RU98109942A - TWO-STAGE DELIGNIFICATION OF LIGNOCELLULOSE MASS OXYGEN - Google Patents

TWO-STAGE DELIGNIFICATION OF LIGNOCELLULOSE MASS OXYGEN

Info

Publication number
RU98109942A
RU98109942A RU98109942/12A RU98109942A RU98109942A RU 98109942 A RU98109942 A RU 98109942A RU 98109942/12 A RU98109942/12 A RU 98109942/12A RU 98109942 A RU98109942 A RU 98109942A RU 98109942 A RU98109942 A RU 98109942A
Authority
RU
Russia
Prior art keywords
stage
oxygen
delignification
pulp
mass oxygen
Prior art date
Application number
RU98109942/12A
Other languages
Russian (ru)
Other versions
RU2148118C1 (en
Inventor
Бокстрем Моника
Мелландер Пиа
Норден Солвейг
Original Assignee
Сундс Дефибратор Индустрис АБ
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 SE9503720A external-priority patent/SE505141C2/en
Application filed by Сундс Дефибратор Индустрис АБ filed Critical Сундс Дефибратор Индустрис АБ
Publication of RU98109942A publication Critical patent/RU98109942A/en
Application granted granted Critical
Publication of RU2148118C1 publication Critical patent/RU2148118C1/en

Links

Claims (4)

1. Двухстадийный способ делигнификации кислородом массы из лигноцеллюлозного материала при средней концентрации, отличающийся тем, что длительную делигнификацию достигают тем, что температуру на первой стадии поддерживают ниже 90°С, а на второй стадии - выше 90°С, разность температур между стадиями меньше 20°С, давление на первой стадии составляет 4-10 бар, а на второй стадии - 2-5 бар, давление на первой стадии выше, чем на второй стадии, добавление кислорода на первой стадии является высоким, 25-50 кг/т целлюлозы, щелочь добавляют только на первой стадии для достижения высокой щелочности целлюлозы, 25-50 кг щелочи на тонну целлюлозы и время пребывания на первой стадии составляет 10-30 мин, а на второй стадии 45-180 мин.1. A two-stage method for oxygen delignification of a mass of lignocellulosic material at an average concentration, characterized in that long-term delignification is achieved in that the temperature in the first stage is maintained below 90 ° C and in the second stage above 90 ° C, the temperature difference between the stages is less than 20 ° C, the pressure in the first stage is 4-10 bar, and in the second stage - 2-5 bar, the pressure in the first stage is higher than in the second stage, the addition of oxygen in the first stage is high, 25-50 kg / t of cellulose, alkali is added only on the first tadii to achieve a high alkalinity of the pulp, 25-50 kg alkali per ton pulp, and the residence time in the first step is 10-30 min and in the second step 45-180 min. 2. Способ по п. 1, отличающийся тем, что увеличение температуры между двумя кислородными стадиями составляет 10-15°С. 2. The method according to p. 1, characterized in that the temperature increase between the two oxygen stages is 10-15 ° C. 3. Способ по любому из предыдущих пунктов, отличающийся тем, что время пребывания целлюлозы на первой стадии составляет 15-25 мин, а на второй стадии - 60-120 мин. 3. The method according to any one of the preceding paragraphs, characterized in that the residence time of cellulose in the first stage is 15-25 minutes, and in the second stage - 60-120 minutes 4. Способ по любому из предыдущих пунктов, отличающийся тем, что дополнительный кислород загружают в количестве 0-5 кг/т целлюлозы на второй стадии. 4. The method according to any one of the preceding paragraphs, characterized in that the additional oxygen is charged in an amount of 0-5 kg / t of pulp in the second stage.
RU98109942A 1995-10-23 1996-09-18 Two-stage delignification of lignocellulose mass with oxygen RU2148118C1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9503720A SE505141C2 (en) 1995-10-23 1995-10-23 Oxygen delignification of pulp in two stages with high loading of alkali and oxygen and temperature below 90 C in the first step
SE9503720-6 1995-10-23
PCT/SE1996/001154 WO1997015715A1 (en) 1995-10-23 1996-09-18 Oxygen delignification of lignocellulosic pulp in two steps

