Lonza Inc.

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Miguel Angel Caraucán Dávila

Dario Veghini

Antonio Zanotti-Gerosa

Hans Guenter Nedden

Gesa Paradies

Anton Zenklusen

Golo Heckmann

Thomas Ward

Christophe Malan

Julien Pierron

Laleh Jafarpour

Miguel CARAUCÁN

Miguel Angel CARAUCÁN DÁVILA

The present invention discloses a process for the recovery of betaines from electrodialysis (ED) waste streams, whereby said waste streams are treated with a pressure driven membrane process.

Process for the recovery of betaines from electrodialysis waste stream

The invention relaters to a process for the production of an (S)- or (R)-4-halo-3-hydroxybutyrate, comprising reacting a 4-haloacetoacetate with hydrogen in the presence of a solvent, the solvent being a solvent mixture, which comprises a first solvent and a second solvent, wherein the first solvent is an aliphatic alcohol, preferably methanol, ethanol or propanol, and the second solvent is aprotic and comprises at least one oxygen atom; and

Process for the hydrogenation of ketoesters

Betaines of formula RN-Q-COO(I), wherein R is Calkyl and Q is Calkanediyl, optionally substituted with hydroxy, are prepared in one step by adding an &#x3c9;-halocarboxylate of formula X-Q-COOR' (II), wherein Q is as defined above, R&#x2032; is Clalkyl and X is chlorine, bromine or iodine, to an aqueous solution containing a tertiary amine of formula RN (III), Wherein R is as defined above and a base selected from alkali hydroxides and alkaline earth hydroxides. The process is particularly suited to the production of L-carnitine.

Process for the preparation of betaines

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Visp, Switzerland

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