Method for decreasing by gasoline olefin and producing propylene

Abstract

This invention published a method of catalyzing petrol to reduce olefin hydrocarbon and produce propene. The raw material of this method is from catalyzing petrol or light petrol, it is mixed with water, and then the mixture reacted with high silal zeolite in the fixed bed catalytic reactor, after cooling isolation, we can get propene, ethane and modified petrol. The composition of the zeolite catalyst that mentioned before is that 50% silica-rich zeolite (Sil\Al mol tatio is 50-300), 20-70% monox, 5-20% inorganic oxide. Using this method, not only can reduce the content of olefinic hydrocarbon in the catalytic petrol, and the octane level of the modified petroldoes not change, but also we can get the ethane and propane in the same time. It shows a very impotant industrialization way that we can possibly reduce the olefinic hydrocarbon contant of petrol.

Description

Technical field [0001] The present invention relates to a method for reducing the content of olefins in gasoline. Specifically, the present invention relates to a method for catalytically converting olefins in catalytic gasoline to obtain upgraded gasoline with reduced olefins and substantially unchanged octane number. Background technique [0002] With the rapid development of the automobile industry, the problem of automobile exhaust pollution has attracted more and more attention. Various countries have made strict regulations on the quality of vehicle gasoline and exhaust emissions. The European Standard III requires olefin content (volume fraction) ≤ 18%, the basic requirement of the United States for olefin content is ≤ 10.8%, and California of the United States requires olefin content of ≤ 6.0%. my country promulgated the clean gasoline standard in 1999, and put forward strict requirements on the content of olefins, aromatics, benzene and sulfur in gasoline, where the cont...

AI Technical Summary

Problems solved by technology

However, at present, most domestic oil refining enterprises either lack the means of hydrofining, or the treatment capacity of hydrofining is insufficient or the hydrogen source is lacking.

Therefore, it is unrealistic to improve the quality of FCC gasoline, which accounts for 90% of commercial gasoline, through hydrofining, and hydrofining will also bring about the loss of gasoline octane number.

[0006] Methods such as light gasoline etherification, aromatization, alkylation, and superimposition can reduce the olefin content in catalytic gasoline. Some of these methods and technologies are complicated in process and large in investment, and it is still very difficult for small refineries to adopt them. Some processes The technology is immature, and there is still a long way to go before industrialization

[0007] To sum up, in the prior art, the process of producing gasoline from catalytic cracking, catalysts and additives are improved to reduce the content of olefins in gasoline, and the reduction range is limited, which cannot meet the requirements of the new gasoline standard; From the perspective of the methods and processes for processing reduced olefins, some of the methods such as hydrogenation, etherification, aromatization, and superimposition are complex in process, large in investment, and some are immature in technology

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