Publications (2)

Publication Number Publication Date
RU98109942A true RU98109942A (en) 2000-02-27
RU2148118C1 RU2148118C1 (en) 2000-04-27

Family

ID=20399927

Family Applications (1)

Application Number Title Priority Date Filing Date
RU98109942A RU2148118C1 (en) 1995-10-23 1996-09-18 Two-stage delignification of lignocellulose mass with oxygen

Country Status (18)

Country Link
US (1) US6221206B1 (en)
EP (1) EP0857231B1 (en)
JP (1) JP3459072B2 (en)
CN (1) CN1072743C (en)
AT (1) ATE254687T1 (en)
AU (1) AU691132B2 (en)
BR (1) BR9611243A (en)
CA (1) CA2231048C (en)
DE (1) DE69630803T2 (en)
ES (1) ES2206598T3 (en)
MY (1) MY117900A (en)
NO (1) NO324111B1 (en)
NZ (1) NZ320687A (en)
PT (1) PT857231E (en)
RU (1) RU2148118C1 (en)
SE (1) SE505141C2 (en)
WO (1) WO1997015715A1 (en)
ZA (1) ZA967932B (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE510740C2 (en) * 1996-11-26 1999-06-21 Sunds Defibrator Ind Ab Oxygen delignification control
SE9803474L (en) * 1998-10-08 2000-04-09 Valmet Fibertech Ab Oxygen bleaching of pulp
FI113187B (en) 1999-05-28 2007-09-25 Metso Paper Pori Oy Procedure for treating pulp
SE522593C2 (en) 1999-07-06 2004-02-24 Kvaerner Pulping Tech Oxygen gas delignification system and method of pulp of lignocellulosic material
FI117391B (en) 2000-05-16 2006-09-29 Andritz Oy Method and apparatus for pulping
US20050087315A1 (en) * 2003-10-28 2005-04-28 Donovan Joseph R. Low consistency oxygen delignification process
SE0403202L (en) * 2004-12-30 2005-10-25 Kvaerner Pulping Tech Method for oxygen delignification of cellulose pulp with high-pressure mixing of chemicals
SE0403222L (en) * 2004-12-30 2005-11-08 Kvaerner Pulping Tech Method for oxygen delignification of cellulose pulp at high pressure in several steps
CN100400744C (en) * 2006-05-26 2008-07-09 华南理工大学 Moderate-thick paper pulp pressure stabilizing dual flow-lift tower oxygen bleaching method
US9469548B2 (en) 2015-02-20 2016-10-18 Hydro Dynamics, Inc. Continuous hydrodynamic cavitation crystallization
US10220365B2 (en) 2015-03-31 2019-03-05 Hydro Dynamics, Inc. Method and apparatus for hydrogenating substances using controlled mechanically induced cavitation
JP6933640B2 (en) * 2015-04-10 2021-09-08 コメット バイオリファイニング インコーポレイテッド Methods and compositions for the treatment of cellulosic biomass and the products produced thereby
US10011804B2 (en) 2015-08-21 2018-07-03 Ecoxtraction, Llc Method of extracting CBD, THC, and other compounds from cannabis using controlled cavitation
CA3075029A1 (en) * 2017-09-11 2019-03-14 Solenis Technologies, L.P. Method for enhanced oxygen delignification of chemical wood pulps
EP4142475A4 (en) 2020-04-30 2024-05-08 Hydro Dynamics Inc System and method for treatment of plants for synthesis of compounds therefrom

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5217575A (en) * 1988-10-18 1993-06-08 Kamyr Ab Process for oxygen bleaching using two vertical reactors
US4946556A (en) * 1989-04-25 1990-08-07 Kamyr, Inc. Method of oxygen delignifying wood pulp with between stage washing
US5034095A (en) * 1989-06-01 1991-07-23 Oji Paper Co., Ltd. Apparatus and process for the delignification of cellulose pulp

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