Purification method for glycol

A technology of ethylene glycol and crude products, applied in chemical instruments and methods, preparation of organic compounds, separation/purification of hydroxyl compounds, etc., can solve the problems of low UV transmittance and poor quality, and improve UV transmittance. , less impurities, improve the effect of UV transmittance

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

[0011] The purpose of the present invention is to provide a method for purifying ethylene glycol to solve the problems of low UV transmittance and poor quality in some ethylene glycol products, so that it can achieve efficient purification and significantly improve the UV transmittance of ethylene glycol. light rate

Method used

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  • Purification method for glycol

Examples

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Comparison scheme
Effect test

preparation example 1

[0048] Preparation of composite hydrogenation catalyst CAT-1:

[0049] (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;

[0050] (2) take by weighing the epoxy curing system prepared in 40g step (1) and 180g nickel-aluminum alloy powder and fully stir and mix, Ni content is 48wt% in the nickel-aluminum alloy powder, and aluminum content is 52wt%, gets appropriate mixture and joins in In the cylindrical mould, press with a flat vulcanizer for 30mins at a temperature of 120°C and a pressure of 7MPa, then press with a flat vulcanizer for 90mins at a temperature of 150°C and a pressure of 7MPa, and take it out after cooling to obtain a granular catalyst precursor;

[0051] (3) Measure 100ml of catalyst precurs...

preparation example 2

[0054] Preparation of composite hydrogenation catalyst CAT-2:

[0055] (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;

[0056] (2) Take by weighing 50g of the epoxy curing system prepared in step (1) and 150g of nickel-aluminum alloy powder and fully stir and mix, the Ni content in the nickel-aluminum alloy is 48wt%, and the aluminum content is 52wt%, and an appropriate amount of mixture is added to the cylinder In the shaped mold, press with a flat vulcanizer for 30mins at a temperature of 120°C and a pressure of 7MPa, and press for 90mins with a flat vulcanizer at a temperature of 150°C and a pressure of 7MPa, and take it out after cooling to obtain a granular catalyst precursor;

[0057] (3) Measure 1...

Embodiment 1

[0060] The ethylene glycol liquid first passes through the bed of coconut shell charcoal at a temperature of 30°C and normal pressure, and the space velocity of the ethylene glycol liquid phase is 6.0h -1 ; Then put the composite hydrogenation catalyst CAT-1 50ml into the fixed bed reactor, use the fixed bed reactor for hydrogenation refining, the inner diameter of the tube is 25mm, the hydrogen flow rate is 200ml / min, the reaction temperature is 100°C, the pressure is 0.5MPa, Alcohol liquid space velocity 6.0h -1 , UV light transmittance of raw materials before hydrogenation: 0.1% at 220nm, after hydrogenation, the ultraviolet light transmittance of the product was measured with a UV spectrophotometer, see Table 1.

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Abstract

The invention provides a purification method for glycol. The purification method comprises the following steps: (1) physical adsorption: allowing a crude glycol product to pass through an active carbon bed for physical adsorption so as to obtain a first material flow; and (2) hydrofinishing: subjecting the first material flow, hydrogen and a compound hydrogenation catalyst to a contact reaction, wherein the composite hydrogenation catalyst comprises continuous-phase carbon and dispersion-phase Raney alloy particles, the dispersion-phase Raney 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 can realize high-efficiency purification and substantially improves the UV transmittance of glycol.

Description

technical field [0001] The invention relates to the technical field of ethylene glycol purification, more specifically, to a method for purifying 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 polyester c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/74C07C29/76C07C29/90C07C29/80C07C31/20B01J25/02B01J27/22
CPCB01J25/02B01J27/22C07C29/74C07C29/76C07C29/80C07C29/90C07C31/202Y02P20/52
Inventor 鲁树亮蒋海斌王秀玲张晓红吴佳佳郝雪松徐洋彭晖乔金樑
Owner CHINA PETROLEUM & CHEM CORP
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