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Method for producing glycol product by separating synthetic gas

A technology of ethylene glycol and synthesis gas, which is applied in the preparation of organic compounds, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problem that the synthesis gas to ethylene glycol product does not involve separation process reports and other problems

Active Publication Date: 2012-03-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the synthesis gas to ethylene glycol product does not involve the problem reported in the separation process, and a new method for separating the synthesis gas to ethylene glycol product is provided

Method used

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  • Method for producing glycol product by separating synthetic gas
  • Method for producing glycol product by separating synthetic gas
  • Method for producing glycol product by separating synthetic gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] according to figure 1 In the process shown, the product of synthesis gas to ethylene glycol is used as raw material 7, and raw material 7 enters the 40th plate of the fraction cutting tower 1 with a theoretical plate number of 60, the operating pressure is 20KPa, the reflux ratio is 2, and the top extraction control No methyl glycolate, no 1,2-propanediol in the side stream control, no dimethyl oxalate in the bottom stream control, a methanol-rich mixture 8 is obtained at the top of the tower, and glycolic acid is extracted from the 45th plate in the side stream The mixture 9 of methyl ester and dimethyl oxalate, the tower still obtains the heavy component 10 that is rich in ethylene glycol; The theoretical plate and the top enter, the operating pressure is 10KPa, the mass ratio of the entrainer to the feed is 0.1, and the output stream of the tower kettle is controlled to contain no 1,2-propanediol. After the tower top steam is condensed, it enters the phase separator ...

Embodiment 2

[0016] according to figure 1In the process shown, the product of synthesis gas to ethylene glycol is used as raw material 7, and raw material 7 enters the 50th plate of the fraction cutting tower 1 with a theoretical plate number of 80, the operating pressure is 5KPa, the reflux ratio is 0.5, and the top extraction control No methyl glycolate, no 1,2-propanediol in the side stream control, no dimethyl oxalate in the bottom stream control, a methanol-rich mixture 8 is obtained at the top of the tower, and glycolic acid is extracted from the 45th plate in the side stream The mixture 9 of methyl ester and dimethyl oxalate, the tower still obtains the heavy component 10 that is rich in ethylene glycol; The theoretical plate and the top enter, the operating pressure is 5KPa, the mass ratio of the entrainer to the feed is 0.05, and the output stream of the tower kettle is controlled to contain no 1,2-propanediol. After the tower top steam is condensed, it enters the phase separator ...

Embodiment 3

[0018] according to figure 1 In the process shown, the product of synthesis gas to ethylene glycol is used as raw material 7, and raw material 7 enters the 12th plate of the fraction cutting tower 1 with a theoretical plate number of 20, the operating pressure is 50KPa, the reflux ratio is 5, and the top extraction control No methyl glycolate, no 1,2-propanediol in the side stream control, no dimethyl oxalate in the bottom stream control, a methanol-rich mixture 8 is obtained at the top of the tower, and glycolic acid is extracted from the 15th plate in the side stream The mixture 9 of methyl ester and dimethyl oxalate, the tower still obtains the heavy component 10 that is rich in ethylene glycol; The theoretical plate and the top enter, the operating pressure is 50KPa, the mass ratio of the entrainer to the feed is 0.5, and the output stream of the tower kettle is controlled to contain no 1,2-propylene glycol. After the tower top steam is condensed, it enters the phase separ...

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Abstract

The invention relates to a method for producing a glycol product by separating synthetic gas, which mainly solves the problem of no relative separation technology report on the glycol products prepared by synthetic gas. The method of the invention comprises the following steps: the glycol product prepared by synthetic gas enters in a fraction cutting tower (1) for separating, a material flow I is obtained from the top of the tower, a material flow II is collected from the side stream, a material flow III is obtained from a tower kettle; the material flow III and an entrainer I enter in a first azeotropic rectification tower (2) for separating, a glycol solution comprising 1,2-propylene glycol is collected from the top of the tower, a material flow IV is obtained from the tower kettle; the material flow IV and an entrainer II enter in a second azeotropic rectification tower (3) for separating, a material flow V is collected from the top of the tower, the glycol solution comprising 1,2-butylene glycol is obtained from the tower kettle; a material flow V enters in a central section of a product tower (4), the glycol solution comprising light components is collected from the top of the tower, and a glycol product is obtained from the tower kettle. The technical scheme better solves the problem, and can be used in industrial production for separating glycol products by synthetic gas.

Description

technical field [0001] The invention relates to a method for separating synthesis gas to produce ethylene glycol products. 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, large-scale ethylene glycol production at home and abroad adopts the process route of direct hydration or pressurized hydration. This process is to prepare a mixed aqueous solution of ethylene oxide and water at a ratio of 1:20 to 22 (molar ratio) in a fixed bed. React in the reactor at 130-180°C, 1.0-2.5MPa for 18-30 minutes, all ethylene oxide is c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/20C07C29/80C07C29/82
Inventor 杨为民肖剑钟禄平郭艳姿
Owner CHINA PETROLEUM & CHEM CORP
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