Dicalcium phosphate dihydrate for fluoride dentifrice compositio

Details Dicalcium phosphate dihydrate for fluoride dentifrice compositio Dicalcium phosphate dihydrate for fluoride dentifrice compositio

1986-04-07

1989-05-09

Schain, Howard E.

Drug, bio-affecting and body treating compositions

Dentifrices

Fluorine or fluorine compound containing

424 57, 423267, 423308, 423309, A61K 718, A61K 716

Patent

active

048288233

ABSTRACT:
The monofluorophosphate compatibility of dicalcium phosphate dihydrate can be improved in processes in which a slaked lime slurry is reacted with phosphoric acid to form a monocalcium phosphate solution to which is added magnesium oxide, additional lime slurry and pyrophosphoric acid with later removal of the dicalcium phosphate dihydrate. The improvement involved adding the magnesium oxide at 0.3%-2% and adding 0.1%--less than 0.5% of trimagnesium phosphate to the recovered dicalcium phosphate dihydrate.

REFERENCES:
patent: 4244931 (1981-01-01), Jarvis et al.
patent: 4312843 (1982-01-01), Monty et al.
patent: 4472365 (1984-09-01), Michel

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