Technical method for producing propyl aldehyde through hydroformylation of ethylene

A technology of ethylene hydroformylation and propionaldehyde, which is applied in the field of treatment of propionaldehyde rectification still liquid, which can solve the problems of increasing the difficulty of impurity polymer treatment, increasing the energy consumption load of rectification kettle, affecting the quality of rectification propionaldehyde, etc. problems, to achieve the effect of improving the process grade, reducing energy consumption, and simple process
CN102336638AInactive Publication Date: 2012-02-01南京荣欣化工有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
南京荣欣化工有限公司
Publication Date
2012-02-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a technical method for producing propyl aldehyde through hydroformylation of ethylene and particularly relates to a method for processing a propyl aldehyde rectifying still solution. The method comprises the following steps of: (1), reacting ethylene with CO and H2 under the action of a soluble rhodium-phosphine complex catalyst to generate propyl aldehyde, obtaining a propyl aldehyde product on the tower top of a rectifying tower, and treating the tower solution with a still solution recovery technology; (2), in the recovery treatment technology, separating the rectifying still solution through a membrane separator, returning clear solution at a permeation side to a reactor and discharging materials at a concentrating side to a waste solution tank. The technical method has the advantages of simple technology and simpleness for operation, and but more, realizes water recovery and reduces the discharge of waste solution.
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Description

technical field

[0001] The invention relates to a process for producing propionaldehyde by hydroformylation of ethylene, in particular to a method for treating propionaldehyde rectification still liquid. Background technique

[0002] Propionaldehyde is an important chemical product and chemical raw material. It is mainly used in the production of chemical intermediates such as propionic acid, propanol, trimethylolethane and acetone oxime. Wide range of uses. At present, the industrial production methods mainly include oxo synthesis method, propanol oxidation method, propylene oxide isomerization method, acrolein hydrogenation method and by-product method. Among them, the oxo synthesis method is the main method of production at present.

[0003] The oxo synthesis method, also known as ethylene hydroformylation method, uses ethylene, carbon monoxide, and hydrogen as raw materials, and uses cobalt and rhodium phosphine complexes as catalysts. The main features of this method ...

Claims

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