Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for producing propylene by employing extracted C4

A technology for extracting C4 and propylene, which is applied in the direction of organic chemistry and metathesis reaction to produce hydrocarbons, can solve the problems of short catalyst life and low butene conversion rate, so as to improve the service life, reduce the influence of impurities on the catalyst, and improve active effect

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The technical problem to be solved by the present invention is the problem of short catalyst life and low butene conversion rate in the production of propylene from C4 in the prior art, and a new method for extracting C4 to produce propylene is provided

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 producing propylene by employing extracted C4
  • Method for producing propylene by employing extracted C4
  • Method for producing propylene by employing extracted C4

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Using the extracted C42 in Table 1 as the raw material, the first C4 material is obtained after the C4 raw material is removed from heavy components such as the polymerization inhibitor in the raw material through the de-weight tower, and the dimethyl ether therein is removed through the de-light tower The second C4 material is obtained, and then the butadiene and isobutene in the raw material are removed through the deisobutanizer to obtain the third C4 material. The mixed material is formed after the stream and the circulating C4 are mixed, and the mixed material is removed after being treated by an impurity processor. Impurities in the raw materials, including water, alcohol, ether and other polar substances, the pretreated materials enter the disproportionation reactor for reaction, and the reaction products propylene, pentene and unreacted carbon tetraolefins are obtained, and the reaction products pass through the deethylene tower , to obtain ethylene from the top ...

Embodiment 2～6

[0046] React by each condition and step of embodiment 1, just change different operating parameters, its disproportionation catalyst and the component of sorbent are shown in Table 2, disproportionation reaction conditions and reaction result are listed in Table 3, light removal tower and weight removal tower The operating conditions of the isobutanizer are shown in Table 4, the operating conditions of the deisobutanizer are shown in Table 5, and the operating conditions of the deethylene tower and the depropylene tower are shown in Table 6.

[0047] Table 2

[0048]

[0049] table 3

[0050]

[0051] Table 4

[0052]

[0053] table 5

[0054]

[0055] Table 6

[0056]

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 a utilization method for extracted C4 by employing a butadiene device. By the method for producing propylene by employing extracted C4, the problems that a catalyst in the prior art is short in service life and low in butene conversion rate are mainly solved. The method comprises the following steps: with extracted C4 as a raw material, respectively processing the C4 raw material through a de-heavy fractionator, a refining tower and a deisobutanizer, and obtaining C4 material flow containing 1-butene and 2-butene; and processing the C4 material flow with a disproportionation reactor, an ethylene removal tower and a depropenizer to obtain the product propylene. The method can be applied to industrial production of propylene production by employing the extracted C4.

Description

technical field [0001] The invention relates to a method for extracting carbon four to produce propylene. Background technique [0002] The traditional methods of ethylene co-production and refinery recovery of propylene are obviously difficult to meet the growing demand for propylene. The use of olefin disproportionation technology can digest C without reducing the cracking severity of naphtha. 4 Distillate, and can increase the production of propylene, so the research and development of olefin disproportionation to propylene technology is not only to improve the production of propylene, but also to promote low value-added C 4 The comprehensive utilization of distillates is of great significance, among which the disproportionation of butene involved in the present invention to produce propylene is a promising process. [0003] Olefin disproportionation reaction, also known as olefin double bond replacement reaction, is an olefin conversion phenomenon discovered in the 1960...

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): C07C6/04C07C11/06
Inventor 刘苏宣东董静
Owner CHINA PETROLEUM & CHEM CORP