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Method for purifying ethylene glycol product

A technology for ethylene glycol and products, applied in the field of ethylene glycol product purification

Active Publication Date: 2012-08-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for purifying ethylene glycol product
  • Method for purifying ethylene glycol product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～9

[0018] Load 100 grams of 35% Cu+5% Zn / SiO by catalyst weight in a fixed bed reactor 2 The copper-containing solid oxide catalyst is passed into the ethylene glycol product raw material obtained by the hydrogenation of dimethyl oxalate, and the purity is 99.8% (the ultraviolet transmittance of the raw material is as shown in Table 1), at a temperature of 150 ° C, a pressure of 2.0 MPa, airspeed 10 hours -1 , under the condition that the hydrogen / alcohol molar ratio is 5:1, pass through the copper-containing solid oxide catalyst, contact with the catalyst, and obtain the purified ethylene glycol effluent, and the result after rectification is shown in the following table:

[0019] Table 1

[0020]

Embodiment 10～18

[0022] Load 100 grams of 40% Cu+10% Zn / SiO by catalyst weight in a fixed bed reactor 2 The copper-containing solid oxide catalyst is passed through the ethylene glycol product obtained by the hydrogenation of dimethyl oxalate as a raw material, and the purity is 99.8% (the ultraviolet transmittance of the raw material is 6 at 220nm, 91 at 275nm, and 91 at 350nm. 96), the results obtained under different reaction conditions are shown in the table below:

[0023] Table 2

[0024]

Embodiment 19

[0026] Load 100 grams of 20% Cu+5% Ni / SiO by catalyst weight in a fixed bed reactor 2 The copper-containing solid oxide catalyst is passed through the ethylene glycol product obtained by hydrogenation of diethyl oxalate as a raw material, and the purity is 99.9% (the ultraviolet transmittance of the raw material is 3 at 220nm, 92 at 275nm, and 92 at 350nm. is 97), at a temperature of 190°C, a pressure of 2.0MPa, and a space velocity of 5 hours -1 , under the condition that the hydrogen / alcohol molar ratio is 2:1, pass through a copper-containing solid oxide catalyst, contact with the catalyst to obtain purified ethylene glycol effluent, and the result after rectification is: the ultraviolet transmittance is at 220nm 78, 96 at 275nm, and 100 at 350nm.

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Abstract

The invention relates to a method for purifying an ethylene glycol product, and mainly solves the technical problem in the prior art that ultraviolet transmittance rate of the ethylene glycol product is low. Through the adoption of the technical scheme that oxalic ester is hydrogenated to obtain an ethylene glycol product, and the ethylene glycol product serves as a raw material; and under the conditions that the temperature is 100 to 260 DEG C, the pressure is 0.1 to 6.0 MPa, the space velocity is 0.2 to 50 hours<-1>, and the mol ratio of hydrogen to ester is (0.1 to 40) : 1, the raw material is in contact reaction with a copper-contained solid oxide catalyst to obtain a purified ethylene glycol effluent, and the invention solves the problem well, and can be used in the industrial production of purifying the ethylene glycol product.

Description

technical field [0001] The invention relates to a method for purifying ethylene glycol products, in particular to a method for purifying ethylene glycol products in ethylene glycol products produced by hydrogenation of dimethyl oxalate or hydrogenation of diethyl oxalate. 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%. Al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/20C07C29/88B01J23/72
CPCY02P20/52
Inventor 刘俊涛张育红张琳娜
Owner CHINA PETROLEUM & CHEM CORP
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