Patent ID: 7820417
Filing Date: 2010-10-26
Classification: C07C,C12M,C12P,Y02E

Abstract:
1. A method of obtaining a fermentation product comprising: treating biomass with lime an inoculum to produce a fermentation broth; acidifying the fermentation broth to produce acidified fermentation broth; stripping the acidified fermentation broth in a stripping column to produce stripped fermentation broth; concentrating the stripped fermentation broth in an evaporator to produce a concentrate; mixing the concentrate with a first tertiary amine and carbon dioxide to produce a mixture comprising a carboxylate of said first tertiary amine and calcium carbonate; removing calcium carbonate from said mixture; exchanging the mixture with a second tertiary amine to produce an intermediate comprising a carboxylate of said second tertiary amine, wherein said second tertiary amine has a higher molecular weight than said first tertiary amine; and heating the intermediate to a temperature sufficient to break acid/amine bonds to produce at least one free carboxylic acid.