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A kind of catalyst for producing methyl acetate, its preparation method and application

A methyl acetate and catalyst technology, applied in the directions of carbon monoxide or formate reaction preparation, molecular sieve catalyst, chemical instruments and methods, can solve problems such as easy deactivation, reduce maintenance costs, reduce catalyst dosage, and achieve long catalyst life. Effect

Active Publication Date: 2019-04-02
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned patents disclose a large number of research results on the carbonylation of dimethyl ether, and the catalyst has been running stably for less than 100 hours, and is easily deactivated

Method used

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  • A kind of catalyst for producing methyl acetate, its preparation method and application
  • A kind of catalyst for producing methyl acetate, its preparation method and application
  • A kind of catalyst for producing methyl acetate, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1 Preparation of Hydrogen EMT Zeolite Molecular Sieve

[0045] According to the method in the literature Synthesis of silica-rich faujasite using crown-ethers as templates: F. Delprato et, ZEOLITES, 1990, VOl 10:546, an EMT molecular sieve with a silicon-to-aluminum ratio of 4.2 was prepared.

[0046] Exchange the EMT molecular sieve with 0.5mol / L ammonium nitrate three times (2 hours / time), wash with deionized water, dry, and calcinate at 550°C for 4 hours to obtain the hydrogen type EMT zeolite molecular sieve, which is recorded as sample 1. # .

Embodiment 2 4

[0047] Example 2 Preparation of silicon tetrachloride vapor dealumination hydrogen type EMT zeolite molecular sieve

[0048] Weigh 1g of hydrogen type EMT zeolite molecular sieve, fix both ends in a quartz tube with quartz wool, and introduce 273K saturated silicon tetrachloride vapor carried by nitrogen. After the obtained solid sample is washed with deionized water, separated by filtration, dried and roasted, a catalyst for the carbonylation of dimethyl ether to produce methyl acetate is obtained. Table 1 shows the relationship between the temperature and time of silicon tetrachloride steam treatment, the temperature and time of solid sample drying and roasting, and the sample number.

[0049] Table 1

[0050]

Embodiment 3 4

[0051] Example 3 Preparation of silicon tetrachloride vapor dealumination hydrogen type EMT zeolite molecular sieve (using pore expander)

[0052] 1.00g sample 6 # Add pore expander, then filter, wash, dry and roast to make 2 catalyst samples. Table 2 shows the relationship between the pore expander used, the processing temperature and time, the specific surface area and volume of the mesoporous sample and the sample number.

[0053] Table 2

[0054]

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Abstract

The present application discloses a catalyst for the carbonylation of dimethyl ether to produce methyl acetate, which is characterized in that the catalyst contains hydrogen-type EMT zeolite molecular sieves that have undergone vapor dealumination of silicon tetrachloride. The selectivity of methyl acetate and the stability of the catalyst can be greatly improved by using the hydrogen-type EMT zeolite molecular sieve that has been dealuminated by silicon tetrachloride steam as an active component.

Description

Technical field [0001] The application relates to a catalyst for the carbonylation of dimethyl ether to produce methyl acetate, its preparation method and application, and belongs to the field of chemistry and chemical engineering. Background technique [0002] With the rapid development of modern industry, the contradiction between energy supply and demand has become increasingly prominent. As a major energy consuming country and a major energy shortage country, China urgently needs to find alternative energy sources. As a kind of clean energy, ethanol has good mutual solubility. It can be blended into gasoline as a blending component to partially replace gasoline, increase the octane number and oxygen content of gasoline, and effectively promote the full combustion of gasoline and reduce Carbon monoxide and hydrocarbon emissions in automobile exhaust. Ethanol, as a partial substitute for vehicle fuel, can make my country's vehicle fuel present diversified structural character...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/70C07C69/14C07C67/37
CPCB01J29/7019B01J2229/16C07C67/37C07C69/14
Inventor 刘红超朱文良刘勇倪友明刘中民王林英田鹏
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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