Patent ID: 6224843
Filing Date: 2001-05-01
Classification: B01D,C01B

Abstract:
A process for production of substantially pure carbon dioxide from a CO.sub.2 off-gas stream from an ethylene glycol plant comprising unsaturated hydrocarbons, saturated hydrocarbons, chlorinated hydrocarbons, carbon dioxide and water, said process comprising:condensing out water initially present in the CO.sub.2 off-gas stream to produce a dewatered off-gas stream;subjecting the dewatered off-gas stream to catalytic oxidation in the presence of excess oxygen whereby said unsaturated hydrocarbons, saturated hydrocarbons and chlorinated hydrocarbons are oxidized producing an oxidation product stream comprising carbon dioxide, water and hydrochloric acid;contacting the oxidation product stream with HCl adsorbent to adsorb hydrochloric acid producing an adsorbent-contacted stream; andcollecting substantially pure carbon dioxide from the absorbent-contacted stream.