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Katalytisches Verfahren zur Gewinnung von chemischen Grundstoffen aus nachwachsenden Rohstoffen

Preparing lactic acid/lactate, useful e.g. as monomer for plastics, and in cosmetics and food products as food additives, comprises reacting 3-carbon containing organic starting compound, in presence of transition metal catalyst
 
: Danzig, J.; Fastabend, A.; Grän-Heedfeld, J.; Kraft, A.

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Frontpage ()

DE 102008013474 A: 20080310
DE 102008013474 A: 20080310
C07C0051
C07C0059
B09B0003
German
Patent, Electronic Publication
Fraunhofer UMSICHT Oberhausen ()

Abstract
(A1) Gegenstand der Erfindung ist ein katalytisches Verfahren zur Herstellung bzw. Gewinnung von chemischen Grundstoffen aus nachwachsenden Rohstoffen, insbesondere von 2-Hydroxypropansaeure (Milchsaeure) oder Salzen der Milchsaeure (Lactaten), ausgehend von Glycerinen oder Zuckern.

 

EP 2100871 A1 UPAB: 20091001 NOVELTY - Preparation of 2-hydroxy propanoic acid (lactic acid) or its salts (lactate), comprises reacting at least a 3 carbon atom containing organic starting compound, which is a primary alcohol (I) and/or an aldehyde (II), where (I) and/or (II) exhibits a hydroxyl group in alpha -position to the primary alcohol function and/or to the aldehyde group, and a hydroxyl- or ether group in beta -position to the primary alcohol function and/or to the aldehyde group, in the presence of a transition metal catalyst. USE - The lactic acid or lactate is useful: as a monomer for plastics (polylactic acid or polylactide) or as a basic component for solvents or surfactants; and in various products, such as in cosmetics, food products as food additives and agrochemicals. ADVANTAGE - The process provides lactic acid or lactate with good to high selectivity and with high yield, without any significant caramelization of the parent compound. The resulting by-product (1,2-propanediol) can be recycled to lactic acid.

: http://publica.fraunhofer.de/documents/N-106392.html