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Wetting dry pot dynamic composite rectifying process of thermosensitive material

A rectification process and material technology, which is applied in the direction of distillation and fractionation in the boiler/distillate, to achieve the effects of short rectification time, high yield and low thermal decomposition rate of materials

Inactive Publication Date: 2006-02-15
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no report on the rectification of heat-sensitive materials using an inverted column in the published literature

Method used

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  • Wetting dry pot dynamic composite rectifying process of thermosensitive material

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Embodiment 1

[0017] Embodiment 1: The raw material is 60% (mass percentage) of heat-sensitive material 4-hydroxy-2-butanone, which contains 14% (mass percentage) of light impurities and 26% (mass percentage) of heavy impurities. Add heat carrier white oil into the wet dry kettle, turn on the circulating pump, heat exchanger, and condenser, and use 50L / h from the feed port in the tower to the diameter of φ300 packing layer with a height of 8 meters (the packing is divided into two sections, each Section 4 meters) rectifying tower feed, then rectifying tower starts to run, carries out total reflux operation 0.5 hour earlier, then by mining heavy impurity at the bottom of the tower, the discharge rate is 14L / h, and the reflux flow at the top of the tower is 10L / h h, the remaining liquid at the top of the tower accumulates in the reflux tank. After the feed in the tower is completed, reduce the discharge rate at the bottom of the tower to 8L / h, and increase the return flow at the top of the to...

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Abstract

A dynamic complex rectifying process for the thermosensitive material features that a wet-type dry still is used for direct contact heating, its rectifying apparatus is composed of rectifying tower, condenser, reflux tank, heat exchanger, circulating pump and phase separator. Said thermosensitive material is rectified forward and backward. Its advantages are short rectifying time and high output rate of product.

Description

technical field [0001] The invention relates to a wet-type dry kettle dynamic composite rectification process for heat-sensitive materials. It belongs to the unconventional dynamic rectification separation technology that obtains high-purity products from heat-sensitive materials through rectification. Background technique [0002] With the development of the fine chemical industry, there are more and more fine chemicals, many of which are heat-sensitive and will decompose when heated. It is difficult to achieve high purity and yield with conventional distillation techniques. Batch rectification is a commonly used separation technology in the separation of fine chemicals. Conventional batch rectification is to put materials into the tower kettle, and extract the product and transition section from the top of the tower. Conventional batch rectification technology, because the separated material is put into the tower kettle at one time, and the...

Claims

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Application Information

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IPC IPC(8): B01D3/02B01D3/14
Inventor 崔现宝翟亚锐杨志才
Owner TIANJIN UNIV
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