Method for preparing wet catalytic oxidation catalyst by using waste catalytic cracking catalyst

Abstract

The invention discloses a method for preparing a wet catalytic oxidation catalyst by using a waste catalytic cracking catalyst. The method comprises the following steps: (1) adding a titanium-containing solution into the waste catalytic cracking catalyst, performing treatment and filtering to obtain a liquid-phase material A and a solid-phase material; (2) adding a manganese source into the liquid-phase material A in the step (1) to obtain a liquid-phase material B; (3) combining the liquid-phase material B obtained in the step (2) and a precipitant, adding into the solid-phase material obtained in the step (1) and performing ageing treatment; (4) kneading and forming the aged material obtained in the step (3), activated carbon, kaolin and adhesive, drying and roasting to prepare the wet catalytic oxidation catalyst. According to the method, the waste catalytic cracking catalyst is changed from waste to treasure; furthermore, the waste catalytic cracking catalyst is low in preparationcost and high in performance.

Description

Technical field [0001] The invention relates to the field of wastewater treatment and catalyst preparation, in particular to a method for preparing a wet catalytic oxidation catalyst by using a waste catalytic cracking catalyst. Background technique [0002] Catalytic cracking is one of the heavy oil light-weight processing processes commonly used in refineries, and it is also the secondary processing technology with the largest amount of catalyst in the refining industry. With the heavy and degraded crude oil quality in the world, as well as the increasing demand for clean oil products and stricter environmental protection requirements, the replacement rate of catalytic cracking catalysts has increased, and waste catalysts caused by heavy metal deposition, coking, etc. The amount of cracking catalyst is increasing day by day. At present, underground burial is usually used for disposal, which not only seriously pollutes the atmosphere, soil and water resources, but also causes w...

AI Technical Summary

Problems solved by technology

During the catalytic cracking process, most of the heavy metals such as Ni, V, and Ca in the raw material are deposited on the catalyst, and the carbonaceous substances generated during the catalytic cracking reaction will also deposit on the surface of the catalyst, covering the active center or active center of the catalyst. Poisoning will eventually cause the catalyst to lose its activity and the regeneration cannot meet the requirements of use, becoming a spent catalyst

[0004] In the prior art, different methods are used to restore the activity of the spent catalytic cracking catalyst, but its effect is not good. For example, CN104801353A, CN104841495A, CN104815704A etc. adopt methods such as reacting with silicon tetrachloride to restore the activity of the catalyst, but the heavy metal removal rate is relatively high. low, so that catalyst activity recovery is limited