Light hydrocarbon desulfurization method

A light hydrocarbon, flow direction technology, applied in the direction of processing hydrocarbon oil, hydrocarbon oil treatment products, refining with alkaline aqueous solution, etc., can solve problems such as alkali elution desulfurization failure
CN106978208AActive Publication Date: 2017-07-25CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2017-07-25

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Abstract

The present invention relates to the field of oil refining, and discloses light hydrocarbon desulfurization method, which is performed in a system containing an alkali washing unit, and comprises that an alkali liquid is introduced into a reactor shell side from the dispersed phase inlet of a two-phase mixing reactor, enters a mixing flow channel through distribution holes, and contacts a light hydrocarbon, wherein the light hydrocarbon is introduced into the mixing flow channel sequentially through a reactor inlet and a mixing flow channel inlet, and the flowing direction of the alkali liquid in the reactor shell side is opposite to the flowing direction of the alkali liquid in the mixing flow channel; and the mixture obtained after the contact of the alkali liquid and the light hydrocarbon is led out of the two-phase mixing reactor sequentially through a mixing flow channel outlet and a reactor outlet. According to the present invention, by using the two-phase mixing reactor, the sulfur-containing light hydrocarbon and the alkali liquid flow in the mixing flow channel at the high speed and are mixed vigorously, the mass transfer resistance is low, the acidic sulfur-containing substance in the sulfur-containing light hydrocarbon completely reacts with the alkali liquid, the deep desulfurization of the sulfur-containing light hydrocarbon is achieved, and the acidic sulfur-containing substance removal rate is more than 90%.
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Description

technical field

[0001] The invention relates to the field of oil refining, in particular to a method for desulfurizing light hydrocarbons. Background technique

[0002] Light hydrocarbons such as crude liquefied gas (mainly C4 hydrocarbons) and light gasoline (mainly C5 hydrocarbons) produced by refineries contain a large amount of acidic sulfur-containing substances (mainly hydrogen sulfide and mercaptans). method to remove acidic sulfur-containing substances.

[0003] Sweetening of mercaptans is an important step in the refining process of liquefied gas. The commonly used alkaline cleaning method for liquefied gas desulfurization in industry is to contact liquefied gas with lye containing excess NaOH, so that mercaptan and NaOH react to form sodium mercaptide, which is dissolved in lye to remove liquefied gas thiols in.

[0004] The lye containing sodium mercaptide needs to be regenerated to remove the contained sodium mercaptide. The method of lye regeneration is gene...

Claims

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