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Advanced alkane purifying method for removing impurities

A technology for deep purification and alkanes, applied in chemical instruments and methods, purification/separation of hydrocarbons, organic chemistry, etc., can solve problems such as desulfurization and deoxygenation that are not mentioned, and reduce unit consumption and reduce Effects of energy consumption and productivity improvement

Active Publication Date: 2015-03-11
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Mentioned in CN101249366A that adopts refinery carbon four-component refined desulfurization method, but did not mention the problem of deoxidation
CN103418164A discloses a method for removing water, methanol and dimethyl ether in hydrocarbons, but does not mention the problem of desulfurization

Method used

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  • Advanced alkane purifying method for removing impurities
  • Advanced alkane purifying method for removing impurities
  • Advanced alkane purifying method for removing impurities

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Embodiment Construction

[0041] In order to have a clearer understanding of the technical features, purposes and beneficial effects of the present invention, the technical solution of the present invention is described in detail below, but it should not be construed as limiting the scope of implementation of the present invention.

[0042] The alkane to be purified in the present invention includes C produced by FCC 3 -C 5 Fractions, which contain sulfides (including H 2 S, COS, mercaptans and disulfides, etc.) and a small amount of sulfur-free polar compounds (including methanol, dimethyl ether, acetone, etc.), such as figure 1 As shown, the deep purification method of alkane impurities of the present invention may comprise the following steps:

[0043] (1) Make the alkane flow to be purified enter the alkali cleaning treatment unit 1 through the pipeline, and in the alkali cleaning treatment unit 1, the alkane flow to be purified and the alkali solution are at a temperature of 15° C.-66° C. at a t...

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Abstract

The invention provides an advanced alkane purifying method for removing impurities. The method comprises the following steps: 1, alkane to be purified contacts with an alkali solution; 2, the alkane contacts with a copper adsorbent; and 3, the alkane contacts with an adsorbent for selectively adsorbing polar compounds to obtain advanced purified alkane. The advanced alkane purifying method for removing impurities can be used for advanced purification of a C3-C5 alkane fraction generated through FCC; and an alkali washing processing unit, a fine desulphurization unit and a polar compound adsorption unit are used to remove hydrogen sulfide, mercaptan, carbon oxysulfide and other sulfides, and a small content of methanol, dimethyl ether and / or acetone and other impurities, so the C3-C5 alkane fraction generated through the FCC is suitable for being converted to propylene, isobutene or pentene, so the output of olefins is improved, the life of an alkane dehydrogenation catalyst is prolonged, the unit consumption is reduced, the economic benefit is improved, and the operation of a downstream dehydrogenation method is improved.

Description

technical field [0001] The invention relates to a method for deep purification of alkane impurities, in particular to a saturated hydrocarbon (C 3 -C 5 ) in hydrogen sulfide and other sulfides, a deep purification method for impurities such as methanol, dimethyl ether and / or acetone with a small content, and belongs to the technical field of petroleum refining. Background technique [0002] The function of the FCC operation unit is to convert atmospheric gas oil, vacuum gas oil, atmospheric residue, vacuum residue and heavy oil feedstock from other devices into high-octane gasoline, light fuel oil and rich oil. Petroleum liquefied gas of olefins. The processing capacity of the FCC unit in a refinery accounts for 30-50% of the total crude oil processing capacity of the whole plant. Early refinery FCC units were designed to handle refinery vacuum gas oil, which was derived from high-quality crude oil. At this stage, the raw materials of FCC units are heavier and of poorer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C9/08C07C9/10C07C9/18C07C9/15C07C9/12C07C7/00C07C7/13
CPCY02P20/584
Inventor 周广林王晓胜周红军
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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