Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Reexamination Certificate
2005-08-04
2009-06-23
Davis, Brian J (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
Reexamination Certificate
active
07550632
ABSTRACT:
Methods for improving color properties of triethanolamine, and triethanolamine compositions treated thereby, are disclosed, wherein the methods comprise: (a) providing a composition comprising triethanolamine; and (b) contacting the composition with an acid component and a basic component; wherein the acid component comprises an acid selected from the group consisting of phosphorous acid, hypophosphorous acid and mixtures thereof; and wherein the basic component comprises a compound selected from the group consisting of alkali metal hydroxides, alkaline earth metal hydroxides, ammonium hydroxides according to general formula (I), and mixtures thereof:in-line-formulae description="In-line Formulae" end="lead"?[R1R2R3(2-hydroxyethyl)ammonium] hydroxide (I)in-line-formulae description="In-line Formulae" end="tail"?wherein R1, R2and R3each independently represents a C1-30alkyl or a C2-10hydroxyalkyl; with the proviso that where the basic component comprises an alkali metal hydroxide, the molar ratio of acid component: basic component is 1:0.1 to 1:1, and where the basic component comprises an alkaline earth metal hydroxide, the molar ratio of acid component: basic component is 1:0.05 to 1:0.5.
REFERENCES:
patent: 3207790 (1965-09-01), Glew et al.
patent: 3387934 (1968-06-01), Minkiei
patent: 4567303 (1986-01-01), Boettger et al.
patent: 5545757 (1996-08-01), Hammer et al.
patent: 5693866 (1997-12-01), Roling et al.
patent: 6291715 (2001-09-01), Ruider et al.
patent: 6323371 (2001-11-01), Ruider et al.
patent: 6388137 (2002-05-01), Ruider et al.
patent: 0 004 015 (1979-09-01), None
patent: 4 015 (1979-09-01), None
patent: 0 036 152 (1981-09-01), None
patent: 36 152 (1981-09-01), None
patent: 673 920 (1995-09-01), None
patent: 1 081 130 (2001-03-01), None
patent: 1 081 136 (2001-03-01), None
patent: 1 132 371 (2001-09-01), None
patent: WO 00/32553 (2000-06-01), None
patent: WO-00/32553 (2000-06-01), None
Mosher, E. et al., “The Chemical Control of Phosphine Gas Generation During the Machining of Nodular Cast Iron”, Lubrication Engineering 45(7) (1989), pp. 445-450.
Dostalek Roman
Haese Frank
Julius Manfred
Melder Johann-Peter
BASF SE
Connolly Bove & Lodge & Hutz LLP
Davis Brian J
LandOfFree
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