Patent ID: 8704016
Filing Date: 2014-04-22
Classification: C07C

Abstract:
1. A multi-raffinate simulated moving bed (SMB) process for the separation of ethanol and butanediol from an aqueous biomass effluent stream from a fermentor, said biomass effluent stream comprising water, ethanol, butanediol, acetic acid, and suspended solids, said multi-raffinate SMB process having an SMB zone comprising a desorption zone, a rectification zone, an adsorption zone, and at least one regeneration zone, said process comprising: a. passing the aqueous biomass effluent stream to a pretreatment zone including a naturation zone and a filtration zone to provide an SMB feed stream; b. passing the SMB feed stream at an effective feed temperature and a mobile phase desorbent stream at an effective desorbent temperature, said mobile phase desorbent stream comprising a C c. passing at least a portion of the primary raffinate stream to the at least one regeneration zone to provide at least one secondary raffinate stream; and, d. passing the extract stream to a product recovery zone to separate and recover ethanol and butanediol products from the extract stream.