A method of producing clean gasoline

Abstract

A method for producing clean gasoline, comprising: (1) In a refining reactor, under the condition of the presence of hydrogen, gasoline raw materials are contacted with an adsorption desulfurization catalyst to adsorb and remove sulfur compounds in gasoline, and at the same time selectively hydrogenate reaction to remove sulfur compounds. Removal of diolefins in gasoline; (2) The gasoline refined in step (1) is introduced into the etherification reactor, and in the presence of a solid strong acid catalyst, at a temperature greater than 95°C, the olefins in gasoline react with alcohols to form Ether to obtain an etherified gasoline product, the solid strong acid catalyst is a high temperature resistant strong acid catalyst with a heat resistance temperature of 125°C-250°C and an acid center strength greater than H0=-8. The method provided by the invention removes sulfur and dienes in gasoline, greatly increases the content of etherified products in gasoline products, and can obtain clean gasoline products with high octane number.

Description

technical field [0001] The present invention relates to a method for refining gasoline, more specifically, relates to a method for refining and etherifying gasoline to produce clean gasoline products. technical background [0002] In recent years, with the increasingly stringent environmental protection regulations, the restrictions on olefin content and sulfur content in gasoline have become increasingly stringent in countries and regions around the world, and the market demand for high-grade gasoline has also increased with the development of the automobile market. From July 1, 2010, my country will gradually implement the National IV emission standard nationwide. The standard requires that the sulfur content in gasoline is not more than 50 μg / g, and the olefin content is not more than 25v%. Nearly 80% of gasoline in my country comes from catalytic cracking process, and the remaining gasoline has few components and poor blending ability. However, the content of olefins in ...

AI Technical Summary

Problems solved by technology

The disadvantage is that the etherification raw material has not been pretreated, and the catalyst deactivates quickly, so it needs to be continuously sent to the catalytic cracking reaction regeneration system for regeneration. The disadvantage is that there is no methanol separation system, so methanol cannot be added in excess, resulting in the maximum conversion of olefins.

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