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Ethylene glycol hydrofining method

A technology of hydrofining and ethylene glycol, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of few catalytic active sites, difficult control of the preparation process, inactivity, etc., and achieve catalyst particles Good strength, improved UV transmittance, simple preparation

Active Publication Date: 2015-09-30
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN200710021418 discloses a catalyst for refining ethylene glycol by catalyst hydrogenation. The catalyst used is 1-3mm granular nickel aluminum alloy, which can play a very good effect, but the catalyst is irregular in shape, which will affect the catalyst strength. , will bring adverse effects such as catalyst bed liquid bias flow, and the catalyst has no other material support except metal, the preparation process is difficult to control, and it is easy to cause catalyst powder
The catalyst obtained by this method is easy to form, but because the Raney alloy is wrapped or covered by the high molecular polymer during the forming process, there are few catalytic active points, and its catalytic activity is very low or even inactive.

Method used

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  • Ethylene glycol hydrofining method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) 100 parts by mass of liquid epoxy resin (Baling Petrochemical, CYD-128), 85 parts by mass 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 and stirred evenly.

[0037] (2) Weigh 40g of the epoxy system prepared in step (1) and 180g of nickel-aluminum alloy powder and mix them thoroughly. The Ni content in the nickel-aluminum alloy is 48% (by weight), and the aluminum content is 52% (by weight). Take an appropriate amount Put the mixture into a cylindrical mold, mold it with a flat vulcanizer at a temperature of 120°C and a pressure of 7MPa for 30mins, and use a flat vulcanizer at a temperature of 150°C and a pressure of 7MPa for 90mins, and take it out after cooling to obtain granules Catalyst precursor;

[0038] (3) Measure 100ml of catalyst precursor, put it into a tube-type high-temperature electric...

Embodiment 2

[0041] (1) 100 parts by mass of liquid epoxy resin (Baling Petrochemical, CYD-128), 85 parts by mass 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 and stirred evenly.

[0042] (2) Weigh 50g of the epoxy system prepared in step (1) and 150g of nickel-aluminum alloy powder and mix them thoroughly. The Ni content in the nickel-aluminum alloy is 48% (by weight), and the aluminum content is 52% (by weight). Take an appropriate amount Put the mixture into a cylindrical mold, mold it with a flat vulcanizer at a temperature of 120°C and a pressure of 7MPa for 30mins, and use a flat vulcanizer at a temperature of 150°C and a pressure of 7MPa for 90mins, and take it out after cooling to obtain granules Catalyst precursor;

[0043] (3) Measure 100ml of catalyst precursor, put it into a tube-type high-temperature electric...

Embodiment 3

[0046] (1) Fully mix powdered phenolic resin and curing agent hexamethylenetetramine with a high-speed mixer, the weight ratio of hexamethylenetetramine to phenolic resin is 12 / 100; mix 100 grams of mixture with 350 grams of nickel aluminum alloy The powder is fully mixed with a high-speed mixer, and the Ni content in the nickel-aluminum alloy powder is 48% (weight), and the aluminum content is 52% (weight);

[0047] (2) Raise the temperature of the tablet press to 90°C, put the above materials into the mold and press on the tablet press to form a sheet with a thickness of 2mm; raise the temperature of the tablet press to 150°C, and refill the formed sheet Put it into the mold and solidify under the pressure of 5MPa on the tablet press for 10min; cut the cured 2mm thick sheet into small particles;

[0048] (3) Take 100ml of small particles and carbonize them in a tube-type high-temperature electric furnace with a heating rate of 10°C / min, a furnace temperature of 600°C, and ke...

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Abstract

The invention discloses an ethylene glycol hydrofining method which adopts a composite hydrogenation catalyst. The catalyst comprises continuous-phase carbon and disperse-phase Raney alloy particles, wherein the disperse-phase Raney alloy particles are uniformly or nonuniformly dispersed in the continuous-phase carbon. The catalyst particles have high strength and high catalytic activity, and obviously enhance the ultraviolet transmittance of the hydrogenated ethylene glycol.

Description

technical field [0001] The invention relates to a method for hydrogenation refining of ethylene glycol, in particular to a method for improving the ultraviolet transmittance of ethylene glycol products through catalytic hydrogenation. Background technique [0002] Ethylene glycol products contain trace amounts of unsaturated compounds such as carboxylic acids, aldehydes, and conjugated alkenals, resulting in low UV transmittance in the range of 220-350nm, which affects the quality of downstream products such as polyester. In order to increase the UV transmittance of ethylene glycol, trace unsaturated substances can be removed by hydrogenation, thereby increasing the UV transmittance of ethylene glycol products. At present, the national standard premium product index of the ultraviolet transmittance (UV value) of ethylene glycol products is 75% or more at 220nm, 92% or more at 275nm, and 99% or more at 350nm. [0003] Chinese patent CN200710021418 discloses a catalyst for re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/20C07C29/90B01J25/02
CPCY02P20/52
Inventor 乔金樑鲁树亮戴伟蒋海斌彭晖张晓红王红亚王国清
Owner CHINA PETROLEUM & CHEM CORP
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