Tin-sulfur based catalysts for acetylene hydrochlorination.

In the present work, tin-sulfur based catalysts were prepared using Na2SO3 and (CH3SO3)2Sn and were tested in acetylene hydrochlorination. Based on the analysis of experiments results, the acetylene conversion of (CH3SO3)2Sn/S@AC is still over 90%after a 50 h reaction, at the reaction conditions of T = 200 oC, VHCl/VC2H2 = 1.1:1.0 and C2H2-GSHV = 15 h-1. According to the results of X-ray photoelectron spectroscopy (XPS), HCl adsorption experiments, and acetylene temperature programmed desorption (C2H2-TPD), it is reasonable to conclude that the interaction between Sn and S not only can retard the oxidation of Sn2+ in catalysts but also strengthen the reactant adsorption capacity of tin-based catalysts. Furthermore, results obtained from nitrogen adsorption/desorption and XPS proved that the CH3SO3- can effectively decrease the coke deposition of (CH3SO3)2Sn/AC and thus prolong the lifetime of (CH3SO3)2Sn/AC.

Benzyl 3-(10-oxo-9,10-dihydrophenanthren-9-ylidene)dithiocarbazate.

In the title compound, C(22)H(16)N(2)OS(2), the phenanthrene ring is nearly perpendicular to the phenyl ring, making a dihedral angle of 87.2 (2)°. Intra-molecular N-H⋯O inter-actions are present. In the crystal structure, the mol-ecules are linked through inter-molecular C-H⋯O inter-actions. The crystal structure is also stabilized by C-H⋯π inter-actions and weak π-π contacts [centroid-centroid distance = 3.36 (6) Å].