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Method for separating butane and butylenes, and dedicated installation

A technology of butene and butane, which is applied in the field of carbon four-component extraction and rectification separation of butane and butene in oil refineries, a method for separating butane and butene and its special equipment, which can solve the problem of butane and butane Solve the problems of low olefin yield and low purity, and achieve the effect of improving yield and purity, improving purity, and reducing foaming

Inactive Publication Date: 2007-10-10
CHINA PETROLEUM ENG CORP LTD
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Problems solved by technology

[0008] The present invention provides a method for separating butane and butene from carbon four components and its special device, which overcomes the above-mentioned deficiencies in the prior art, and solves the problem of low yield and low yield of separated butane and butene. The problem of low purity

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  • Method for separating butane and butylenes, and dedicated installation

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Embodiment Construction

[0041] The present invention is not limited by the following examples, and the specific implementation manner can be determined according to the above-mentioned technical solutions and actual conditions of the present invention. Percentages in the present invention generally refer to percentages by weight.

[0042] Below in conjunction with preferred embodiment the present invention is further discussed:

[0043] The best embodiment uses the carbon four components of the refinery as the raw material, from which high-purity butene products are separated, and high-purity butane products can also be obtained.

[0044] The specific structure of the special device for separating butane and butene products from the carbon four-component raw material is as follows: As shown in Figure 1, the special device includes a common raw material pretreatment rectification tower a, a heavy component extractive rectification tower b. Light and heavy component extractive distillation tower c and...

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Abstract

This invention discloses method and apparatus for separating butane and butylene. The method comprises: (1) pretreating the raw materials; (2) extraction-rectifying the heavy fractions separated from step 1; (3) extraction-rectifying the light-heavy fractions separated from step 1; (4) separating the heavy fractions and the extractant in a degasification column. The apparatus comprises a raw material pretreatment rectification column, a heavy fraction extraction rectification column, a light-heavy fraction extraction rectification column, and a degasification column. The method can effectively increase the yields and purities of the fractions separated from C4 raw materials, lower the consumption of the extractant, and effectively reduce the foaming in the extraction rectification columns. Besides, the operation is stable. When used to separate butane and butylene from C4 raw materials in oil refinery plant, the method can realize high yield and purity of butylene product, low consumption of the extractant, and high purity of butane product.

Description

technical field [0001] The present invention relates to the technical field of extraction and rectification method and special device for separating butane and butene from carbon four-component raw material. Four-component extraction and rectification to separate butane and butene. Background technique [0002] Common C4 feedstock components in refineries include (sorted from low to high boiling point): isobutane, isobutene, butene-1, 1,3-butadiene, n-butane, trans-2-butene, cis 2-butene, butene products generally contain isobutene, butene-1, 1,3-butadiene, trans-2-butene, cis-2-butene components, butane products generally contain isobutane, n-butane component. Common refinery C4 feedstock components are C4 feedstocks containing a very small amount of 1,3-butadiene and trace impurities. [0003] Authorized announcement number is that the Chinese patent document of CN1170793C discloses a kind of " the method for separating butane and butene with the mixed solvent of methyl...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/08C07C7/04C07C11/08C07C9/10
Inventor 宋清山陈科宋光武耿振坤李忠王晓刚方胜生刘勇史维松张国伟
Owner CHINA PETROLEUM ENG CORP LTD
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