Methyl propionate preparation method

A technology of methyl propionate and methanol, which is applied in the field of preparation of methyl propionate, can solve the problems of tedious preparation of ionic liquid catalyst, high price, high energy consumption of homogeneous palladium catalyst, etc.

Active Publication Date: 2018-05-08
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are problems in the catalytic system used in the preparation of methyl propionate by the methoxycarbonylation reaction: for example: the homogeneous palladium catalyst has high energy consumption for separation, and the preparation of the ionic liquid catalyst is tedious and ex

Method used

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Embodiment 1

[0028] Weigh 2g 2wt%Ru / CeO 2 Catalyst, 14-25 mesh catalyst is sieved after forming and filled into the reaction tube, the bed height is 9mm, the reaction pressure is 2.0MPa, the reaction temperature is 200°C, and the ethylene volume space velocity is 450h -1 , CO volume space velocity 2000h -1 , methanol volumetric space velocity 5h -1 , every 3h sampling chromatographic analysis, the yield of methyl propionate was 70%.

Embodiment 2

[0030] Weigh 3.3g 2wt%Ru / TiO 2 , forming a 14-25 mesh catalyst and filling it into a reaction tube, filling a 15mm bed, and reacting at 200°C under a pressure of 2.0MPa, and the ethylene volume space velocity is 100h -1 , CO volume space velocity 2000h -1 , methanol volume space velocity 10h -1 , every 3h sampling chromatographic analysis, the yield of methyl propionate was 30%.

Embodiment 3

[0032] Weigh 3.3g 2wt%Ru / CeO 2 , take 14-25 mesh catalyst and fill it into the reaction tube, fill it with 15mm bed, and react at 200℃ under the pressure of 2.0MPa, and the volume space velocity of ethylene is 450h -1 , CO volume space velocity 2000h -1 , methanol volume space velocity 20h -1 , every 3h sampling chromatographic analysis, the yield of methyl propionate was 65%.

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Abstract

The invention relates to a methyl propionate preparation method, which comprises carrying out a reaction on raw materials including ethylene, carbon monoxide and methanol in a fixed bed reactor at a reaction temperature of 150-250 DEG C, wherein a reaction pipe is filled with a ruthenium-loaded metal oxide catalyst, and the reaction pipe with the catalyst is placed in the fixed bed reactor. According to the present invention, the reaction has the 100% atomic economy, does not produce by-products, and uses the noble metal-loaded metal oxide or the molecular sieve as the catalyst, wherein the catalyst is easily prepared and efficiently catalyzes the reaction, and the yield of methyl propionate can reach over 80% .

Description

technical field [0001] The invention relates to a method for preparing methyl propionate, in particular to the preparation of methyl propionate through the methoxy carbonylation reaction of methanol, carbon monoxide and ethylene. Background technique [0002] Methyl propionate has important uses in medicine, chemical industry, fuel, etc. It is mainly used as alkyl esters and derivatives of alkyl esters, and is also an important pharmaceutical intermediate and organic synthesis intermediate. Methyl propionate can be used to synthesize methyl methacrylate (MMA), and MMA is a monomer for synthesizing polymethyl methacrylate (p-MMA), which is widely used in glass, medical equipment and other fields. [0003] Methods for the preparation of methyl propionate have been reported. Ferreira, A.C et al. (Angew.Chem.Int Ed.2007, 46, 2273), Preparation of methyl propionate by catalyzed methoxycarbonylation of ethylene with boric acid ester as acid promoter in the presence of palladium a...

Claims

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Application Information

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IPC IPC(8): C07C67/38C07C69/24B01J23/63B01J23/648B01J23/46
Inventor 王峰安静华王业红张志鑫张健侯婷婷张晓辰
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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