Compositions – Reductive bleachant – deoxidant – reductant – or generative – Deoxidant or oxygen scavenging
Patent
1991-10-11
1992-11-17
Stoll, Robert L.
Compositions
Reductive bleachant, deoxidant, reductant, or generative
Deoxidant or oxygen scavenging
252387, 25238962, 252390, 252392, 422 16, 422 17, 562437, 564282, 564290, 564306, C23F 1112, C23F 1114
Patent
active
051641100
ABSTRACT:
New oxygen scavengers for boiler waters have been discovered, which oxygen scavengers are based upon N,N,N',N'-tetra substituted phenylenediamines. These compounds provide oxygen scavenging capabilities, metal passivating capabilities, volatility such that condensate systems in an operating boiler are protected, and may be formulated with other oxygen scavengers and other common treatment agents used in boiler waters.
The preferred tetra substituted phenylenediamines are N,N,N',N'-tetramethyl-1,4-phenylenediamines, or its precursors.
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Haraer Scott R.
Pierce Claudia C.
Soderquist Cynthia A.
Drake James J.
Epple Donald G.
Fee Valerie
Miller Robert A.
Nalco Chemical Company
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