Catalytic cracking with reduced emission of noxious gases

Details Catalytic cracking with reduced emission of noxious gases Catalytic cracking with reduced emission of noxious gases

1979-03-19

1980-09-09

Dees, Carl F.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

B01J 2904

Patent

active

042216770

ABSTRACT:
A cyclic, fluidized catalytic cracking process providing reduced emissions of noxious effluents in regeneration zone flue gases is operated with homogeneous or non-homogeneous, regenerable, fluidized, solid particles which are circulated throughout the catalytic cracking process cycle and which comprise (1) a molecular sieve-type cracking catalyst, comprising a cracking catalyst matrix containing crystalline aluminosilicate distributed throughout said matrix and (2) a metallic reactant which reacts with a sulfur oxide to form a metal- and sulfur-containing compound in the solid particles. The method involves regeneration of the cracking catalyst in the presence of a metallic oxidation promoter which can also be a component of the solid particles.

REFERENCES:
patent: 4072600 (1978-02-01), Schwartz
patent: 4093535 (1978-06-01), Schwartz
Selection of Metal Oxides for Removing SO.sub.2 From Flue Gas, Lowell et al., Ind. Eng. Chem. Process Des. Develop., vol. 10, No. 3, pp. 384-390 (1971).
Reactivity of SO.sub.2 With Supported Metal Oxide-Alumina Sorbents, R. F. Vogel et al, Environmental Science & Technology, vol. 8, No. 5, pp. 432-436.

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