Process for the preparation of diphosphonic acids

Details Process for the preparation of diphosphonic acids Process for the preparation of diphosphonic acids

1985-10-11

1987-11-10

Evans, J. E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2605024A, C07F 938

Patent

active

047056517

ABSTRACT:
The invention concerns a process for the preparation of diphosphonic acids starting from carboxylic acids, a phosphorus trihalide and orthophosphorous acid, without solvents, using particular molar ratios and conditions so as to keep the reaction mixture fluid and carrying out the hydrolysis only with boiling water.

REFERENCES:
patent: 3366677 (1968-01-01), Quimby
patent: 4054598 (1977-10-01), Blum et al.
patent: 4060546 (1977-11-01), Blaser et al.
patent: 4267108 (1981-05-01), Blum et al.
patent: 4304734 (1981-12-01), Jary et al.

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