Catalyst for preparing gasoline by coupling methanol with naphtha and preparation method thereof

Abstract

The invention relates to the technical field of catalysts, in particular, to a catalyst for preparing gasoline by coupling methanol with naphtha and a preparation method thereof. The catalyst includes component A, component B and component C; the component A includes metal-modified small-grain HZSM-5 molecular sieves; the component B includes metal-modified HZSM-5 molecular sieves, HZSM-22 molecular sieves, HZSM-35 molecular sieves, Hβ zeolite molecular sieves, and H-type mordenite molecular sieves. or more; the component C includes a metal composite oxide. The catalyst of the present invention has the functions of light hydrocarbon aromatization and methanol alkylation, greatly reducing the content of durene; and the catalyst of the present invention has the function of isomerization, which effectively improves the octane number of gasoline; and the catalyst of the present invention has desulfurization The function can effectively reduce the sulfur content in gasoline, so that the sulfur content in the obtained product is lower than 10ppm, which meets the national V standard.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a catalyst for preparing gasoline by coupling naphtha with methanol and a preparation method thereof. Background technique [0002] The technology of producing high-octane gasoline by naphtha aromatization has related technologies at home and abroad. The typical one is the technology of producing high-octane gasoline from Luqi straight-run gasoline. This technology was put into operation in Poland in 1997 with 40,000 tons / year Industrial device, the technology is to convert naphtha into high-octane gasoline in a fixed-bed reactor using a highly active molecular sieve aromatization catalyst developed by the Catalyst Institute of the Siberian Branch of the Russian Academy of Sciences. [0003] The methanol-to-gasoline technology was first published by Mobil in 1976. The MTG process was developed on the basis of converting methanol into aromatics on a ZSM-5 molecular sieve catalys...

AI Technical Summary

Problems solved by technology

[0005] However, the current technology of naphtha aromatization to produce high-octane gasoline has the problem of high benzene content, and with the increasingly stringent environmental protection regulations, the problem of excessive sulfur content in naphtha aromatization gasoline has become prominent; while methanol to gasoline The gasoline produced by the technology has a lot of heavy components, especially the high content of durene in gasoline. The gasoline produced by the two technologies needs to be blended or post-treated before leaving the factory. Therefore, a catalyst is developed to couple the reactions of naphtha and methanol , and at the same time solve the problem of high benzene, sulfur content and durene content in naphtha aromatization process, it is very necessary

Images