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Patents

Referenced by

Citing PatentFiling dateIssue dateOriginal AssigneeTitle
US400252513 Mar 197511 Jan 1977Flambeau Paper CompanyChemical recovery from waste liquors utilizing indirect heat exchangers in multi-stage evaporation plus contact steam stripping
US42395892 Oct 197816 Dec 1980Air Products and Chemicals, Inc.Process for oxidation of black liquor
US455119822 Mar 19845 Nov 1985Kamyr, Inc.Method of flashing black liquor
US490989921 Sep 198720 Mar 1990A. Ahlstrom CorporationMethod of concentrating sludges
US51124417 Aug 199012 May 1992Oy Tampella ABProcess for the recovery of heat and chemicals from spent liquor
US51748608 Nov 198929 Dec 1992Low temperature recovery of kraft black liquor
US591185311 Sep 199715 Jun 1999International Paper CompanyMethod for treating paper mill condensate to reduce the amount of sulfur compounds therein
US630625210 Apr 199523 Oct 2001Andritz-Ahlstrom Inc.Heat recovery from spent digester cooking liquor
US735130617 Jan 20031 Apr 2008Metso Fiber Karlstad ABCooking of cellulose pulp in a cooking liquor containing pre-evaporated black liquor