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

Efficient tetrahydrofuran recovery method

A technology of tetrahydrofuran and recovery methods, which is applied in the field of recovery, can solve the problems of large environmental pollution, etc., and achieve the effects of high separation efficiency, low price, improved recovery rate and utilization rate

Inactive Publication Date: 2018-04-24
CHENGDU ORGANOCHEM CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that polytetrahydrofuran waste articles have great environmental pollution, and the purpose is to provide a recovery method for efficiently recovering tetrahydrofuran, so as to solve the problem that polytetrahydrofuran waste articles have great environmental pollution

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] The recovery method of the present invention efficiently reclaims tetrahydrofuran, comprises the following steps:

[0024] S1, dubbed polytetrahydrofuran alcohol degradation system;

[0025] S2. The polytetrahydrofuran alcohol degradation system in step S1 is degraded under the condition of normal pressure and 90-300°C, and at the same time, the generated tetrahydrofuran vapor is condensed and collected until no steam is generated in the reaction system, and crude tetrahydrofuran is obtained;

[0026] S3. Add the crude tetrahydrofuran in step S2 to the still, add a reducing agent to remove the peroxide in the crude tetrahydrofuran, heat and distill, and condense and collect the evaporated tetrahydrofuran containing water in a storage tank;

[0027] S4, adding solid potassium hydroxide to the mixed fraction of water tetrahydrofuran in step S3, stirring for 2.5-3 hours, standing still for 3-4 hours, divided into upper and lower layers, separated, and the upper layer is TH...

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 discloses an efficient tetrahydrofuran recovery method. The method comprises the following steps: a polytetrahydrofuran alcohol degradation system is prepared; the polytetrahydrofuran alcohol degradation system is degraded under the conditions of normal pressure and 90-300 DEG C, generated tetrahydrofuran steam is condensed and collected until no steam is generated by the reaction system, and crude tetrahydrofuran is obtained; crude tetrahydrofuran is added to a distillation still, a reducing agent is added for removing peroxide from crude tetrahydrofuran, crude tetrahydrofuran is heated and distilled, and water-containing tetrahydrofuran which is steamed out is condensed and collected in a storage tank; solid potassium hydroxide is added to mixed fraction of water-containingtetrahydrofuran, water-containing crude tetrahydrofuran is divided into an upper layer and a lower layer, the layers are separated, and the upper layer is a tetrahydrofuran liquid; the tetrahydrofuran liquid is extracted and rectified in a rectifying tower, and a pure tetrahydrofuran product is obtained. The problem of environmental pollution by waste polytetrahydrofuran is solved, and tetrahydrofuran can be recovered.

Description

technical field [0001] The invention relates to a recovery method, in particular to a recovery method for efficiently recovering tetrahydrofuran. Background technique [0002] Tetrahydrofuran is an important organic chemical and fine chemical raw material. It has good solubility to many organic and inorganic substances. It can dissolve all compounds except polyethylene, polypropylene and fluororesin. It is widely used as a reactive solvent. "Universal Solvent". [0003] Polytetrahydrofuran is mainly used as the soft segment of block polyurethane and block polyether polyester, and the block polyurethane rubber formed by its copolymerization can be used as tires, transmission belts, gaskets, coatings, artificial leather, films, etc. The block polyether polyester is a thermoplastic elastomer, and polytetrahydrofuran has a wide range of applications, but it produces a lot of waste and pollutes the environment. Contents of the invention [0004] The technical problem to be so...

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
IPC IPC(8): C07D307/08
CPCC07D307/08
Inventor 谈平安谈平忠陈军
Owner CHENGDU ORGANOCHEM 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