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Method for synthesizing butanedialdehyde through acrolein hydroformylation

A technology of acrolein hydroformyl and succinaldehyde, which is applied to the preparation of carbon-based compounds, organic compounds, carbon monoxide reaction, etc., can solve the problems of high cost and difficult production of succinaldehyde, and achieve the goal of being suitable for The effect of mass production

Pending Publication Date: 2021-10-08
CHINA CHENGDA ENG
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Problems solved by technology

[0003] The object of the present invention is: the present invention provides a kind of acrolein hydroformylation synthetic succinic dialdehyde technique, solves the problem that the cost of existing succinic aldehyde production technique is high, production difficulty

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Acrolein and synthesis gas (H 2 +CO) molar ratio is 1:2.3, H in syngas 2 / CO mol ratio is 1.15; With succinaldehyde as solvent, the concentration of rhodium carbonyl in the reaction solution is 0.5%wt, the concentration of triphenylphosphine in the reaction solution is 15%wt, the ratio of triphenylphosphine and rhodium carbonyl The mass ratio is 30:1; the reaction pressure is 2.7MPaG, the reaction temperature is 120°C; the reaction residence time is 10 hours. The conversion rate of acrolein is 96%, and the selectivity of succinaldehyde is 91%.

Embodiment 2

[0020] Acrolein and synthesis gas (H 2 +CO) molar ratio is 1:3, H in syngas 2 / CO mol ratio is 1.4; With succinaldehyde as solvent, the concentration of rhodium carbonyl in the reaction solution is 1%wt, the concentration of triphenylphosphine in the reaction solution is 15%wt, the ratio of triphenylphosphine and rhodium carbonyl The mass ratio is 15:1, the reaction pressure is 0.5MPaG, the reaction temperature is 200°C, and the reaction residence time is 20 hours. The conversion rate of acrolein is 98%, and the selectivity of succinaldehyde is 90%.

Embodiment 3

[0022] Acrolein and synthesis gas (H 2 +CO) molar ratio is 1:2, H in syngas 2 / CO mol ratio is 0.9; With succinaldehyde as solvent, the concentration of rhodium carbonyl in the reaction solution is 0.001%wt, the concentration of triphenylphosphine in the reaction solution is 1%wt, the ratio of triphenylphosphine and rhodium carbonyl The mass ratio is 1000:1; the reaction pressure is 5MPaG, the reaction temperature is 80°C; the reaction residence time is 5 hours. The conversion rate of acrolein is 95%, and the selectivity of succinaldehyde is 95%.

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Abstract

The invention discloses a method for synthesizing butanedialdehyde through acrolein hydroformylation. Acrolein and synthetic gas are taken as raw materials, the synthetic gas comprises hydrogen and carbon monoxide, butanedialdehyde is taken as a solvent, the acrolein and the synthetic gas are added into a butanedialdehyde solution in which a catalyst is dissolved, and under certain temperature and pressure conditions, the acraldehyde is directly subjected to hydroformylation reaction to synthesize the 1, 4-butanedialdehyde. The method has the beneficial effects that acrolein, hydrogen and carbon monoxide are adopted as production raw materials, and the raw materials are easy to obtain and relatively low in cost; and the reaction is carried out under certain pressure and temperature through the catalyst, direct hydroformylation synthesis of butanedialdehyde from acrolein is realized, the process is simple and easy to operate, and the method is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of organic chemical synthesis, and specifically relates to a process for synthesizing succinic dialdehyde by hydroformylation of acrolein. Background technique [0002] Succindialdehyde is an important fine chemical (pharmaceutical) intermediate. The main production method is to use furan as raw material to obtain 2,5-dimethoxydihydrofuran through bromination and methoxylation, and then through catalytic addition Hydrogen synthesis to obtain 2,5-dimethoxytetrahydrofuran, further hydrolyzed by heating, the reaction solvent was evaporated under reduced pressure, and succinaldehyde was obtained after concentration. This method has disadvantages such as high cost of raw materials and difficulty in large-scale production. Contents of the invention [0003] The object of the present invention is: the present invention provides a kind of acrolein hydroformylation synthetic succinaldehyde technology, has solved the problem...

Claims

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Application Information

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IPC IPC(8): C07C45/50C07C47/12
CPCC07C45/505C07C47/12
Inventor 梁建平谭海军王亚林赵雯婷代渝王玉玫
Owner CHINA CHENGDA ENG
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