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Rectification device

A technology of rectification and tower still, which is applied in the field of di-tert-butyl dicarbonate rectification device, can solve the problems of high technical energy consumption, cumbersome operation procedures, long working hours, etc., achieve good product purity, reduce production cost, and recover high rate effect

Active Publication Date: 2011-02-02
GENCHEM & GENPHARM CHANGZHOU CO LTD
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  • Abstract
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Problems solved by technology

[0002] In the prior art, the mother liquor produced by the process of crystallization and purification of di-tert-butyl dicarbonate still contains about 30% di-tert-butyl dicarbonate product, and the rest is solvent and low-boiling impurity di-tert-butyl carbonate. Existing The technology adopts long-term low-temperature crystallization at -20°C to recover products, and only about 5% of products with a content of 95% can be recovered. If the purity of recovered products does not meet the standard, further refined treatment is required, and the existing technology has high energy consumption, long working hours, and cumbersome operating procedures

Method used

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Embodiment Construction

[0012] Such as figure 1 As shown, the rectification device includes a tower kettle 1-4, a circulation pump 4, a falling film reboiler 5, a tower column 1, a condenser 2 and a receiving tank 3; the tower kettle 1-4 is provided with a feed port 1-5 and thermometer T1; one end of the falling film reboiler 5 is arranged on the top of the tower kettle, and the other end is connected with the bottom of the tower kettle through the circulating pump 4, and a heating mechanism is arranged in the falling film reboiler 5, and the The temperature mechanism includes a steam inlet 5-3a and a steam outlet 5-3b; the tower column 1 is set on the tower kettle 1-4, and the top of the tower column 1 is provided with a gas phase pipe interface 1-1, a thermometer T2 and a liquid distributor 1-2, The gas phase pipe interface 1-1 is connected to the condenser 2; the condenser 2 is provided with a gas phase inlet 2-1, a vent port 2-2, a cooling water inlet 2-4, a cooling water outlet 2-3 and a condens...

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Abstract

The invention belongs to chemical equipment, in particular to rectification equipment which is used for recovering butyl dicarbonate in crystallized mother liquor. The rectification device comprises a column kettle, a circulating pump, a falling film type reboiler, a pylon, a condenser and a receiving tank. The invention has the advantages of high recovery rate and high product purity of butyl dicarbonate, is especially suitable for recovering butyl dicarbonate in the crystallized mother liquor, improves work efficiency and lowers production cost.

Description

technical field [0001] The invention belongs to chemical equipment, and in particular relates to a distillation equipment, which is a rectification device for recovering di-tert-butyl dicarbonate in crystallization mother liquor. Background technique [0002] In the prior art, the mother liquor produced by the process of crystallization and purification of di-tert-butyl dicarbonate still contains about 30% di-tert-butyl dicarbonate product, and the rest is solvent and low-boiling impurity di-tert-butyl carbonate. Existing The technology adopts long-term low-temperature crystallization at -20°C to recover products, and only about 5% of products with a content of 95% can be recovered. The purity of recovered products does not meet the standard and needs further refined treatment. The existing technology has high energy consumption, long working hours, and cumbersome operating procedures. Contents of the invention [0003] The object of the present invention is to aim at the ...

Claims

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Application Information

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IPC IPC(8): B01D3/28C07C69/96C07C68/06
Inventor 王玉琴詹玉俊
Owner GENCHEM & GENPHARM CHANGZHOU CO LTD
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