied in molecular sieve catalysts, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., and can solve problems such as poor stability, small catalyst specific surface area, and low activity. problems, to achieve long-term effects of stability

Active Publication Date: 2009-07-08
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is the problem that the catalyst has small specific surface area, low activity and poor stability in the prior art, and a new oxalate-added Catalyst for the production of ethylene glycol from hydrogen

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take 1 liter of a solution containing 0.9 mol / L copper nitrate and 0.2 mol / L barium nitrate as solution A, heat to 80°C for use, and use 3 liters of 1.1 mol / L sodium carbonate solution as solution B, heat to 70°C stand-by. Add solution A to solution B under stirring, control the temperature at 76°C during the neutralization process, and control the pH value at the end point to 7, thereby obtaining copper and barium active matrix slurry. 1 liter of a solution containing 10 grams of copper nitrate and 40 grams of aluminum nitrate was used as solution C, and 160 grams of potassium carbonate was dissolved in 2 liters of deionized water to make solution D. Add solution C to solution D under stirring, control the temperature at 80°C during the neutralization process, and control the final pH value to 7.3. Then the gel slurry is mixed with copper and barium active matrix slurry. After filtering and washing, the obtained filter cake was dried at 115°C, and then calcined at 31...

Embodiment 2

[0024] According to each step and condition of embodiment 1, only the composition of catalyst is 21%Cu+4%Cu 2 O+0.5%Zn / SiO 2 , using methanol as a solvent, dimethyl oxalate as a raw material, at a reaction temperature of 250°C, and a weight space velocity of 6 hours -1 , the hydrogen / ester molar ratio is 100: 1, the reaction pressure is 3.0MPa, and the mass percentage of dimethyl oxalate is under the condition of 35%, the conversion rate of dimethyl oxalate is 100%, the selectivity of ethylene glycol 85%.

Embodiment 3

[0026] According to each step and condition of embodiment 1, only the composition of catalyst is 15%Cu+10%Cr+1%Cu 2 O / Al 2 o 3 , using ethanol as a solvent, diethyl oxalate as a raw material, at a reaction temperature of 200°C, and a weight space velocity of 0.5 hours -1, the hydrogen / ester molar ratio is 100:1, the reaction pressure is 2.8MPa, and the mass percentage of diethyl oxalate is under the condition of 80%, the conversion rate of diethyl oxalate is 99%, the selectivity of ethylene glycol 90%.

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Abstract

The invention relates to a catalyst for ethanediol production by oxalic ester hydrogenation, which solves the problems of small specific surface, low activity and poor stability of the catalyst in the previous technique. The catalyst used in the invention is composed of the following active components, assistants and carriers in terms of parts by weight: (a) 5-80 parts of active components; (b) 0-40 parts of assistants and (c) 1-30 parts of carriers, wherein the active component is copper, copper oxide or mixture thereof, the assistant is selected from at least one of Zn, Mn, Ba, Cr, Ni or Fe or oxides thereof and the carrier is selected from at least one of the alumina, silica, zirconia or molecular sieve. When the active component is copper, the technical scheme that the value of (b) is more than zero solves the problem in a good way. The catalyst can be used for ethanediol production in the industry.

Description

technical field [0001] The invention relates to a catalyst for hydrogenation of oxalate to produce ethylene glycol, in particular to a catalyst for hydrogenation of dimethyl oxalate or diethyl oxalate to produce ethylene glycol. Background technique [0002] Ethylene glycol (EG) is an important organic chemical raw material, mainly used in the production of polyester fiber, antifreeze, unsaturated polyester resin, lubricant, plasticizer, nonionic surfactant and explosives, etc. It can be used in industries such as paint, photographic developer, brake fluid and ink, as a solvent and medium for ammonium perborate, and for the production of special solvents such as glycol ether, etc., and has a wide range of uses. [0003] At present, my country has surpassed the United States to become the world's largest consumer of ethylene glycol. From 2001 to 2006, the average annual growth rate of domestic apparent consumption reached 17.4%. Although my country's ethylene glycol producti...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01J23/83B01J23/86B01J29/46C07C31/20C07C29/12
CPCY02P20/52
Inventor 李斯琴刘俊涛王万民李蕾
Owner CHINA PETROLEUM & CHEM CORP
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