System and method of wet oxidation of a viscose process stream

Details System and method of wet oxidation of a viscose process stream System and method of wet oxidation of a viscose process stream

2004-10-29

2010-12-14

Johnson, Christina (Department: 1791)

Paper making and fiber liberation

Processes and products

Synthetic fiber

C162S036000, C162S030100

Reexamination Certificate

active

07850822

ABSTRACT:
A wet oxidation process is used to control the concentration of reduced sulfur compounds from a viscose process. The wet oxidation process oxidizes the reduced sulfur compounds to convert such reduced sulfur compounds to an alkali sulfate and/or thiosulfate species. The alkali sulfate stream is recycled to the viscose process. Oxidation is performed under elevated temperature and pressure conditions such that the offgas has an oxygen concentration of between about 2% to 18% and the alkali sulfate stream has a pH of about 2 to 10.

REFERENCES:
patent: 2944396 (1960-07-01), Barton
patent: 4070281 (1978-01-01), Tagashira et al.
patent: 4098639 (1978-07-01), Noreus et al.
patent: 4182648 (1980-01-01), Pradt et al.
patent: 4265747 (1981-05-01), Copa et al.
patent: 4372940 (1983-02-01), Brandenburg et al.
patent: 4387084 (1983-06-01), Brandenburg et al.
patent: 4395339 (1983-07-01), Chowdhury et al.
patent: 4461743 (1984-07-01), Chowdhury et al.
patent: 4626354 (1986-12-01), Hoffman et al.
patent: 4749492 (1988-06-01), Berrigan, Jr. et al.
patent: 4810386 (1989-03-01), Copa et al.
patent: 4812243 (1989-03-01), Brandenburg et al.
patent: 4897196 (1990-01-01), Copa et al.
patent: 4919815 (1990-04-01), Copa et al.
patent: 5034094 (1991-07-01), Kurple
patent: 5057231 (1991-10-01), Mueller et al.
patent: 5075015 (1991-12-01), Kamke
patent: 5082571 (1992-01-01), Beula et al.
patent: 5106513 (1992-04-01), Hong
patent: 5183577 (1993-02-01), Lehmann
patent: 5192442 (1993-03-01), Piccirillo et al.
patent: 5192453 (1993-03-01), Keckler et al.
patent: 5230810 (1993-07-01), Clark et al.
patent: 5234607 (1993-08-01), Brandenburg et al.
patent: 5240619 (1993-08-01), Copa et al.
patent: 5244576 (1993-09-01), DeRoeck et al.
patent: 5262060 (1993-11-01), Lehmann et al.
patent: 5268104 (1993-12-01), Masoomain
patent: 5298174 (1994-03-01), Momont et al.
patent: 5302288 (1994-04-01), Meidl et al.
patent: 5310484 (1994-05-01), Berrigan, Jr.
patent: 5340473 (1994-08-01), Roberts et al.
patent: 5368726 (1994-11-01), Masoomian
patent: 5389259 (1995-02-01), Berrigan, Jr.
patent: 5389264 (1995-02-01), Lehmann et al.
patent: 5460732 (1995-10-01), Momont
patent: 5534148 (1996-07-01), Suzuki et al.
patent: 5641413 (1997-06-01), Momont et al.
patent: 5651897 (1997-07-01), Lehmann
patent: 5674405 (1997-10-01), Bourhis
patent: 5885422 (1999-03-01), Kurukchi et al.
patent: 5891346 (1999-04-01), Huntley
patent: 6110385 (2000-08-01), Copa et al.
patent: 6190564 (2001-02-01), Lehmann et al.
patent: 6210583 (2001-04-01), Kurukchi et al.
patent: 6444130 (2002-09-01), Manganaro et al.
Woodings, Calvin Regenerated Cellulose Fibres.. Woodhead Publishing. p. 57-61 Online version available at: http://knovel.com/web/portal/browse/display?—EXT—KNOVEL—DISPLAY—bookid=817&VerticalID=0.
Woodings, Calvin Regenerated Cellulose Fibres. Woodhead Publishing. 2001. p. 57-61 Online version availiable at: http://knovel.com/web/portal/browse/display?—EXT—KNOVEL—DISPLAY—bookid=817&VerticallD=0.
S. Mukherjee et al., “Absorption of Carbon Disulfide in Alkaline Solution—Equipment Selection,” 2002WEC, pp. 454-459.
Enneking, Joseph C., “Control of Carbon Disulfide Emissions from Viscose Processes,”Environmental Progress, Oct. 2002, pp. 169-174, vol. 21, No. 3).

Affiliated with

Also associated with

Rating

System and method of wet oxidation of a viscose process stream does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System and method of wet oxidation of a viscose process stream, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method of wet oxidation of a viscose process stream will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4155439