The present invention is a process for removal of carbon dioxide from a reactor effluent stream comprising water, carbon dioxide and olefin(s), where a portion of the carbon dioxide is removed in a quenching step with a quench medium and more carbon dioxide is removed by contacting the quenched effluent...http://www.google.com.au/patents/US7135604?utm_source=gb-gplus-sharePatent US7135604 - Process for separating carbon dioxide from an oxygenate-to-olefin effluent stream