Liquid purification or separation – Processes – Chemical treatment
Reissue Patent
2006-03-21
2006-03-21
Hruskoci, Peter A. (Department: 1724)
Liquid purification or separation
Processes
Chemical treatment
C162S161000, C210S754000, C210S756000, C210S764000
Reissue Patent
active
RE039021
ABSTRACT:
Free halogen sources (e.g., sodium hypochlorite and chlorine) added as slimicides in high organic component process streams such as pulp and paper processing are rendered more efficacious by the addition of selected N-hydrogen compounds (namely, 5,5-dimethylhydantoin, 5-ethyl-5-methylhydantoin, cyanuric acid, succinimide, urea, 4,4-dimethyl-2-oxazolidinone, and glycouril) to the process stream. The latter compounds may be added to the process stream before or after the slimicide is added or combined with the slimicide and added directly thereto. The direct use of halogenated hydantoins has also been found to provide improved efficacy relative to free halogen sources. In addition, absorbable organic halogen by-products are reduced.
REFERENCES:
patent: 3328294 (1967-06-01), Self et al.
patent: 3749672 (1973-07-01), Golton et al.
patent: 4297224 (1981-10-01), Macchiarolo et al.
patent: 4427692 (1984-01-01), Girard
patent: 4537697 (1985-08-01), Girard
patent: 4698165 (1987-10-01), Theyson
patent: 4925866 (1990-05-01), Smith
patent: 5565109 (1996-10-01), Sweeny
patent: 5976386 (1999-11-01), Barak
patent: 6132628 (2000-10-01), Barak
patent: 1358617 (1974-07-01), None
patent: 56-31492 (1981-03-01), None
patent: WO 96/10541 (1996-04-01), None
Chemical Abstract No. 30168q, 1990.
Feb. 28, 1997, Label for Lonza, Inc.'s DANTOBROM, EPA Reg. No. 6836-117.
Feb. 28, 1997, Label for Lonza, Inc.'s DANTOBROM, EPA Reg. No. 6836-115.
Feb. 1, 1982, 1982 Annual Meeting of Cooling Tower Institute Article, (Matson).
Darby & Darby
Hruskoci Peter A.
Lonza Inc.
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