An improved methanol-to-olefin (MTO) product recovery scheme is provided which enables substantial reduction in the amount of light olefins that are undesirably captured in a dimethylether (DME) recycle stream and improved recovery of methanol when a portion of the methanolic feed to the MTO reaction...http://www.google.com.au/patents/US7132580?utm_source=gb-gplus-sharePatent US7132580 - Selective dimethylether and methanol recovery and recycle in a methanol-to-olefin process
