Gupte, S. P. ; Chaudhari, R. V. (1984) Carbonylation of 2,4-dinitrotoluene using homogeneous Pd and Rh complex catalysts Journal of Molecular Catalysis, 24 (2). pp. 197-210. ISSN 0304-5102
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/030451...
Related URL: http://dx.doi.org/10.1016/0304-5102(84)85131-7
Abstract
The activity of Pd and Rh complex catalysts (Pd(py)2Cl2, Rh(py)3Cl3, etc.) in the carbonylation of 2,4-dinitrotoluene (DNT) has been investigated, and the effect of ligands, metal oxide and chloride promoters on the conversion of DNT and selectivity of isocyanates has been studied. It was found that these catalysts exhibit very high selectivity for total isocyanates. The intermediate isocyanates formed were characterized by GC-MS techniques. The effects of free pyridine on the activity of both Pd and Rh complex catalysts showed that an optimum ratio of py/metal exists for a given set of conditions. The influence of CO pressure, catalyst concentration, DNT concentration, temperature and contact time on the activity of the Pd(py)2Cl2 catalyst was also studied. It was observed that higher CO pressure and catalyst concentration with a shorter contact time are conditions which favour higher selectivity for 2,4-toluene diisocyanate.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 8012 |
| Deposited On: | 25 Oct 2010 09:47 |
| Last Modified: | 30 May 2011 05:18 |
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