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Butanol-butyl formate azeotropic mixture extractive distillation method

An azeotrope, butyl formate technology, applied in the preparation of carboxylate, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of difficult to guarantee product purity and high cost, achieve diverse selectivity, improve use efficiency, cost reduction effect

Inactive Publication Date: 2016-04-20
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, azeotropic distillation has its own limitations: in terms of energy consumption, the cost is higher than other methods, and in terms of equipment investment, it is often larger than other methods, and the product purity is difficult to guarantee
[0008] At present, there is no relevant literature or report on the separation of butanol-butyl formate azeotropic system

Method used

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  • Butanol-butyl formate azeotropic mixture extractive distillation method
  • Butanol-butyl formate azeotropic mixture extractive distillation method
  • Butanol-butyl formate azeotropic mixture extractive distillation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This implementation case is a continuous extraction and distillation operation mode, as attached image 3 As shown, the extraction agent is ethylene glycol and N-picoline dimethyl phosphate ([mpy][DMP]), the dosage is 80kg / h; the raw material processing capacity is 100kg / h, and the raw material composition is butanol (18wt% ) and butyl formate (82wt%). The number of T101 trays is 55, the feeding position of the extractant is on the 5th tray, and the feeding position of the raw material is on the 45th tray. The reflux ratio is set to 4:1, the extraction rate at the top of the tower is 82kg / h, and the purity of butyl formate obtained is 99.7%. The number of T102 trays is 50, the feeding position of stream ⑤ is the seventh tray, the reflux ratio is 0.5:1, the extraction rate at the top of the tower is 18kg / h, and the purity of butanol obtained is 99.6%. The extraction agent at the bottom of the column is refluxed as a supplement to the solvent.

Embodiment 2

[0049] The extraction agent is ethylene glycol, the dosage is 180kg / hr, the reflux ratio of T101 is set to 5:1, the reflux ratio of T102 is set to 1.5:1, other conditions are as in Example 1. The purity of the butanol and butyl formate products obtained is above 99.9%.

Embodiment 3

[0051] This implementation case is an operation mode of batch extraction and rectification, as attached Figure 4 As shown, ethylene glycol and N-picoline phosphate dimethyl salt ([mpy][DMP]) were selected as the extractant, and the dosage was 300kg; the raw material processing capacity was 100kg / h, and the raw material composition was butanol (18wt%) and Butyl formate (82wt%); the number of extraction and rectification trays is 55, and the feeding position of the extractant is on the fifth tray; the mixture of butanol and butyl formate is injected into the distillation column bottom E1 at one time by the raw material pump P2 , turn on the heating; when the condensate appears at the top of the tower, the total reflux operation, and the extractant is continuously added to the tower through the pump P1, and the total reflux operation is continued; when the temperature at the top of the tower reaches 60 ° C, it is detected that the content of butyl formate at the top of the tower ...

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Abstract

Provided is a butanol-butyl formate azeotropic mixture extractive distillation method. The butanol-butyl formate azeotropic mixture extractive distillation method comprises a pressure-reduction continuous operating mode or a pressure-reduction intermittent operating mode, by means of selecting multiple extraction agents, high-purity butanol and butyl formate products are obtained, and the extraction agents can be recycled. The butanol-butyl formate azeotropic mixture extractive distillation method has the advantages that in the extraction process, not only is traditional solvent adopted, but also a mixed extraction agent which is composed of the traditional solvent and ionic liquid is adopted, the huge advantages in the aspects of energy consumption, environment stress and product purity are achieved, the method is specially suitable for large scale industrial application and particularly aims at separation of a butanol-butyl formate azeotropic system, and the current technical gap is filled up.

Description

technical field [0001] The separation method provided by the present invention is aimed at the butanol-butyl formate azeotropic system, respectively adopts ethylene glycol, ethylene glycol and a mixed solvent composed of ionic liquid as the extraction agent, and belongs to the butanol-butyl formate azeotropic system extractive distillation method. Background technique [0002] The raw materials involved in the present invention are butanol and butyl formate, both of which are common substances in the chemical industry. Butanol (C 4 h 10 O), also known as tyrosol and propylene alcohol, is a solvent for various coatings and a raw material for making plasticizer dibutyl phthalate (see phthalates), and is also used to make butyl acrylate, Butyl acetate, ethylene glycol butyl ether, as organic synthesis intermediates and extraction agents for biochemical drugs, are also used in the manufacture of surfactants. Butyl formate (C 5 h 10 o 2 ), used as solvents for paints, solv...

Claims

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Application Information

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IPC IPC(8): C07C29/84C07C31/12C07C67/54C07C69/06
CPCC07C29/84C07C67/54C07C31/12C07C69/06Y02P20/54
Inventor 姜占坤刘顺江孙国新
Owner UNIV OF JINAN
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