Gasoline desulfuration and deodorization process

Abstract

The invention provides a gasoline desulfuration and deodorization process, which adopts a fiber liquid film mass transfer mode and a fixed bed reactor series connection mode to conduct gasoline desulfuration and deodorization purification. Gasoline is firstly contacted with alkali liquor in a fiber liquid film device, hydrogen sulfide and a large part of mercaptan in the gasoline are extracted to enter the alkali liquor and then are sent to a fixed bed reactor; under effects of oxidation air and activating agents, remained mercaptan is oxidized to be corresponding disulphide; and finally the gasoline desulfuration and deodorization purification is achieved. The gasoline desulfuration and deodorization process can not only improve efficiency of gasoline alkali wash in advance, but also achieve the purpose of effectively reducing equipment investment of a fixed bed, reducing use amounts of catalytic agents and the activating agents, and effectively guaranteeing product sulphur contents to reach the standard and the like.

Description

Technical field [0001] The invention relates to a gasoline purification treatment method, in particular to a gasoline desulfurization and deodorization process. Background technique [0002] The gasoline fixed-bed alkali-free deodorization technology dissolves a small amount of activator in the oil phase, so that the catalytic oxidation of the mercaptans is carried out in a single oil phase, avoiding the phase transfer process, so the Thiol has a higher removal rate (refer to Chinese Patent 8510378). [0003] But in the actual application process, in order to remove a small amount of H in gasoline 2 S and other acidic substances (such as phenol, naphthenic acid, etc.) can avoid problems such as unqualified corrosion of the product copper sheet and shortened catalyst life. The alkali-free deodorization process usually requires a gasoline pre-alkaline washing treatment device. [0004] At present, gasoline pre-alkali washing methods mainly include solid alkaline pre-alkali washing and...

AI Technical Summary

Problems solved by technology

However, its pre-alkali washing equipment currently generally uses a mixing tank (device) with low mass transfer efficiency, so there are problems such as insufficient mass transfer efficiency, large alkali consumption and waste alkali discharge.

[0006] In addition, since the gasoline fixed-bed non-alkali deodorization technology requires continuous addition of activators and periodic replacement of bed catalysts, it has problems such as high operating costs, limited long-term operation of the device, and high production costs.

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