Preparation method of sulfurized gasoline hydro-upgrading catalyst

Abstract

The invention relates to a method for preparing a vulcanization type gasoline hydrogenation upgrading catalyst. Gasoline hydrogenation catalysts are treated by vulcanizing agents with multiple sulfur ions and organic nitride which is used as a passivator at the low temperatures, active components in the gasoline hydrogenation catalysts comprise a type or a plurality of types of Mo and W of VI B groups and Co and Ni of VIII B groups, and stabilizers comprise a type or a plurality of types of Zn and Cd of II B groups, Na and K of I A groups and rare earth metal La and Ce. The method has the advantages that cascade full vulcanization can be carried out on metal oxide or precursors of the metal oxide, and strong acidic sites in ZSM-5 molecular sieve composite carriers can be selectively passivated; the vulcanization type gasoline hydrogenation upgrading catalyst prepared by the aid of the method is short in on-stream time, high in hydrogenation and olefin reduction upgrading activity, selectivity, carbon deposition resistance and liquid yield and low in octane number loss, and accordingly the method and the vulcanization type gasoline hydrogenation upgrading catalyst are particularly applicable to producing clean gasoline components from inferiorly catalytically cracked gasoline by means of hydrogenation and olefin reduction upgrading at a low cost.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a preparation method of a sulfurized gasoline hydrogenation upgrading catalyst. Background technique [0002] At present, the smog is becoming more and more serious, and the environmental pollution caused by vehicle exhaust emissions has become a major problem that must be solved for the sustainable development of the national economy and society. For this reason, the standards for vehicle fuel in various countries in the world are becoming increasingly stringent. In recent years, my country's gasoline quality upgrade has progressed rapidly. On January 1, 2017, the national implementation of the sulfur content less than 10μg·g -1 National V standard. Recently, my country has introduced more stringent National VI standards, which are scheduled to be implemented on January 1, 2019. The National VI standard stipulates that the olefin content of gasoline will be redu...

AI Technical Summary

Problems solved by technology

This kind of internal vulcanization method has been widely used in industry for a long time, but this method usually has the following disadvantages: (1) special pre-sulfurization equipment needs to be set up on the hydrogenation unit, thereby increasing the investment cost of the unit; (2) The vulcanizing agent added during the vulcanization process and the water and high-concentration hydrogen sulfide generated by the reaction can easily cause corrosion of the high-pressure reactor and related equipment and pipelines, resulting in equipment damage and potential safety hazards; (3) The vulcanization process is long, making the start-up period Longer; (4) The vulcanizing agent used is flammable and toxic, and it is easy to pollute the environment during the vulcanization process; (5) The cost of pre-vulcanization in the device is relatively high

In addition, the existing external presulfurization technologies at home and abroad inevitably have disadvantages such as cumbersome vulcanization process, sulfur loss, and heat release concentration, which increase the preparation and operation costs of the catalyst.

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