Method for processing an olefin-containing product stream

一种烯烃、物流的技术，应用在处理含烯烃的产物流领域

Inactive Publication Date: 2009-10-28
EXXONMOBIL CHEM PAT INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also, it is only slightly polar so may be difficult to remove by absorption

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  • Method for processing an olefin-containing product stream

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Embodiment Construction

[0014] The present invention provides a process for the efficient removal of undesired oxygenates from olefin streams, particularly olefin streams from methanol synthesis. This method is realized in an economical manner.

[0015] According to the present invention, oxygenates are scrubbed from the gaseous olefin product stream after at least one compression step and prior to drying the olefin product. Oxygenates are washed out with methanol in a scrubber.

[0016] The present invention is based on the fact that the drying steps required in conventional ethylene plants cannot handle more than very small amounts of oxygenates such as aldehydes and ketones. Furthermore, such oxygenates can polymerize under certain conditions, and the polymerization reaction can very rapidly degrade the active surface of conventional drying schemes. Currently, there are no known dryers suitable for handling such components. For this reason, oxygenates must be removed from the product stream bef...

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Abstract

A method is described for processing an olefin-containing product stream (1) that contains, besides ethylene and propylene, longer-chain olefins and compounds of hydrocarbons with oxygen (oxygenates). Such a product stream (1) can occur in particular in olefin synthesis from methanol. The product stream is dewatered in successive process steps, optionally compressed in several steps and dried. Then it is subjected to fractionation. For removal of the undesired oxygenates it is proposed that the oxygenates be washed out of the gaseous product stream after the compression steps and before the drying step in a column (12) with methanol.

Description

[0001] This application is a divisional application of a Chinese patent application with a filing date of October 11, 2002, an application number of 02820419.0, and an invention title of "Method for Treating a Product Stream Containing Olefins". [0002] This application claims the filing date benefit of German Patent Application No. 101 50480.2, filed 16.10.2001. field of invention [0003] The present invention relates to a process for the treatment of an olefin-containing product stream comprising, in addition to ethylene and propylene, long-chain olefins and compounds of hydrocarbons and oxygen (oxygenates), wherein the product stream is dehydrated in a continuous process step, optionally is compressed and dried in several steps, and then sent for fractional distillation. Background of the invention [0004] The production of olefins from methanol is considered an interesting alternative to the traditional production of olefins from petroleum. Methanol is considered an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/04C07C7/00C07C1/20C07C11/04C07C11/06C07C7/09C07C7/11
CPCC07C7/11C07C7/005Y02P30/20Y02P30/40C07C11/02C07C7/20
Inventor W·博格曼J·孔克尔H·弗里兹G·劳尔曼R·瓦尔茨尔K·米勒
Owner EXXONMOBIL CHEM PAT INC
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