Abstract: A molecular sieve material for removing water from a liquid, such as distilled alcohol produced from grain, is placed in a series of concentric cylindrical spaces of narrow but equal width and separated by concentric cylindrical passages of lesser width, through which a heated gas, such as air containing the gaseous product of combustion of a fuel, is passed for heating the material for regeneration. After heating, the material is cooled by a gas, such as air, through the same passages. The cylindrical sleeves forming the spaces and passages are relatively thin and the spaces are closed at opposite ends by annular rings to which the sleeves are attached, as by welding, with spacing blocks at spaced points in the passages. Additional rings, of slightly less width than the spaces, are spot welded just inside the end rings to permit flow of liquid but retain the sieve material.