Production of p-vinylphenol by dehydrogenation of p-ethylphenol

Abstract

Abstract PURPOSE:To improve the selectivity of p-vinylphenol in the vapor-phase dehydrogenation of p-ethylphenol in the presence of a catalyst and diluent, by carrying out the reaction in the presence of a specific amount of phenol and/or p- cresol. CONSTITUTION:p-Vinylphenol is produced by contacting p-ethylphenol with a dehydrogenation catalyst in vapor phase in the presence of a diluent such as water, benzene, nitrogen, carbon dioxide gas, etc., especially water (steam). The reaction is carried out in the presence of phenol and/or p-cresol, to suppress the side reactions, improve the selectivity of the objective compound in an industrial scale, and reduce the loss of the raw material. The weight ratio of phenol: p- cresol is 1:1-3, and the amount of the additive is 5-50wt%, especially 7- 40wt% based on the raw material.

Inventors

• 👤 Hiroshi Fujiwara
• 👤 寛 藤原
• 👤 Hatsutaro Yamazaki
• 👤 山崎　初太郎
• 👤 Kazuo Ozawa
• 👤 小沢　計雄

Bibliographic Details