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

A method for refining mixed alcohols by rectification-pervaporation coupled process

A technology of pervaporation and alcohol mixing, applied in the field of separation, can solve the problems of using a large number of rectifying towers, high energy consumption, not in line with energy conservation and environmental protection, etc., so as to save reprocessing costs, achieve high purity, and achieve cleanliness. production effect

Active Publication Date: 2017-07-04
FUZHOU UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of corresponding organic solvents in the stages of azeotropic distillation and extractive distillation, and the number of rectification towers used in the entire separation process is large, the energy consumption is relatively high, which does not meet the requirements of energy conservation and environmental protection.

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
  • A method for refining mixed alcohols by rectification-pervaporation coupled process
  • A method for refining mixed alcohols by rectification-pervaporation coupled process
  • A method for refining mixed alcohols by rectification-pervaporation coupled process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The rectification-pervaporation coupling process refines the method for mixed alcohol, and its specific steps are as follows:

[0029] 1) A mixed alcohol solution with a water content of 93.8wt% and a feed flow rate of 15 L / h, the reflux ratio of the dehydration tower is 1, the feed is fed in the middle, and the dehydration tower T1 rectifies and dehydrates, and the distilled material in the tower still is water. Top distillate composition is as shown in table 1;

[0030] 2) The top product enters the crude separation tower T2, the reflux ratio of the crude separation tower is 3, and the middle part feeds; the content of the tower top product is shown in Table 2, and the content of the tower bottom product is shown in Table 3; the obtained tower bottom product enters the separation Phase device V1, the temperature of the phase separator is 50°C, the oil phase product enters the pervaporation device M2 for further dehydration; the top product of the crude separation towe...

Embodiment 2

[0032] Fischer-Tropsch synthetic wastewater mixed alcohol refining process coupled with rectification-pervaporation process, the specific steps are as follows:

[0033] 1) A mixed alcohol solution with a water content of 93.8wt% and a feed flow rate of 15L / h. The reflux ratio of the dehydration tower is 1, and the feed is fed in the middle. It is dehydrated by rectification and dehydration in the dehydration tower T1. Composition is as shown in table 1;

[0034] 2) The top product enters the crude separation tower T2, the reflux ratio of the crude separation tower is 3, and the middle part feeds; the content of the tower top product is shown in Table 2, and the content of the tower bottom product is shown in Table 3; the obtained tower bottom product enters the separation The phase separator V1, the temperature of the phase separator is 50°C, the oil phase product enters the pervaporation device M2 for further dehydration; the top product directly enters the pervaporation devi...

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

PropertyMeasurementUnit
areaaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for refining mixed alcohol by a rectification-pervaporation coupling process, which belongs to the technical field of separation. The method includes the following steps: aqueous mixed alcohol is sent into a dehydrating tower and rectified to be dehydrated, most of water is removed from the tower kettle, the mixture of the mixed alcohol and a small amount of water which is obtained from the tower top is sent into a rough separation tower and roughly separated, C1-C3 mixed alcohol and a small amount of water which are obtained from the top of the rough separation tower are condensed and then sent into a pervaporation device for further dehydration, the permeation side is water, and the retention side is the C1-C3 mixed alcohol; after C4-C8 mixed alcohol and a small amount of water which are obtained from the tower kettle of the rough separation tower are layered by a phase separator, the oil phase enters the pervaporation device and is separated, and the water phase returns into the dehydration tower. Compared with the prior art, the method does not need to add a third component in the process of dehydration, thus avoiding environment pollution caused by the addition of the third component and saving the retreatment cost for the third component, the process of azeotropic rectification and extractive rectification is omitted, so that energy consumption is reduced, and product quality is increased.

Description

technical field [0001] The invention specifically relates to a method for refining waste water mixed alcohols coupled with rectification-pervaporation processes, and belongs to the field of separation technology. Background technique [0002] At present, the coal liquefaction industry at home and abroad is in the ascendant, and Fischer-Tropsch synthesis is the core technology of indirect coal liquefaction. When producing high-quality liquid fuels, water-phase by-products containing oxygenated organic matter will also be produced. Whether the water-phase by-products can be recovered and treated is an important factor for the successful operation of coal-to-liquids projects. [0003] Oxygenated organic compounds in the aqueous phase by-products of Fischer-Tropsch synthesis are important industrial solvents and organic raw materials in pharmaceutical, fine chemical and other industries. If it is effectively recovered, it will not only help to improve the economic benefits of c...

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): C07C29/76C07C29/80
CPCC07C29/76C07C29/80
Inventor 邱挺蔡璇王红星叶长燊杨臣黄智贤杨金杯李玲陈锦溢王晓达张颖
Owner FUZHOU UNIV
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