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

A technology of methyl acetate and catalyst, applied in catalyst activation/preparation, carbon monoxide or formate reaction preparation, molecular sieve catalyst and other directions, can solve the problems such as can not meet the needs of industrial production, catalyst is easy to deactivate, etc., to achieve catalyst stability Good performance, reduce catalyst dosage, and reduce production and maintenance costs

Active Publication Date: 2019-03-08
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] In the research on the carbonylation of dimethyl ether to produce methyl acetate disclosed in the prior art, the catalyst is easily deactivated, which cannot meet the needs of industrial production

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation of embodiment 1 EMT molecular sieve

[0042]According to the method in the document Synthesis of silica-rich faujasite using crown-ethers astemplates: F.Delprato et, ZEOLITES, 1990, VO1 10:546, an EMT molecular sieve with a silicon-aluminum ratio of 4.2 was prepared.

[0043] EMT molecular sieves with silicon-aluminum atomic ratios (Si / Al) of 10, 15, 20, and 30 were obtained through dealumination of water vapor at 600° C. for 1 hour, 2 hours, 4 hours, and 8 hours.

Embodiment 2

[0044] The preparation of embodiment 2 catalyst CAT-1

[0045] Put 100 grams of EMT molecular sieves (Si / Al=15) into 1000 mL of 0.5 mol / L acetic acid solution at 80° C. for 2 hours, filter and wash until neutral. Then, it was baked at 120°C and 550°C for 4 hours in an air atmosphere. Get sample 80g of the good sample of acid treatment, 28g pseudo-boehmite (water content 29%) mixes evenly with 10% dilute nitric acid and then extrude into strips, dry at 120°C, and roast at 550°C for 4 hours to prepare the sample at 300°C , Pyridine and nitrogen with a volume ratio of 1:5 for 2 hours, recorded as catalyst CAT-1.

Embodiment 3

[0046] The preparation of embodiment 3 catalyst CAT-2~CAT-5

[0047] The specific preparation method and conditions are consistent with the catalyst CAT-1 in Example 2, except that the EMT molecular sieve with a silicon-aluminum ratio of Si / Al=4.2 is used, and the acid solution is a 0.5mol / L hydrochloric acid solution, and the obtained sample is recorded as a catalyst CAT-2.

[0048] The specific preparation method and conditions are consistent with the catalyst CAT-1 in Example 2, the difference is that the EMT molecular sieve with a silicon-aluminum ratio of Si / Al=10 is used, the acid solution is a 0.5mol / L nitric acid solution, and the obtained sample is recorded as a catalyst CAT-3.

[0049] The specific preparation method and conditions are consistent with the catalyst CAT-1 in Example 2, except that the EMT molecular sieve with a silicon-aluminum ratio of Si / Al=20 is used, and the acid solution adopts oxalic acid solution of 0.5mol / L, and the obtained sample is recorded...

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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 it contains a modified EMT molecular sieve, and the modified EMT molecular sieve is treated with an acid and then treated with pyridine and / or a pyridine substitute EMT molecular sieve; the pyridine substituent is one, two or three of the five H on the pyridine ring independently selected from F, Cl, Br, I, CH 3 、CF 3 、CH 3 CH 2 or NO 2 The substituents in replace the resulting compound. The catalyst has high stability and methyl acetate selectivity, and can still maintain high methyl acetate selectivity after long-time reaction.

Description

technical field [0001] The application relates to a catalyst for producing methyl acetate by carbonylation of dimethyl ether, its preparation method and application, and belongs to the field of chemical engineering. Background technique [0002] With the rapid development of modern industry, the contradiction between energy supply and demand has become increasingly prominent. my country, as a big energy consumer and a big energy shortage country, urgently needs to find alternative energy sources. As a clean energy source, ethanol has good miscibility and can be added to gasoline as a blending component to partially replace gasoline, increase the octane number and oxygen content of gasoline, effectively promote the complete combustion of gasoline, and reduce Emissions of CO and hydrocarbons in vehicle exhaust. As a partial substitute of vehicle fuel, ethanol can make my country's vehicle fuel present a diversified structural feature. At present, my country mainly develops ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/70B01J37/00C07C67/37C07C69/14
CPCB01J29/7019B01J37/0009B01J2229/16B01J2229/37C07C67/37C07C69/14
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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