Method for separating dialkene in cracking C5 fraction

A technology for cracking carbon and pentadiene, which is used in distillation purification/separation, hydrocarbon purification/separation, chemical instruments and methods, etc., can solve the problems of complex purification methods, long process flow and high energy consumption

Active Publication Date: 2014-09-24
CHINA PETROLEUM & CHEM CORP +1
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention proposes in order to solve the problems of complicated process and high energy consumption of the piperylene purification method existing in the prior art, long process flow and high energy consumption of the separation of polymerization-grade isoprene products from the cracked C5 fraction, etc. A method for using C5 raffinate to assist rectification of piperylene material to improve purity and a method for separating polymerization-grade isoprene products using the method

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
  • Method for separating dialkene in cracking C5 fraction
  • Method for separating dialkene in cracking C5 fraction
  • Method for separating dialkene in cracking C5 fraction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070]Using the cracked C5 fraction of a certain factory as raw material, the hydrogenation rectification separation method of the present invention is used to separate the cracked C5 fraction. The composition of the raw material and the composition of the incoming and outgoing streams of each operating device are listed in the following table.

[0071] (1) Weight removal: the cracked C5 raw material enters the middle part of the weight removal reaction distillation tower 1, and the flow rate of the cracked C5 raw material is 6.3 tons / hour. The weight removal reaction distillation tower has 110 theoretical plates, and the reflux ratio is 15, and the temperature at the top of the tower is 45°C. Through the reactive distillation process, the stream containing isoprene is extracted from the top of the de-weighting reactive distillation tower 1, and the stream containing isoprene is extracted from the bottom of the de-weighting reactive distillation tower 1. The stream of alkene, t...

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 objective of the invention is to overcome the problems that a conventional purification method for m-pentadiene is complex and has high energy consumption, process flow for separating a polymer-grade isoprene product from a cracking C5 fraction is long, energy consumption for separating the polymer-grade isoprene product from the cracking C5 fraction is high, etc. in the prior art. According to a method for separating dialkene in the cracking C5 fraction provided by the invention, raffinate is added into feed of an m-pentadiene refining tower to reduce the content of cyclopentadiene in an m-pentadiene product and to improve product quality; the cracking C5 fraction successively undergoes heavy component-removing reactive rectification, light component removal, extraction and desorption, refining of an isoprene product, removal of C5, refining of m-pentadiene, removal of C6, refining of dicyclopentadiene, etc. so as to prepare the polymer-grade isoprene product, the m-pentadiene product and the dicyclopentadiene product. The method provided by the invention has the advantages of short process flow, low energy consumption, low construction and operation cost, high product quality, etc.

Description

technical field [0001] The present invention relates to a separation method of cracked carbon five fractions, more specifically, the present invention relates to a method for separating cracked carbon five fractions by adopting reactive distillation technology and extraction technology. Background technique [0002] In the process of producing ethylene from petroleum cracking, a considerable amount of C5 fraction is by-produced, and the C5 fraction is rich in diolefins such as isoprene, cyclopentadiene and piperylene. These diolefins are chemically active and are important chemical raw materials. Due to the difference in cracking raw materials, cracking depth and separation degree of petroleum hydrocarbons, the content of diolefins in the cracked C5 fraction is different, and the total content is between 40% and 60%. Therefore, the separation and utilization of C5 fractions has far-reaching significance for improving the economic benefits of ethylene plants and comprehensiv...

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): C07C7/04C07C7/06C07C7/177C07C7/08C07C7/167C07C11/18C07C11/20C07C13/15C07C13/61
CPCY02P20/10
Inventor 田保亮杜春鹏
Owner CHINA PETROLEUM & CHEM CORP
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