Preparation method of solid-supported low-carbon hydrocarbon alkali-free deodorization catalyst

By using a supported catalyst with microporous molecular sieves as a carrier in the deodorization process of low-carbon hydrocarbons, and combining cobalt phthalocyanine with molecular sieves, the problems of alkaline residue discharge and catalyst deactivation were solved, achieving efficient and stable mercaptan removal and reducing operating costs.

CN119158623BActive Publication Date: 2026-05-05CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Application Number
CN202310721592.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-06-19
Publication Date
2026-05-05
Estimated Expiration
2043-06-19

AI Technical Summary

Technical Problem

Existing deodorization processes for low-carbon hydrocarbons face challenges such as alkaline residue emissions and the tendency of cobalt phthalocyanine catalysts to aggregate and deactivate, leading to environmental problems and high operating costs.

Method used

Using microporous molecular sieves as a carrier, cobalt phthalocyanine is combined with molecular sieves through mixed solution impregnation, ion exchange and in-situ synthesis to form a stable supported low-carbon hydrocarbon alkali-free deodorization catalyst, avoiding the shedding and deactivation of active components.

Benefits of technology

This method enables efficient removal of thiols from low-carbon hydrocarbons under alkali-free conditions, improving catalyst stability and lifespan while reducing operating costs.

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Abstract

This invention discloses a method for preparing a supported low-carbon hydrocarbon deodorization catalyst. The method includes: (1) preparing a catalyst containing M... 2+ and M' 3+ (1) Add molecular sieve to the solution and stir evenly; (2) React the obtained suspension with a mixed solution of NaOH and Na2CO3 or a weak alkaline solution under stirring; (3) Obtain the composite carrier by drying and calcination; (4) Prepare a cobalt salt solution and transfer Co to the cobalt salt solution by ion exchange. 2+ (5) After filtration and drying, Co molecular sieve solid alkali is obtained; (6) Co molecular sieve solid alkali, ammonium phthalate sulfonate, urea, ammonium molybdate, and phthalic anhydride are added in proportion and ground evenly; (7) The obtained material is heated under an inert atmosphere to react and obtain the catalyst product. In the catalyst prepared by this invention, sulfonated cobalt phthalocyanine is combined with molecular sieve through chemical bonds, the active component has a stronger binding force and a longer service life.
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