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Method for producing propylene

A technology of propylene and ethylene, which is applied in the production of bulk chemicals, chemical instruments and methods, purification/separation of hydrocarbons, etc., can solve the problems of low propylene weight yield, achieve hydrogen saving, increase weight yield, and good activity Effect

Inactive Publication Date: 2016-05-18
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 is provided

Method used

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  • Method for producing propylene
  • Method for producing propylene
  • Method for producing propylene

Examples

Experimental program
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Embodiment 1

[0049] 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 enter the selective hydrogenation catalyst contact reaction with the carbon four raw material to obtain the monoolefin carbon four and carbon five streams, and its components are as shown in table 1, and the monoolefin carbon 5. The C4 stream is mixed with fresh ethylene outside the boundary area 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 passed through an isomerization reactor and a disproportionation reactor. The reaction produces the target product propylene, unreacted ethylene, C5 and C4 olefins, and the r...

Embodiment 2～12

[0055] 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.

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Abstract

The invention relates to a method for producing propylene. The invention mainly aims at solving a problem of low propylene weight yield in prior arts. According to the propylene production method, cracked C5, C4 and ethylene are adopted as raw materials. The method comprises the following steps: a cracked C5 fraction is delivered into a de-cyclopentadiene unit; after reaction separation, a C5 material flow with cyclopentadiene removed is delivered into a selective hydrogenation reactor; under the existences of a hydrogenation catalyst and hydrogen, diolefin is selectively hydrogenated into monoolefine; the obtained monoolefine C5, C4 material and ethylene are mixed; the mixture is treated with an adsorbent; a material flow obtained after adsorption is subjected to a contact reaction with an isomerization catalyst and a disproportionation catalyst, such that a material flow containing a product propylene and unreacted ethylene, C5 and C4 is obtained; and propylene is obtained after separation. With the method, the problem is well solved. The method can be used in industrial production of propylene.

Description

technical field [0001] The present invention relates to a process for the production of propylene. 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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IPC IPC(8): C07C6/04C07C11/06C07C13/61C07C7/00
CPCY02P20/52
Inventor 董静刘苏宣东
Owner CHINA PETROLEUM & CHEM CORP
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