Compositions – Preservative agents – Anti-corrosion
Patent
1989-09-19
1991-12-17
Kyle, Deborah L.
Compositions
Preservative agents
Anti-corrosion
558104, 558180, 560180, 560190, 560145, 560130, 422 15, 422 17, 210699, C23F 1110
Patent
active
050732994
ABSTRACT:
Compounds having the formula I: ##STR1## wherein M.sub.1, M.sub.2, M.sub.3 , independently, are hydrogen, C.sub.1 -C.sub.4 alkkyl, phenyl, a monovalent or an equivalent of a polyvalent metal atom, ammonium or a substituted ammonium ion; R.sub.1 is C.sub.1 -C.sub.4 alkyl substituted by one or more hydroxy or carboxyl groups; and p is an integer.
The new compounds are useful in the treatment of aqueous systems, in particular to inhibit scale deposition from aqueous systems.
REFERENCES:
patent: 2971019 (1961-02-01), Ladd et al.
patent: 3048613 (1962-08-01), Ladd et al.
patent: 4046707 (1977-09-01), Smith et al.
patent: 4105551 (1978-08-01), Smith et al.
patent: 4127483 (1978-11-01), Smith et al.
patent: 4159946 (1979-07-01), Smith et al.
B. E. Ivanor et al., Z. Obsch. Khim. 49, 1768 (1979).
Japanese 59-98150 (Patent Abst.).
Japanese 60-11566 (Patent Abst.).
Ciba-Geigy Corporation
Fee Valerie
Hall Luther A. R.
Kyle Deborah L.
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