42 engineering, product development and technical consultation and research in the field of activation or reactivation of hydrocarbon processing catalysts; advise and provision of technical information relating to activation or reactivation of hydrocarbon processing catalysts; chemical plant or refinery operation services; consultant and use in manufacture of chemicals for activation or reactivation of hydrocarbon processing catalysts; consultant and technical information relating to provision, installation, operation and disposal of hydrocarbon processing catalysts