Apparatus for growing zeolite crystals from an aqueous solution

摘要

The metallic pressure vessel (22) contains aqueous solution (5) for growing zeolite crystals, to which microwave energy is supplied from an arrangement of a capacitor connected to a coaxial cable (24) and with the aqueous solution between the capacitor plates (1,2). One (2) of the plates is formed by a housing wall, to which the coaxial cable is attached with the inner lead (15) connected to the other capacitor plate (1) within the pressure vessel. A dielectric wall (4) preferably connects the plates, forming an enclosed cell and the wall is of "Teflon" (RTM; polytetrafluoroethylene, PTFE) or polyetheretherketone (PEEK). A displaceable ram (8) may be provided to equalise pressure between the pressure vessel and the solution to be heated.