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AssigneeShowa Denko K.K.
InventorsKazuhiro Oomori, Yuji Kobayashi, Takamitsu Utsukihara, Sumio Soya
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A high-purity L-ascorbic acid-2-phosphoric acid potassium crystal having excellent stability, and a method for simply producing the high-purity L-ascorbic acid-2-phosphoric acid potassium in a high yield by adding dropwise a solution containing L-ascorbic acid-2-phosphoric potassium to methanol or simultaneously mixing methanol and a solution containing L-ascorbic acid-2-phosphoric acid potassium. By the production method of the present invention, high-purity L-ascorbic acid-2-phosphoric acid potassium crystal having excellent stability can be simply produced in a high yield. The L-ascorbic acid-2-phosphoric acid potassium crystal obtained by the production method of the present invention is used for feedstuff, cosmetic materials, medical products, food additive and the like.
A method for producing an L-ascorbic acid-2-phosphoric acid potassium crystal, comprising adding a solution containing an L-ascorbic acid-2-phosphoric acid potassium to methanol or simultaneously mixing methanol and a solution containing an L-ascorbic acid-2-phosphoric acid potassium, such that methanol accounts for 30% (V/V) or more of the total of said solution and methanol and thereby L-ascorbic acid-2-phosphoic acid potassium is crystallized.
Dependencies are inferred from the claim text.