Azeotropic distillation and normal distillation combined process for recycling butanol and butyl acetate

A technology of butyl acetate and azeotropic distillation, which is applied in the preparation of carboxylic acid esters, organic compounds, oxygenated compounds, etc., can solve the problems of energy waste and high energy consumption, and achieve the effect of avoiding energy waste

Active Publication Date: 2014-11-05
HEBEI UNIV OF TECH
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this process, the three towers all adopt azeotropic rectification, which has high energy consumption, and all three towers need to heat water for rectification, resulting in unnecessary waste of energy

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 and normal distillation combined process for recycling butanol and butyl acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The raw material solution containing butanol, butyl acetate and water at a temperature of 20°C is transported to the heat exchanger 11 through a pipeline at a flow rate of 1300kg / h, and is preheated after heat exchange with the bottom liquid of the third rectification column 10. After heating to 70°C, the raw material liquid is transported to the mixer 1, and after being mixed with the raw material liquid from the second phase separator 9, it is fed from the middle and upper part of the first rectification tower 2, and the tower of the first rectification tower 2 The number of plates is 38, the operating pressure is normal pressure, and the tower kettle is heated by a reboiler. The steam in the first rectification tower 2 is condensed by the first cooler 3 and then sent to the first phase separator 4 for phase separation. After that, the light phase is returned to the first rectification tower 2, and the heavy phase is sent to the second rectification tower 7. In the fi...

Embodiment 2

[0037]The raw material solution containing butanol, butyl acetate and water at a temperature of 30°C is transported to the heat exchanger 11 through a pipeline at a flow rate of 1000kg / h, and is preheated after heat exchange with the bottom liquid of the third rectification column 10. After heating to 72°C, the raw material liquid is transported to the mixer 1, and after being mixed with the raw material liquid from the second phase separator 9, it is fed from the middle and upper part of the first rectification tower 2, and the tower of the first rectification tower 2 The number of plates is 38, the operating pressure is normal pressure, and the tower kettle is heated by a reboiler. The steam in the first rectification tower 2 is condensed by the first cooler 3 and then sent to the first phase separator 4 for phase separation. After that, the light phase is returned to the first rectification tower 2, and the heavy phase is transported to the second rectification tower 7. In ...

Embodiment 3

[0039] The raw material solution containing butanol, butyl acetate and water at a temperature of 22°C is transported to the heat exchanger 11 through a pipeline at a flow rate of 800kg / h, and is preheated after heat exchange with the bottom liquid of the third rectifying tower 10. Heat it to 75°C, then transport the raw material liquid to the mixer 1, mix it with the raw material liquid from the second phase separator 9, and feed it from the middle and upper part of the first rectification tower 2, the tower of the first rectification tower 2 The number of plates is 38, the operating pressure is normal pressure, and the tower kettle is heated by a reboiler. The steam in the first rectification tower 2 is condensed by the first cooler 3 and then sent to the first phase separator 4 for phase separation. After that, the light phase is returned to the first rectification tower 2, and the heavy phase is transported to the second rectification tower 7. In the first rectification towe...

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

The invention relates to an azeotropic distillation and normal distillation combined process for recycling butanol and butyl acetate. The process is as below: mixing a raw material liquid is with a material liquid from a second phase separator; feeding from the middle upper part of a first distillation column; condensing the steam at the column top by a first cooler; transporting to a first phase splitter for phase split; after phase split, returning a light phase to the first distillation column, and delivering a heavy phase to a second distillation column; condensing the column top steam by a third cooler and delivering to a second phase splitter for phase split; after phase split, transporting a light phase to a mixer for mixing and refluxing a heavy phase, so as to obtain pure water in the second distillation column kettle; conveying the material liquid obtained in the first distillation column kettle to the third distillation column for ordinary distillation; and acquiring a finished product butanol at column top and acquiring a finished product of butyl acetate in the column kettle of the third distillation column. The invention has the advantages of low energy consumption, simple operation process, and acquisition of finished butanol and butyl acetate in the single column through common distillation.

Description

technical field [0001] The invention relates to a process for recovering butanol and butyl acetate in combination with azeotropic rectification and ordinary rectification. Background technique [0002] Antibiotics have been widely used in clinical medicine since they were discovered by humans. They are important chemical drugs for humans to control infectious diseases, protect human health, and prevent and control animal and plant diseases. With the development of the pharmaceutical industry, the types of antibiotics are also increasing, and there are more than 100 types so far. my country's antibiotic production industry is developing rapidly, and now there are more than 300 enterprises producing more than 70 varieties of antibiotics accounting for 20-30% of the world's raw material medicine production, becoming one of the world's major producers of antibiotic preparations. [0003] The production of antibiotics in China is huge. Butanol and butyl acetate are important sol...

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 Applications(China)
IPC IPC(8): C07C27/30C07C29/82C07C31/12C07C67/54C07C69/14
CPCC07C29/82C07C67/54C07C31/12C07C69/14
Inventor 李春利方静张林李红实李柏春
Owner HEBEI UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap