Method for synthesizing methyl propionate by ethylene

A technology for methyl propionate and ethylene, applied in the field of ethylene oxo synthesis of methyl propionate, can solve the problems of no commercial application prospect, harsh reaction conditions, poor selectivity, etc., and achieve good catalytic activity and selectivity, good selectivity , the effect of good commercial value

Active Publication Date: 2013-09-25
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The literature shows that complex catalysts such as ruthenium, nickel, cobalt, etc. are also active to CO / CH3OH / ethylene for carbonylation of methyl propionate [R.F.Heck, J.A.m. Chem. Soc.1963,85; W .Keim.J.Mol.Catal.,1989,54(1)], but these catalytic systems have the disadvantages of harsh reaction conditions, low conversion rate, poor selectivity, etc., basically no commercial application prospects

Method used

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  • Method for synthesizing methyl propionate by ethylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 400.0 g of methanol, 0.1605 g of palladium acetate, 0.0160 g of nickel acetate, 6.40 g of triphenylphosphine, 9.60 g of benzenesulfonic acid, and 40.0 g of distilled water, and put them into a 1000 mL autoclave for sealing. n (CO): n (C 2 H 4 )=1:1, stirring speed 400r / min, reaction temperature 80°C, reaction pressure 3.0MPa, reaction for 120 minutes, based on ethylene, the yield of methyl propionate is 96%. The kettle liquid is a golden yellow transparent liquid.

Embodiment 2

[0029] Weigh 400.0 g of methanol, 18.0 g of concentrated sulfuric acid, 8.00 g of tris (3,4-dimethoxyphenyl) phosphine, 0.1604 g of palladium acetate, 0.0160 g of ruthenium acetate, and 20.0 g of distilled water, and add them to a 100 mL autoclave for sealing. n (CO): n (C 2 H 4 )=2:1, stirring speed 400r / min, reaction temperature 110°C, reaction pressure 2.5MPa, reaction for 120 minutes, based on ethylene, the selectivity to methyl propionate is 95%. The kettle liquid is a golden yellow transparent liquid.

Embodiment 3

[0031] Weigh 400.0 g of methanol, 22.0 g of salicylic acid, 6.40 g of triphenylphosphine, 0.1604 g of palladium acetate, 0.0210 g of ruthenium acetate, and 40.0 g of distilled water, and put them into a 100 mL autoclave for sealing. n (CO): n (C 2 H 4 )=5:1, stirring speed 400r / min, reaction temperature 90℃, reaction pressure 1.5MPa, reaction for 120 minutes, based on ethylene, the selectivity to methyl propionate is 95%. The kettle liquid was earthy yellow and turbid, with black granular sediments, and there were many powdery sediments in the lower layer.

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Abstract

The invention discloses a method for synthesizing methyl propionate by ethylene. The methyl propionate is prepared from the materials: ethylene, methanol, carbon monoxide and water under existence of a catalyst in a carbonyl combination manner; and the adopted catalyst is a composite catalyst system taking palladium acetate as a main catalyst, and metal ions such as cobalt, nickel or ruthenium and the like as a promoter. The method disclosed by the invention has good catalytic activity and selectivity at a low temperature and low pressure; the composite catalyst system has the advantages of low consumption, good selectivity, long service life and the like; carbonyl synthesis of the methyl propionate from the ethylene can be efficiently catalyzed; the reaction result is based on the ethylene; the yield of the methyl propionate is greater than 95%; and the entire method has good commercial value.

Description

technical field [0001] The invention belongs to the field of ethylene oxo synthesis organic chemical products, in particular to a method for ethylene oxo synthesis of methyl propionate. Background technique [0002] Methyl propionate is a colorless and transparent organic liquid, which is widely used as a solvent for high-grade food and cosmetics, and can also be used as an excellent additive, preservative or fragrance in some foods and feeds. Methyl propionate can produce propionate, propionic acid, propionate (benzyl propionate, isopentyl propionate, etc.) and other products through saponification reaction, hydrolysis reaction and transesterification reaction, so methyl propionate The development of synthetic process is conducive to the progress and development of propionic acid, propionate, propionate and other process technologies. [0003] Oxo-synthesis of methyl propionate has long attracted the attention of academic circles. In the 1930s, Reppe in Germany proposed th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/24C07C67/38B01J31/28
Inventor 谭平华成雪清王大军朱林赖崇伟李军熊国炎应理
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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