Purification technique for coal glycol rude products

A coal-to-ethylene glycol and crude product technology, applied in the chemical industry, can solve the problems of not effectively reducing the content of aldehydes and ketones, and achieve the effects of high catalyst utilization, energy saving, and easy operation
CN101928201AActive Publication Date: 2010-12-29SHANGHAI HUAYI ENERGY CHEM
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI HUAYI ENERGY CHEM
Publication Date
2010-12-29

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Abstract

The invention belongs to the technical field of chemical industry, in particular to a purification technique for coal glycol rude products. According to the technique, saponification, carbinol-removal, hydrogenation reaction, three-column distillation and absorption treatment are utilized to prepare the glycol with a mass percent more than 99.9% from the coal glycol rude products and the polyester glycol products having high transmissivity to the ultraviolet with wavelength between 220 and 350 mm. The purification technique for coal glycol rude products of the invention is characterized by low energy consumption, easy operation and high efficiency.
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Description

technical field

[0001] The invention belongs to the technical field of chemical industry, and in particular relates to a purification process of a crude product of ethylene glycol produced from coal. Background technique

[0002] Ethylene glycol is an important organic chemical raw material, which can react with terephthalic acid (PTA) to produce polyethylene terephthalate (PET, or PET), which can be used as a raw material for polyester fibers and polyester plastics. Polyester resin), which is currently the most important use of ethylene glycol, but only ethylene glycol with higher purity can be used to manufacture polyester resins, so the purity of the synthetic ethylene glycol crude product should be tested. The crude ethylene glycol product whose purity cannot meet the requirements needs to be purified before it can be applied to the preparation of polyethylene terephthalate.

[0003] The impurities in the crude ethylene glycol product will greatly affect the ultraviolet...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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