Method for depredating acetylene hydrocarbon in cracked carbon-5 distillate by acetylene hydrocarbon post-depredation process

A post-dealkyne and carbon cracking technology, applied in chemical instruments and methods, distillation purification/separation, hydrocarbon purification/separation, etc., can solve problems such as isoprene loss, reduce operating costs, increase productivity, The effect of improving load conditions

Inactive Publication Date: 2012-11-21
NANJING TECH UNIV
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  • Description
  • Claims
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Problems solved by technology

[0019] The purpose of the present invention is to propose a method for removing alkyne in cracked C5 cuts by post-dealkyne process in order to solve the problem of isoprene loss caused by dealkyne process in the prior art

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  • Method for depredating acetylene hydrocarbon in cracked carbon-5 distillate by acetylene hydrocarbon post-depredation process

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Embodiment Construction

[0054] For the flow of the embodiment, see figure 1 . As shown in the figure, devices A to I are basically similar to the prior art, but the light removal tower J and the associated logistics pipeline are the innovation points of the present invention. In this embodiment, the theoretical plate number of the re-light stripping tower is 40, the positions of the upper and lower feed ports are respectively 16 and 26, and the reflux ratio is 8. The stream mass concentration data of each tower is shown in Table 1.

[0055] Table 1 embodiment stream concentration data (w%)

[0056] Feed Dtop Gtop Htop Hlow Itop Jtop Jbottom

[0057] Carbon 4 7.54 0.04 0.06

[0058] 3-Methylbutene-1 0.94 5.70 8.42 0.10

[0059] n-Pentane 6.65 24.63 17.52 13.87

[0060] Pentene-1 4.72 14.77 15.56 4.80

[0061] 2-Methylbutene-1 6.98 17.42 16.87 6.76

[0062] Transpentene-2 ​​3.20 11.30 0.01 0.07 1.98 10.57

[0063] Cis-pentene-2 ​​2.07 7.08 0.01 0.07 0.61 7.09

[0064] Pentadie...

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Abstract

The invention relates to a method for depredating acetylene hydrocarbon in cracked carbon-5 distillate by an acetylene hydrocarbon post-depredation process. The method is characterized in that after typical chemical separation process processing such as primary extraction, prolapsed, secondary extraction, lightness-removing, and the like, the carbon-5 distillate is provided with a re-lightness-removing column (postpositive lightness-removing column) in order to avoid physical distribution of acetylene hydrocarbon with high concentration, and the re-lightness-removing column discharges the acetylene hydrocarbon distillate from the flow, thereby the fatalness for the explosion of acetylene hydrocarbon is avoided in the isoprene separation process, and meanwhile, no precious isoprene is wasted to release the acetylene hydrocarbon distillate for safety.

Description

technical field [0001] The invention relates to a separation method for cracking C5 fraction (C5), in particular to a method for removing alkynes in cracking C5 fraction by adopting a post-dealkyne method. Background technique [0002] A considerable amount of C5 fractions (referred to as cracked C5 fractions) are produced in the process of pyrolysis of petroleum hydrocarbons to produce ethylene, which contains more than 30 components with similar boiling points, and the component with high utilization value and high content is isoprene , cyclopentadiene and piperylene, the three account for about 40-55% of the cracked C5 fraction. [0003] With the development of the petrochemical industry, the production capacity of producing ethylene from liquid hydrocarbons is increasing. After entering the 21st century, the output of cracked C5 in my country has exceeded 1 million tons per year, and the main components of isoprene, cyclopentadiene and piperylene can be processed to pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/18C07C7/00C07C7/04C07C7/08C07C7/177
Inventor 云志史美仁包宗宏钱仁渊张菊珍
Owner NANJING TECH UNIV
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