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Catalyst for preparing ethylene glycol through dimethyl oxalate hydrogenation and preparation method and application of catalyst

A technology of dimethyl oxalate and catalyst, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve problems such as high pressure, high temperature, and large dependence on metal chromium, so as to prolong service life and reduce side effects of reactions. The effect of less product and high selectivity

Active Publication Date: 2019-12-31
高化学(江苏)化工新材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Since the 1980s, countries all over the world have applied for a series of patents for oxalate-based ethylene glycol catalysts. The disadvantages are harsh reaction conditions (high temperature, high pressure), high energy and power consumption, and low conversion and selectivity of the reaction. Not very ideal, the space-time yield is not high; the dependence on metal chromium is large; the life of the catalyst is short, not suitable for industrial production

Method used

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  • Catalyst for preparing ethylene glycol through dimethyl oxalate hydrogenation and preparation method and application of catalyst
  • Catalyst for preparing ethylene glycol through dimethyl oxalate hydrogenation and preparation method and application of catalyst

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preparation example Construction

[0040] A method for preparing a catalyst, wherein the method for preparing comprises the steps of:

[0041] 1) According to the weight part of the catalyst composition, the soluble salt of the active component, the soluble salt of the auxiliary metal, and the precipitant are made into the first mixed solution;

[0042]2) adding a carrier to the first mixed solution according to the weight of the carrier contained in the catalyst, aging under stirring conditions, and then removing the ammonia water in the first mixed solution by heating to obtain a catalyst precursor;

[0043] 3) washing, filtering and drying the catalyst precursor;

[0044] 4) calcining the above-mentioned dried catalyst precursor, and finally forming into tablets or extruding strips to obtain the catalyst.

[0045] As yet another embodiment of the present case, wherein the soluble salt of the active metal is one of nitrate, acetate and sulfate.

[0046] As yet another embodiment of the present case, wherein...

Embodiment 1

[0055] A kind of catalyst of dimethyl oxalate hydrogenation ethylene glycol, catalyst is a hollow ring structure, by weight, catalyst comprises following components:

[0056] Active ingredient 20 parts;

[0057] 1 part of auxiliary metal;

[0058] Carrier 79 parts.

[0059] Wherein, the active component is silver and nickel; the carrier is carbon nanotube.

[0060] The promoter metals include 1 part cesium, 2 parts scandium, 0.5 part yttrium, and 1 part cerium.

[0061] The outer diameter of the catalyst is 10mm, the inner diameter is 5mm, and the height is 2mm;

[0062] A kind of preparation method of catalyst, preparation method comprises the steps:

[0063] (1) 7.8 g AgNO 3 , 15.5 g Ni(NO 3 ) 2 , 0.15g CsNO 3 , 1.13g Sc(NO 3 ) 3 ·6H 2 O, 0.1gY (NO 3 ) 3 ·6H 2 O, 0.3 parts Ce(NO 3 ) 3 ·6H 2 O was dissolved in 1000 milliliters of deionized water, and 35 milliliters of ammonia solution with a mass concentration of 28% was slowly added thereto to form the first...

Embodiment 2

[0070] A kind of catalyst of dimethyl oxalate hydrogenation ethylene glycol, catalyst is a hollow ring structure, by weight, catalyst comprises following components:

[0071] Active ingredient 30 parts;

[0072] 5 parts of auxiliary metal;

[0073] Carrier 65 copies.

[0074] Among them, the active components are silver and nickel; the carrier is HMS.

[0075] The promoter metals include 2 parts cesium, 3 parts scandium, 1 part yttrium, and 2 parts cerium.

[0076] The outer diameter of the catalyst is 8mm, the inner diameter is 4mm, and the height is 5mm.

[0077] A kind of preparation method of catalyst, preparation method comprises the steps:

[0078] (1) 15.6g AgNO 3 , 15.5g Ni(NO 3 ) 2 , 0.89g CsNO 3 , 4.77g Sc (NO 3 ) 3 ·6H 2 O, 1.33gY (NO 3 ) 3 ·6H 2 O, 1.92g Ce(NO 3 ) 3 ·6H 2 O was dissolved in 1000 milliliters of deionized water, and 40 milliliters of ammonia solution with a mass concentration of 28% was slowly added dropwise to form the first mixed s...

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Abstract

The invention discloses a catalyst for preparing ethylene glycol through dimethyl oxalate hydrogenation. The catalyst is of a hollow cyclic structure and comprises the following components in parts byweight: 1-50 parts of an active component, 0-10 parts of a metal aid and 30-90 parts of a carrier, wherein the active component is at least one of copper, silver, nickel, cobalt, gold and iron; the carrier is at least one of SiO2, carbon nanotubes, activated carbon, graphene, mesoporous carbon, ZrO2, Al2O3, ZnO, SBA-15, HMS, ZSM-5, MCM-41 and MCM-48. The catalyst for preparing ethylene glycol through dimethyl oxalate hydrogenation, which is disclosed by the invention, is high in activity, good in stability and high in selectivity, the conversion rate of dimethyl oxalate is greater than 99.9%,the selectivity of ethylene glycol is greater than 96%, the reaction has a small amount of byproducts, target products are easy to separate, and the catalyst is stable in reaction and free of conspicuous deactivation phenomena after long-term single tube operation of 1000 hours.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a catalyst for hydrogenating dimethyl oxalate to ethylene glycol and its preparation method and application. Background technique [0002] Ethylene glycol, commonly known as glycol, is an important organic chemical raw material. It can be mixed with water in any proportion. It has a high boiling point and a low freezing point. Ethylene glycol reacts with terephthalic acid to form polyethylene terephthalate , can be used as a raw material for polyester fiber and polyester plastic, widely used in lubricants, plasticizers, paints, adhesives, surfactants, explosives, etc., and can also be used to prepare antifreeze or directly as an organic solvent In addition, the dinitrate of ethylene glycol can also be used as explosives, and the steam generated after heating can be used as a stage smoke screen, and it is also indispensable for the production of plasticizers, paints, ...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J29/03B01J29/04B01J35/02C07C29/149C07C31/20B01J35/08
CPCB01J23/8946B01J29/044B01J29/0333C07C29/149B01J2229/18B01J35/51B01J35/40C07C31/202Y02P20/52
Inventor 张凌峰陈广忠
Owner 高化学(江苏)化工新材料有限责任公司
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