Catalyst for preparing ethylene glycol through dimethyl oxalate gas phase hydrogenation, and preparation method and application thereof

A dimethyl oxalate and catalyst technology, which is applied in the field of preparation of ethylene glycol catalysts by hydrogenation of dimethyl oxalate, can solve the problems of easy loss of active components, inability to exert activity, and easy coking, etc., and achieve the suppression of impurity products The formation, stable bed temperature, and high space-time yield

Inactive Publication Date: 2016-07-06
SHANGHAI HUAYI ENERGY CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] According to literature reports, for porous catalysts, the pore size can be divided into four types according to different sizes: 1) coarse channels where the active components are easy to lose; Although it can enter, the intermediate compound or product is limited by the space and is easy to coke the fine channel; 4) when the active component content is high, it is basically blocked by the precipitated active precursor, so that the activity cannot be exerted.

Method used

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  • Catalyst for preparing ethylene glycol through dimethyl oxalate gas phase hydrogenation, and preparation method and application thereof
  • Catalyst for preparing ethylene glycol through dimethyl oxalate gas phase hydrogenation, and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0047] Preparation of dimethyl oxalate gas-phase hydrogenation to produce ethylene glycol catalyst, the composition is CuO48wt%, SiO 2 50wt% and NiO2.0wt%; the preparation process is as follows:

[0048] Weigh SiO first 2 Add 5.0Kg of silica sol with a content of 25%, add 4.8Kg of deionized water, mix well, weigh 2.7Kg of urea to dissolve in it, mix well, and adjust the pH to 6.0 with concentrated nitric acid. 9.6Kg of copper nitrate solution of 10.0wt% Cu was weighed again, and 194g of solid nickel nitrate was weighed and dissolved in the copper nitrate solution. Then the two solutions were mixed evenly and poured into the reactor together. The reaction kettle was heated with a water bath, the reaction temperature was raised to 95° C., the stirring speed was adjusted to 300 rpm, and the reflux condensation was performed for 10 hours. The suspension after the reaction was taken out, filtered with a filter press, and the filtered cake was washed with deionized water until th...

Embodiment 2

[0051] Preparation of dimethyl oxalate gas-phase hydrogenation to produce ethylene glycol catalyst, the composition is CuO20wt%, SiO 2 79wt% and Na 2 O1.0wt%; The preparation process is as follows:

[0052] Weigh SiO first 2 Add 6.6Kg of silica sol with a content of 30%, add 9.3Kg of deionized water, mix well, weigh 1.2Kg of urea to dissolve in it, mix well, and adjust the pH to 1.0 with concentrated nitric acid. 5.0Kg of 8.0wt% Cu copper nitrate solution was weighed again, and 34.3g of solid sodium nitrate was weighed and dissolved in the copper nitrate solution. Then the two solutions were mixed evenly and poured into the reactor together. The reaction kettle was heated with a water bath, the reaction temperature was raised to 85° C., the stirring speed was adjusted to 300 rpm, and reflux condensed for 26 hours. The suspension after the reaction was taken out, filtered with a filter press, and the filtered cake was washed with deionized water until the washing liquid was...

Embodiment 3

[0055] Preparation of dimethyl oxalate gas-phase hydrogenation to produce ethylene glycol catalyst, the composition is CuO70wt%, SiO 2 25wt% and ZnO5.0wt%; the preparation process is as follows:

[0056] Weigh SiO first 2 Add 2.5Kg of silica sol with a content of 25%, add 4.5Kg of deionized water, mix well, weigh 3.9Kg of urea, dissolve in it, mix well, and adjust the pH to 3.0 with concentrated nitric acid. 11.1Kg of copper nitrate solution of 12.6wt% Cu was weighed again, and 458g of solid zinc nitrate was weighed and dissolved in the copper nitrate solution. Then the two solutions were mixed evenly and poured into the reactor together. The reaction kettle was heated with a water bath, the reaction temperature was raised to 75° C., the stirring speed was adjusted to 300 rpm, and the reflux condensation was performed for 35 hours. The suspension after the reaction was taken out, filtered with a filter press, and the filtered cake was washed with deionized water until the w...

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Abstract

The invention relates to a catalyst for preparing ethylene glycol through dimethyl oxalate gas phase hydrogenation. The catalyst comprises the following components, by mass: 20-70 wt% of CuO, 25-79 wt% of SiO2, and 1.0-5.0wt% of oxide of a metal auxiliary agent. The catalyst has a specific surface area of 100-500m<2>/g, a pore volume of 0.3-1.5mL/g, and a pore size of 1.0-15.0nm. According to the invention, a pore-expanding agent and an environment-friendly auxiliary agent are added during a preparation process, such that the pore structure of the catalyst is effectively improved. When the prepared catalyst is used in a reaction for preparing ethylene glycol through oxalate gas phase hydrogenation, catalyst activity and ethylene glycol selectivity can be effectively improved; catalyst bed layer temperature can be stabilized; impurity generation can be significantly inhibited; no adverse influence is caused on the mechanical strength of the catalyst; and the wear resistance of the catalyst is improved. The service life of the catalyst can be longer than 1 year, such that the needs of industrial production can be satisfied.

Description

technical field [0001] The invention relates to a preparation method of a catalyst for preparing ethylene glycol by hydrogenation of dimethyl oxalate, and belongs to the field of catalyst preparation. Background technique [0002] Ethylene glycol, also known as glycol, is a colorless, odorless, sweet liquid that can dissolve in water in any proportion. Ethylene glycol has a wide range of uses and is an important organic chemical synthesis raw material. It is mainly used in the manufacture of polyester fibers, antifreeze, non-ionic surfactants, ethanolamine and explosives, etc. It is also used in the preparation of low freezing point coolants (for engines) , and can also be used directly as a solvent. In addition, it is also widely used in the tobacco industry, textile industry and cosmetic industry. [0003] At present, the method for producing ethylene glycol at home and abroad is mainly petroleum-ethylene-ethylene oxide route. The direct hydration method of ethylene oxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J23/78B01J23/80B01J23/89B01J23/889C07C29/149C07C31/18
CPCY02P20/52
Inventor 王群郭平均山炜巍施春辉肖本端金生亚
Owner SHANGHAI HUAYI ENERGY CHEM
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