Preparation of adenosinetriphosphoric acid and its salt

Claim 1

IN A PROCESS FOR PREPARING A PURE ADENOSINETRIPHOSPHATE FROM ADENOSINE THROUGH PHOSPHORYLATION THEREOF WITH AN INORGANIC PHOSPHATE IN THE PRESENCE OF FERMENTING YEAST, SEPARATION OF THE PHOSPHORYLATED ADENOSINE PRODUCTS THROUGH THE INSOLUBLE ALKALINE EARTH SALTS THEREOF, AND CONVERSION OF THESE INSOLUBLE ALKALINE EARTH SALTS TO ADENOSINEPOLYPHOSPHORIC ACIDS CONTAINING HEAVY METAL IMPURITIES, THE IMPROVEMENTS COMPRISING (1) CONCENTRATING ADENOSINDTRIPHOSPHATE BY PRECIPITATING IT FROM AN AQUEOUS SOLTUION OF SAID ADENOSINEPOLYPHOSPHORIC ACIDS AT A PH OF 1 TO 2 IN THE FORM OF ITS SILVER SALT BY REACTING SAID ACIDS WITH SILVER NITRATE, THEREBY SEPING SAID SALT ITH SODIUM CHLORIDE, THEREBY SEPARATING THE SILVER IN THE FORM OF ITS CHLORIDE, AND RECOVERING SODIUM ADENOSINETRIPHOSPHATE THEREFROM, AND (2) DISSOLVING A SODIUM ADENOSINETRIPHOSPHATE CONTAINING HEAVY METAL IMPURITIES IN A SODIUM PHOSPHATE BUFFLER SOLUTION AT A MOLAR CONCENTRATION BETWEEN 0.2 AND 0.8 AND AT A PH OF 8.5 TO 11, PRECIPITATING IN SAID BUFFLER SOLUTION SAID HEAVY METAL IMPURITIES, SEPARATING THE PRECIPITATE CONTAINING SAID IMPURITIES FROM THE SOLUTION, ACIDIFYING AND RECOVERING ADENOSINETRIPHOSPHORIC ACID FROM THE SOLUTION FREE OF SAID IMPURITIES.