کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
49743 46764 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of 3,3′-dimethyl-4,4′-diaminodiphenylmethane catalyzed by zeolites replacing mineral acids
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Synthesis of 3,3′-dimethyl-4,4′-diaminodiphenylmethane catalyzed by zeolites replacing mineral acids
چکیده انگلیسی


• A new route of synthesizing MDT catalyzed by zeolites replacing mineral acids
• The catalytic activity varied with the order of Hβ > HY > HZSM-5
• High MDT yield of 87.5% by Hβ under optimal reaction conditions
• N, N′-di-o-tolyl-methanediamine found to be a key reaction intermediate

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 conditions. In an o-tolylamine:formaldehyde = 8:1 molar ratio, the two-step reaction running at 413 K for 0.5 h and then 433 K for 0.5 h gave the MDT yield of 87.5%.

Overview of reaction sequence for MDT synthesis over Hβ zeolite.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Communications - Volume 45, 5 February 2014, Pages 69–73
نویسندگان
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