C - Chemistry – Metallurgy – 12 – F
Patent
C - Chemistry, Metallurgy
12
F
C12F 3/10 (2006.01) A23K 1/06 (2006.01) B01D 61/58 (2006.01) C12F 3/06 (2006.01) C12P 7/06 (2006.01)
Patent
CA 2099835
27 MEMBRANE-BASED PROCESS FOR THE RECOVERY OF LACTIC ACID AND GLYCEROL FROM A "CORN THIN STILLAGE STREAM ABSTRACT OF THE DISCLOSURE "Thin stillage", discharged from a centrifuge in which relatively large >10~m insoluble solids in an ethanol stillbottoms stream are separated from "whole stillage", is separated in a step-wise membrane separation process to recover lactic acid and glycerol, together. In each step, the permeate recovery is at least 50%. In a first step, an ultrafiltration (~F) membrane means produces a UF permeate stream in which not only essentially all the insoluble por- tion of said thin stillage >0Ø05~m is removed as UF con- centrate, but also at least 50% of solubles having a molecular weight >2x105 Daltons, including dissolved proteins in said thin stillage. In a second step to which the UF permeate is fed, a nanofiltration (NF) membrane produces a NF permeate with a rejection of less than 30% of both the lactic acid and the glycerol, preferably less than 25%. Essentially all molecules larger than lactic acid or glycerol are removed in the NF concentrate. In a third step, to which the NF permeate is fed, a reverse osmosis (RO)membrane means produces demineralized RO water which contains essentially no lactic acid and glycerol, because these are rejected in the RO concentrate. Use of the membrane separation process in the production of ethanol based on the dry-milling of corn, eliminates the use of a conventional evaporator.
Bento John Mario A.
Fleming Hubert L.
Rock H. Wayne
Zenon Environmental Inc.
LandOfFree
Membrane-based process for the recovery of lactic acid and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Membrane-based process for the recovery of lactic acid and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Membrane-based process for the recovery of lactic acid and... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1609011