Purac Biochem Bv

Adriaan Dirk Kon

André Banier De Haan

Paulus Loduvicus Johannes Van Der Weide

Lucien Henri Leander Jozef De Koninck

Jan Van Breugel

Jan Van Krieken

Peter Paul Jansen

Diana Visser

Arne Olav Sliekers

Jose Maria Vidal Lancis

Tanja Ðekic Zivkovic

José María Vidal Lancis

Tanja Dekic Zivkovic

Frederik Gerrit Jan Kool

Tanja Ðekic Živkovic

Tanja ÐEkic ?Ivkovic

Tanja ÐEkic Zivkovic

The invention pertains to a method for preparing succinic acid which comprises providing an aqueous magnesium succinate solution to an acidification step, wherein the magnesium succinate solution is acidified by the addition of hydrogen chloride, thereby obtaining an aqueous solution comprising succinic acid and magnesium chloride and subjecting the aqueous solution comprising succinic acid and magnesium chloride derived from the acidification step to a treatment step with active carbon followed by precipitating succinic acid from an aqueous mixture comprising succinic acid and magnesium chloride resulting from the active carbon treatment step in a precipitation step to form solid succinic acid. It has been found that the method according to the invention leads to succinic acid crystals with better properties than a comparable method wherein no active carbon treatment is used.

Method for manufacturing succinic acid

A method for manufacturing a mixed solution comprising propionate and acetate includes adding acid to a fermentation product to obtain an acidified fermentation product comprising propionate and acetate with a pH in the range of 2.5 to 8. The method optionally includes removing carbonate-related compounds from the mixed solution.

Method for manufacturing a mixed solution of propionate and acetate

The invention is directed to a method for recovering carboyxlic acid from an magnesium carboxylate containing aqueous mixture, including the steps of: contacting the aqueous mixture with an acidic ion exchanger, thereby forming a carboxylic acid mixture and an ion exchanger loaded with magnesium ions; contacting the ion exchanger loaded with magnesium ions with a hydrochloric acid solution, thereby forming a magnesium chloride solution; and thermally decomposing the magnesium chloride solution at a temperature of at least 300&#xb0; C., thereby forming magnesium oxide (MgO) and hydrogen chloride (HCl).

Carboxylic acid recovery from magnesium carboxylate mixture

The present invention pertains to a fermentation process for the production of an organic acid salt including the steps of fermenting a microorganism in a fermentation medium in a fermentation reactor to form a fermentation broth having an organic acid salt, wherein part of the organic acid salt is present in the solid state and part of the organic acid salt is dissolved in the fermentation broth; withdrawing at least part of the fermentation broth from the fermentation reactor, providing the broth to a hydrocyclone, and withdrawing a top effluent and a bottom effluent from the hydrocyclone; providing the bottom effluent from the hydrocyclone to a solid/liquid separation step, to form a solid fraction and a liquid fraction, providing at least 30 vol. % of the total of the top effluent from the hydrocyclone and the liquid fraction from the solid-liquid separation step to the fermentation reactor.

Fermentation process

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Meerkerk, Netherlands

Adriaan Dirk Kon