Method for producing propylene from C5

A technology for propylene and ethylene, applied in the field of C5 production of propylene, can solve the problems of low propylene weight yield and the like, and achieve the effects of saving hydrogen, increasing yield and improving economic benefits

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The technical problem to be solved by the present invention is the problem of low propylene weight yield in the prior art, and a new method for producing propylene from carbon five is provided

Method used

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  • Method for producing propylene from C5
  • Method for producing propylene from C5
  • Method for producing propylene from C5

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] according to figure 1 Shown technological process, the component of cracking C5 fraction is as shown in table 1, obtains the C5 fraction not containing cyclopentadiene after decyclopentadiene unit removes the cyclopentadiene in raw material, removes The carbon five distillate components of dicyclopentadiene are as shown in Table 1, and then contacted with a selective hydrogenation catalyst to obtain a mono-olefin carbon five stream, and its components are as shown in table 1, and the mono-olefin carbon five stream and the out-of-boundary Fresh ethylene is mixed to form a mixed raw material. The mixed raw material is treated by an adsorbent in an adsorption tower to remove impurities in the raw material. The treated material is reacted in an isomerization reactor and a disproportionation reactor to obtain the target product propylene and unreacted ethylene. And carbon pentaolefins, the reaction product is passed through the separation unit to obtain polymer grade propyle...

Embodiment 2～12

[0043] React by each condition and step of embodiment 1, just change different operating parameters, select the component of hydrogenation catalyst, adsorbent as shown in table 2, the component of isomerization catalyst and disproportionation catalyst as shown in table 3 , the operating conditions of the decyclopentadiene unit are shown in Table 4, the operating conditions of the selected hydrogenation reactor and the adsorption tower are shown in Table 5, and the operating conditions of the isomerization reactor and the disproportionation reactor are shown in Table 6 , and the reaction results are shown in Table 7.

[0044]

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Abstract

The invention relates to a method for producing propylene from C5 and mainly aims at solving the problem of low yield of propylene by weight in the prior art. The problem is well solved by use of the following technical scheme: the method for producing propylene from C5 is adopted and cracked C5 and ethylene are taken as raw materials; the method comprises the following steps: feeding the cracked C5 fraction into a cyclopentadiene removal unit, feeding a C5 material flow removed from the cyclopentadiene and obtained after reaction separation into a selective hydrogenation reactor, performing selective hydrogenation on a diolefin to obtain monoolefines in the presence of a hydrogenation catalyst and hydrogen, mixing the obtained monoolefine C5 material with the ethylene, next, treating by use of an adsorbent, performing a contact reaction on the obtained adsorbed material flow in the presence of an isomerization catalyst and a disproportionation catalyst to obtain a material flow containing the product propylene and the non-reacted ethylene and C5, and separating to obtain the propylene; and the method is applicable to the industrial production of producing propylene from C5.

Description

technical field [0001] The invention relates to a method for producing propylene from carbon five. Background technique [0002] The invention relates to a method for comprehensively utilizing cracked C5 fractions, in particular, the invention relates to a method for comprehensively utilizing cracked C5 fractions to produce ethylene and propylene. [0003] About 15-20% of carbon five fractions are by-produced in the process of petroleum cracking to ethylene. With the continuous expansion of ethylene plants and the continuous improvement of production capacity, the by-product cracked C5 fraction is also increasing. How to comprehensively and effectively use this fraction is a common concern of various petroleum and petrochemical enterprises today. And as the benefit improvement space of ethylene plants gradually shrinks, all enterprises are also forced to turn their attention to the comprehensive utilization of this part of the distillate, rather than just staying in the use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/06C07C6/04C07C7/177C07C7/163C07C7/13C07C5/22C07C11/10C07C13/61
Inventor 刘苏宣东王仰东
Owner CHINA PETROLEUM & CHEM CORP
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