Method for cracking hydrocarbon oil

Abstract

This method aims at cracking hydrocarbon oil, under cracking condition, raw material hydrocarbon oil contactes with catalyst, which is already contacted with reducing gas atmosphere. Then proceeded are procedures of: separating cracking produced from catalyst, regenerating catalyst, said catalyst being contacted with reducing gas atmosphere. In above-said procedures, the catalyst is a mixture of cracking-aid agent and catalytic-cracking catalyst, wherein: said cracking-aid agent comprising a metal component and a carrier; the contact temp. for catalyst, contactint with reducing gas atmosphere being 100-900 deg.C, with contacting time being at least 1 second, the volume of reducing gas atmosphere is that: each ton of metal-contd. cracking catalyst, at one minute contact is not less than 0.03 m3 of reducing gas, the pressure in the reactor being 0.1-0.5 mega Pa.

Description

technical field

[0001] The invention relates to a hydrocarbon oil cracking method. Background technique

[0002] The cracking method of hydrocarbon oil usually includes in a cracking zone, under cracking conditions, the hydrocarbon oil is contacted with a cracking catalyst to react, the cracked product and the catalyst are separated, the catalyst is recycled to the regeneration zone for regeneration, and at least part of the regenerated catalyst is Circulating back to the cracking zone, the purpose of regenerating the catalyst is to maintain the cracking activity of the catalyst.

[0003] Some hydrocarbon oils contain impurities such as nickel, vanadium, iron, etc., and impurities such as nickel, vanadium, and iron in hydrocarbon oils are deposited on catalysts containing molecular sieves, which will lead to catalyst deactivation or affect the distribution of cracked products. To solve this problem, some hydrocarbon oil cracking methods add a reductio...

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