Method for preserving catalyst

Details Method for preserving catalyst Method for preserving catalyst

2008-09-02

2008-09-02

Lorengo, Jerry (Department: 1793)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Phosphorus or compound containing same

C502S211000, C502S212000, C502S213000, C502S214000, C502S215000, C502S300000, C502S313000, C502S317000, C502S319000, C502S325000, C568S470000

Reexamination Certificate

active

10542018

ABSTRACT:
The method for preserving a catalyst of the present invention is characterized in that, in a process for continuously producing an objective product by a vapor phase oxidation reaction using a phosphorus-molybdenum-vanadium catalyst containing phosphorus, molybdenum and vanadium, the phosphorus-molybdenum-vanadium catalyst retained in a reactor is maintained under a condition of a water content of 30 mg or less per 1 g of catalyst dry weight, before the start of the reaction or during the stop of the reaction. By this, deterioration of the catalyst retained in the reactor can be simply prevented.

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