Deaminocyclization of diethylenetriamine to N-heterocycles over zeolites

B, Srinivas and S J, Kulkarni and M. , Subrahmanyam and A V , Rama Rao (1995) Deaminocyclization of diethylenetriamine to N-heterocycles over zeolites. Zeolites, 15 (7). pp. 660-662.

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Official URL: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V5G-3SRS5J9-6S&_user=518931&_coverDate=10%2F31%2F1995&_alid=590951277&_rdoc=74&_fmt=full&_orig=search&_cdi=5786&_sort=d&_docanchor=&view=c&_ct=151&_acct=C000025838&_version=1&_urlVersion=0&_userid

Abstract

The deaminocyclization of diethylenetriamine was carried out over HZSM-5 (Si/Al= 30–280), HM, HY, SAPO-40 type catalysts. The reaction was carried out in the temperature range of 300–400°C and 0.5 h−1 weight hourly space velocity in the presence of water. The total yield of N-heterocycles varied from 32 to 77 wt% at 400°C reaction temperature. At a low temperature (300°C), the selectivity to piperazine is more, whereas at 400°C the selectivity to pyrazine and dehydrogenated heterocycles increases due to dehydrogenation over basic centers generated because of the coke.

Item Type:	Article
Uncontrolled Keywords:	zeolites; diethylenetriamine; N-heterocycles; deaminocyclization
Subjects:	Science > Chemistry
ID Code:	937
Deposited By:	Prof Balasubramanian Viswanathan
Deposited On:	20 Jun 2007 11:28
Last Modified:	20 Jun 2007 11:28

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