Patent ID: 8252310

Claim:
A process for preparing an iron(III)-based phosphate adsorbent comprising iron(III) oxide-hydroxide, starch and sucrose, said process comprising: (i) reacting an aqueous solution of iron(III) salt with an aqueous base at a pH from between 6 and 10 to form a mixture in which an iron oxide hydroxide precipitate begins to form; (ii) adding starch to the mixture of step i) prior to complete formation of the iron oxide hydroxide precipitate; (iii) allowing complete formation of the iron oxide hydroxide precipitate to occur; (iv) isolating the precipitate formed according to step (iii); (v) suspending the isolated precipitate from step (iv) in an aqueous solution; (vi) adding sucrose and optionally at least one excipient selected from a preservative and a binder; and (vii) fluidized spray drying the solution from step to (vi) to yield an iron(III)-based phosphate adsorbent as a dry powder.