System and method for ethylene glycol rectification in production of ethylene glycol from syngas

A technology of ethylene glycol and synthesis gas, which is applied in the field of ethylene glycol rectification, can solve the problems of substandard products and high energy consumption in the rectification section, and achieve the effect of improving the recovery rate and reducing the steam consumption.

Active Publication Date: 2019-07-02
NINGBO JINYUANDONG PETROCHEM ENG TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] The first object of the present invention is to provide a system for the rectification of ethylene glycol in synthesis gas to ethylene glycol, which overcomes the high energy consumption of the synthesis gas to ethylene glycol rectification section and substandard products in the above-mentioned prior art. shortcoming

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  • System and method for ethylene glycol rectification in production of ethylene glycol from syngas

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Embodiment 1

[0047] A method for the rectification of ethylene glycol in the production of ethylene glycol from synthesis gas, comprising the following steps:

[0048] (1) Crude ethylene glycol containing more methanol from the hydrogenation unit (for example, 87.6% methanol, 0.8% ethanol, 0.1% 1,2-butanediol, 10.9% ethylene glycol, 0.5% water) After heat exchange between the heat exchanger and the ethylene glycol product, it enters the lower part of the methanol recovery tower A. The reboiler of the methanol recovery tower A uses 0.05MPaG steam, and the refined methanol is extracted from the top of the tower by vacuum distillation, and enters the methanol recovery tower A through condensation. Refined methanol storage tank, the mixed solution containing ethylene glycol in the tower tank enters the methanol recovery tower B;

[0049] (2) Crude ethylene glycol containing more ethylene glycol from the hydrogenation unit (for example, methanol 9.8%, ethanol 0.1%, 1,2-propanediol 0.1%, 2,3-but...

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Abstract

The invention discloses a system and a method for ethylene glycol rectification in the production of ethylene glycol from syngas. The system comprises a methanol recovery tower A, a methanol recoverytower B, a light component removal tower, a dealcoholization tower, an ethylene glycol product tower, a heavy component removal tower, a light component recovery tower, an ethylene glycol recovery tower, an ethanol tower and a refining reactor. Rectification, adsorption and other diversified technologies are adopted to improve the recovery rate, quality and quality product rate of ethylene glycol;a thermal network is adopted to carry out energy saving optimization on the system, so the steam consumption is reduced; and all the components in crude ethylene glycol are finely cut and fully recovered to obtain high-quality methanol, ethanol and ethylene glycol and also obtain heavy diol and light diol byproducts.

Description

technical field [0001] The invention relates to the technical field of ethylene glycol rectification, in particular to a system and method for ethylene glycol rectification in the production of ethylene glycol from syngas. Background technique [0002] Ethylene glycol is an important organic chemical raw material, mainly used to produce polyester fiber (PET), plastics, rubber, polyester paint, adhesives, non-ionic surfactants, ethanolamine and explosives, and also used in large quantities as solvents, lubricants Agents, plasticizers and antifreeze, etc., are widely used. [0003] The production capacity of ethylene glycol in the world is mainly concentrated in the Middle East and Asia. The Middle East has advantages in raw materials, while Asia is the main consumer market. The Middle East is the main export region of ethylene glycol in the world, and its export volume accounts for more than 90% of the total output. my country is the main importer of ethylene glycol in the w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/76C07C31/20C07C31/04C07C31/08
CPCC07C29/76C07C31/202C07C31/04C07C31/08C07C31/205C07C31/207Y02P20/50C07C31/20
Inventor 高岚刘太泽岑旭江
Owner NINGBO JINYUANDONG PETROCHEM ENG TECH
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