Srinivas, B. ; Kulkarni, S. J. ; Subrahmanyam, M. ; Rama Rao, A. V. (1995) Deaminocyclization of diethylenetriamine to N-heterocycles over zeolites Zeolites, 15 (7). pp. 660-662. ISSN 0144-2449
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/014424...
Related URL: http://dx.doi.org/10.1016/0144-2449(95)00048-B
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 |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Zeolites; Diethylenetriamine; N-heterocycles; Deaminocyclization |
| ID Code: | 38885 |
| Deposited On: | 05 May 2011 07:48 |
| Last Modified: | 05 May 2011 07:48 |
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