A process for the production of a carbon membrane comprising: (i) reacting a mixture of cellulose and hemicellulose with an acid; (ii) casting the mixture to form a film, (iii) drying said film; and (iv) carbonizing said film....http://www.google.com.au/patents/US7947114?utm_source=gb-gplus-sharePatent US7947114 - Carbon membranes
