EP0309998A3 - A method in the activation of lignocellulosic material with a gas containing nitrogen dioxide - Google Patents

A method in the activation of lignocellulosic material with a gas containing nitrogen dioxide Download PDF

Info

Publication number
EP0309998A3
EP0309998A3 EP19880115896 EP88115896A EP0309998A3 EP 0309998 A3 EP0309998 A3 EP 0309998A3 EP 19880115896 EP19880115896 EP 19880115896 EP 88115896 A EP88115896 A EP 88115896A EP 0309998 A3 EP0309998 A3 EP 0309998A3
Authority
EP
European Patent Office
Prior art keywords
gas
lignocellulosic material
separated
activating
containing nitrogen
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP19880115896
Other languages
German (de)
French (fr)
Other versions
EP0309998A2 (en
EP0309998B1 (en
Inventor
Hans Olof Prof. Samuelson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mo och Domsjo AB
Original Assignee
Mo och Domsjo AB
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
Application filed by Mo och Domsjo AB filed Critical Mo och Domsjo AB
Priority to AT88115896T priority Critical patent/ATE101886T1/en
Publication of EP0309998A2 publication Critical patent/EP0309998A2/en
Publication of EP0309998A3 publication Critical patent/EP0309998A3/en
Application granted granted Critical
Publication of EP0309998B1 publication Critical patent/EP0309998B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Immobilizing And Processing Of Enzymes And Microorganisms (AREA)
  • Compounds Of Unknown Constitution (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Investigating Or Analysing Biological Materials (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.
EP88115896A 1987-09-28 1988-09-27 A method in the activation of lignocellulosic material with a gas containing nitrogen dioxide Expired - Lifetime EP0309998B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88115896T ATE101886T1 (en) 1987-09-28 1988-09-27 PROCESSES IN THE ACTIVATION OF LIGNOCELLULOSIC MATERIAL WITH A GAS CONTAINING NITROGEN DIOXIDE.

Applications Claiming Priority (2)

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
SE8703718 1987-09-28

Publications (3)

Publication Number Publication Date
EP0309998A2 EP0309998A2 (en) 1989-04-05
EP0309998A3 true EP0309998A3 (en) 1991-07-17
EP0309998B1 EP0309998B1 (en) 1994-02-23

Family

ID=20369679

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88115896A Expired - Lifetime EP0309998B1 (en) 1987-09-28 1988-09-27 A method in the activation of lignocellulosic material with a gas containing 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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9200183L (en) * 1992-01-23 1993-07-24 Kamyr Ab SEPARATORY DEVICE AND PROCEDURE

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4165253A (en) * 1978-07-20 1979-08-21 Ivanov Mikhail A Process for producing pulp
US4439271A (en) * 1980-06-05 1984-03-27 Mo Och Domsjo Aktiebolag Process for the oxygen bleaching of cellulose pulp

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE451023B (en) * 1985-12-10 1987-08-24 Mo Och Domsjoe Ab METHOD OF ACTIVATING LIGNOCELLULOSAMATER MATERIAL WITH NITROGEN Dioxide CONTAINING GAS

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4165253A (en) * 1978-07-20 1979-08-21 Ivanov Mikhail A Process for producing pulp
US4439271A (en) * 1980-06-05 1984-03-27 Mo Och Domsjo Aktiebolag Process for the oxygen bleaching of cellulose pulp

Also Published As

Publication number Publication date
NZ226104A (en) 1990-05-28
ATE101886T1 (en) 1994-03-15
NO884279L (en) 1989-03-29
SE8703718L (en) 1989-03-29
FI884432A (en) 1989-03-29
JP2510424B2 (en) 1996-06-26
AU2283288A (en) 1989-04-06
FI884432A0 (en) 1988-09-27
CA1301412C (en) 1992-05-26
FI93231B (en) 1994-11-30
SE460543B (en) 1989-10-23
SE8703718D0 (en) 1987-09-28
DE3887948D1 (en) 1994-03-31
DE3887948T2 (en) 1994-08-18
FI93231C (en) 1995-03-10
NO884279D0 (en) 1988-09-27
EP0309998A2 (en) 1989-04-05
NO172698C (en) 1993-08-25
ES2049234T3 (en) 1994-04-16
ZA887229B (en) 1989-06-28
NO172698B (en) 1993-05-18
EP0309998B1 (en) 1994-02-23
AU605913B2 (en) 1991-01-24
JPH01104894A (en) 1989-04-21

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