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Cyclization of Pseudoionone Catalyzed by Sulfuric Acid in a Microreactor
Author(s) -
Zhou Feng,
Zhang Boyu,
Yao Chaoqun,
Zhu Kai,
Yang Mei,
Chen Guangwen
Publication year - 2016
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201500670
Subject(s) - microreactor , sulfuric acid , yield (engineering) , catalysis , chemistry , molar ratio , brønsted–lowry acid–base theory , ionone , organic chemistry , materials science , metallurgy
A microreactor system was developed to investigate the cyclization of pseudoionone (PI) catalyzed by sulfuric acid. The conversion of PI and selectivities of α ‐ionone and β ‐ionone were explored under various conditions. The effects of residence time, molar ratio of acid/PI (M‐ratio), reaction temperature, and sulfuric acid concentration on the reaction were evaluated. Sulfuric acid concentration was found to play a vital role in the reaction system, which could greatly influence the conversion and selectivities. A high yield of β ‐ionone and total yield of α ‐ionone and β ‐ionone were achieved under optimized conditions. The formation of by‐products was determined in detail and the side reactions could be restrained by optimizing the reaction parameters.