A method for regeneration of spent hydrogenation catalyst

Abstract

FIELD: chemical industry.SUBSTANCE: composite substrate for a hydrogenation catalyst containing a semi-coke porous dilator material, a molecular sieve, and a catalytic cracking catalyst has been proposed. Mass ratio of semi-coke pore expanding material to the molecular sieve and to the spent catalytic cracking catalyst is (from 1 to 5):( from 2 to 4):( from 0.5 to 5); semi-coke pore expanding material has a specific surface area from 150 to 300 m / g and average pore size from 70 to 80 nm; molecular sieve has a specific surface area from 200 to 300 m / g and average pore size from 5 to 10 nm; and the spent catalytic cracking catalyst has a specific surface area from 50 to 300 m / g and average pore size from 3 to 7 nm. Method for producing a composite substrate for a hydrogenation catalyst, a hydrogenation catalyst, and a method for regenerating spent hydrogenation catalyst are also provided.EFFECT: technical result is the achievement of uniformity of pores and the provision of a composite substrate, which contains a uniform distribution of a multi-dimensional pore used with a hydrogenation catalyst by grinding.21 cl, 24 ex, 3 tbl

Description

technical field [0001] The invention belongs to the technical field of recovery of spent catalysts, in particular to a method for regenerating a spent hydrogenation catalyst, in particular to a method for regenerating a suspended bed spent hydrogenation composite catalyst. Background technique [0002] There are many kinds of suspension bed hydrogenation catalysts, and with the improvement of the performance requirements of hydrogenation catalysts, suspension bed hydrogenation composite catalysts have been widely used. The hydrogenation composite catalyst has the properties of hydrodesulfurization, hydrocracking, hydrodenitrogenation and the like. Commonly used suspension bed hydrogenation composite catalysts include molybdenum-cobalt-alumina system, molybdenum-cobalt-nickel-alumina system, etc., through catalytic hydrogenation of heavy oil raw materials such as heavy oil, residual oil, high-temperature coal tar, etc., to make heavy Lightening of high-quality oil raw materi...

AI Technical Summary

Problems solved by technology

But, there are following problems in this flow process: 1) valuable metal recovery such as molybdenum, nickel is incomplete, and recovery rate is low; environment; 3) The sulfur of metal sulfides is oxidized during incineration and oxidative roasting, and converted into sulfur dioxide to pollute the environment; 4) The treated waste residue still contains heavy metal salts, and long-term stacking and treatment may cause secondary pollution

[0007] However, after analysis, it is found that the technical solutions disclosed in the above patent documents have the following defects: 1) the carrier and active components are not effectively compounded and utilized during the recovery and treatment of spent hydrogenation catalysts; 2) metal impurities are removed by acid washing, but some metal impurities It can be used as an active metal in the subsequent hydrogenation process, resulting in ineffective use of these metal impurities; 3) by dry distillation, part of the coke material is obtained through dry distillation reaction to obtain liquid hydrocarbons, but the remaining coke material is not effectively used; and then the carbon deposit is removed by roasting, Carbon deposits are not utilized

Images