Reforming protective agent and preparation method thereof

Abstract

The invention provides a reforming protective agent. Acidified pseudoboehmite and an acidified molecular sieve are taken as a common carrier under the synergistic effect, uniform dispersion of active ingredients such as manganese oxide and ferric oxide is promoted, the pore channel structure of the carrier can be optimized, the pore size, pore volume and specific surface area are increased, more vacant orbits and active centers are formed in the space structure of the carrier, the components further comprise catalyst wastes, and the mechanical strength of the carrier can be improved. Meanwhile, the vacant orbits and active centers in the structures of the acidified pseudoboehmite and an acidified molecular sieve can be coordinated with the catalyst wastes and active ingredients in the manganese oxide, the active center sites of the catalyst are improved, and the reaction is promoted. Therefore, according to the reforming protective agent disclosed by the invention, the mechanical strength is improved, and the protective agent has the advantages that the desulfurization reaction activity is high, the desulfurization efficiency is high, the service life of the catalyst is long, and side reactions can be effectively avoided.

Description

technical field [0001] The invention relates to a reforming protective agent and a preparation method thereof, belonging to the technical field of catalysts. Background technique [0002] Catalytic reforming technology is the main process for producing aromatics and high-octane gasoline components from naphtha, and the by-product hydrogen is an important source of hydrogen for hydrogenation units. Since the reforming catalyst is a noble metal catalyst, higher requirements are put forward for the feed naphtha, that is, the content of sulfur and nitrogen is less than 0.5 μg / g, and the content of arsenic is less than 1 μg / g. Especially in recent years, when the reforming catalyst has transitioned from a single-metal component to a multi-metal component, and the platinum content has been greatly reduced, the reforming catalyst has stricter requirements on the impurity content of refined naphtha. [0003] Reforming protection means that under the action of hydrogen and reforming...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the active components such as CuO, NiO, ZnO in the structure of the prior art reforming protective agent are distributed unevenly, the pore diameter and specific surface area of ​​the catalyst are small, the pores are easily blocked, the mechanical strength is low, and the desulfurization The reaction activity is low, the desulfurization efficiency is low, and the service life of the catalyst is short, thereby providing a reforming protective agent with a long service life and high desulfurization efficiency and its preparation method