Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Azeotropic distillation method

An azeotropic distillation and azeotropic technology, applied in the field of azeotropic distillation, can solve problems such as difficult stable operation, irregular fluctuations in temperature distribution, and excessive flow changes

Inactive Publication Date: 2005-12-21
MITSUBISHI RAYON CO LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is easy to cause excessive changes in the flow rate during flow regulation
In addition, because the temperature distribution in the tower tends to fluctuate irregularly with the flow rate of the entrainer, it is extremely difficult to perform stable operation.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Azeotropic distillation method
  • Azeotropic distillation method
  • Azeotropic distillation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] use figure 2 The equipment shown in implements the inventive method, adopts the aqueous solution that contains acetic acid as the solution to be distilled by the method for continuous distillation, and butyl acetate is as entrainer. As the azeotropic distillation column in which the azeotropic distillation is performed, a plate column having a total number of plates of 60 was employed.

[0077]The continuous azeotropic distillation was initiated in the following manner. A liquid mixture consisting of 75.0% by weight of acetic acid, 24.9% by weight of water and 0.1% by weight of butyl acetate was fed to the azeotropic distillation column 51, and the reboiler 63 of the azeotropic distillation column was used for heating. Total reflux is thus performed. Thereafter, butyl acetate from the entrainer tank 53 was gradually fed as an entrainer to thereby form a three-component azeotropic distillation consisting of acetic acid / water / butyl acetate. After the azeotropic zone i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A kind of azeotropic distillation method, this method comprises adopting entraining agent to distill the solution that needs to be distilled in azeotropic distillation column, reclaiming the azeotropic component containing entraining agent as tower top distillate, and said The solution that azeotropic component content reduces is reclaimed as column bottom product; Described method is characterized in that this method also comprises the target value of preset entrainer hold-up volume so that make the azeotropic zone in the distillation tower be in the preset in the tower Within the range, the actual retention of the entrainer is obtained, and the operating conditions of the distillation column are controlled so that the actual retention is consistent with the target value.

Description

technical field [0001] The invention relates to an azeotropic distillation method. More specifically, the present invention relates to a method for azeotropic distillation by using the retained amount of the entrainer as an index to control the operating conditions of the distillation column. Examples of the application of the present invention include a distillation process in the production of aromatic carboxylic acids in a reaction medium containing aliphatic carboxylic acids, wherein vapors containing water and aliphatic carboxylic acids generated during the production process are taken out of the reactor part and passed through Azeotropic distillation separates the water contained in the steam condensate, and at the same time, the hold-up amount of the entrainer is used as an index to control the operating conditions of the distillation column, so as to achieve the purpose of recovering the aliphatic carboxylic acid from the condensate. Background technique [0002] In...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/36
CPCB01D3/36
Inventor 沼田元千矶贝隆行
Owner MITSUBISHI RAYON CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com