Patent ID: 8393478
Filing Date: 2013-03-12
Classification: B01D

Abstract:
1. An inorganic membrane, the inorganic membrane comprising α-alumina, wherein the α-alumina has a pore structure having a mean pore size of up to about 50 nm and a mean particle size in a range from about 10 nm to about 100 nm, and wherein the α-alumina is formed by: a. providing a coating slip, the coating slip comprising δ-alumina; b. applying the coating slip to a support surface to form a coating layer; c. drying the coating layer; and d. firing the dried coating layer at a temperature of at least about 1000° C. to convert at least a portion of the δ-alumina to α-alumina and form the inorganic membrane, wherein the pore structure is stable at temperatures in a range from 1200° C. up to about 1400° C.