Benzene hydroxylation catalyst stability by acid treatment

Details Benzene hydroxylation catalyst stability by acid treatment Benzene hydroxylation catalyst stability by acid treatment

1996-08-20

1999-02-23

Shippen, Michael L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

502 34, 502 35, 502 71, 568705, 568714, 568715, 568716, 568724, C07C 3700

Patent

active

058746471

ABSTRACT:
A zeolite catalyst for hydroxylating benzene to phenol is treated hydrothermally with a gas comprising approximately 1-100 mole percent water at a temperature between approximately 350.degree.-950.degree. C., and subsequently is treated with an acid. This treatment selectively removes aluminum species from the zeolite catalyst in a manner that increases catalyst stability in phenol production without reducing the activity of the catalyst.

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