Catalysis Communications

Synthesis of 3, 3′-dimethyl-4, 4′-diaminodiphenylmethane catalyzed by zeolites replacing mineral acids

…, Y Zhao, S Zhang, L Wang, Y Wang, Y Guo

Index: Lin, Xiao; Zhao, Yingxian; Zhang, Shengjian; Wang, Lingyun; Wang, Yi; Guo, Yanna Catalysis Communications, 2014 , vol. 45, p. 69 - 73

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Abstract

Abstract Synthesis of 3, 3′-dimethyl-4, 4′-diaminodiphenylmethane (MDT) from o- tolylamine and formaldehyde over zeolites was investigated. Among the three tested zeolites, Hβ showed higher catalytic activity than HY and HZSM-5 for MDT synthesis. In the case of Hβ as a catalyst, the effects of feed composition, reaction time and temperature on the yield and selectivity of product MDT were further examined to optimize process ...