Catalyst for preparing methyl acetate through carbonylation of dimethyl ether as well as preparation method and application of catalyst

A technology of methyl acetate and solid acid catalyst, applied in the field of catalytic chemistry, can solve the problems of equipment maintenance cost, environmental pollution, high cost and the like, and achieve the effects of good industrial application prospect, low cost and simple preparation method

Active Publication Date: 2021-12-07
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Current noble metal catalysts show high activity and selectivity, but they are expensive and require the use of halides that are corrosive to equipment, resulting in expensive equipment maintenance costs and environmental pollution

Method used

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  • Catalyst for preparing methyl acetate through carbonylation of dimethyl ether as well as preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 1.0g solid acid Nb 2 o 5 ·nH 2 O powder was added to 100 mL of deionized water and stirred vigorously. Then accurately weigh 1.0mL to a concentration of 0.02mol L -1 RuCl 3 The solution was dissolved in deionized water to prepare 10 mL of noble metal solution, and slowly injected into the vigorously stirred solid acid suspension through a syringe pump at an injection speed of 5.0 mL / h. After the injection was completed, the resulting mixed solution was stirred at room temperature for 24 h. Transfer the fully mixed mixed solution to a rotary evaporator, and realize solid-liquid separation at a water bath temperature of 80°C to obtain Nb loaded with Ru metal elements. 2 o 5 ·nH 2 O solid. Then after the obtained solid is ground evenly, pass into H 2 Concentration of 5% H 2 -Ar mixed gas for reduction, temperature 320°C, time 4h. The reduced solid is compressed into tablets to obtain the catalyst.

[0027] The reaction conditions for the catalyst to be us...

Embodiment 2

[0029] Weigh 1.0g solid acid Nb 2 o 5 ·nH 2 O powder was added to 100 mL of deionized water and stirred vigorously. Then accurately weigh 1.0mL to a concentration of 0.02mol L -1 RhCl 3 The solution was dissolved in deionized water to prepare 10 mL of noble metal solution, and slowly injected into the vigorously stirred solid acid suspension through a syringe pump at an injection speed of 5.0 mL / h. After the injection was completed, the resulting mixed solution was stirred at room temperature for 24 h. Transfer the fully mixed mixed solution to a rotary evaporator, and realize solid-liquid separation at a water bath temperature of 80°C to obtain Nb loaded with Rh metal elements. 2 o 5 ·nH 2 O solid. Then after the obtained solid is ground evenly, pass into H 2 Concentration of 5% H 2 -Ar mixed gas for reduction, temperature 320°C, time 4h. The reduced solid is compressed into tablets to obtain the catalyst.

[0030] The reaction conditions for the catalyst to be us...

Embodiment 3

[0032] Weigh 1.0g solid acid WO 3 / ZrO 2 powder, added to 100 mL of deionized water and stirred vigorously. Then accurately weigh 1.0mL to a concentration of 0.02mol L -1 RhCl 3 The solution was dissolved in deionized water to prepare 10 mL of noble metal solution, and slowly injected into the vigorously stirred solid acid suspension through a syringe pump at an injection speed of 5.0 mL / h. After the injection was completed, the resulting mixed solution was stirred at room temperature for 24 h. The fully mixed mixed solution was transferred to a rotary evaporator, and the solid-liquid separation was realized at a water bath temperature of 80°C to obtain WO loaded with Rh metal elements. 3 / ZrO 2 solid. Then after the obtained solid is ground evenly, pass into H 2 Concentration of 5% H 2 -Ar mixed gas for reduction, temperature 320°C, time 4h. The reduced solid is compressed into tablets to obtain the catalyst.

[0033] The reaction conditions for the catalyst to be u...

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Abstract

The invention discloses a catalyst for preparing methyl acetate through carbonylation of dimethyl ether and a preparation method and application of the catalyst. The catalyst is precious metal modified non-zeolite solid acid, the non-zeolite solid acid is selected from Nb2O5.nH2O, WO3/ZrO2, MoO3/ZrO2, B2O3/ZrO2, H3PW12O40, H4SiW12O40 and H3PMo12O40, and the precious metal is selected from Ru, Rh, Pd, Os, Ir, Pt and Ag. The preparation method comprises the steps of injecting a noble metal salt solution into a solid acid suspension; and fully stirring the mixed solution, transferring the stirred solution to a rotary evaporator, carrying out solid-liquid separation, and conducting reducing to obtain the catalyst. The catalyst is used for dimethyl ether carbonylation reaction, has the characteristic of high methyl acetate selectivity, is simple in preparation process and relatively low in cost, and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of catalytic chemistry, in particular to a catalyst for preparing methyl acetate by carbonylation of dimethyl ether, a preparation method and application thereof. Background technique [0002] Methyl acetate is an extremely widely used fatty acid ester, which can replace acetone, methyl ethyl ketone, ethyl acetate, cyclopentane, etc. It is widely used in many fields such as textiles, fragrances and medicine, and can also be used as an intermediate production Downstream products such as acetic acid, methyl acrylate, vinyl acetate and acetamide, etc. With my country's increasing emphasis on environmental protection, health and safety issues, the domestic demand for methyl acetate is growing rapidly. The traditional synthetic route of methyl acetate uses acetic acid and methanol as raw materials, and concentrated sulfuric acid as a catalyst, but this process has problems such as environmental pollution and eas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/18C07C69/14C07C67/00
CPCB01J27/19C07C67/00C07C69/14Y02P20/584
Inventor 康金灿叶少斌张庆红王野
Owner XIAMEN UNIV
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