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Preparation method of catalyst carrier for producing ethylene glycol from hydrogenation of oxalic ester

A technology of catalyst carrier and ethylene glycol, which is applied in the direction of catalyst carrier, chemical instrument and method, metal/metal oxide/metal hydroxide catalyst, etc.

Active Publication Date: 2010-10-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that the catalyst carrier that exists in the previous literature has a small specific surface area, low activity and poor stability. A new oxalic acid Method for preparing catalyst carrier for ester hydrogenation to produce ethylene glycol

Method used

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  • Preparation method of catalyst carrier for producing ethylene glycol from hydrogenation of oxalic ester

Examples

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Embodiment 1

[0020] Dissolve 23.5 grams of aluminum nitrate with 9 water molecules in 500 milliliters of deionized water, neutralize the aluminum nitrate solution with 30% ammonia water as a precipitant, control the reaction temperature to 60°C, and control the pH value at the end of the reaction to 6.5. The alumina carrier gel is then mixed with the copper active matrix and stirred for 30 minutes, then the slurry is filtered and washed. The resulting filter cake is dried at 80-120°C for 24 hours, and then at 260-420°C After calcining for 5 hours, the calcined catalyst is stirred into graphite to form the finished catalyst.

Embodiment 2

[0022] Dissolve 16.9 grams of aluminum nitrate with 9 water molecules in 500 ml of deionized water, neutralize the aluminum nitrate solution with 10% sodium bicarbonate as a precipitant, control the reaction temperature to 70°C, and control the pH value at the end of the reaction 7.5 Make carrier alumina gel, then mix this gel with copper and chromium active matrix, stir for 30 minutes, and then filter and wash the slurry. The filter cake obtained is dried at 80~120℃ for 24 hours, and then It is calcined at 260-420°C for 5 hours, and the calcined catalyst is stirred into graphite to form the finished catalyst.

Embodiment 3

[0024] Dissolve 29.5 grams of aluminum nitrate with 9 water molecules in 500 ml of deionized water, neutralize the aluminum nitrate solution with 20% potassium hydroxide solution as a precipitant, control the reaction temperature to 80°C, and control the pH value at the end of the reaction The carrier alumina gel is made into 8.2, then the gel is mixed with copper and manganese active matrix, stirred for 30 minutes, then the slurry is filtered and washed, and the obtained filter cake is dried at 80-120°C for 24 hours, and then It is calcined at 260-420°C for 5 hours, and the calcined catalyst is stirred into graphite to form a finished catalyst.

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Abstract

The invention relates to a preparation method for producing a catalyst carrier used in glycol production by hydrogenating oxalic ester, mainly solving the technical problems of low specific surface of catalyst prepared by a carrier, low activity and poor stability of the prior art. The preparation method well solves the problems by mainly adopting the following steps: (a) soluble aluminum salt solution I is prepared; (b) solution II prepared by at least one of carbonate, supercarbonate, alkali metal hydroxid, or inorganic ammonia is used as a precipitation reagent; and (c) the solution I is mixed with the solution II, a reaction temperature is controlled to range from 50 to 95 DEG C, the pH value of a reaction terminal is controlled to range from 5.5 to 9, and finally, the technical scheme used for the catalyst carrier used in the glycol production by hydrogenating the oxalic ester is obtained after reaction. The preparation method can be applicable to the industrial production of theglycol.

Description

technical field [0001] The invention relates to a method for preparing a catalyst carrier for hydrogenation of oxalate to produce ethylene glycol, in particular to a method for preparing a catalyst carrier for catalytic 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 co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J23/83B01J23/889C07C31/20C07C29/12
CPCY02P20/52
Inventor 刘俊涛孙凤侠朱志焱蒯骏
Owner CHINA PETROLEUM & CHEM CORP
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