Generation of chemical building blocks from plant biomass by selective depolymerization

US8524471B2 · kind B2 · utility

Assignee

• SUD-CHEMIE IP GMBH & CO. KG · DE

Inventors

• Andre Koltermann · Icking, DE
• Ulrich Kettling
• Thomas Brück · Moosinning, DE
• Markus Rarbach · Cologne, DE

Key dates

• Filing date: Jun 12, 2008
• Grant date: Sep 3, 2013
• Expiry date: Jul 14, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C13K13/002
• WIPO field: Food chemistry
• WIPO sector: Chemistry

Abstract

The invention concerns a method for the enzymatic treatment of raw polymeric feedstock comprising the following steps: (a) preferably separation of soluble components from the raw polymeric feedstock, (b) treating the raw polymeric feedstock with an enzyme system in order to liberate defined soluble monomeric or oligomeric building blocks from the insoluble raw polymeric feedstock; and (c) separating the defined monomeric or oligomeric building blocks produced in step b) from the remainder of the raw polymeric feedstock. Preferably, the enzyme system used in step b) contains not more than 50%, preferably not more than 20%, more preferably not more than 10%, more preferably not more than 5%, more preferably not more than 2%, more preferably not more than 1% of other enzyme activities apart from the enzyme activity resulting in liberation of said defined monomeric or oligomeric building blocks from the raw polymeric feedstock according to step b). Further aspects of the invention concern the use of “less pure” and thus less costly enzyme systems in subsequent enzymatic treatment steps and methods for determining the optimum sequence of enzymatic treatment steps by analysis of the raw…