Etherification method combined with catalytic cracking absorption stable system

Abstract

The invention provides a hydrocarbon etherification method which is combined with a catalytic cracking absorbing stabilizing system; after being mixed with the chosen fatty alcohol, the hydrocarbon etherification raw materials are sent into a pre-etherification reactor, and reacts with a pre-etherification catalyst in a contact way; without separation, the reaction products are directly put into catalytic cracking stabilizer after being mixed with the chosen fatty alcohol; during the reaction period in the catalytic cracking stabilizer, the reaction products react in contact with the etherification catalyst for fractionation, separated liquefied gas can be obtained from the top of the stabilizer, while stabilized gasoline containing ether compound is obtained from the bottom of the stabilizer. The method fully makes use of the mass transfer and heat transfer conditions of the catalytic cracking stabilizing system, which does not only reduce the energy and material consumption, but also obtains the stabilized gasoline with low content of olefin, high octane value and qualified vapor pressure; the method has great suitability towards the characteristic that domestic catalytic gasoline has high content of olefin, which can provide more operating flexibility for refineries to produce gasoline of high index.

Description

technical field

[0001] The invention relates to a method for the etherification reaction of hydrocarbon raw materials and fatty alcohols in a catalytic cracking stabilization tower under the catalysis of an etherification catalyst. Background technique

[0002] In recent years, with the increasingly stringent environmental protection regulations, countries and regions around the world have increasingly strict restrictions on the content of olefins in gasoline, and the market's demand for high-grade gasoline has also increased with the development of the automobile market. Since January 2003, my country has implemented the national standard (GB 17930-1999) of "Unleaded Gasoline for Vehicles" nationwide. This standard limits the olefin content to no more than 35% by volume. It is expected that this limit will be further reduced in the future. Nearly 80% of the gasoline in my country comes from the catalytic cracking process, and the remaining gasoline has few components and po...

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