Organic solvent sepn. from exhaust air - by concn. of solvent by selective gas permeation sufficiently for auto-thermal combustion, and feeding conc. permeate to catalytic combustion system

摘要

The method separates organic solvents from currents of exhaust air. By selective gas-permeation, a concn. of the solvent in the permeate is achieved which is sufficient for subsequent autothermal combustion. The concd. permeate can be fed to a catalytic combustion system, the catalyst being of metallised zeolite, perovskite or precious metal (Pt, Ir, Rh). The gas-permeation stage can be operated with flushing gas, using composite hollow-fibre modules, while the selective coatings can be PDMS, NBR, SBR (Sic) or their co-polymers. ADVANTAGE - Ecomonic disposal of CKW (sic)-laden exhaust air current