Oxidative delignification of wood pulp or fibers using transitio

Details Oxidative delignification of wood pulp or fibers using transitio Oxidative delignification of wood pulp or fibers using transitio

1997-08-14

1998-10-20

Silverman, Stanley S.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

530506, D21C 300

Patent

active

058241892

ABSTRACT:
A method for delignifying wood pulp and fiber is disclosed. The method comprises the steps of obtaining a wood pulp and exposing the wood pulp to Ta.sub.p (TM ).sub.q X.sub.r O.sub.s !.sup.x- where l is 0-18, m is 0-40, n is 0-40, o is 0-10, p is 0-10, q is 0-9, r is 0-6, TM is a d-electron-containing transition metal ion, and X is a heteroatom, which is a p or d block element, where l+m+n+o+p.gtoreq.4, l+m+q>0 and s is sufficiently large that x>0. The exposure is under conditions wherein the polyoxometalate is reduced. In a preferable form of the invention, the method additionally comprises the step of reoxidizing the polyoxometalate.

REFERENCES:
patent: 2779656 (1957-01-01), Fennel et al.
patent: 3657065 (1972-04-01), Smith et al.
patent: 4283301 (1981-08-01), Diehl
patent: 4486394 (1984-12-01), Nguyen
patent: 4773966 (1988-09-01), Huynh
patent: 4839008 (1989-06-01), Hill
patent: 4864041 (1989-09-01), Hill
patent: 4892941 (1990-01-01), Dolphin et al.
patent: 4931207 (1990-06-01), Cramer et al.
patent: 5041142 (1991-08-01), Ellis
patent: 5077394 (1991-12-01), Dolphin et al.
Venturello et al.; J. Org. Chem.; 51:1599-1602, 1986.
Deutsch et al.; Tappi; 62:53-55, 1979.
Sattari et al.; J. Chem. Soc., Chem. Commun.; 634-635; 1990.
Chambers et al.; Inorg. Chem.; 30:2776-2781, 1991.
Ishii et al.; J. Org. Chem.; 53:3587-3593, 1988.
Ali et al.; J. Chem. Soc., Chem Commun.; 825-826, 1989.
Lyon et al.; J. Am. Chem. Soc.; 113:7209-7221, 1991.
Mansuy et al.; J. Am. Chem. Soc.; 113:7222-7226, 1991.
Chambers et al.; Inorg. Chem.; 28:2509-2511, 1989.
Hill, et al., 108 J. Am. Chem. Soc. 536-538 (1986).
Finke, et al., 26 Inorg. Chem. 3886-3896 (1987).
Khenkin, et al., in The Activation of Dioxygen and Homogeneous Catalytic Oxidation, Barton, et al. (eds.), Plenum Press, New York, p. 463 (1993).
Gomez-Garcia, et al., 32 Inorg. Chem. 3378-3381 (1993).
Tourne, et al., J. Chem. Soc. Dalton Trans., pp. 143-155 (1991).
Creaser, et al., 32 Inorg. Chem. 1573-1578 (1993).
Tourne, et al., 32 J. Inorg. Nucl. Chem. 3875-3890 (1970).
Weinstock, et al., Proc. TAPPI Pulping Conf., pp. 519-532 (Nov. 1993).
Khenkin, et al., Mendeleev Commun., pp. 140-141 (1993).
Smith, et al., Svensk Papperstidning, No. 12, pp. R106-R112 (1985).
Atalla, "The Polyoxometalates: New Bleaching Systems For The 21st Century", Abstract Drafted for Mar. 2, 1994 Talk at TAPPI Annual Meeting.

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