Silica-based sols and their production and use

Details Silica-based sols and their production and use Silica-based sols and their production and use

2005-04-07

2010-06-08

Kugel, Timothy J. (Department: 1796)

Colloid systems and wetting agents; subcombinations thereof; pro

Continuous liquid or supercritical phase: colloid systems;...

Aqueous continuous liquid phase and discontinuous phase...

C516S080000, C516S079000, C516S928000

Reexamination Certificate

active

07732495

ABSTRACT:
The invention relates to a process for producing aqueous silica-based sols which comprises providing a cationic ion exchange resin having at least part of its ion exchange capacity in hydrogen form; bringing said ion exchange resin in contact with an aqueous alkali metal silicate to form an aqueous slurry; adjusting the pH of the aqueous slurry and separating the ion exchange resin from the aqueous slurry, as well as the silica-based sols obtained by the process.The invention also relates to silica-based sols obtained by the process, as well as a process for producing paper which comprises providing an aqueous suspension comprising cellulosic fibres; adding to the suspension one or more drainage and retention aids comprising a silica-based sol according to the invention; and dewatering the obtained suspension to provide a sheet or web of paper.

REFERENCES:
patent: 2577485 (1951-12-01), Rule
patent: 2601352 (1952-06-01), Wolter
patent: 2630410 (1953-03-01), Clapsadle et al.
patent: 2727008 (1955-12-01), Iler
patent: 2750345 (1956-06-01), Alexander
patent: 2754270 (1956-07-01), Kimberlin et al.
patent: 2892797 (1959-06-01), Alexander et al.
patent: 2974108 (1961-03-01), Alexander
patent: 3083167 (1963-03-01), Shannon
patent: 3374180 (1968-03-01), Marotta
patent: 3533816 (1970-10-01), Oken
patent: 3655578 (1972-04-01), Yates
patent: 3857925 (1974-12-01), Sirianni et al.
patent: 3916058 (1975-10-01), Vossos
patent: 3956171 (1976-05-01), Moore, Jr. et al.
patent: 4272409 (1981-06-01), Bergna
patent: 4388150 (1983-06-01), Sunden et al.
patent: 4750974 (1988-06-01), Johnson
patent: 4927498 (1990-05-01), Rushmere
patent: 4954220 (1990-09-01), Rushmere
patent: 5100581 (1992-03-01), Watanabe et al.
patent: 5127994 (1992-07-01), Johansson
patent: 5176891 (1993-01-01), Rushmere
patent: 5230833 (1993-07-01), Romberger et al.
patent: 5240561 (1993-08-01), Kaliski
patent: 5279807 (1994-01-01), Moffett et al.
patent: 5368833 (1994-11-01), Johansson et al.
patent: 5447604 (1995-09-01), Johansson et al.
patent: 5470435 (1995-11-01), Rushmere et al.
patent: 5482693 (1996-01-01), Rushmere et al.
patent: 5503820 (1996-04-01), Moffett et al.
patent: 5543014 (1996-08-01), Rushmere et al.
patent: 5571494 (1996-11-01), Saastamoinen
patent: 5603805 (1997-02-01), Andersson et al.
patent: 5626721 (1997-05-01), Rushmere et al.
patent: 5707494 (1998-01-01), Rushmere et al.
patent: 5708069 (1998-01-01), Burns et al.
patent: 5846384 (1998-12-01), Schöld et al.
patent: 5964693 (1999-10-01), Brekau et al.
patent: 6083997 (2000-07-01), Begala et al.
patent: 6228217 (2001-05-01), Dickerson et al.
patent: 6372089 (2002-04-01), Keiser et al.
patent: 6372806 (2002-04-01), Keiser et al.
patent: 6379500 (2002-04-01), Greenwood et al.
patent: 2002/0139502 (2002-10-01), Hallstrom et al.
patent: 2003/0024671 (2003-02-01), Persson et al.
patent: 549541 (1977-03-01), None
patent: 1446106 (1988-12-01), None
patent: WO 86/00100 (1986-01-01), None
patent: WO 86/05826 (1986-10-01), None
patent: WO 89/08741 (1989-09-01), None
patent: WO 93/24409 (1993-12-01), None
patent: WO 94/05597 (1994-03-01), None
patent: WO 95/23021 (1995-08-01), None
patent: WO 98/56715 (1998-12-01), None
patent: WO 98/56716 (1998-12-01), None
patent: WO 00/66491 (2000-11-01), None
patent: WO 00/66492 (2000-11-01), None
R. K. Iler and R. L. Dalton, “Degree of Hydration of Particles of Colloidal Silica in Aqueous Solution,” Grasselli Chemicals Department and E. I. Du Pont de Nemours and Co. Inc., Jan 16, 1956, vol. 60, pp. 955-957.
George W. Sears Jr., “Determination of Specific Surface Area of Colloidal Silica by Titration with Sodium Hydroxide,” Grasselli Chemicals Department and E. I. Du Pont de Nemours & Co., Inc., Dec. 12, 1956, vol. 28, pp. 1981-1983.
European Search Report EP 04 44 5049 dated Aug. 25, 2004.
Derwent abstract No. 008026336 abstracting SU 1446106 A1.
English language translation of SU 1446106 A1 (6 pages).
Moffett, Robert H., “On-site production of a silica-based microparticulate retention and drainage aid,” Tappi Journal, vol. 77, No. 12, pp. 133-138.
V. Rieman, et al., “Ion-exchange chromatography in analytical chemistry,” Moscow, Mir Publishing House, 1973, pp. 86-88.

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