Preparation method of polymer grade piperyene

A technology of pentadiene and polymerization grade, applied in the field of preparation of polymer grade piperylene, can solve the problems that separation technology is difficult to purify and purify, uneconomical, very high in equipment requirements and operating process conditions, and achieves high purification accuracy. , the effect of easy industrial production

Inactive Publication Date: 2006-06-21
SHANDONG YUHUANG CHEM CO LTD
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned piperylene raw material contains other components whose boiling point is similar or the same, and it is difficult to purify and refine it by ordinary separation technology. High, it is very uneconomical to apply in industry

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
  • Preparation method of polymer grade piperyene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The piperylene raw material enters the first extraction tower in the presence of the polymerization inhibitor SP-731, the operating pressure is: 0.12Mpa, the temperature is 50°C, the reflux ratio is 6, and the feed temperature of the extraction agent dimethylformamide added to the top of the tower is first Preheating to 60°C, the volume ratio to the raw material is 4:1, cyclopentene, cyclopentane and light components are removed from the top of the tower, and the extractant and piperylene materials are obtained from the tower reactor; the first extraction tower The materials in the still enter the first desorption tower, the operating pressure is normal pressure, the temperature is 40°C, and the reflux ratio is 1. High-purity piperylene containing cyclopentadiene and alkyne is obtained at the top of the tower, and the extractant in the tower is returned to the first extraction tower for circulation Use; the high-purity piperylene at the top of the first analysis tower en...

Embodiment 2

[0029] The piperylene raw material enters the first extraction tower in the presence of the polymerization inhibitor SP-731, the operating pressure is: 0.18Mpa, the temperature is 135°C, the reflux ratio is 10, and the feed temperature of the extractant dimethylformamide added to the top of the tower is first Preheating to 90°C, with a volume ratio of 10:1 to the amount of raw material, cyclopentene, cyclopentane and light components are removed from the top of the tower, and the extractant and piperylene materials are obtained from the tower reactor; the first extraction tower The materials in the still enter the first desorption tower, the operating pressure is normal pressure, the temperature is 160°C, and the reflux ratio is 5. High-purity piperylene containing cyclopentadiene and alkynes is obtained at the top of the tower, and the extraction agent in the tower is returned to the first extraction tower for circulation Use; the high-purity piperylene at the top of the first...

Embodiment 3

[0031] The piperylene raw material enters the first extraction tower in the presence of the polymerization inhibitor SP-731, the operating pressure is: 0.15Mpa, the temperature is 85°C, the reflux ratio is 8, and the feed temperature of the extraction agent dimethylformamide added to the top of the tower is first Preheating to 70°C, the volume ratio to the raw material is 7:1, cyclopentene, cyclopentane and light components are removed from the top of the tower, and the extractant and piperylene materials are obtained from the tower reactor; the first extraction tower The material in the kettle enters the first desorption tower, the operating pressure is normal pressure, the temperature is 100°C, and the reflux ratio is 3. High-purity piperylene containing cyclopentadiene and alkyne is obtained at the top of the tower, and the extractant in the tower is returned to the first extraction tower for circulation Use; the high-purity piperylene at the top of the first analysis tower ...

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 a method for preparing polymer grade pentadiene. Feeding the raw material of pentadiene into the first extraction tower in existence of polymerization inhibitor, getting extracting agent and pentadiene in tower still; feeding the material got in the first extraction tower into the first analysizing tower, getting pentadiene of high purity containing cyclopentadiene and alkyne; feeding the high pure pentadiene into fractionating tower, getting pentadiene of high purity containinging little amount of cyclopentadiene and alkyne in tower top; feeding the material gor in fractionating tower top into the second extraction tower in existence of polymerization inhibitor 731, getting pentadiene in tower top, feeding the extraction agent, cyclopentadiene and alkyne in tower still into the second analyzing tower; stripping cyclopentadiene and alkyne in the second analyzing tower top, the extraction agent in tower still being returned to the second extraction tower for recyclic use. The invention employs the second-time extractive distillation method, preparing pentadiene from raw material, and is characterized by high extraction accuracy and easy for industrial production.

Description

(1) Technical field [0001] The invention relates to a preparation method of polymer grade piperylene, in particular to a method for further purification of piperylene obtained by separating carbon five, a by-product of petroleum cracking to ethylene. (2) Background technology [0002] In the process of producing ethylene from petroleum cracking, C5 by-products account for 12%-14%. In 2005, my country's ethylene processing capacity reached 7.5 million tons, producing more than 1 million tons of C5 by-products. Since the C5 fraction contains diolefins such as isoprene, cyclopentadiene, and piperylene, these diolefins are chemically active and are very important chemical raw materials. The development and utilization of these three kinds of diolefins are earlier in foreign countries and domestically, especially isoprene and cyclopentadiene (dicyclopentadiene) are widely used. Since the purity of piperylene is usually between 65% and 70%, And it contains 20%-25% cyclopentene, 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 Applications(China)
IPC IPC(8): C07C7/00C07C7/10C07C7/20C07C11/20
Inventor 王金书王宝刚张金平崔树峰
Owner SHANDONG YUHUANG CHEM CO LTD
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