|
| US3951733 | 6 Nov 1974 | 20 Apr 1976 | International Paper Company | Delignification and bleaching of wood pulp with oxygen |
| US4002526 | 10 Oct 1975 | 11 Jan 1977 | International Paper Company | Oxygen-alkali delignification of low consistency wood pulp |
| US4089737 | 30 Aug 1976 | 16 May 1978 | Toyo Pulp Company, Ltd. | Delignification of cellulosic material with an alkaline aqueous medium containing oxygen dissolved therein |
| US4115186 | 8 May 1974 | 19 Sep 1978 | A. Ahlstrom Osakeyhtio | Process for bleaching cellulose pulp with molecular oxygen |
| US4155806 | 6 May 1975 | 22 May 1979 | Skogsagarnas Industri Aktiebolag | Method for continuous alkaline delignification of lignocellulose material in two or more steps, the final of which with oxygen |
| US4198266 | 12 Oct 1977 | 15 Apr 1980 | Airco, Inc. | Oxygen delignification of wood pulp |
| US4209359 | 23 Oct 1978 | 24 Jun 1980 | International Paper Company | Process for removing residual oxygen from oxygen-bleached pulp |
| US4216054 | 26 Sep 1977 | 5 Aug 1980 | Weyerhaeuser Company | Low-consistency ozone delignification |
| US4227964 | 26 Mar 1979 | 14 Oct 1980 | | Method of treating lignocellulosic or cellulosic pulp to promote the kinking of pulp fibres and/or to improve paper tear strength |
| US4259150 | 10 Dec 1979 | 31 Mar 1981 | Kamyr Inc. | Plural stage mixing and thickening oxygen bleaching process |
| US4294654 | 21 Mar 1980 | 13 Oct 1981 | International Paper Company | Delignification and bleaching of lignocellulosic pulp via photo-oxygenation |
| US4295925 | 15 Jun 1979 | 20 Oct 1981 | Weyerhaeuser Company | Treating pulp with oxygen |
| US4295926 | 15 Jun 1979 | 20 Oct 1981 | Weyerhaeuser Company | Method and apparatus for treating pulp with oxygen |
| US4295927 | 15 Jun 1979 | 20 Oct 1981 | Weyerhaeuser Company | Method and apparatus for treating pulp with oxygen and storing the treated pulp |
| US4384920 | 11 Aug 1982 | 24 May 1983 | The Black Clawson Company
Air Products and Chemicals Inc. | Method and apparatus for oxygen delignification |
| US4419184 | 20 Jul 1981 | 6 Dec 1983 | Kamyr AB | Method for control of chemicals during gas treatment of suspensions |
| US4451332 | 29 Jul 1982 | 29 May 1984 | SCA Development Aktiebolag | Method for delignification of ligno-cellulose containing fiber material with an alkali-oxygen extraction stage |
| US4568420 | 3 Dec 1984 | 4 Feb 1986 | International Paper Company | Multi-stage bleaching process including an enhanced oxidative extraction stage |
| US4684442 | 1 Apr 1985 | 4 Aug 1987 | Weyerhaeuser Company | Oxygen reactor deaeration tank and system |
| US4756798 | 16 Apr 1987 | 12 Jul 1988 | | Process for bleaching a mechanical pulp with hydrogen peroxide |
| US4840703 | 28 Jun 1988 | 20 Jun 1989 | Rauma-Repola Oy | Method for controlling an oxygen bleaching |
| US4886577 | 3 May 1985 | 12 Dec 1989 | Kamyr, Inc. | Method and apparatus for mixing oxygen gas with medium consistency pulp in a pump discharge |
| US4978426 | 13 Jan 1989 | 18 Dec 1990 | Westvaco Corporation | Production of high strength linerboard with oxygen and alkali |
| US5085734 | 2 Mar 1990 | 4 Feb 1992 | Union Camp Patent Holding, Inc. | Methods of high consistency oxygen delignification using a low consistency alkali pretreatment |
