Abstract: A catalytic combustion reactor system comprises a heat exchange unit that comprises a bundle of open-ended tubes, the bundle having first and second collective ends, the first collective end adjoining a catalytic reactor that comprises a plurality of catalyst containing housings each of which is provided with an opening for the inflow of fluid for combustion and an opening for the outflow of fluid combustion product; an outer shell that envelopes the adjoined heat exchange unit and catalytic reactor and permits the flow of fluid to contact the heat exchange tube surfaces to absorb heat generated by the combustion reaction and to enter the inlet openings of the catalyst containing housings, the shell having a single fluid inlet in the area of the second collective end of the heat exchange unit, thereby allowing contact of the entire length of the tubes of the bundle with the incoming fluid for the exchange of heat; and a single outlet at the second collective end of the heat exchange unit which collects combus

Abstract: A catalytic combustion reactor, which comprises a heat exchanger unit and a catalytic structure unit, which are formed so as to have an integral outer shell; the heat exchanger unit housing a tube bundle, which includes a heat exchanger tube and tube plates provided at both ends of the heat exchanger tube; the catalytic structure unit housing a catalytic structure including openings, which, respectively, work as an inflow surface for a fluid to be subjected to combustion reaction and an outflow surface for the fluid after combustion reaction; the tube bundle and the catalytic structure being coupled such that one of the tube plates communicates with one of the openings of the catalytic structure at a connection portion in the reactor; and the outer shell being formed in such a shape to surround the tube bundle and the catalytic structure so as to ensure a communication passage between the heat exchanger unit and the other opening of the catalytic structure, is used to carry out combustion reaction.

Abstract: Process for producing vinylchloride monomer by pyrolysis of 1,2-dichloroethane comprising carrying out heat exchange between a high temperature cracked gas produced as a result of the pyrolysis product and the 1,2-dichloroethane which is introduced into the pyrolysis furnace with a flow rate of the cracked gas at 5 m/s or more but less than 20 m/s until the cracked gas is cooled down to 180.degree.-350.degree. C. and introducing the 1,2-dichloroethane into the furnace for the pyrolysis.