Pyrophosphates

Details Pyrophosphates Pyrophosphates

1976-01-16

1978-02-21

Sutto, Anton H.

Chemistry of carbon compounds

Dipeptides, e.g., aspartame, anserine, carnosine, etc.

21 25A, 21 27A, 210 58, 252 85C, 252 855D, 252 855E, 252180, 252181, 260950, 260981, C07F 9165, C02B 506

Patent

active

040752917

ABSTRACT:
Pyrophosphates, containing both oxygen and sulfur, of the formula ##STR1## where X is oxygen or sulfur such as those of the formula ##STR2## where R is other than a lower alkyl group (i.e. containing less than seven carbon atoms) and preferably a higher alkyl (i.e. at least six carbons), phenol, etc., and most preferably an oxyalkylated radical. Pyrophosphates are prepared by reacting P.sub.2 S.sub.5 with the appropriate alcohol and continuing the reaction to convert the O,O-disubstituted dithiophosphoric acid initially formed to the pyrophosphate. The resulting product usually contains the O,O-disubstituted dithiophosphoric acid in addition to the pyrophosphate. The pyrophosphate, or mixture of the pyrophosphate with the O,O-disubstituted dithiophosphoric acid, is particularly useful as a corrosion inhibitor in oxygenated and/or aqueous systems as well as for other uses, etc.

REFERENCES:
patent: 3654170 (1972-04-01), Woodson et al.

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