(EP511307-A1)      Catalytic reactor for gas phase chemical reactions comprises (a) a housing extending along an axis from an enclosed first end to an enclosed second end, and having a continuous interior surface, the first end defining an inlet opening for allowing introduction of a gaseous reactant stream to the housing and the second end defining an outlet opening for allowing a gaseous product stream to exit the housing; (b) a bed of catalyst particles disposed within the housing, the catalyst particles being catalytically active in the gas phase chemical reaction; (c) a porous support for supporting the bed of catalyst particles within the housing; and (d) a filter, extending across the housing in a plane perpendicular to the axis of the housing and between the catalyst bed and the outlet opening of the housing, for preventing transport of the catalyst particles from the housing in the gaseous product stream.    ADVANTAGE -   The reactor filter pad provides a large filter surface area relative to the cross-sectional area of the reactor, is able to trap a relatively large quantity of particulate debris without clogging and is therefore unlikely to impose a large pressure drop across the reactor.    (JP5504230-W)      Catalytic reactor for gas phase chemical reactions comprises (a) a housing extending along an axis from an enclosed first end to an enclosed second end, and having a continuous interior surface, the first end defining an inlet opening for allowing introduction of a gaseous reactant stream to the housing and the second end defining an outlet opening for allowing a gaseous product stream to exit the housing; (b) a bed of catalyst particles disposed within the housing the catalyst particles being catalytically active in the gas phase chemical reaction; (c) a porous support for supporting the bed of catalyst particles within the housing; and (d) a filter, extending across the housing in a plane perpendicular to the axis of the housing and between the catalyst bed and the outlet opening of the housing, for preventing transport of the catalyst particles from the housing in the gaseous product stream.    ADVANTAGE -   The reactor filter pad provides a large filter surface area relative to the cross sectional area of the reactor, is able to trap a relatively large quantity of particulate debris without clogging and is therefore unlikely to impose a large pressure drop across the reactor.    (JP2835182-B2)      Catalytic reactor for gas phase chemical reactions comprises (a) a housing extending along an axis from an enclosed first end to an enclosed second end, and having a continuous interior surface, the first end defining an inlet opening for allowing introduction of a gaseous reactant stream to the housing and the second end defining an outlet opening for allowing a gaseous product stream to exit the housing; (b) a bed of catalyst particles disposed within the housing the catalyst particles being catalytically active in the gas phase chemical reaction; (c) a porous support for supporting the bed of catalyst particles within the housing; and (d) a filter, extending across the housing in a plane perpendicular to the axis of the housing and between the catalyst bed and the outlet opening of the housing, for preventing transport of the catalyst particles from the housing in the gaseous product stream.    ADVANTAGE -   The reactor filter pad provides a large fitler surface area relative to the cross sectional area of the reactor, is able to trap a relatively large quantity of particulate debris without clogging and is therefore unlikely to impose a large pressure drop across the reactor.