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C5 diolefin auto-agglutination or copolymerization inhibition method

A diolefin and self-polymerization technology, applied in the purification/separation of hydrocarbons, chemical instruments and methods, hydrocarbons, etc., can solve problems affecting mass transfer, heat transfer, consumption of C5 materials, and equipment operating performance degradation, etc., to achieve Good polymerization inhibition effect

Active Publication Date: 2014-07-02
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fouling can be produced on many equipment, such as: preheater, condenser, fractionation tower and reboiler, etc. The generation of fouling ranges from consumption of C5 materials to blockage of towers, pipelines, heat exchangers and reboilers. Etc., affect mass transfer, heat transfer, reduce equipment operation performance, shorten operation cycle, and more seriously, damage equipment, cause a series of production accidents, and even cause sudden shutdown

Method used

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  • C5 diolefin auto-agglutination or copolymerization inhibition method
  • C5 diolefin auto-agglutination or copolymerization inhibition method
  • C5 diolefin auto-agglutination or copolymerization inhibition method

Examples

Experimental program
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Effect test

Embodiment 1～10

[0011] 1. Preparation of polymerization inhibitor

[0012] Take the required amount of component A, component B, and component C and dissolve them in a solvent to prepare a polymerization inhibitor for later use, and control the total content of component A, component B, and component C to be 25-45 wt%. The results of each embodiment are listed in Table 1.

[0013] 2. Sealing test of polymerization inhibitor

[0014] Static glass seal evaluation method

[0015] ①Use a sample injector to add the prepared polymerization inhibitor into C5 according to the required amount, divide it into two parallel samples of A and B, put them into glass tubes and seal them well, and at the same time install the blank sample without polymerization inhibitor.

[0016] ②Put it in the oven, conduct the test according to the designed temperature and time, take it out after the time is up, cool it down to room temperature, and weigh it.

[0017] ③Unscrew the sealing cap in the fume hood, and volat...

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Abstract

The invention relates to a C5 diolefin auto-agglutination or copolymerization inhibition method in C5 fraction separation process of petroleum, a polymerization inhibitor is added into a C5 fraction material, the polymerization inhibitor in the C5 fraction material is maintained at a certain amount, the polymerization inhibitor comprises component A N, N-diethylhydroxylamine, component B N,N'-di-sec-butyl-1,4-phenylenediamine and component C succinimide, the weight ratio of component A to component B to component C is (0.1-3):1-3 :0.1-3, and taking the total amount of the component A, component B and component C as a reference, the polymerization inhibitor in the C5 fraction material is maintained at the amount of 20-600ppm; the polymerization inhibitor used in the method is good in polymerization inhibition effect and good in versatility, a big difference in the boiling point between each component and solvent and isoprene, cyclopentadiene (or dicyclopentadiene), piperylene and other diolefins in C5 fraction is existed, so that the components and solvents can be separated in the separation process without further increase of a separation process.

Description

technical field [0001] The invention relates to a method for inhibiting the self-polymerization or copolymerization of carbon five diolefins in the separation process of petroleum carbon five fractions, in particular to inhibiting carbon five diolefins by adding a polymerization inhibitor to the carbon five fraction materials during the separation process of cracking carbon five fractions. Olefin self-polymerization or copolymerization method. Background technique [0002] In the process of producing ethylene from petroleum cracking, a considerable amount of C5 fraction is produced by-product, and the C5 fraction contains about 40-60% diolefins such as isoprene, cyclopentadiene and piperylene. The chemical properties of these diolefins are It is active and is an important raw material for many fine chemical products. Therefore, the separation and utilization of C5 fractions is very meaningful for improving the economic benefits of ethylene plants and comprehensively utilizin...

Claims

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Application Information

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IPC IPC(8): C07C11/18C07C11/20C07C13/15C07C13/61C07C7/20
Inventor 王福善潘广勤张霖邓廷昌程嘉杰陈明衍赵小龙张耀亨刘栓祥徐惠俭石铭齐永新王弘马斌杨成洁张阳志刘青利张建平刘嘉彤李红春
Owner PETROCHINA CO LTD
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