Bivalent copper oligopyrocatecholate as a novel heterogeneous catalyst for the oxidative degradation of mercaptan in caustic solution: Synthesis, characterization, and kinetic study.

A novel catalyst based on bivalent copper oligopyrocatecholate was first successfully synthesized and dispersed in a polymer matrix for oxidative degradation of mercaptan in aqueous caustic solution. X-ray diffraction analysis has demonstrated that the synthesized catalyst was a crystalline phase with a minimum amorphous component. Mechanism analysis and kinetic experiments were conducted to investigate the kinetic mechanism of the reaction of isopropyl mercaptan oxidation catalyzed by copper oligopyrocatecholate dispersed in a polymer matrix.

Oxidative degradation of inorganic sulphides in the presence of a catalyst based on 3,3', 5,5'-tetra-tert-butyl-4,4'-stilbenequinone.

The aim of this study is to monitor the kinetics and mechanism of liquid-phase oxidation of inorganic sulphide by oxygen in the presence of a catalyst based on 3,3',5,5'-tetra-tert-butyl-4,4'-stilbenequinone. The research results point out that this reaction has a first order with respect to each reactant. The effects of temperature, initial sulphide concentration, intermediate and final oxidation products, the nature of inorganic sulphides as well as the catalyst concentration on aqueous sulphide oxidation efficiency were investigated.

Polymeric heterogeneous catalysts of transition-metal oxides: surface characterization, physicomechanical properties, and catalytic activity.

We investigate the physicomechanical properties of polymeric heterogeneous catalysts of transition-metal oxides, specifically, the specific surface area, elongation at break, breaking strength, specific electrical resistance, and volume resistivity. Digital microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and energy-dispersive analysis are used to study the surfaces of the catalysts. The experimental results show that polymeric heterogeneous catalysts of transition-metal oxides exhibit high stability and can maintain their catalytic activity under extreme reaction conditions for long-term use.