Process for the production of alcohol

C - Chemistry – Metallurgy – 13 – K

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C13K 1/02 (2006.01)

Patent

CA 2749100

The invention provides a process for producing alcohol from a cellulosic material, said process comprising the steps of : (i) hydrolyzing said cellulosic material with an aqueous acid to produce a hydrolysate; (ii) extracting acid and water from said hydrolysate with a water-miscible organic extraction solvent to yield (a) a first aqueous acidic solution containing said extraction solvent and (b) a residue containing sugars,- (iii) subjecting said residue to an oligosaccharide cleavage reaction to yield an aqueous solution of fermentable sugars; (iv) fermenting said fermentable sugars and distilling alcohol from the resulting fermented mixture; (v) evaporating said extraction solvent from said first solution to yield (a) a second aqueous acid solution containing no more than 10 % wt., preferably no more than 5 % wt., of said extraction solvent and (b) gaseous extraction solvent; (vi) condensing said gaseous extraction solvent for recycling; and, optionally, (vii) concentrating said second aqueous acid solution for recycling; wherein said extraction solvent is liquid at the temperature and pressure of step (ii), has a boiling point of from 25 to 60 °°C at a pressure in the range 1 to 8 bar, and is such that water-soluble oligosaccharides are precipitated from solution by its addition in step (ii).

La présente invention concerne un procédé pour la production dalcool à partir dune matière cellulosique, ledit procédé comprenant les étapes suivantes: (i) lhydrolyse de ladite matière cellulosique avec un acide aqueux pour produire un hydrolysat; (ii) lextraction dacide et deau à partir dudit hydrolysat avec un solvant dextraction organique miscible à leau pour obtenir (a) une première solution aqueuse dacide contenant ledit solvant dextraction et (b) un résidu contenant des sucres; (iii) le traitement dudit résidu par une réaction de clivage doligosaccharides pour obtenir une solution aqueuse de sucres fermentables; (iv) la fermentation desdits sucres fermentables et la distillation dalcool à partir du mélange fermenté; (v) lévaporation dudit solvant dextraction à partir de ladite première solution pour obtenir (a) une seconde solution aqueuse dacide ne contenant pas plus de 10% en poids, de préférence pas plus de 5% en poids, dudit solvant dextraction et (b) un solvant dextraction gazeux; (vi) la condensation dudit solvant dextraction gazeux pour recyclage; et, éventuellement, (vii) la concentration de ladite seconde solution aqueuse dacide  pour recyclage, ledit solvant dextraction étant liquide à la température et à la pression de létape (ii), présentant un point débullition compris entre 25 et 60°C à une pression comprise entre 1 et 8 bar, et est tel que des oligosaccharides hydrosolubles sont précipités de la solution par son addition à létape (ii).

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Process for the production of alcohol does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the production of alcohol, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of alcohol will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1900677

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.