Patents Represented by Attorney John B. Premo

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  • Reaction of .alpha.-phosphorus containing carboxylic acids with phosphorous acid to prepare scale and corrosion inhibitors
    Patent number: 4138431
    Abstract: Novel compounds and the use of these compounds in inhibiting corrosion and scale in open cooling systems containing ferrous materials which are: ##STR1## These compounds are prepared by a carboxylic acid-phosphonic acid interchange in the general reaction involving .alpha.-phosphorous containing carboxylic acids as reactants:--P--CH.sub.2 CO.sub.2 H .fwdarw. --P--CH.sub.2 PO.sub.3 H.sub.2these compounds show activity in scale and corrosion inhibition in open air cooling systems.
    Type: Grant
    Filed: June 29, 1978
    Date of Patent: February 6, 1979
    Assignee: Nalco Chemical Company
    Inventors: Donald G. Ries, Joseph P. Maniscalco