Method of using gold-supported molecular sieve catalyst to convert methanol to methyl acetate

A technology of methyl acetate and catalyst, applied in the field of application of supported nano-gold catalyst in methanol carbonylation reaction

Inactive Publication Date: 2018-09-28
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal catalysts such as iridium, rhodium, palladium, nickel, and copper are generally used as active centers in previous patents and literatures of methanol carbonylation reactions, but there are few reports on supported gold zeolite molecular sieve catalysts.

Method used

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  • Method of using gold-supported molecular sieve catalyst to convert methanol to methyl acetate
  • Method of using gold-supported molecular sieve catalyst to convert methanol to methyl acetate
  • Method of using gold-supported molecular sieve catalyst to convert methanol to methyl acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] The preparation method of 0.1%Au / TS-1:

[0089] (1). ZSM-5 molecular sieves were synthesized by referring to published patent CN100364890C and TS-1 molecular sieves by referring to the method disclosed in published patent CN100457622A (2001) to synthesize ZSM-5 molecular sieves and TS-1 molecular sieve raw powders. Then roasting at 540 ° C for 4 hours to obtain TS-1 molecular sieve and ZSM-5 molecular sieve. (2). Ammonium exchange treatment: exchange the roasted molecular sieve with ammonium salt solution at a certain temperature. Then, washing, drying and roasting are carried out to obtain a hydrogen type molecular sieve catalyst. The ammonium salt is ammonium nitrate, the concentration is 0.6mol / L, the liquid-solid volume ratio of the catalyst and the ammonium salt solution is 5:1, the exchange temperature is 30°C, the exchange time is 1 hour, and the exchange times are 2 times. 110 DEG C of drying temperature, 12 hours of drying time, 540 DEG C of roasting temperat...

Embodiment 2

[0091] Repeat Example 1, but change the amount of chloroauric acid solution into 3.14ml and add water to 10ml, and the roasting temperature is 300°C. A supported gold catalyst 0.3%Au / TS-1 was obtained. Labeled: A-2.

Embodiment 3

[0093] Repeat embodiment 1, but change the degree of vacuum into-0.05MPa, and the consumption of chloroauric acid solution is changed into 10.46ml. The supported gold catalyst 1.0%Au / TS-1 was obtained. Labeled: A-3.

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Abstract

The invention relates to a method for preparing methyl acetate through a carbonylation reaction of methanol by using a gold-supported zeolite molecular sieve catalyst. Gold can strongly interact withSi-OHin the high-silicon zeolite when the nano gold is loaded on the high-silicon zeolite. A bifunctional catalyst having a metal activity and acidity can be produced. The molecular sieve refers to atitanium-silicon zeolite molecular sieve and a high-silicon zeolite molecular sieve. Preparation of a supported gold catalyst by deposition and precipitation under negative pressure is beneficial to purifying the inner and outer surfaces and pore channels of the molecular sieve, so that the gold easily enter the pore channels of the molecular sieve, and the highly-dispersed gold-supported zeolitemolecular sieve catalyst is obtained. When the supported gold catalyst prepared by the method is used for the carbonylation reaction of the methanol, the strong acid center and the metal active centerwhich are required by the carbonylation of the methanol enable the methanol to react to generate methyl acetate and methyl formate under the double-function action of the metal and the acid.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to the application of a supported nano-gold catalyst in methanol carbonylation reaction. Background technique [0002] Methanol is one of the important raw materials of the petrochemical industry. Its main sources are coal gasification, coal liquefaction by-product methanol and petrochemical re-production of methanol. The isomerization of methyl acetate has a wide range of uses. For example, the textile industry, perfume and pharmaceutical industries, etc., and it is an intermediate of organic raw materials. The downstream products mainly include acetic acid, acetic anhydride, methyl acrylate and vinyl acetate, acetamide, etc. Methyl acetate is often used as an extraction solvent in recent years, which can effectively remove the bitter taste of coffee and tea, and is more and more widely used in the food processing industry. With the proposal and development of green chemistry, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/03B01J29/44B01J29/48B01J29/74B01J29/89B01J35/00B01J37/02B01J37/03B01J37/08B01J37/30C07C67/36C07C69/14
CPCC07C67/36B01J29/0325B01J29/44B01J29/48B01J29/74B01J29/7415B01J29/7469B01J29/7476B01J29/7484B01J29/89B01J37/0207B01J37/035B01J37/08B01J37/30B01J2229/37B01J2229/186B01J35/393B01J35/394B01J35/396C07C69/14
Inventor 艾沙·努拉洪马亚亚毕坤豪
Owner XINJIANG UNIVERSITY
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