Refining method for glycol

A kind of ethylene glycol and composite technology, which is applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc. It can solve the problems of low light transmittance and affecting the quality of downstream products such as polyester, and achieve high activity and low investment. Small, easy-to-handle effects

Active Publication Date: 2018-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In short, because ethylene glycol products contain trace amounts of unsaturated compounds such as carboxylic acids, aldehydes, and conjugated alkenes, the UV transmittance of the product in the range of 220-350nm is low, which affects the quality of downstream products polyester

Method used

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  • Refining method for glycol

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0047] Preparation of composite hydrogenation catalyst:

[0048] (1) 100 mass parts of liquid epoxy resin (Baling Petrochemical, CYD-128), 85 mass parts of curing agent methyltetrahydrophthalic anhydride (MeTHPA) (Guangdong Shengshida Technology and Trade Co., Ltd.), curing accelerator triethanolamine (TEA) (Tianjin Chemical Reagent No. 1 Factory) 1.5 parts by mass were stirred evenly;

[0049] (2) take by weighing 50g step (1) prepared epoxy resin solidification system and 150g nickel-aluminum alloy powder and fully stir and mix, Ni content is 48wt% in the nickel-aluminum alloy, and aluminum content is 52wt%, gets an appropriate amount of mixture and joins in In a cylindrical mould, press with a flat vulcanizer for 30 minutes at a temperature of 120°C and a pressure of 7 MPa, then press for 90 minutes with a flat vulcanizer at a temperature of 150°C and a pressure of 7 MPa, and take it out after cooling to obtain a granular catalyst precursor;

[0050] (3) Measure 100ml of c...

Embodiment 1

[0053] Put 3kg of crude ethylene glycol, 75g of coconut shell charcoal, and 75g of the composite hydrogenation catalyst prepared in Preparation Example 1 into a 5L intermittent high-pressure reactor, adjust the temperature to 90°C, the hydrogen pressure to 0.4MPa, and the autoclave speed to 100 rpm / min, the processing time is 5 hours. The UV transmittance of the raw material before hydrogenation: 3.2% at 220nm, and the UV transmittance of the product after hydrogenation was measured with a UV spectrophotometer, see Table 1.

Embodiment 2

[0055] Put 3kg of crude ethylene glycol, 50g of coconut shell charcoal, and 100g of the composite hydrogenation catalyst prepared in Preparation Example 1 into a 5L intermittent high-pressure reactor, adjust the temperature to 90°C, the hydrogen pressure to 0.4MPa, and the autoclave speed to 100 rpm / min, the processing time is 5 hours. The UV transmittance of the raw material before hydrogenation: 3.2% at 220nm, and the UV transmittance of the product after hydrogenation was measured with a UV spectrophotometer, see Table 1.

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Abstract

The invention provides a refining method for glycol. The method comprises a step of subjecting a compound hydrogenation catalyst, hydrogen, coconut shell charcoal and a crude glycol product to a contact reaction, wherein a mass ratio of the coconut shell charcoal to the compound hydrogenation catalyst is 1: 10 to 20: 1; the total mass of the coconut shell charcoal to the compound hydrogenation catalyst is 1 to 10 wt% of the mass of the crude glycol product; and the compound hydrogenation catalyst comprises continuous-phase carbon and dispersion-phase Raney alloy particles, the dispersion-phaseRaney alloy particles are uniformly or nonuniformly dispersed in the continuous-phase carbon, and the continuous-phase carbon is prepared by carbonizing carbonizable organic matters or mixtures thereof. The method provided by the invention is high in glycol product treatment efficiency, simple in treatment equipment and low in investment.

Description

technical field [0001] The invention relates to the technical field of ethylene glycol purification, and more specifically, to a method for refining ethylene glycol. Background technique [0002] Ethylene glycol is an important chemical raw material with a wide range of uses and can be used as a raw material for antifreeze and polyester fibers. Ethylene glycol can be mixed with water at will, and has a high boiling point and low freezing point. It is a very commonly used antifreeze agent. As an important organic chemical raw material, ethylene glycol is widely used in polyester chips, various antifreeze fluids, and coolants. , rosin ester, desiccant, softener and other preparation fields. [0003] Ethylene glycol is mainly used in the production of polyester and automobile antifreeze. The two consume more than 90% of the total amount of ethylene glycol, of which polyester accounts for 79.5% and antifreeze accounts for 12.4%. When ethylene glycol is used to produce polyeste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/90C07C31/20
CPCC07C29/90C07C31/202
Inventor 鲁树亮吴佳佳彭晖蒋海斌王秀玲张晓红乔金樑
Owner CHINA PETROLEUM & CHEM CORP
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