Chemical apparatus and process disinfecting – deodorizing – preser – Process disinfecting – preserving – deodorizing – or sterilizing – Maintaining environment nondestructive to metal
Patent
1989-12-15
1991-05-28
Warden, Robert J.
Chemical apparatus and process disinfecting, deodorizing, preser
Process disinfecting, preserving, deodorizing, or sterilizing
Maintaining environment nondestructive to metal
252 8555, 252387, 252388, 2523891, C23F 1108
Patent
active
050193430
ABSTRACT:
This invention relates to a method for preventing corrosion and inhibiting the formation of scale deposition in aqueous systems. More specifically, it relates to using certain calcium insensitive phosphonomethyl amine compounds having the formula: ##STR1## wherein either R.sub.1 is selected from hydrogen, hydrocarbyl, hydroxy-substituted hydrocarbyl, alkoxy-substituted hydrocarbyl; and R.sub.2 is selected from hydrocarbyl, hydroxy-substituted hydrocarbyl, alkoxy-substituted hydrocarbyl, carboxyl-substituted hydrocarbyl, --CH.sub.2 PO.sub.3 H.sub.2, and --C.sub.2 H.sub.4 N(CH.sub.2 PO.sub.3 H.sub.2).sub.2 ; or R.sub.1 and R.sub.2 together form an alicyclic ring having 3 to 5 carbon atoms, optionally along with oxygen atoms, phosphorus atoms or both oxygen and phosphorus atoms in the ring, and water soluble salts thereof.
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Gaudette Roger R.
Hwa Chih M.
Kelly John A.
Neton Janet
Scanlon Patricia M.
Barr James P.
Collins Laura E.
W. R. Grace & Co.,-Conn.
Warden Robert J.
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