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Ethylene glycol composition

A technology of ethylene glycol and composition, which is applied in the field of ethylene glycol composition obtained by hydrogenation of oxalate, which can solve the problems of high production cost and single source of raw materials for the production of ethylene glycol composition

Inactive Publication Date: 2016-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is that the source of raw materials for the production of ethylene glycol composition in the prior art is single and the production cost is high. A kind of ethylene glycol composition is provided, especially the ethylene glycol composition prepared by oxalate Diol composition, which has the advantages of high purity, low raw material cost, and high product quality, and is suitable for the production of polyester resin, antifreeze, and unsaturated resin. The method has high atomic efficiency and is environmentally friendly.

Method used

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Embodiment 1

[0069] Combine below figure 1 Schematic of the reaction-separation system shown. At a reaction temperature of 150-300°C and a reaction pressure of 2.0-4.5 MPa, the mixed raw material of dimethyl oxalate and hydrogen passes through a fixed bed filled with catalyst, and the reaction produces methanol, ethanol, water, dimethyl ether, carbonic acid Vinyl ester, methyl glycolate, 1,2-propanediol, 1,2-butanediol, ethylene glycol monomethyl ether, diethylene glycol and their mixtures of crude ethylene glycol products, the catalyst contains Cu-based catalysts on silica. The unreacted hydrogen is recovered by gas-liquid separation and recycled to the reaction system, and the liquid phase product obtained by gas-liquid separation enters the product separation and refining system.

[0070] The specific implementation is as follows:

[0071]The feed 1 of hydrogen and dimethyl oxalate passes through the raw material gasifier E1 and enters the hydrogenation reactor R1 after being vaporiz...

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Abstract

The invention relates to an ethylene glycol composition includes at least 99.0 wt% of ethylene glycol and 0.1-1000 wppm of ethylene carbonate. The invention mainly solves problems of single raw material source and high production cost in production of the ethylene glycol composition in the prior art. The invention provides the ethylene glycol composition, and especially, the ethylene glycol composition produced by hydrogenation on oxalate. The ethylene glycol composition can be used for preparing polyester resin, anti-freezing solutions and unsaturated resin, is wide in sources of raw materials, is low in production cost, and is high in quality of ethylene glycol composition.

Description

field of invention [0001] The invention relates to an ethylene glycol composition, in particular to an ethylene glycol composition obtained by hydrogenating oxalate. Background technique [0002] Ethylene glycol is an important chemical raw material and strategic material for the manufacture of polyester (which can be further produced for polyester, beverage bottles, films), explosives, glyoxal, and can be used as antifreeze, plasticizer, hydraulic fluid and solvent, etc. . In 2012, the global consumption of ethylene glycol was about 22 million tons, of which 84.7% was used to produce PET resin, 8.1% was used as antifreeze, and 98.5% of ethylene glycol was produced through ethylene oxide hydration process. In the past six years, China's ethylene glycol self-sufficiency rate has been less than 30% for a long time; in 2013, China's ethylene glycol production was 3.74 million tons, consumption was 11.71 million tons, and import volume reached 8.24 million tons, and the import ...

Claims

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Application Information

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IPC IPC(8): C07C31/20C07C29/149
CPCY02P20/582
Inventor 杨卫胜胡松郭毅
Owner CHINA PETROLEUM & CHEM CORP
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