Patent ID: 6174490
Filing Date: 2001-01-16
Classification: B01D,B28B,C04B,F28F

Abstract:
A method for producing an exchanger, which comprises:providing an enclosure;positioning a plurality of hollow exchanger ceramic tubes in said enclosure;positioning one of the ends of said tubes in or onto a mold;introducing a slurry of a ceramic and at least one solvent into said mold to obtain a layer of slurry having the shape of a pipe plate;said mold comprised of a material having solvent absorbing properties;removing the mold;sintering said slurry together with the tubes after removal of the mold to obtain a solid ceramic and produce a pipe plate with said tubes being sealingly received at said ends in said pipe plate; said slurry being selected such that the thermal expansion coefficient of the pipe plate differs less than 5.times.10.sup.-6 K.sup.-1 from the thermal expansion coefficient of said tubes;said slurry having after sintering a shrinkage of less than 0.5%; andsaid enclosure being sealed relative to said pipe plate.