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Device and method for preparing isobutene through hydrogenation and isomerization

A technology of isomerization and isobutane, which is applied in the direction of isomerization hydrocarbon production, hydrogenation hydrocarbon production, chemical instruments and methods, etc., can solve the problems of n-butane surplus and isobutane deficiency, etc., and achieve the goal of improving economic benefits Effect

Inactive Publication Date: 2017-10-31
SINOPEC ENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the problems of a large surplus of low-value n-butane and a shortage of high-value-added isobutane in the prior art, the present invention provides a device and method for preparing isobutane

Method used

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  • Device and method for preparing isobutene through hydrogenation and isomerization
  • Device and method for preparing isobutene through hydrogenation and isomerization
  • Device and method for preparing isobutene through hydrogenation and isomerization

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Embodiment Construction

[0079] Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0080] use as figure 1 The combination shown produces isobutane.

[0081] The device includes: a pre-delightening tower 1, a first-stage hydrogenation reactor 33, a first-stage hydrogenation separation device, a first-stage hydrogenation circulation pump 37, a first-stage circulating cooler 38, a second-stage hydrogenation reactor 4, and heat exchange for hydrogenation inlet and outlet Device 5, second-stage hydrogenation feed heater 6, second-stage hydrogenation separation device, light removal tower 14, isobutane product tower 17, isomerization inlet and outlet heat exchanger 20, isomerization feed heater 21 and isomerization reactor 22; wherein,

[0082] The C4 feed pipeline is connected to the pre-light removal tower 1, and the bottom of the pre-light removal tower 1 is connected to the first-stage hydrogenation reactor 33, the first-s...

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Abstract

The invention discloses a device and method for preparing isobutene through hydrogenation and isomerization. The device comprises a light fraction pre-removal tower, a primary hydrogenation reactor, a primary hydrogenation separation device, a primary hydrogenation circulating pump, a primary circulating cooler, a hydrogenation feeding / discharging heat exchanger, a secondary hydrogenation reactor, a secondary hydrogenation feeding heater, a secondary hydrogenation separation device, a light fraction removal tower, an isobutane finished product tower, an isomerization feeding / discharging heat exchanger, an isomerization feeding heater and an isomerization reactor. The method comprises the steps of enabling a C4 raw material to enter into the device through a C4 feeding pipeline; preparing isobutene and normal butane after light fraction pre-removal, hydrogenation and separation; and preparing the isobutene after isomerization reaction and separation of the normal butane. All C4-enriched light dydrocarbon can be treated, and meanwhile, the waste heat is recovered, so that the economic benefit of the device is improved.

Description

technical field [0001] The invention relates to the field of C4 light hydrocarbons, and more particularly, relates to a device and method for preparing isobutane through hydrogenation and isomerization. Background technique [0002] With the continuous deepening of petrochemical processing depth, the C 4 The rational utilization of each component in the distillate has been paid more and more attention. C 4 The 1,3-butadiene contained in the distillate can be separated by extractive distillation for the production of synthetic rubber, C 4 The isobutene in the fraction reacts with methanol through an etherification unit to generate MTBE and can obtain high-purity 1-butene through further precise fractionation, and the utilization of other carbon four components is less. Isobutane can produce methyl methacrylate, isobutene, isobutanol, propylene oxide, etc. In recent years, as the demand for isobutene, isobutanol and propylene oxide has increased year by year, the utilizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C5/03C07C5/27C07C7/04C07C7/00C07C9/12C07C9/10
CPCC07C5/03C07C5/27C07C7/00C07C7/04C07C9/10C07C9/12Y02P20/10
Inventor 马立国杨照高耸王鑫泉
Owner SINOPEC ENG
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