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Process for the purification of 1,3-butadiene from an oxidative dehydrogenation process

一种丁二烯、丁烯的技术，应用在烃的脱氢领域

Active Publication Date: 2016-01-13
UOP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another route to butadiene is by catalytic oxidative dehydrogenation of n-butenes, which gives higher butadiene concentrations but also some undesirable products that must be removed

Method used

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  • Process for the purification of 1,3-butadiene from an oxidative dehydrogenation process
  • Process for the purification of 1,3-butadiene from an oxidative dehydrogenation process

Examples

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preparation example Construction

[0012] The production of butadiene can be carried out by oxidative dehydrogenation of n-butene. The oxidative dehydrogenation process provides an attractive route for the production of butadiene because there are lower concentrations of undesirable compounds such as isobutene or isobutane that need to be removed. This reduces separation costs due to fewer close-boiling compounds.

[0013] Oxidative dehydrogenation is a process for dehydrogenating n-butenes by contacting paraffins with a catalyst. Oxidative dehydrogenation is an exothermic process that avoids some of the thermodynamic constraints of non-oxidative dehydrogenation processes by forming water as a by-product. Additionally, carbon deposition is minimized or eliminated for a more stable catalytic process.

[0014] Oxidative dehydrogenation uses catalysts such as vanadium oxide, molybdenum oxide, chromium oxide or vanadium magnesium oxide catalysts, or even combinations of metal oxides on supports. The support may ...

Embodiment

[0029]A crude butadiene stream is produced by an oxidative dehydrogenation process. The crude stream composition is shown in Table 1 as mass % and the feed rate was 15,000 kg / hr. The 2-butene column produces an overhead stream comprising 1,3-butadiene and 1-n-butene.

[0030] Table 1 - 2-Butene Column Separation of Crude Butadiene Process Stream

[0031]

[0032] The examples show the single stage separation of butadiene and 1-butene from other components. The table also shows two alternatives: the composition of the bottoms stream as a single bottoms stream, or an optional side draw stream where the remainder of the bottoms stream contains oxygenates and heavy hydrocarbons. This example also shows an idealized separation for illustration, e.g. no C in the bottoms stream 4 . The actual bottoms stream contains enough other hydrocarbons, including C 4 For safe dilution of vinyl acetylene (VA).

[0033] The lower amount of vinyl acetylene (VA) demonstrates the advantage ...

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Abstract

A process is presented for the purification of 1,3 butadiene. The process is for treating a butadiene stream from an oxidative dehydrogenation unit, where a butane stream is dehydrogenated, generating a butadiene rich stream. The butadiene rich stream is fractionated and passed through a butadiene recovery unit. Additional C4 compounds recovered from the fractionation bottoms stream are further processed for increasing yields of butadiene.

Description

[0001] priority statement [0002] This application claims priority to US Application No. 13 / 852,534, filed March 28, 2013, the entire contents of which are incorporated herein by reference. field of invention [0003] The field of the invention relates to the dehydrogenation of hydrocarbons. In particular, the invention relates to the dehydrogenation of light hydrocarbons using oxidative dehydrogenation processes. Background of the invention [0004] Butadiene is an important monomer for the preparation of high molecular weight polymers. It is widely used in the production of tires and other products in the automotive industry. It is also widely used in the production of synthetic rubbers such as styrene-butadiene rubber, nitrile-butadiene rubber, and styrene-butadiene latex. Polymer grade butadiene requires high purity and needs to be substantially free of reactive chemicals such as acetylene, carbonyls, and contaminants such as sulfur and other heavy components. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/135C07C7/00C07C11/167
CPCC07C7/005C07C7/08C07C11/167
Inventor S·L·克鲁帕
Owner UOP LLC