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GB1449828A
(en)
*
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1973-04-26 |
1976-09-15 |
Canadian Ind |
Oxygen pulping process
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FI48764C
(fi)
*
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1973-05-30 |
1977-07-26 |
Ahlstroem Oy |
Menetelmä ja laite selluloosamassan valkaisemiseksi molekylaarisella h apella.
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US4089737A
(en)
*
|
1974-02-18 |
1978-05-16 |
Toyo Pulp Company, Ltd. |
Delignification of cellulosic material with an alkaline aqueous medium containing oxygen dissolved therein
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SE393138B
(sv)
*
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1974-03-14 |
1977-05-02 |
Mo Och Domsjoe Ab |
Forfarande for blekning av cellulosa med en syre innehallande gas i nervaro av natriumbikarbonat
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SE394466C
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1974-05-16 |
1986-06-23 |
Mannbro Systems Handelsbolag |
Sett vid kontinuerlig alkalisk delignifiering av lignocellulosamaterial i tva eller flera steg, varav det sista med syrgas
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FR2282500A1
(fr)
*
|
1974-08-20 |
1976-03-19 |
Grp Europ De Cellulose |
Procede de fabrication de pate a papier
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SE413684C
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*
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1974-09-23 |
1987-05-18 |
Mo Och Domsjoe Ab |
Forfarande for framstellning av cellulosamassa i utbytesomradet 65-95 %
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SE385027B
(sv)
*
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1974-09-27 |
1976-05-31 |
Mo Och Domsjoe Ab |
Forfarande for att frilegga cellulosafibrer
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US4119486A
(en)
*
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1975-08-14 |
1978-10-10 |
Westvaco Corporation |
Process for bleaching wood pulp with ozone in the presence of a cationic surfactant
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LU74434A1
(fi)
*
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1976-02-25 |
1977-09-12 |
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US4338158A
(en)
*
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1976-04-09 |
1982-07-06 |
Weyerhaeuser Company |
Pulping in the presence of a protector
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AU3102077A
(en)
*
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1976-12-01 |
1979-06-07 |
New Zealand Dev Finance |
Treating lignocellulosic or cellulosic pulp
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US4259149A
(en)
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1978-05-03 |
1981-03-31 |
Hooker Chemicals & Plastics Corp. |
Method of reducing waste stream pollutants by the control and separation of waste contaminants from a multi-stage cellulosic bleaching sequence
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SE413785B
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1978-09-22 |
1980-06-23 |
Mo Och Domsjoe Ab |
Forfarande for uppslutning av lignocellulosahaltiga material genom alkalisk kokning i nervaro av ett tillsatsemne av redoxtyp
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US4248662A
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*
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1979-01-22 |
1981-02-03 |
The Black Clawson Company |
Oxygen pulping with recycled liquor
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SE462919B
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1979-05-11 |
1990-09-17 |
Sunds Defibrator Ind Ab |
Saett att genomfoera alkaliextraktion av cellulosamassa i naervaro av syre
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SE434284B
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1980-05-07 |
1984-07-16 |
Mo Och Domsjoe Ab |
Forfarande vid syrgasdelignifiering av kemiskt uppsluten cellulosamassa varvid aromatiska diaminer tillfores
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SE441192B
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*
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1980-05-27 |
1985-09-16 |
Mo Och Domsjoe Ab |
Forfarande for delignifiering av kemisk cellulosamassa med syrgas i nervaro av ett eller flera neutralisationsmedel
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US4416727A
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*
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1982-01-11 |
1983-11-22 |
Air Products And Chemicals, Inc. |
Process for recovering fiber from wet-strength resin coated paper
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1984-08-01 |
1986-02-13 |
Degussa Ag, 6000 Frankfurt |
Verfahren zur delignifizierung und bleiche von zellstoffen
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1991-01-03 |
1992-12-22 |
Union Camp Patent Holding, Inc. |
Process for enhanced oxygen delignification using high consistency and a split alkali addition
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1989-02-15 |
1993-05-18 |
Union Camp Patent Holding, Inc. |
Process for high consistency oxygen delignification of alkaline treated pulp followed by ozone delignification
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1989-02-15 |
1995-04-25 |
Union Camp Patent Holding, Inc. |
Process for ozone bleaching of oxygen delignified pulp while conveying the pulp through a reaction zone
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1989-02-15 |
1993-02-23 |
Union Camp Patent Holding, Inc. |
Process for high consistency oxygen delignification followed by ozone relignification
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1989-02-15 |
1992-02-04 |
Union Camp Patent Holding, Inc. |
Methods of high consistency oxygen delignification using a low consistency alkali pretreatment
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1989-02-15 |
1993-06-08 |
Union Camp Patent Holdings Inc. |
Process for oxygen delignifying high consistency pulp by removing and recycling pressate from alkaline pulp
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1989-02-15 |
1996-06-11 |
Union Camp Patent Holding, Inc. |
Process for high consistency delignification using a low consistency alkali pretreatment
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1990-05-17 |
1992-11-17 |
Union Camp Patent Holding, Inc. |
Environmentally improved process for bleaching lignocellulosic materials with ozone
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1990-05-17 |
1995-08-15 |
Union Camp Patent Holding, Inc. |
Method for chelation of pulp prior to ozone delignification
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*
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1990-05-17 |
1992-11-17 |
Union Camp Patent Holding, Inc. |
Environmentally improved process for bleaching lignocellulosic materials with ozone
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1992-02-21 |
2000-08-22 |
Ahlstrom Machinery Inc. |
Treatment of recycled bleach plant filtrates
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1993-10-01 |
1996-09-10 |
Union Camp Patent Holdings, Inc. |
Reduction of salt scale precipitation by control of process stream Ph and salt concentration
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EP0647466A3
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1993-10-08 |
1996-01-17 |
Akzo Nobel Nv |
Cellulosische Membranen.
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SE9401771D0
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*
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1994-05-24 |
1994-05-24 |
Hans Olof Samuelson |
Process for removal of metal compounds in lignocellulosic pulp
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US5770010A
(en)
*
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1995-04-20 |
1998-06-23 |
R-J Holding Company |
Pulping process employing nascent oxygen
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US6325892B1
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1998-09-23 |
2001-12-04 |
University Of New Brunswick |
Method of delignifying sulphite pulp with oxygen and borohydride
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SE522161C2
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1999-06-17 |
2004-01-20 |
Kvaerner Pulping Tech |
Förfarande och anordning för syrgasdelignifiering med förbättrad kappareduktion
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CA2651483C
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2006-05-19 |
2013-06-18 |
Raymond Francis |
Methods for carbonate pretreatment and pulping of cellulosic material
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FI20070126A0
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2006-09-08 |
2007-02-13 |
Linde Ag |
Menetelmä hartsin poistamiseksi massasta ja hiilidioksidin tai (bi)karbonaatin käyttö tähän tarkoitukseen
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2008-03-18 |
2012-11-06 |
The Research Foundation Of State University Of New York |
Methods of pretreating comminuted cellulosic material with carbonate-containing solutions
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