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Method used for direct production of methyl methoxyacetate via gas-phase carbonylation of methyl aldehyde with methyl alcohol

A technology of methyl methoxyacetate and methanol, which is applied in chemical instruments and methods, carbon monoxide or formate reaction preparation, organic compound preparation, etc. Corrosion reaction equipment and other problems, to achieve easy separation, shorten the process, and avoid the effect of corrosion

Inactive Publication Date: 2014-07-02
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] According to the patent [CN201210205619.7; EP19820305617], it is reported that strong acidity is currently used to catalyze the carbonylation of dimethoxymethane under liquid phase conditions to produce methyl methoxyacetate. This type of method is difficult to separate the product from the catalyst, and the liquid acid Corrosion reaction devices and other issues, while Bell et al. [Angew.Chem.Int.Ed.2009, 48, 4813-4815; J.Catal.2010, 274, 150-162] proposed the production of ethylene glycol precursor - methoxy The raw material used for methyl acetate is dimethoxymethane, and the reaction path is too long

Method used

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  • Method used for direct production of methyl methoxyacetate via gas-phase carbonylation of methyl aldehyde with methyl alcohol
  • Method used for direct production of methyl methoxyacetate via gas-phase carbonylation of methyl aldehyde with methyl alcohol
  • Method used for direct production of methyl methoxyacetate via gas-phase carbonylation of methyl aldehyde with methyl alcohol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The 40-60 mesh catalyst obtained by pressing H-ZSM-5 (Si / Al=25) molecular sieve powder into tablets, crushing and sieving. Put 0.6g of catalyst into a reactor with an inner diameter of 8mm, raise the temperature to 500°C in a nitrogen atmosphere, and keep the temperature constant for 1h, then naturally cool down to 140°C. Feed CO into the reaction tube to raise the pressure to 3.0MPa. Methanol and paraformaldehyde (decomposed to formaldehyde under acid catalysis) are carried by CO gas flow, and the saturated vapor pressures of methanol and paraformaldehyde (decomposed to formaldehyde under acid catalysis) are controlled by temperature. The partial pressure ratio of carbon monoxide and methanol is 30, the partial pressure ratio of carbon monoxide and paraformaldehyde is 180, and the total space velocity of carbon monoxide is 10600h -1 . The reactants were analyzed by online chromatography, the conversion rate of formaldehyde was 73.6%, and the selectivity of methyl met...

Embodiment 2

[0025] Other conditions were the same as in Example 1, and different solid acid catalysts were evaluated respectively, and the reaction effluent was analyzed by online chromatography. The results are shown in Table 1.

[0026] Table 1

[0027]

Embodiment 3

[0029] Other conditions were the same as in Example 1. The reaction performance of formaldehyde and methanol gas-phase carbonylation to produce methyl methoxyacetate was evaluated at different temperatures of 140°C, 150°C, and 170°C, and the reaction effluent was analyzed by online chromatography. The results are shown in Table 2.

[0030] Table 2

[0031] temperature(℃)

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Abstract

The invention provides a method used for preparing methyl methoxyacetate. According to the method, raw material gas containing methyl aldehyde, methyl alcohol, and carbon monoxide is delivered through a reactor filled with a solid acid catalyst, and reaction is carried out at a reaction temperature of 130 to 170 DEG C, under a reaction pressure of 1.0 to 5.0MPa, with gaseous hourly space velocity of 5300 to 16000 / h so as to obtain methyl methoxyacetate, wherein partial pressure ratio of carbon monoxide to methyl alcohol in the raw material gas ranges from 1 to 5. The method possesses following advantages: the catalyst can be easily separated from products, and no corrosion on equipment is caused.

Description

technical field [0001] The present invention relates to a kind of method of producing methyl methoxyacetate. Background technique [0002] Ethylene glycol is an important organic chemical raw material, an important monomer for the synthesis of polyester fibers, and an important antifreeze agent. Currently, the path to producing ethylene glycol is mainly dependent on petroleum. Naphtha undergoes catalytic cracking to obtain olefins, ethylene oxide produces ethylene oxide, and ethylene oxide is hydrolyzed to obtain ethylene glycol. Due to the shortage and non-renewability of petroleum resources, it is necessary to develop non-petroleum routes to produce ethylene glycol. [0003] DuPont [USP2152852; USP2285448] used sulfuric acid as a catalyst to catalyze the carbonylation reaction of formaldehyde under the conditions of 200°C and 90MPa, and applied this method to the commercial production of ethylene glycol. Chevron [USP 3911003] uses HF as a catalyst to conduct research on...

Claims

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Application Information

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IPC IPC(8): C07C69/708C07C67/36C07C67/37
CPCC07C41/56C07C67/36C07C69/708C07C43/30
Inventor 刘世平朱文良刘红超刘勇刘中民孟霜鹤倪友明李利娜周慧
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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