Purac Biochem Bv

Agustin Cerdà Baró

Jan Van Breugel

André Banier De Haan

Peter Paul Jansen

Willem Jacob Groot

Paulus Loduvicus Johannes Van Der Weide

José Maria Vidal Lancis

The invention provides a method for preparing a carboxylic acid, which method includes the steps of providing magnesium carboxylate, wherein the carboxylic acid corresponding with the carboxylate has a solubility in water at 20&#xb0; C. of 80 g/100 g water or less; acidifying the magnesium carboxylate with HCl, thereby obtaining a solution comprising carboxylic acid and magnesium chloride (MgCl); optionally a concentration step, wherein the solution comprising carboxylic acid and MgClis concentrated; precipitating the carboxylic acid from the solution comprising the carboxylic acid and MgCl, thereby obtaining a carboxylic acid precipitate and a MgClsolution.

Acid/salt separation

A method for preparing a carboxylic acid by acidification of a liquid feed including a carboxylate salt, which method includes the steps of providing a liquid feed including magnesium carboxylate; providing a gas feed including gaseous hydrogen chloride; and acidifying the carboxylate to carboxylic acid by bringing the liquid feed into contact with the gas feed, thereby forming a liquid effluent including carboxylic acid and magnesium chloride, wherein the gas feed including gaseous hydrogen chloride is derived from a thermal decomposition step wherein an aqueous liquid including magnesium chloride is subjected to a temperature of at least 300&#xb0; C., thereby decomposing magnesium chloride into magnesium oxide and hydrogen chloride, thus obtaining a solid including magnesium oxide and a gas comprising gaseous hydrogen chloride.

Carboxylate acidification

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Cerdanyola Valles, Spain

Agustin Cerdà Baró