Process for preparing an iron hydroxide polyisomaltose complex and the resulting product

Claim 1

A PROCESS OF PREPARING AN IRON HYDROXIDE POLYISOMALTOSE COMPLEX CONTAINING ABOUT 32% IRON BY WEIGHT COMPRISING HEATING AN ACID AQUEOUS SOLUTION OF A WATERSOLUBLE DEXTRAN, HAVING AN INTRINSIC VISCOSITY GREATER THAN 0.1 AT 25*C. AND A WATER-SOLUBLE IRON COMPOUND IN RESPECTIVE AMOUNTS OF ABOUT 48 TO ABOUT 141 WEIGHT PARTS OF SAID IRON COMPOUND PER 100 WEIGHT PARTS OF DEXTRAN UNTIL THE INTRINSIC VISCOSITY OF SAID SOLUTION IS NOT MORE THAN 0.1 AT 25*C., REACTING THE RESULTING SOLUTION WITH AN ALKALI CARBONATE AT AN ACID PH WHEREUPON CARBON DIOXIDE IS EVOLVED, ALKALINIZING THE RESULTING SOLUTION WITH AN ALKALI METAL HYDROXIDE AFTER COMPLETION OF THE CARBON DIOXIDE EVOLUTION, AND THEREAFTER HEATUNG THE RESULTING SOLUTION TO FORM SAID COMPLEX.