Catalyst for hydrogenation of dimethyl oxalate to ethylene glycol, preparation method and application thereof

A technology of dimethyl oxalate and catalyst, applied in molecular sieve catalysts, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of high pressure, high temperature, large dependence on metal chromium, etc. Long service life, high selectivity effect

Active Publication Date: 2022-06-24
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 hydrogenation of dimethyl oxalate to ethylene glycol, preparation method and application thereof
  • Catalyst for hydrogenation of dimethyl oxalate to ethylene glycol, preparation method and application thereof

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preparation example Construction

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

[0041] 1) according to the weight parts 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 by weight of the carrier contained in the catalyst, aging under agitation, 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 punching or extruding into strips to obtain the catalyst.

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

[0046] As another embodiment of the present case, the soluble salt of the auxiliary metal is one or a combi...

Embodiment 1

[0055] A catalyst for preparing ethylene glycol by hydrogenation of dimethyl oxalate, the catalyst is a hollow ring structure, and in parts by weight, the catalyst comprises the following components:

[0056] 20 active ingredients;

[0057] 1 part of auxiliary metal;

[0058] Vector 79 copies.

[0059] Among them, the active components are silver and nickel; the carrier is carbon nanotubes.

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

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

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

[0063] (1) 7.8 grams of 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 part Ce (NO 3 ) 3 ·6H 2 O was dissolved in 1000 milliliters of deionized water, and 35 milliliters of ammonia aqueous solution with a mass c...

Embodiment 2

[0070] A catalyst for preparing ethylene glycol by hydrogenation of dimethyl oxalate, the catalyst is a hollow ring structure, and in parts by weight, the catalyst comprises the following components:

[0071] 30 active ingredients;

[0072] 5 parts of auxiliary metal;

[0073] Vector 65 copies.

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

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

[0076] The catalyst has an outer diameter of 8 mm, an inner diameter of 4 mm and a height of 5 mm.

[0077] A preparation method of a catalyst, the 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 aqueous solution with a mass concentration of 28% was slowly added dro...

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Abstract

The invention discloses a catalyst for hydrogenating dimethyl oxalate to prepare ethylene glycol. The catalyst is a hollow ring structure. The catalyst comprises the following components in parts by weight: 1-50 parts of active components; 0-50 parts of promoter metals 10 parts; 30-90 parts of carrier. The active component is at least one of copper, silver, nickel, cobalt, gold and iron; the carrier is SiO 2 , carbon nanotubes, activated carbon, graphene, mesoporous carbon, ZrO 2 、Al 2 o 3 , ZnO, SBA-15, HMS, ZSM-5, MCM-41 and at least one of MCM-48. The catalyst for the hydrogenation of dimethyl oxalate to ethylene glycol of the present invention has high activity, good stability and high selectivity, the conversion rate of dimethyl oxalate can be greater than 99.9%, and the selectivity of ethylene glycol is greater than 96%. There are few by-products, and the target product is easy to separate. After 1000 hours of single-tube long-term operation of the catalyst, the reaction is stable and there is no obvious deactivation phenomenon.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a catalyst for preparing ethylene glycol by hydrogenation of dimethyl oxalate and a preparation method and application thereof. 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, with high boiling point and low freezing point. Ethylene glycol reacts with terephthalic acid to form polyethylene terephthalate. , can be used as raw material of polyester fiber and polyester plastic, widely used in lubricants, plasticizers, paints, adhesives, surfactants, explosives and other fields, and can also be used to prepare antifreeze or directly used as organic solvents , In addition, ethylene glycol dinitrate can also be used as an explosive, and the steam generated after heating can be used as a stage smoke screen. It is also indispensable for the production of plas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J29/03B01J29/04B01J35/02C07C29/149C07C31/20B01J35/08
CPCB01J23/8946B01J35/023B01J29/044B01J29/0333C07C29/149B01J35/08B01J2229/18C07C31/202Y02P20/52
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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