RU93058344A - HIGH EFFICIENCY METHOD OF BLEACHING CHLORIDE PULP PULP - Google Patents

HIGH EFFICIENCY METHOD OF BLEACHING CHLORIDE PULP PULP

Info

Publication number
RU93058344A
RU93058344A RU93058344/12A RU93058344A RU93058344A RU 93058344 A RU93058344 A RU 93058344A RU 93058344/12 A RU93058344/12 A RU 93058344/12A RU 93058344 A RU93058344 A RU 93058344A RU 93058344 A RU93058344 A RU 93058344A
Authority
RU
Russia
Prior art keywords
pulp
bleaching
high efficiency
chloride
efficiency method
Prior art date
Application number
RU93058344/12A
Other languages
Russian (ru)
Other versions
RU2091530C1 (en
Inventor
Чанг Ху-мин
Джамиль Хасан
Е.Сегер Джеффри
Original Assignee
Норс Каролина Стейт Юниверсити
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US07/649,848 external-priority patent/US5268075A/en
Application filed by Норс Каролина Стейт Юниверсити filed Critical Норс Каролина Стейт Юниверсити
Publication of RU93058344A publication Critical patent/RU93058344A/en
Application granted granted Critical
Publication of RU2091530C1 publication Critical patent/RU2091530C1/en

Links

Claims (1)

Высокоэффективный способ отбеливания древесной пульпы для получения древесных пульп с более высокой степенью осветления при таком же расходе двуокиси хлора или такой же степени осветления при значительно уменьшенном расходе двуокиси хлора. Способ включает взаимодействие двуокиси хлора с древесной пульпой при pH около 5-10 в течение примерно 5-40 мин, а затем окисление смеси до pH примерно 1,9-4,2. Смесь затем в течение 2 или более часов взаимодействует для полного проведения двуступенчатого способа отбеливания с высоким/низким pH.A highly effective method of bleaching wood pulp to produce wood pulps with a higher degree of clarification with the same consumption of chlorine dioxide or the same degree of clarification with significantly reduced consumption of chlorine dioxide. The method involves the interaction of chlorine dioxide with wood pulp at a pH of about 5-10 for about 5-40 minutes, and then oxidizing the mixture to a pH of about 1.9-4.2. The mixture is then reacted for 2 hours or more to complete the two-stage high / low pH bleaching process.
RU9293058344A 1991-02-01 1992-01-29 Method of groundwood pulp bleaching RU2091530C1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US649848 1984-09-11
US07/649,848 US5268075A (en) 1989-10-19 1991-02-01 High efficiency two-step, high-low pH chlorine dioxide pulp bleaching process
US649.848 1991-02-01
PCT/US1992/000769 WO1992013991A1 (en) 1991-02-01 1992-01-29 High efficiency chlorine dioxide pulp bleaching process

Publications (2)

Publication Number Publication Date
RU93058344A true RU93058344A (en) 1996-03-20
RU2091530C1 RU2091530C1 (en) 1997-09-27

Family

ID=24606473

Family Applications (1)

Application Number Title Priority Date Filing Date
RU9293058344A RU2091530C1 (en) 1991-02-01 1992-01-29 Method of groundwood pulp bleaching

Country Status (11)

Country Link
US (1) US5268075A (en)
EP (1) EP0576541B1 (en)
JP (1) JPH06510335A (en)
CN (1) CN1041541C (en)
AU (1) AU1467892A (en)
CA (1) CA2101752A1 (en)
DE (1) DE69228872D1 (en)
FI (1) FI933409A (en)
PL (1) PL170541B3 (en)
RU (1) RU2091530C1 (en)
WO (1) WO1992013991A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI119383B (en) * 1998-03-06 2008-10-31 Andritz Oy Procedure for treating pulp
CN1100177C (en) * 2000-07-20 2003-01-29 华南理工大学 High-temp ClO2 bleaching method of sulfated wood pulp
US20060201642A1 (en) * 2005-03-08 2006-09-14 Andritz Inc. Methods of treating chemical cellulose pulp
PT2082096E (en) * 2006-10-11 2013-04-26 Akzo Nobel Nv Bleaching of pulp
US8920603B2 (en) * 2006-10-11 2014-12-30 Akzo Nobel N.V. Bleaching of pulp
US9057156B2 (en) * 2010-12-22 2015-06-16 Skzo Nobel Chemicals International B.V. Process for improving chlorine dioxide bleaching of pulp
FR3062138B1 (en) 2017-01-23 2019-06-07 Centre Technique De L'industrie Des Papiers, Cartons Et Celluloses PROCESS FOR WHITENING A PAPER PULP

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433702A (en) * 1965-06-28 1969-03-18 Hooker Chemical Corp Woodpulp bleaching process
US3884752A (en) * 1973-09-17 1975-05-20 Int Paper Co Single vessel wood pulp bleaching with chlorine dioxide followed by sodium hypochlorite or alkaline extraction
FR2432574A1 (en) * 1978-08-01 1980-02-29 Europeen Cellulose PROCESS FOR BLEACHING PAPER PULP
SE442880B (en) * 1980-11-27 1986-02-03 Mo Och Domsjoe Ab PROCEDURE FOR DELIGNIFICATION / WHITING OF CELLULOSAMASSA WITH CHLORIDE Dioxide / CHLORINE IN THE SAME STEP
SE8106334L (en) * 1981-10-27 1983-04-28 Sunds Defibrator SETTLE TO TREAT CELLULOSIC MATERIAL
WO1991005909A1 (en) * 1989-10-19 1991-05-02 North Carolina State University High efficiency chlorine dioxide pulp bleaching process

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