Method for preparing propylene by using cracking C5 fraction

A technology for cracking carbon and propylene, which is applied in the direction of double decomposition reaction to produce hydrocarbons, chemical instruments and methods, hydrocarbons, etc. It can solve the problems of low propylene weight yield, save hydrogen, increase weight yield, and increase propylene yield Effect
CN104109071AActive Publication Date: 2014-10-22CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2014-10-22

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Abstract

The invention relates to a method for preparing propylene by using a cracking C5 fraction. The problem of low mass yield of propylene in the prior art is mainly solved. The method for preparing propylene by using cracking C5 fraction, adopting the cracking C5 fraction and ethylene as raw materials, comprises the following steps: sending the cracking C5 fraction to a cyclopentadiene removal unit, reacting, separating to obtain a cyclopentadiene removed C5 flow, sending the cyclopentadiene removed C5 flow to a selective hydrogenation reactor, selectively hydrogenating diolefin in the presence of a hydrogenation catalyst and hydrogen to obtain monoolefin, mixing the obtained monoolefin C5 material with ethylene, processing by an adsorbent, allowing the obtained adsorption flow to contact and react with a disproportionation catalyst to obtain a flow containing a product propylene, unreacted ethylene and C5, and separating to obtain propylene. The method well solves the problem, and can be used in the industrial production for preparing propylene by using the cracking C5 fraction.
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Description

technical field

[0001] The invention relates to a method for cracking carbon five fractions to produce 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 sta...

Claims

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