VERFAHREN ZUR HERSTELLUNG VON DIKALIUM-ASKORBAT-2-SULPHAT

The present invention relates to a process for the production of dipotassium-ascorbate-2-sulfate-dihydrate, a vitamin C derivative. It is used, among other things, as an additive to fish feed. In the process according to the process according to the invention, trimethylamine-sulfur-trioxide complex is added in only slight molar excess to a concentrated solution of potassium-L-ascorbate in water, and the pH value of this reaction mixture is set by successive additions of potassium hydroxide at a value in the range between 9.5 and 10.5, and is kept at this value for the duration of the reaction. The process permits the profitable production of dipotassium-ascorbate-2-sulfate-dihydrate on a large industrial scale. It is also explained how trimethylamine-sulfur-trioxide complex can be recovered from trimethylamine which occurs as a by-product during the production of dipotassium-ascorbate-2-sulfate.