| US5164043 | 26 Aug 1991 | 17 Nov 1992 | Union Camp Patent Holding, Inc. | Environmentally improved process for bleaching lignocellulosic materials with ozone |
| US5164044 | 26 Aug 1991 | 17 Nov 1992 | Union Camp Patent Holding, Inc. | Environmentally improved process for bleaching lignocellulosic materials with ozone |
| US5173153 | 3 Jan 1991 | 22 Dec 1992 | Union Camp Patent Holding, Inc. | Process for enhanced oxygen delignification using high consistency and a split alkali addition |
| US5174861 | 28 Aug 1991 | 29 Dec 1992 | Union Camp Patent Holdings, Inc. | Method of bleaching high consistency pulp with ozone |
| US5181989 | 26 Oct 1990 | 26 Jan 1993 | Union Camp Patent Holdings, Inc. | Reactor for bleaching high consistency pulp with ozone |
| US5188708 | 26 Aug 1991 | 23 Feb 1993 | Union Camp Patent Holding, Inc. | Process for high consistency oxygen delignification followed by ozone relignification |
| US5211811 | 26 Aug 1991 | 18 May 1993 | Union Camp Patent Holding, Inc. | Process for high consistency oxygen delignification of alkaline treated pulp followed by ozone delignification |
| US5217574 | 16 Apr 1991 | 8 Jun 1993 | Union Camp Patent Holdings Inc. | Process for oxygen delignifying high consistency pulp by removing and recycling pressate from alkaline pulp |
| US5266160 | 6 Nov 1991 | 30 Nov 1993 | Kamyr, Inc. | Method of an apparatus for treating pulp |
| US5296099 | 28 Aug 1992 | 22 Mar 1994 | Union Camp Holding, Inc. | Environmentally improved process for bleaching lignocellulosic materials with oxygen, ozone and chlorine dioxide |
| US5387317 | 28 Jan 1993 | 7 Feb 1995 | The Mead Corporation | Oxygen/ozone/peracetic aicd delignification and bleaching of cellulosic pulps |
| US5409570 | 25 Nov 1992 | 25 Apr 1995 | Union Camp Patent Holding, Inc. | Process for ozone bleaching of oxygen delignified pulp while conveying the pulp through a reaction zone |
| US5451296 | 8 Mar 1994 | 19 Sep 1995 | Union Camp Patent Holding, Inc. | Two stage pulp bleaching reactor |
| US5472572 | 15 Jan 1992 | 5 Dec 1995 | Union Camp Patent Holding, Inc. | Reactor for bleaching high consistency pulp with ozone |
| US5520783 | 25 Jan 1993 | 28 May 1996 | Union Camp Patent Holding, Inc. | Apparatus for bleaching high consistency pulp with ozone |
| US5525195 | 7 Sep 1993 | 11 Jun 1996 | Union Camp Patent Holding, Inc. | Process for high consistency delignification using a low consistency alkali pretreatment |
| US5554259 | 1 Oct 1993 | 10 Sep 1996 | Union Camp Patent Holdings, Inc. | Reduction of salt scale precipitation by control of process stream Ph and salt concentration |
| US5693184 | 4 Sep 1996 | 2 Dec 1997 | Union Camp Patent Holding, Inc. | Reduction of salt scale precipitation by control of process stream pH and salt concentration |
| US5755926 | 4 Feb 1997 | 26 May 1998 | Kimberly-Clark Worldwide, Inc. | Integrated pulping process of waste paper yielding tissue-grade paper fibers |
| US5863389 | 8 Mar 1994 | 26 Jan 1999 | Union Camp Patent Holding, Inc. | Pulp bleaching reactor for dispersing high consistency pulp into a gaseous bleaching agent containing ozone |
| US6340409 | 29 Apr 1993 | 22 Jan 2002 | | Method for multistage bleaching using gaseous reagent in the first stage with controlled gas release |
| US7812153 | 11 Mar 2004 | 12 Oct 2010 | Rayonier Products and Financial Services Company | Process for manufacturing high purity xylose |
