Catalytic activity of sulfur resistant catalysts on the isomerization of a mixture of pinenes poisoned with thiophene as crude sulfate turpentine model

Ruby Cid ^[1] ; Wolfgang F. Hölderich ^[2] ; Alberto Miranda ^[1] ; Dominique M. Roberge ^[2] ; Miguel Zárraga ^[1]
1. [1] Universidad de Concepción
  
  Universidad de Concepción
  
  Comuna de Concepción, Chile
2. [2] University of Technology
  
  University of Technology
  
  Rusia
Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 48, Nº. 2, 2003, págs. 61-65
Idioma: inglés
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Resumen
- The catalytic activity of Pd and Pd-M bimetallic catalysts (M = Cr, Cu, Pt, Ag) on different solid supports for isomerization in gas phase of a mixture of pinenes poisoned with 4000 pmm of sulfur as thiophene was studied. This mixture was used as a model of crude sulfate turpentine (CST), which is a cheap and valuable source of pinenes. The major product of this reaction is p-cymene, an important product in chemical industry. It was found that Pd-Pt/ SiO2-Al2O3 gives a selectivity of 65-70% and a conversion of 98%. Molecular sieves as catalyst support were also investigated but the activity was not as better as the SiO2 or SiO2-Al2O3 for the targeted reaction