Regeneration method of molecular sieve catalyst

Abstract

The invention discloses a regeneration method of a molecular sieve catalyst, which comprises the following steps: placing an inactivated molecular sieve catalyst in a regeneration device, introducing oxygen-containing gas, and synchronously vacuumizing and roasting to obtain a regenerated molecular sieve catalyst. According to the regeneration method, strong heat release caused by combustion is relieved, bed temperature runaway and local sintering of the catalyst in the regeneration process are reduced, and the internal structure of the molecular sieve catalyst can be well protected from being damaged.

Description

technical field [0001] The application relates to a regeneration method of a molecular sieve catalyst, which belongs to the field of chemical catalysis. Background technique [0002] Molecular sieves have been widely used in petrochemical and fine chemical fields such as catalytic cracking and catalytic cracking due to their unique pore structure, strong acidity, and good shape-selective properties. However, under high temperature and high pressure reaction conditions for a long time, carbonaceous substances or other substances are deposited in the pores of the catalyst, resulting in a reduction in pore size (or pore opening), so that the reactant molecules cannot diffuse into the pores, and gradually lead to the gradual loss of pores. Blockage, so that the active sites of the catalyst will be lost in large quantities, the properties of the pores will be reduced, the active components will be embedded by the carrier, and the active components will be lost due to the generati...

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Problems solved by technology

[0004] The purpose of this application is to provide a regeneration method for molecular sieve catalysts, which solves the internal structure damage of the catalyst caused by the overheating of the bed layer caused by excessive local heat in the process of removing carbon deposits during the high-temperature calcination of the molecular sieve catalyst.

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