Method for preparation of i-inositol

Claim 1

A PROCESS FOR MANUFACTURING I-INOSITOL FROM GRAINS CONTAINING I-INOSITOL PHOSPHATE SALTS, COMPRISING: EXTRACTING SAID GRAINS WITH 0.2 TO 10 WEIGHT PERCENT OF AN INORGANIC ACIDIC AQUEOUS SOLUTION, AT A TEMPERATURE OF 5-70* C. FOR A PERIOD OF TIME OF 1-100 MINUTES TO PROVIDE AN ACIDIC EXTRACT, SEPARATING SAID EXTRACT AND PRECIPITATING I-INOSITOL PHOSPHATE SALTS CONTAINED THEREBY BY RAISING THE PH TO AT LEAST 7 WITH THE ADDITION OF AN ALKALINE SUBSTANCE, SEPARATING SAID PRECIPITATE AND SUBJECTING IT TO A TEMPERATURE OF FROM 100 TO 300*C. AND PRESSURE IN THE PRESENCE OF AN ALKALINE EARTH METAL CARBONATE FOR AT LEAST ONE HOUR TO HYDROLYZE THE I-INOSITOL PHOSPHATE SALTS CONTAINED THEREBY AND FROM A HYDROLYZLTE LIQUOR HAVING A PH BWTWEN 7 AND 9, THEREAFTER DESALTING SAID HYDROLYZATE LIQUOR TO FORM INSOLUBLE INORGANIC PHOSPHATES, SEPARATING SAID INSOLUBLE INORGANIC PHOSPHATES AND CONCENTRATING THE RESULTING LIQUOR TO OBTAIN I-INOSITOL.