Efficient, reliable and uniform charging of cylindrical honeycomb member - includes passing carrier gas through honeycomb member in closed circuit, etc.

摘要

Uniformly charging a cylindrical honeycombed member which has axial flow channels with an impregnation soln. whose concn. and quantity are adjusted to below a desired minimum liq. take-up capacity, includes passing a carrier gas through the honeycombed member in a closed circuit. The desired quantity of impregnation soln. is closed into the carrier gas at the inlet side of the honeycombed member, and is uniformly pptd. both axially and radially, by circulating the gas through the circuit several times. ADVANTAGE - The process is efficient and reliable and has good reproducibility.