NZ226104A - Manufacture of cellulose pulp during which aqueous lignocellulosic material is activated with nitrogen dioxide - Google Patents
Manufacture of cellulose pulp during which aqueous lignocellulosic material is activated with nitrogen dioxideInfo
- Publication number
- NZ226104A NZ226104A NZ226104A NZ22610488A NZ226104A NZ 226104 A NZ226104 A NZ 226104A NZ 226104 A NZ226104 A NZ 226104A NZ 22610488 A NZ22610488 A NZ 22610488A NZ 226104 A NZ226104 A NZ 226104A
- Authority
- NZ
- New Zealand
- Prior art keywords
- gas
- lignocellulosic material
- separated
- activating
- activated
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C1/00—Pretreatment of the finely-divided materials before digesting
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/06—Treatment of pulp gases; Recovery of the heat content of the gases; Treatment of gases arising from various sources in pulp and paper mills; Regeneration of gaseous SO2, e.g. arising from liquors containing sulfur compounds
Landscapes
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Immobilizing And Processing Of Enzymes And Microorganisms (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Compounds Of Unknown Constitution (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
Method of activating aqueous lignocellulosic material with a gas containing nitrogen oxide, followed by a delignification stage for the purpose of obtaining a high quality end product with no or only a slight effect on the environment. In accordance with the inventive method, the lignocellulosic material is brought into contact (18) with an oxygen-containing gas (19), and activating gas is separated from the lignocellulosic material during and/or subsequent to the activating process (9). The method is characterized by a) controlling the supply of oxygen-containing gas (12) such that the separated gas (27) contains at least 2 kg nitric oxide (NO) calculated on 1000 kg of dry lignocellulosic material, and by b) reacting the separated gas (27) in one or more stages (26) with absorption solution (25) whose original pH lies within the range 3-13.5, and by passing (28) the gas purified with the aid of absorption solution to atmosphere, or to a destruction plant optionally subsequent ot further purification of the gas.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8703718A SE460543B (en) | 1987-09-28 | 1987-09-28 | PROCEDURE FOR ACTIVATING LIGNOCELLULO MATERIAL WITH NITROGEN Dioxide CONTAINING GAS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NZ226104A true NZ226104A (en) | 1990-05-28 |
Family
ID=20369679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NZ226104A NZ226104A (en) | 1987-09-28 | 1988-09-09 | Manufacture of cellulose pulp during which aqueous lignocellulosic material is activated with nitrogen dioxide |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP0309998B1 (en) |
| JP (1) | JP2510424B2 (en) |
| AT (1) | ATE101886T1 (en) |
| AU (1) | AU605913B2 (en) |
| CA (1) | CA1301412C (en) |
| DE (1) | DE3887948T2 (en) |
| ES (1) | ES2049234T3 (en) |
| FI (1) | FI93231C (en) |
| NO (1) | NO172698C (en) |
| NZ (1) | NZ226104A (en) |
| SE (1) | SE460543B (en) |
| ZA (1) | ZA887229B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE9200183L (en) * | 1992-01-23 | 1993-07-24 | Kamyr Ab | SEPARATORY DEVICE AND PROCEDURE |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4165253A (en) * | 1978-07-20 | 1979-08-21 | Ivanov Mikhail A | Process for producing pulp |
| SE421938B (en) * | 1980-06-05 | 1982-02-08 | Mo Och Domsjoe Ab | PROCEDURE FOR TREATMENT OF CELLULOSAMASSA |
| SE451023B (en) * | 1985-12-10 | 1987-08-24 | Mo Och Domsjoe Ab | METHOD OF ACTIVATING LIGNOCELLULOSAMATER MATERIAL WITH NITROGEN Dioxide CONTAINING GAS |
-
1987
- 1987-09-28 SE SE8703718A patent/SE460543B/en not_active IP Right Cessation
-
1988
- 1988-09-09 NZ NZ226104A patent/NZ226104A/en unknown
- 1988-09-14 CA CA000577358A patent/CA1301412C/en not_active Expired - Fee Related
- 1988-09-27 ES ES88115896T patent/ES2049234T3/en not_active Expired - Lifetime
- 1988-09-27 AU AU22832/88A patent/AU605913B2/en not_active Ceased
- 1988-09-27 FI FI884432A patent/FI93231C/en not_active IP Right Cessation
- 1988-09-27 EP EP88115896A patent/EP0309998B1/en not_active Expired - Lifetime
- 1988-09-27 JP JP63242205A patent/JP2510424B2/en not_active Expired - Lifetime
- 1988-09-27 ZA ZA887229A patent/ZA887229B/en unknown
- 1988-09-27 DE DE3887948T patent/DE3887948T2/en not_active Expired - Fee Related
- 1988-09-27 NO NO884279A patent/NO172698C/en unknown
- 1988-09-27 AT AT88115896T patent/ATE101886T1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| AU605913B2 (en) | 1991-01-24 |
| ES2049234T3 (en) | 1994-04-16 |
| DE3887948D1 (en) | 1994-03-31 |
| NO884279D0 (en) | 1988-09-27 |
| JP2510424B2 (en) | 1996-06-26 |
| CA1301412C (en) | 1992-05-26 |
| JPH01104894A (en) | 1989-04-21 |
| NO172698C (en) | 1993-08-25 |
| AU2283288A (en) | 1989-04-06 |
| ZA887229B (en) | 1989-06-28 |
| SE8703718L (en) | 1989-03-29 |
| SE8703718D0 (en) | 1987-09-28 |
| DE3887948T2 (en) | 1994-08-18 |
| FI884432A (en) | 1989-03-29 |
| NO884279L (en) | 1989-03-29 |
| ATE101886T1 (en) | 1994-03-15 |
| FI93231B (en) | 1994-11-30 |
| EP0309998A2 (en) | 1989-04-05 |
| FI884432A0 (en) | 1988-09-27 |
| EP0309998A3 (en) | 1991-07-17 |
| EP0309998B1 (en) | 1994-02-23 |
| FI93231C (en) | 1995-03-10 |
| NO172698B (en) | 1993-05-18 |
| SE460543B (en) | 1989-10-23 |
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