Honshu Chemical Industry Co., Ltd.

Shunji Yago

Fujihisa Matsunaga

Katsunori Takahashi

Mikio Kawahara

Yoshiharu Ayabe

Keiji Arimatsu

Takashi Kakiuchi

There is disclosed a catalyst for ortho-alkylation of phenols obtained by calcination of a catalyst precursor comprising a dry mixture of:

Catalyst for ortho-alkylation of phenols, a precursor thereof, and

The present invention is directed to a method for the preparation of p,p'-biphenol by simplified processes achieved by batch or continuous operations which comprises using phenol and isobutylene as starting materials, allowing phenol to react with isobutylene in the presence of aluminum phenoxide, oxidizing the resulting reaction liquid in the presence of an alkaline catalyst, and debutylating the reaction liquid in the presence of a debutylation catalyst.

Method for preparing p,p'-biphenol

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Wakayama, Japan

Shunji Yago