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Method for improving quality of ethylene glycol product

A product quality, ethylene glycol technology, applied in chemical instruments and methods, bulk chemical production, preparation of organic compounds, etc.

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

AI Technical Summary

Problems solved by technology

At present, there are few published literature reports

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Adopt nickel solid oxide as catalyzer, take the ethylene glycol product that dimethyl oxalate hydrogenation prepares as raw material, with ethylene glycol raw material, purity is 99.8% (the ultraviolet transmittance of raw material is 2,275nm place at 220nm place 91, 95 at 350nm), at a temperature of 60°C, a pressure of 1.0MPa, and a space velocity of 20 hours -1 , the hydrogen / alcohol ratio (hereinafter referred to as molar ratio) is 3: 1 under the condition of passing through the rotating packed bed reactor, contacting with the catalyst, and obtaining the effluent of ethylene glycol after the reaction; Wherein, the rotating speed of the rotating packed bed reactor is 500 rpm. The ethylene glycol product obtained after hydrogenation has an ultraviolet absorption rate of 78 at 220nm, 95 at 275nm, and 100 at 350nm after separation.

Embodiment 2

[0016] Adopt nickel solid oxide as catalyzer, take the ethylene glycol product that dimethyl oxalate hydrogenation prepares as raw material, with ethylene glycol raw material, purity is 99.8% (the ultraviolet transmittance of raw material is 2,275nm place at 220nm place 91, 95 at 350nm), at a temperature of 90°C, a pressure of 3.0MPa, and a space velocity of 50 hours -1 , under the condition that hydrogen / alcohol ratio is 10:1, pass through the rotating packed bed reactor, contact with the catalyst, and obtain the effluent of ethylene glycol after the reaction; wherein, the rotating speed of the rotating packed bed reactor is 800 rpm. The ethylene glycol product obtained after hydrogenation has an ultraviolet absorption rate of 77 at 220nm, 96 at 275nm and 100 at 350nm after separation.

Embodiment 3

[0018] Nickel solid oxide is adopted as catalyst, and the ethylene glycol product obtained by hydrogenation of dimethyl oxalate is used as raw material, and the ethylene glycol raw material has a purity of 99.9% (the ultraviolet transmittance of the raw material is 0 at 220nm, and 275nm) 90, 95 at 350nm), at a temperature of 40°C, a pressure of 1.0MPa, and a space velocity of 10 hours -1 , under the condition that the ratio of hydrogen / alcohol is 2:1, pass through the rotating packed bed reactor, contact with the catalyst, and obtain the effluent of ethylene glycol after the reaction; wherein, the rotating speed of the rotating packed bed reactor is 1000 rpm. The ethylene glycol product obtained after hydrogenation has an ultraviolet absorption rate of 79 at 220nm, 97 at 275nm, and 99 at 350nm after separation.

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Abstract

The invention relates to a method for improving the quality of an ethylene glycol product and mainly solves the technical problem of low ultraviolet transmission rate of the ethylene glycol product existing in the prior art. With the adoption of the technical scheme that the method for improving the quality of the ethylene glycol product comprises the following steps that ethylene glycol is taken as a raw material, and under the conditions that the temperature is 20-280 DEG C, the pressure is 0.1-4.0 MPa, the airspeed is 0.2-100.0 hour<-1>, and the molar ratio is (0.01-40):1, the raw material is in contact with a solid oxide catalyst in a rotating packed bed reactor for reaction to obtain an effluent containing the ethylene glycol, wherein the solid oxide catalyst adopts at least one of a copper catalyst, a nickel catalyst or a palladium catalyst, and the rotating speed of the rotating packed bed reactor is 300-500 revolutions / minute, so the problem is better solved. The method can be used in the industrial production for improving the quality of the ethylene glycol product.

Description

technical field [0001] The invention relates to a method for improving the quality of ethylene glycol products, in particular to a method for improving the quality of ethylene glycol products produced by hydrogenating dimethyl oxalate or hydrogenating 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. It has a wide range of uses, one of which is very important. Polyester (PET) is the basic raw material for the manufacture of polyester fibers, which are generally referred to as fiber grade glycol products. [0003] At present, large-scale ethylene glycol produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/20C07C29/90
CPCC07C29/90Y02P20/52C07C29/149C07C31/202
Inventor 刘俊涛张育红王万民
Owner CHINA PETROLEUM & CHEM CORP
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