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Hydrocarbon dehydrogenation process

A dehydrogenation and catalytic dehydrogenation technology, applied in the field of hydrocarbons, can solve the problem of the maximum temperature limit of oxidation reheating capacity and other issues

Active Publication Date: 2012-02-01
UOP LLC +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Modification of existing catalytic dehydrogenation plants without oxidative reheat capability to increase productivity is limited by the reactor internal velocity and the maximum temperature of the reactor transfer line
Due to these limitations of existing equipment, the maximum possible capacity expansion of 35% can be achieved by simply increasing the production capacity of existing reactors

Method used

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Embodiment Construction

[0009] Aromatic hydrocarbon dehydrogenation processes are widely used in industry. For example, large quantities of styrene are produced by the dehydrogenation of ethylbenzene. The resulting styrene can be polymerized with itself, or it can be copolymerized with butadiene, isoprene, acrylonitrile, and the like. Other hydrocarbons that can be dehydrogenated in much the same way include diethylbenzene, ethyltoluene, propylbenzene, and cumene. The subject methods are also applicable to the dehydrogenation of other types of hydrocarbons, including the dehydrogenation of relatively pure or mixed C2-C16 paraffin streams. The method is therefore applicable to the dehydrogenation of propane, butane, hexane or nonane. However, since the vast majority of current industrial dehydrogenation processes are used for the dehydrogenation of ethylbenzene, the following description of the subject matter of the present invention will mainly be described with respect to the dehydrogenation of et...

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Abstract

A process for the catalytic dehydrogenation of a C3+ feed hydrocarbon. The hydrocarbon feedstock is initially divided and a first portion of the feedstock is introduced into a first dehydrogenation reaction zone operated without oxidative reheat and the resulting effluent is introduced into a second dehydrogenation reaction zone operated without oxidative reheat. The resulting effluent from the second dehydrogenation reaction zone is introduced along with a second portion of the feedstock into a third dehydrogenation reaction zone operated with oxidative reheat.

Description

technical field [0001] The technical field that the present invention relates to is the catalytic dehydrogenation of hydrocarbons. More specifically, the present invention is a process for the dehydrogenation of hydrocarbons, including paraffins and alkylaromatics. Background of the invention [0002] Retrofitting existing catalytic dehydrogenation plants without oxidative reheat capability to increase productivity is limited by the reactor internal velocity and the maximum temperature of the reactor transfer line. Due to these limitations of existing equipment, a maximum capacity expansion of 35% is possible by simply increasing the throughput of existing reactors. [0003] It is well known to dehydrogenate hydrocarbons, whereby both acyclic and aromatic hydrocarbons are converted to corresponding less saturated products. For example, styrene is produced industrially from the dehydrogenation of ethylbenzene. US 3,515,766 and US 3,409,689 disclose catalytic steam dehydrog...

Claims

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Application Information

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IPC IPC(8): C10G65/02C10G45/02
CPCC10G11/00C10G2300/807C10G55/06C10G51/026C10G2300/1096C10G2300/1081
Inventor S・拉姆A・C・加米G・B・伍德勒
Owner UOP LLC