초록 ▼

A process for the production of ethanol, useful as a fuel, from various cellulose-containing materials by saccharification, fermentation and distillation of the resultant fermented ethanol-containing beer to recover ethanol; which comprises the formation of a slurry of the material being saccharifie

A process for the production of ethanol, useful as a fuel, from various cellulose-containing materials by saccharification, fermentation and distillation of the resultant fermented ethanol-containing beer to recover ethanol; which comprises the formation of a slurry of the material being saccharified by recycling a portion of the resultant fermented ethanol-containing beer back to the incoming material being subjected to saccharification whereby the concentration of ethanol during fermentation and subsequent distillation treatment is substantially increased over that utilizing no recycling treatment, the process being carried out at under normal atmospheric conditions.

대표청구항 ▼

A continuous process for the production of ethanol, useful as a fuel, from cellulosic-containing materials which comprises the steps of: (a) forming a slurry mass of cellulosic material by mechanically defibering said material in a liquid mixture comprising recycled ethanol-containing beer; (b) subj

A continuous process for the production of ethanol, useful as a fuel, from cellulosic-containing materials which comprises the steps of: (a) forming a slurry mass of cellulosic material by mechanically defibering said material in a liquid mixture comprising recycled ethanol-containing beer; (b) subjecting said slurry mass to saccharification reaction in the presence of enzyme to form fermentable sugars from the mixture; (c) subjecting said fermentable sugar mixture at a suitable temperature to fermentation reaction with added yeast to produce an ethanol-containing beer; said beer additionally containing unreactive cellulosic materials; (d) separating a portion of the ethanol-containing solution and dregs; (e) recycling a portion of the product of step (c) back through said saccharification step and fermentation reaction step; and (f) subjecting the product resulting from step (e) to distillation to recover ethanol whereby the concentration of ethanol during fermentation and subsequent distillation treatment is substantially increased and the recovery of ethanol enhanced.