Polymeric flocculant and method of sludge dehydration

Details Polymeric flocculant and method of sludge dehydration Polymeric flocculant and method of sludge dehydration

2005-03-29

2005-03-29

Seidleck, James J. (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S162000, C525S258000, C525S260000, C526S219600, C526S219500, C524S555000, C524S801000

Reexamination Certificate

active

06872779

ABSTRACT:
The invention provides a flocculant which in sludge dewatering gives flocs having an excellent balance among flocculating strength, filtration rate and moisture content, and a method of sludge dewatering with the flocculant.Namely, the flocculant is a polymeric flocculent which contains a copolymer having alkoxyalkyl units or a poly(alkylene oxide) unit and further having water-soluble monomer units; and the method of sludge dewatering includes adding the polymeric flocculant to a sludge after or without adding an inorganic flocculent or an organic cationic compound thereto and then dewatering the sludge.

REFERENCES:
patent: 4960465 (1990-10-01), Arfaei
patent: 4981936 (1991-01-01), Good et al.
patent: 5182331 (1993-01-01), Liao et al.
patent: 5886109 (1999-03-01), Kitano et al.
patent: 23 13 189 (1973-09-01), None
patent: 0 469 196 (1992-02-01), None
patent: 42-1729 (1967-01-01), None
patent: 49-41281 (1974-04-01), None
patent: 58-51998 (1983-03-01), None
patent: 59-16599 (1984-01-01), None
patent: 63-158200 (1988-07-01), None
patent: 9-1192 (1997-01-01), None
patent: 11-156400 (1999-06-01), None
patent: WO 9946207 (1999-09-01), None
Th. F. Tadros, et al. “Application of Depletion Flocculation for Prevention of Formation of Dilatant Sediments.” Colloids and Surfaces. vol. 43. Pp. 105-116, 1990.
XP-002270397, Xiao Huining et al, “Novel non-ionic polymeric flocculants for mechanical pulps: An overview”, Proceedings of the 1997 11thFundmental Research Symposium, Part2, Cambridge, UK (Sep. 1997) (abstract only—1 page).
XP-002270395. R. Walz et al., “Monomeric and Polymeric Azoinitiators”, Makromol. Chem. 178, pp. 2527-2534 (1977).
XP-002270396, Jadwiga Matuszewska-Czerwik et al., “Template photopolymerization of methacrylic acid-III. Determination of the rate constants ratio kt/kp for elementary processes”, European Polym. J., vol. 27, No. 8, pp. 743-746 (1991).
XP-002270398,—abstract of JP 11-156400 (Kurita Water Ind. Ltd.)—(abstract only-1 pg.).
XP-000802360, Shogo Nishi et al., “Basic Fibroblast Growth Factor Impregnated Hydrogel Microspheres for Embolization of Cerebral Arteriovenous Malformations”, ASA10 Journal 1998, pp. M405-M410.
XP-009025927, Akira Ueda et al., “Block Copolymers Derived from Azobiscyanopentanoic Acid. V. Block Copolymerization Initiated with a Polyethylene Glycol Containing Scissile Azo Linkages in its Main Chain”, Journal of Polymer Science, vol. 25, pp. 3495-3498 (1987).
European Search Report dated Mar. 10, 2004 for Application No. EP 00 98 5802.

Affiliated with

Also associated with

Rating

Polymeric flocculant and method of sludge dehydration does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polymeric flocculant and method of sludge dehydration, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polymeric flocculant and method of sludge dehydration will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3377425