Process for producing carbon membranes
First Claim
Patent Images
1. A process for producing a carbon membrane, the process comprising:
- producing a surface mesoporous ceramic oxide layer atop a substrate carrier layer by a sol-gel technique, thereby obtaining a porous substrate,coating the porous substrate with a solution of an organic polymer which can be converted to a carbon membrane by pyrolysis to form a polymer coating,drying the polymer coating on the porous substrate by removing solvent to form a dry polymer coating, andpyrolyzing the dry polymer coating on the porous substrate, thereby forming the carbon membrane at a temperature higher than a baking temperature of the porous substrate,wherein any one of the coating, drying or pyrolyzing or a sequence of the coating, drying and pyrolyzing is optionally conducted more than once, andthe surface mesoporous ceramic oxide layer has a baking temperature below a pyrolysis temperature of the organic polymer.
2 Assignments
0 Petitions
Accused Products
Abstract
The use of solutions of organic polymers for production of carbon membranes suitable for gas separation, and a process for producing carbon membranes suitable for gas separation, comprising the steps of a) coating a porous substrate with solutions of organic polymers, b) drying the polyester coating on the porous substrate by removing the solvent, and c) pyrolyzing the polyester coating on the porous substrate to form the carbon membrane suitable for gas separation, it being possible to conduct any of steps a) to c) or the sequence of steps a) to c) more than once.
15 Citations
13 Claims
-
1. A process for producing a carbon membrane, the process comprising:
-
producing a surface mesoporous ceramic oxide layer atop a substrate carrier layer by a sol-gel technique, thereby obtaining a porous substrate, coating the porous substrate with a solution of an organic polymer which can be converted to a carbon membrane by pyrolysis to form a polymer coating, drying the polymer coating on the porous substrate by removing solvent to form a dry polymer coating, and pyrolyzing the dry polymer coating on the porous substrate, thereby forming the carbon membrane at a temperature higher than a baking temperature of the porous substrate, wherein any one of the coating, drying or pyrolyzing or a sequence of the coating, drying and pyrolyzing is optionally conducted more than once, and the surface mesoporous ceramic oxide layer has a baking temperature below a pyrolysis temperature of the organic polymer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
Specification