C - Chemistry – Metallurgy – 08 – H
Patent
C - Chemistry, Metallurgy
08
H
C08H 8/00 (2010.01) C07H 3/06 (2006.01) C08L 97/02 (2006.01)
Patent
CA 2675940
Solid Oligosaccharides and Polysaccharides (SOP) are obtained from tissues of plants through the basic SOP process. A batch consisting of small pieces of plant tissue is soaked in alkaline solution at ambient temperature and pressure in a pulp-mill batch digester or similar extraction vessel. The alkaline extract is separated from the insoluble residue in the extraction vessel and transferred as clear solution to a SOP-forming tank, and the insoluble residue of plant tissue remaining in the extraction vessel is soaked in a second volume of alkaline solution. That second volume of alkaline extract is also transferred to a SOP-forming tank, whereupon the insoluble residue remaining in the extraction vessel is processed into pulp and paper or other products using established methods. SOP is produced in the SOP-forming tank as a coagulated suspension by adding to a volume of alkaline extract an equal volume of an aliphatic alcohol and mixing the two. SOP is concentrated, bleached and/or washed then dehydrated in a SOP separator. Alcohol used in the process is recovered by distillation, and the residual alkaline solution is adjusted to the desired concentration by addition of alkali then returned to the extraction vessel for treatment of another batch of plant tissue pieces. Potential uses of SOP are multi-faceted, e.g., as digestive fibre, foodstuff (e.g., syrup, sweetener), gum, paper additive, bulking agent in pharmacy or well-drilling, and as soluble carbohydrate for production of alcohol through fermentation or for other purposes including energy production.
Savidge Rodney A.
Stikeman Elliott S.e.n.c.r.l.,srl/llp
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