Compositions – Water-softening or purifying or scale-inhibiting agents – Plant or organic material containing
Reexamination Certificate
2005-07-12
2005-07-12
Hruskoci, Peter A. (Department: 1724)
Compositions
Water-softening or purifying or scale-inhibiting agents
Plant or organic material containing
C210S666000, C210S716000, C210S728000
Reexamination Certificate
active
06916431
ABSTRACT:
The invention concerns, among other things, a precipitating chemical for separating preferably hydrocarbons from water, but also for separating other dissolved and/or suspended organic and/or inorganic substances and particles in an associated liquid, including mineral and/or rock particles, heavy metals, salts, phosphorous compounds, alcohols, lipids, aromatics and cellulose. The precipitating chemical is composed of bentonite, preferably sodium montmorillonite; of polymer, preferably of the polyacrylamide type; of sodium polyphosphate and/or lignite; and of water. The chemical is added to and mixed with waste liquid, after which chemical precipitation is activated through the addition of acid or base until the pH-value of the liquid mixture is 4.0 or less, or the pH-value being 8.0 or more. The liquid mixture then rests until the contaminant(s) flakes and separates from the liquid phase of the mixture and is then deposited or floated from the liquid mixture. Said precipitating chemical is generally more simple to use, easier to produce and more efficient for purification and covers more different conditions of operational contamination than correspondingly in known technique.
REFERENCES:
patent: 3617561 (1971-11-01), Fanselow
patent: 3997439 (1976-12-01), Ayukawa
patent: 4353803 (1982-10-01), Dover, Jr.
patent: 4415467 (1983-11-01), Piepho
patent: 4765908 (1988-08-01), Monick et al.
patent: 4980025 (1990-12-01), Andersson et al.
patent: 5204007 (1993-04-01), Mosley et al.
patent: 5320773 (1994-06-01), Perman et al.
patent: 6132625 (2000-10-01), Moffett
patent: 42 00 479 (1992-07-01), None
patent: 42 23 285 (1994-01-01), None
patent: 2 679 546 (1993-01-01), None
patent: 56-158194 (1981-12-01), None
patent: 501 216 (1994-12-01), None
patent: WO-98/57888 (1998-12-01), None
Demel, I. et al., Improving the Settling of Activated Sludge by Chemical Additives, Wat. Sci. Tech. vol. 20, No. 1, pp. 283-286, 1988, Great Britain.
Demel, I. et al., Möglichkeiten Zur Leistungssteigerung Biologischer Abwasserreinigungsanlagen Von Zellstoff-Fabriken Durch Physikalisch-Chemische Massnahmen Vor Und Nach Der Biologischen Reinigung, Wochenblatt Für Papierfabrikation 5, pp. 179-188, 1990.
Akerman & Senterfitt
Hruskoci Peter A.
Nature Technology Solution AS
LandOfFree
Precipitating chemical does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Precipitating chemical, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Precipitating chemical will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3372297