Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...
Reexamination Certificate
2004-02-17
2008-10-28
Hruskoci, Peter A. (Department: 1797)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From silicon reactant having at least one...
C252S180000, C526S279000, C528S028000, C528S038000
Reexamination Certificate
active
07442755
ABSTRACT:
Materials and a process are provided whereby polymers with the pendant group or end group containing —Si(OR″)3(where R″ is H, an alkyl group, Na, K, or NH4) are used to control aluminosilicate scaling in a Bayer process. When materials of the present invention are added to the Bayer liquor before the heat exchangers, they reduce and even completely prevent formation of aluminosilicate scale on heat exchanger walls. The present materials are effective at treatment concentrations that make them economically practical.
REFERENCES:
patent: 3408420 (1968-10-01), Wiggill
patent: 3682831 (1972-08-01), Tate
patent: 3729438 (1973-04-01), Plesich et al.
patent: 4010110 (1977-03-01), Cosentino et al.
patent: 4219591 (1980-08-01), Buning et al.
patent: 4344860 (1982-08-01), Plueddemann
patent: 4564456 (1986-01-01), Homan
patent: 4612155 (1986-09-01), Wong et al.
patent: 4775725 (1988-10-01), DePasquale et al.
patent: 5080801 (1992-01-01), Molter et al.
patent: 5082884 (1992-01-01), Filges et al.
patent: 5314626 (1994-05-01), Dimas
patent: 5415782 (1995-05-01), Dimas
patent: 5527431 (1996-06-01), Shetty et al.
patent: 5563184 (1996-10-01), McGee et al.
patent: 5646210 (1997-07-01), Timmerman et al.
patent: 5679261 (1997-10-01), Sivakumar et al.
patent: 5733459 (1998-03-01), Rothenberg et al.
patent: 6086771 (2000-07-01), Selvarajan et al.
patent: 6109350 (2000-08-01), Nguyen et al.
patent: 6814873 (2004-11-01), Spitzer et al.
patent: 11-090488 (1999-04-01), None
patent: WO97/41065 (1997-11-01), None
Database WPI—Section CH, Week 197709 Derwent Publication Ltd., London, GB: An 1977-16031Y XP002262372 & Su 500 290 A (Alum Magn Electr Ind), May 28, 1976 abstract.
V. G. Kazakov et al., “Heating and Evaporation of Silicon-Containing Aluminate Solutions,” Translated from Tsvetnye Mettally, pp. 45-48 (1979).
S. M. Monhot, “Silicate Copolymers for Silica Scale Inhibition,” PPG Industries, Chemical Technical Center, pp. 19-26, (1995).
Heitner Howard I.
Kula Frank
Rothenberg Alan S.
Spitzer Donald P.
Cytec Technology Corp.
Hruskoci Peter A.
Wasserman Fran
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