Purac Biochem Bv

Jose Maria Vidal Lancis

Jan Van Breugel

Hendrik Martinus Winkelaar

Margarita Camprubi Vila

Peter Paul Jansen

Tanja Dekic Zivkovic

Adriaan Dirk Kon

Gerard Hendrik Van Bochove

The invention pertains to a method for providing a succinic acid solution, comprising the steps of &#x2014;providing a first magnesium succinate containing medium with a magnesium succinate concentration of 18-23 wt. % to a first acidification reactor where it is contacted with hydrogen chloride to form a solution of succinic acid, magnesium chloride and hydrogen chloride, &#x2014;providing a second magnesium succinate containing medium with a magnesium succinate concentration of 25-50 wt. %, and contacting it in a second acidification reactor with the solution of succinic acid, magnesium chloride and hydrogen chloride withdrawn from the first acidification reactor, to form an aqueous mixture comprising magnesium chloride and succinic acid with a succinic acid concentration of at least 18 wt. %. The method according to the invention makes it possible to obtain a solution comprising succinic acid and magnesium 20 chloride with an increased succinic acid concentration.

Method for providing a succinic acid solution

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

The invention relates to a method and a device for the purification of an aqueous solution of an organic acid having a boiling point at atmospheric pressure of less than 450&#xb0; C., which further has approximately 275 g carboxylate ions/l or less, preferably 250 g carboxylate ions/l or less, and preferably less than 1% by weight ionic impurities, calculated on the basis of the total solution. In particular, the invention relates to a method and a device for the continuous purification and concentration, on an industrial scale, of an aqueous solution of an organic acid having a boiling point at atmospheric pressure of less than 450&#xb0; C. According to the method, this solution is subjected to two or more distillation steps, the first distillation step being carried out at a temperature of from 80&#xb0; to 150&#xb0; C. and a pressure of from 50 to 250 mbar, and the second distillation step being carried out at a temperature of from 80&#xb0; to 200&#xb0; C. and a pressure of from 0.01 to 50 mbar.

Purification of aqueous solutions of organic acids

The invention relates to a method and a device for the purification of an aqueous solution of an organic acid having a boiling point at atmospheric pressure of less than 450&#xb0; C., which-further has approximately 275 g carboxylate ions/1 or less, preferably 250 g carboxylate ions/1 or less, and preferably less than 1% by weight ionic impurities, calculated on the basis of the total solution. In particular, the invention relates to a method and a device for the continuous purification and concentration, on an industrial scale, of an aqueous solution of an organic acid having a boiling point at atmospheric pressure of less than 450&#xb0; C. According to the method, this solution is subjected to two or more distillation steps, the first distillation step being carried out at a temperature of from 80&#xb0; to 150&#xb0; C. and a pressure of from 50 to 250 mbar, and the second distillation step being carried out at a temperature of from 80&#xb0; to 200&#xb0; C. and a pressure of from 0.01 to 50 mbar.

The invention relates to a method and a device for the purification of an aqueous solution of an organic acid having a boiling point at atmospheric pressure of less than 450&#xb0; C., which further has approximately 275 g carboxylate ions/1 or less, preferably 250 g carboxylate ions/1 or less, and preferably less than 1% by weight ionic impurities, calculated on the basis of the total solution. In particular, the invention relates to a method and a device for the continuous purification and concentration, on an industrial scale, of an aqueous solution of an organic acid having a boiling point at atmospheric pressure of less than 450&#xb0; C. According to the method, this solution is subjected to two or more distillation steps, the first distillation step being carried out at a temperature of from 80&#xb0; to 150&#xb0; C. and a pressure of from 50 to 250 mbar, and the second distillation step being carried out at a temperature of from 80&#xb0; to 200&#xb0; C. and a pressure of from 0.01 to 50 mbar.

Growing community of inventors

Vilassar de Mar, Spain

Jose Maria Vidal Lancis