Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Treatment with particular chemical
Reexamination Certificate
2011-08-02
2011-08-02
Daniels, Matthew J (Department: 1741)
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Treatment with particular chemical
C162S005000, C162S078000, C210S698000, C210S700000, C252S180000, C525S206000
Reexamination Certificate
active
07988821
ABSTRACT:
The invention relates to a process for the treatment of a fibre material comprising the step of contacting the fibre material in an aqueous medium with a chelating agent and a polymer having following general formulawhereinR1is a hydrogen atom or an alkyl group containing 1 to 12 carbon atoms,R2is —COOM or —CH2COOM,M is a hydrogen atom, an alkali metal ion, an alkaline earth metal ion, an ammonium ion or a mixture thereof,n, m and k are molar ratios of corresponding monomers, wherein n is 0 to 0.95, m is 0.05 to 0.9, and k is 0 to 0.8, and (n+m+k) equals 1, andthe weight average molecular weight is between 500 and 20,000,000 g/mol.The invention also relates to a composition comprising a chelating agent and the above polymer.
REFERENCES:
patent: 4363699 (1982-12-01), DeCeuster et al.
patent: 4963157 (1990-10-01), Machida et al.
patent: 5135677 (1992-08-01), Yamaguchi et al.
patent: 5658429 (1997-08-01), Andersson et al.
patent: 5760150 (1998-06-01), Bachus
patent: 6780832 (2004-08-01), Maeda et al.
patent: 2441841 (2004-03-01), None
patent: 3423452 (1986-01-01), None
patent: 0814193 (1997-12-01), None
patent: 9011403 (1990-10-01), None
patent: 2005108673 (2005-11-01), None
Finnish Application No. 20040293; Search Report.
International Application No. PCT/FI2005/000113; Search Report.
JP 01-266295; Publication Date: Oct. 24, 1989 (translation of abstract only).
JP 01-148890; Publication Date: Jun. 12, 1989 (translation of abstract only).
JP 60-231876; Publication Date: Nov. 18, 1985 (translation of abstract only).
DE 3423452; Publication Date: Jan. 2, 1986 (translation of abstract only).
JP1266295; Oct. 24, 1989; Machine Translation (8 pages).
FI20040293; Sep. 29, 2004; Search Report (1 page).
International Search Report; International Application No. PCT/FI2005/000211; Date of actual completion of the International Search Sep. 12, 2005; Date of mailing of the International Search Report Sep. 23, 2005 (3 pages).
Ahlgren Jonni
Jäkärä Jukka
Lee Seung-Hoon
Paren Aarto
Rautiainen Jukka
Cantor & Colburn LLP
Daniels Matthew J
Kemira Oyj
Minskey Jacob Thomas
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