Hydrothermally stable microporous molecular sieve catalyst...

Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Phosphorus or compound containing same

Reexamination Certificate

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Details

C502S214000, C502S060000, C502S077000, C502S078000, C502S079000

Reexamination Certificate

active

07488700

ABSTRACT:
Disclosed are a hydrothermally stable porous molecular sieve catalyst and a preparation method thereof. The catalyst consists of a product obtained by the evaporation of water from a raw material mixture comprising a molecular sieve having a framework of Si—OH—Al—, a water-insoluble metal salt and a phosphate compound. The catalyst maintains its physical and chemical stabilities even in an atmosphere of high temperature and humidity. Accordingly, the catalyst shows excellent catalytic activity even when it is used in a severe process environment of high temperature and humidity in heterogeneous catalytic reactions, such as various oxidation/reduction reactions, including catalytic cracking reactions, isomerization reactions, alkylation reactions and esterification reactions.

REFERENCES:
patent: 3911041 (1975-10-01), Kaeding et al.
patent: 4677122 (1987-06-01), Horwell et al.
patent: 6211104 (2001-04-01), Shi et al.
patent: 6835863 (2004-12-01), Chester et al.
patent: 6867341 (2005-03-01), Abrevaya et al.
patent: 2003/0027713 (2003-02-01), O'Connor et al.

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