FR2194840A1 - Hydrogen sulphide treatment of lignocellulosic materials - prior to alkaline digestion in pulp prodn. to eliminate loss of sulphur - Google Patents

Hydrogen sulphide treatment of lignocellulosic materials - prior to alkaline digestion in pulp prodn. to eliminate loss of sulphur

Info

Publication number
FR2194840A1
FR2194840A1 FR7327715A FR7327715A FR2194840A1 FR 2194840 A1 FR2194840 A1 FR 2194840A1 FR 7327715 A FR7327715 A FR 7327715A FR 7327715 A FR7327715 A FR 7327715A FR 2194840 A1 FR2194840 A1 FR 2194840A1
Authority
FR
France
Prior art keywords
pulp
prior
treatment
lignocellulosic materials
sulphur
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
FR7327715A
Other languages
English (en)
French (fr)
Other versions
FR2194840B1 (Direct
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.)
MacMillan Bloedel Ltd
Original Assignee
MacMillan Bloedel Ltd
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 US00362009A external-priority patent/US3841962A/en
Application filed by MacMillan Bloedel Ltd filed Critical MacMillan Bloedel Ltd
Publication of FR2194840A1 publication Critical patent/FR2194840A1/fr
Application granted granted Critical
Publication of FR2194840B1 publication Critical patent/FR2194840B1/fr
Granted 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
    • D21C1/04—Pretreatment of the finely-divided materials before digesting with acid reacting compounds

Landscapes

  • Paper (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Glass Compositions (AREA)
FR7327715A 1972-07-31 1973-07-27 Hydrogen sulphide treatment of lignocellulosic materials - prior to alkaline digestion in pulp prodn. to eliminate loss of sulphur Granted FR2194840A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US27685372A 1972-07-31 1972-07-31
US00362009A US3841962A (en) 1972-07-31 1973-05-21 Hydrogen sulfide pretreatment of lignocellulosic materials in alkaline pulping processes

Publications (2)

Publication Number Publication Date
FR2194840A1 true FR2194840A1 (en) 1974-03-01
FR2194840B1 FR2194840B1 (Direct) 1976-04-30

Family

ID=26958163

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7327715A Granted FR2194840A1 (en) 1972-07-31 1973-07-27 Hydrogen sulphide treatment of lignocellulosic materials - prior to alkaline digestion in pulp prodn. to eliminate loss of sulphur

Country Status (5)

Country Link
JP (1) JPS5217121B2 (Direct)
FI (1) FI55693C (Direct)
FR (1) FR2194840A1 (Direct)
NO (1) NO137099C (Direct)
SE (1) SE389135B (Direct)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Also Published As

Publication number Publication date
SE389135B (sv) 1976-10-25
NO137099C (no) 1977-12-28
FI55693B (fi) 1979-05-31
NO137099B (no) 1977-09-19
JPS4992302A (Direct) 1974-09-03
JPS5217121B2 (Direct) 1977-05-13
FR2194840B1 (Direct) 1976-04-30
FI55693C (fi) 1979-09-10

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Legal Events

Date Code Title Description
ST Notification of lapse