Catalyst carrier and catalyst for synthesizing dimethyl oxalate

A technology of dimethyl oxalate and catalyst carrier, which is applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., and can solve the problem of poor catalyst activity and the combination of carriers and additives Poor strength and other problems, to achieve long service life, improve activity and stability, and enhance the effect of bonding strength

Inactive Publication Date: 2020-05-22
HENAN UNIV OF URBAN CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of catalyst support that is used for the synthesis of dimethyl oxalate, to solve the problem of poor binding strength between existing support and auxiliary agent
[0006] Second object of the present invention is to provide a kind of catalyst that is used for the synthesis of dimethyl oxalate, to solve the problem of poor activity of existing catalyst

Method used

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  • Catalyst carrier and catalyst for synthesizing dimethyl oxalate
  • Catalyst carrier and catalyst for synthesizing dimethyl oxalate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The embodiment 1 of the catalyst that is used for the synthesis of dimethyl oxalate of the present invention adopts the following steps to prepare:

[0037] 1) 153g Al(OH) 3 Disperse in 300g deionized water to form a suspension, which is recorded as liquid A;

[0038] Weigh 52g of NaOH and dissolve it in 100g of deionized water, and record it as liquid B;

[0039] Weigh 47.6g of concentrated hydrochloric acid and drop it into 100g of deionized water, and record it as liquid C;

[0040] Weigh 0.76g Cu(NO 3 ) 2 ·3H 2 O, denoted as D;

[0041] 8g NaOH and 15.6g Al(OH) 3 Dissolve in 100g deionized water to form NaAlO 2 Solution, denoted as E solution;

[0042] Weigh 0.28g PdCl 2 Dissolve in 43g of water, drop into liquid C, make the pH of the solution between 4-6, and record it as liquid F;

[0043] Gradually drop liquid B into liquid A, stir for 2 hours, then drop a certain amount of liquid C to adjust the pH of the system to 7.5-8.5, continue stirring for 2 hours,...

Embodiment 2

[0049] The embodiment 2 of the catalyst that is used for the synthesis of dimethyl oxalate of the present invention adopts the following steps to prepare:

[0050] 1) 153g Al(OH) 3 Disperse in 300g deionized water to form a suspension, which is recorded as liquid A;

[0051] Weigh 52g of NaOH and dissolve it in 100g of deionized water, and record it as liquid B;

[0052] Weigh 47.6g of concentrated hydrochloric acid and drop it into 100g of deionized water, and record it as liquid C;

[0053] Weigh 0.91g Ni(NO 3 ) 2 ·6H 2 O, denoted as D;

[0054] 8g NaOH and 15.6g Al(OH) 3 Dissolve in 100g deionized water to form NaAlO 2 Solution, denoted as E solution;

[0055] Weigh 0.28g PdCl 2 Dissolve in 43g of water, drop into liquid C, make the pH of the solution between 4-6, and record it as liquid F;

[0056] Gradually drop liquid B into liquid A, stir for 1 h, then drop a certain amount of liquid C to adjust the pH of the system to 8.0-9.0, continue stirring for 1 h, and t...

Embodiment 3

[0062] The embodiment 3 of the catalyst that is used for the synthesis of dimethyl oxalate of the present invention adopts the following steps to prepare:

[0063] 1) 153g Al(OH) 3 Disperse in 300g deionized water to form a suspension, which is recorded as liquid A;

[0064] Weigh 52g of NaOH and dissolve it in 100g of deionized water, and record it as liquid B;

[0065] Weigh 47.6g of concentrated hydrochloric acid and drop it into 100g of deionized water, and record it as liquid C;

[0066] Weigh 0.93g Zn(NO 3 ) 2 ·6H 2 O, denoted as D;

[0067] 8g NaOH and 15.6g Al(OH) 3 Dissolve in 100g deionized water to form NaAlO 2 Solution, denoted as E solution;

[0068] Weigh 0.28g PdCl 2 Dissolve in 43g of water, drop into liquid C, make the pH of the solution between 4-6, and record it as liquid F;

[0069] Gradually drop liquid B into liquid A, stir for 4 hours, then drop a certain amount of liquid C to adjust the pH of the system to 7.5-9.0, continue stirring for 4 hour...

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Abstract

The invention relates to a catalyst carrier and a catalyst for synthesizing dimethyl oxalate. The preparation method of the catalyst carrier comprises the following steps: 1) reacting NaOH with excessive Al(OH)3 in water, adding an acid to adjust the pH value to 7-9, and filtering to obtain a wet filter cake; 2) adding an auxiliary agent metal salt into the wet filter cake, uniformly mixing, drying, roasting, and crushing to obtain powder; 3) carrying out ball rolling treatment on part of the powder obtained in the step (2), spraying a NaAlO2 solution during the ball rolling treatment, and drying to obtain small seed balls; and 4) carrying out ball rolling treatment on the seed balls, spraying a NaAlO2 solution during the ball rolling treatment, adding the powder obtained in the step 2), drying, and roasting to obtain the catalyst carrier. According to the preparation method, the alpha-Al2O3 carrier is prepared while the auxiliary agent precursor is doped into the alpha-Al2O3 carrier,so that the dispersity of the auxiliary agent is improved, the bonding strength of the auxiliary agent and the carrier is improved, and the preparation of the catalyst with good catalytic activity andlong service life is facilitated.

Description

technical field [0001] The invention belongs to the field of catalysts for synthesizing dimethyl oxalate, in particular to a catalyst carrier and catalyst for synthesizing dimethyl oxalate. Background technique [0002] Ethylene glycol is an important chemical raw material, and the preparation of ethylene glycol is an important development direction of coal chemical industry. Ethylene glycol is mainly used to prepare polyester polyester, polyester resin, hygroscopic agent, plasticizer, surfactant, synthetic fiber, cosmetics and explosives, and is used as a solvent for dyes, inks, etc., to prepare engine antifreeze, gas Dehydrating agent, manufacturing resin, can also be used in cellophane, fiber, leather, adhesive wetting agent, etc. The preparation methods of ethylene glycol include chlorohydrin method, ethylene oxide hydration method, ethylene direct hydration method and formaldehyde method, etc. At present, the most commonly used method is the coupling of CO and methyl n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J23/60C07C69/36C07C67/36
CPCB01J23/8926B01J23/892B01J23/60C07C67/36C07C69/36
Inventor 徐辉陈湘陈建军杨立莉王再见丁国勇李翔张罡王要领
Owner HENAN UNIV OF URBAN CONSTR
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