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Liquid isomerization for metathesis process

A technology of isomerization and metathesis, which is used in the fields of isomerization to produce hydrocarbons, metathesis reaction to produce hydrocarbons, chemical instruments and methods, etc., and can solve the problem that the steam cracker is not enough to meet the demand of propylene.

Pending Publication Date: 2020-03-06
TECH PRECESS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, new steam crackers built only to meet the growing demand for ethylene are not enough to meet the growing demand for propylene

Method used

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  • Liquid isomerization for metathesis process
  • Liquid isomerization for metathesis process
  • Liquid isomerization for metathesis process

Examples

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Embodiment Construction

[0032] Thermal and catalytic cracking can produce a variety of products. Feedstocks for these units range from ethane to vacuum gas oil. Various products can be produced from this system, including gasoline products and / or light products such as propylene and / or ethylene.

[0033] For example, in a typical olefins plant, there is a front-end demethanizer to remove methane and hydrogen, followed by a deethanizer to remove ethane, ethylene, and C 2 alkyne. The bottom product of the deethanizer consists of carbon numbers ranging from C 3 to C 6 mixture of compounds. This mixture can usually be separated into different carbon numbers by fractional distillation.

[0034] C 3 Fractions (mainly propylene) are removed as products and ultimately used for the production of polypropylene or, for example, for the chemical synthesis of propylene oxide, cumene or acrylonitrile. Methylacetylene and propadiene (MAPD) ​​impurities must be removed by fractional distillation or hydrogenatio...

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PUM

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Abstract

The present disclosure relates to processes for improved yields of propylene via metathesis, primarily from the conversion of C4 and C5 + olefins obtained from steam or fluid catalytic cracking of hydrocarbons. In particular, the present disclosure relates to processes for preparing propylene by improved isomerization of 1-butene to 2-butene relative to the metathesis reaction.

Description

technical field [0001] Embodiments shown herein generally relate to the processing of hydrocarbons from cracking processes such as steam catalytic cracking or fluid catalytic cracking, primarily for the conversion of C 4 and C 5 + Alkenes are converted to propylene. More specifically, embodiments disclosed herein relate to processes for the production of propylene by improved isomerization of 1-butene to 2-butene relative to metathesis reactions. Background technique [0002] Propylene is one of the fastest growing petrochemical products mainly due to the high growth rate of polypropylene. Typically, about 55% of this propylene is produced by steam crackers, 30% by refinery fluid catalytic cracking (FCC) units, and 15% by purposeful processes such as propane dehydrogenation or metathesis. Propylene demand has grown faster than ethylene (also produced via steam crackers) demand. Therefore, new steam crackers built only to meet the growing demand for ethylene are not enou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/163C07C11/06
CPCC07C5/2556C07C6/04C07C7/005C07C7/04C07C2521/04C07C2521/08C07C2523/30C07C2523/36C07C2523/44Y02P20/52C07C11/08C07C11/06C07C5/25
Inventor S·埃维特C·F·范埃格蒙德V·赖希Y·西蒙B·德斯图尔
Owner TECH PRECESS TECH INC