Fractionating tower for separating acrylic aldehyde from 3-hydroxypropionaldehyde solution

A technology of hydroxypropionaldehyde and rectification tower, applied in the field of rectification tower, can solve the problems of high investment in thin-film evaporator equipment, condenser operation cost, difficulty in maintaining the operating temperature of the tower kettle, difficulty in polymerization and recovery of acrolein, etc. Effects of flux, increased thickness, increased throughput
CN101033180AActive Publication Date: 2007-09-12SHANGHAI HUAYI NEW MATERIAL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI HUAYI NEW MATERIAL
Publication Date
2007-09-12

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Abstract

This invention provides a rectifying tower for separating and hydrate acrolein to prepare non-reacted acrolein in a 3-lactic aldehyde reacted product, the top of the tower applies a new vertical seeve plate and the lower part applies a parallel flow jet filling tower plate and the rectifying section applies structured packing, which can increase the separation ability of towers to reduce pressure drop of the tower and operation temperature, reduce aggregation trend and reduction and aggregation trend of 3-hydroxide propaldehyde so as to reduce the loss of acrolein in the top tower.
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Description

technical field

[0001] The invention relates to a rectification tower for separating acrolein in 3-hydroxy propionaldehyde solution. Specifically, the present invention relates to a rectification column in which structured packing is used in the stripping section of a rectification tower, the upper part of the rectification section is a new type of vertical sieve plate, and the lower part of the rectification section is a co-current injection packing tray. Background technique

[0002] Acrolein is an unsaturated compound with a double bond. Its chemical properties are very active. Its vinyl group is very easy to self-polymerize or copolymerize with other monomers. Because the polymerization reaction is fast and releases a lot of heat, once it happens, it will be very fast. It is difficult to control, so preventing the polymerization of acrolein is the first consideration when designing the acrolein separation system. Temperature is one of the factors that initiate the polym...

Claims

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