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Method for improving glycol product quality

A product quality, ethylene glycol technology, applied in chemical instruments and methods, bulk chemical production, organic compound preparation, etc., can solve problems such as complex operation, high catalyst production cost, and difficulty in large-scale reactors, and achieve good results The effect of technical effects

Active Publication Date: 2014-09-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the disadvantages of high catalyst production cost, difficulty in increasing the size of the reactor, and complicated operation.

Method used

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  • Method for improving glycol product quality

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021]Put the catalyst with alumina as the carrier, the content of metal nickel as 20% of the weight of the carrier, and the content of magnesium as the metal additive as 1.5% of the weight of the carrier into the gas-liquid phase fixed-bed reactor, and the volume content of hydrogen gas is 90%. The mixed gas of hydrogen and nitrogen, at a pressure of 0.3MPa, a maximum temperature of 450°C, and a volumetric space velocity of 1000h －1 Under the conditions of the reduction treatment for 12 hours, after the reduction is completed, it is lowered to the reaction temperature, and then ethylene glycol product raw materials with a purity of 99.8% are respectively introduced from the bottom of the reactor (ultraviolet permeability of the raw materials) obtained by hydrogenation of dimethyl oxalate The light rate is shown in Table 1) and hydrogen, at a reaction temperature of 80°C, a reaction pressure of 0.4MPa, and an hourly space velocity of ethylene glycol liquid of 15h -1 , The volu...

Embodiment 2

[0024] Load the gas-liquid phase fixed-bed reactor with alumina as the carrier, the metal nickel content as 10% of the carrier weight, the metal palladium content as 0.8% of the carrier weight, and the metal additive barium content as 0.8% of the carrier weight , feed pure hydrogen, at a pressure of 0.1MPa, a maximum temperature of 500°C, and a volumetric space velocity of 800h －1 Under the conditions of the reduction treatment for 8 hours, after the reduction is completed, it is lowered to the reaction temperature, and then the ethylene glycol product raw materials with a purity of 99.2% are respectively introduced into the reactor from the top of the reactor (the ultraviolet permeability of the raw material The light rate is shown in Table 1) and hydrogen, at a reaction temperature of 90°C, a reaction pressure of 0.6MPa, and an hourly space velocity of ethylene glycol liquid of 10h -1 , hydrogen and raw material volume ratio of 50 under the condition of contact with the cata...

Embodiment 3

[0027] Put alumina as the carrier, the metal nickel content is 40% of the carrier weight, the metal additive magnesium content is 1% of the carrier weight, and the metal additive molybdenum content is 0.1% of the carrier weight. The catalyst is loaded into a gas-liquid phase fixed bed In the reactor, a mixed gas of hydrogen and nitrogen with a hydrogen volume content of 70% is introduced, at a pressure of 0.6MPa, a maximum temperature of 480°C, and a volume space velocity of 1500h －1 Under the conditions of the reduction treatment for 16 hours, after the reduction is completed, it is lowered to the reaction temperature, and then the ethylene glycol product raw material with a purity of 99.9% is respectively introduced from the bottom of the reactor (the ultraviolet The light transmittance is shown in Table 1) and hydrogen, at a reaction temperature of 95°C, a reaction pressure of 0.5MPa, and an hourly space velocity of ethylene glycol liquid of 40h -1 , The volume ratio of hyd...

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Abstract

The invention relates to a method for improving glycol product quality, and mainly solves the technical problem of low ultraviolet light transmittance of glycol products in the prior art of. According to the method, under the conditions of the reaction temperature of 70 DEG to 130 DEG C, the reaction pressure of 0.05-1.0MPa, the glycol liquid hourly space velocity of 2-60H <-1> and the volume ratio of hydrogen to raw material of 1-50, an unqualified glycol raw material with glycol content greater than 99% and low ultraviolet light transmittance and hydrogen passes through a gas and liquid phase fixed bed reactor to contact a catalyst in a reactor to obtain a polyester grade glycol product flow, the catalyst uses alumina as a carrier, uses at least one substance selected from nickel or palladium as an active ingredient, and uses at least one substance selected from magnesium, calcium, barium, molybdenum and cerium; by sue of the technical scheme, the technical problem of low ultraviolet light transmittance of the glycol products in the prior art can be well solved, and the method can be used in industrial production to improve the glycol product quality.

Description

technical field [0001] The invention relates to a method for improving the quality of ethylene glycol products, in particular to a method for improving the ultraviolet light transmittance of ethylene glycol products produced by hydrogenation of dimethyl oxalate or hydrogenation of diethyl oxalate. Background technique [0002] Ethylene glycol (EG) is an important basic organic raw material in petrochemical industry. It can be mixed with water in any proportion, and has a high boiling point and a low freezing point. Mainly used in the production of polyester fibers, antifreeze, unsaturated polyester resins, lubricants, plasticizers, non-ionic surfactants and explosives, etc., in addition to coatings, photographic developers, brake fluids and inks and other industries, It is used as a solvent and medium for ammonium perborate, used in the production of special solvents such as glycol ether, etc., and has a wide range of uses. [0003] At present, the production of ethylene gl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/20C07C29/90
CPCY02P20/52C07C29/90C07C31/202
Inventor 孙凤侠刘国强
Owner CHINA PETROLEUM & CHEM CORP
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