Unilever Patent Holdings B.v.

Naarden International N.v.

Altenburger Maschinen Kg Jaeckering & Co.

Andras J Wieg

Robert Roos

Alfons L Peters

Adrianus M Van Grinsven

Arnoldus L Boog

Gunther Jackering

The invention provides a process for producing gamma-lactones useful for incorporation in flavorings and fragrances, wherein a micro-organism which is acceptable for making food grade products and which does not metabolize gamma-lactones, is cultured aerobically in a culture medium containing as the substrate a hydroxy fatty acid having an even number 4 of carbon atoms between the carboxyl group and the carbon atom carrying the hydroxy group. The preferred micro-organism is a Saccharomyces cerevisiae, Debaromyces hansenii or Candida boidinii species. The gamma-hydroxy-alkanoic acid reaction product of the process is lactonized either in the fermentation broth or after separation therefrom. Especially suitable are 12-hydroxy fatty acids such as ricinoleic acid. The hydroxy fatty acid may be added either pure or as the mixture obtained by hydrolysis of an ester thereof. Enzymatic hydrolysis of such ester may be done in situ in the fermentation broth.

Process for producing gamma-lactomes

The invention relates to a process for producing methyl-alkyl ketones using micro-organisms which convert fatty acids or their esters into the corresponding methyl ketones having one carbon atom less. Suitable micro-organisms are those which produce at least 0.1% w/w methylketones in the culture broth. Preferred micro-organisms are Aureobasidium pullulans species. The process is especially suitable to produce pentan-2-one, heptan-2-one, nonan-2-one and undecan-2-one or mixtures thereof. The compounds produced are suitable for use in food flavors.

Process for producing alkyl-methyl ketones

A process for the enzymatic streatment of waste water of wheat starch plants in which the waste water is subjected before or alternating with the first steps of the concentration process to a process at least consisting of

Process for the enzymatic treatment of waste water of wheat starch plants

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Amsterdam, Netherlands

Andras J Wieg