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ATE24556T1 - PROCESS FOR POLYSULFIDE TREATMENT IN ALKALINE PULPING PROCESS OF LIGNOCELLULOSIC MATERIAL. - Google Patents

PROCESS FOR POLYSULFIDE TREATMENT IN ALKALINE PULPING PROCESS OF LIGNOCELLULOSIC MATERIAL.

Info

Publication number
ATE24556T1
ATE24556T1 AT82903084T AT82903084T ATE24556T1 AT E24556 T1 ATE24556 T1 AT E24556T1 AT 82903084 T AT82903084 T AT 82903084T AT 82903084 T AT82903084 T AT 82903084T AT E24556 T1 ATE24556 T1 AT E24556T1
Authority
AT
Austria
Prior art keywords
liquor
polysulphide
wood chips
wood
chips
Prior art date
Application number
AT82903084T
Other languages
German (de)
Inventor
Nils V Mannbro
Original Assignee
Nils V Mannbro
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 Nils V Mannbro filed Critical Nils V Mannbro
Application granted granted Critical
Publication of ATE24556T1 publication Critical patent/ATE24556T1/en

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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0057—Oxidation of liquors, e.g. in order to reduce the losses of sulfur compounds, followed by evaporation or combustion if the liquor in question is a black liquor
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
    • D21C3/022—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes in presence of S-containing compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)

Abstract

Preparation of polysulphide for treatment of wood chips so that the wood consumption is reduced in kraft digestion of paper pulp. In an impregnation stage the wood chips are caused to react with black liquor, or black liquor components containing digestion liquor prepared of white liquor, while introducing oxygen of appropriate concentration in an impregnation vessel. The content of monosulphide, and to a certain extent other sulphur compounds present in the liquors, thereby forms polysulphide in contact with the wood chips which instantaneously absorb the polysulphide. Generation of polysulphide is promoted by wood reactions. Black liquor having a reduced concentration of hydroxide is withdrawn from the wood chips before delignification thereof in digestion liquor prepared of white liquor and residual impregnation liquor from the wood chips. The withdrawn black liquor is conveyed to a plant for regeneration of hydroxide in white liquor and sulphide, which wholly or partly is recovered in the form of white liquor, and which sulphide is repeatedly polysulphide-oxidized. The yield increment of pulp from the digester, as well as after the bleaching stage, is greater in oxidative polysulphide processing in presence of wood chips than in separate processing thereof in liquor before the charging into wood chips. This is interpreted such that more polysulphide is formed in the presence of chips than without.
AT82903084T 1981-10-21 1982-10-13 PROCESS FOR POLYSULFIDE TREATMENT IN ALKALINE PULPING PROCESS OF LIGNOCELLULOSIC MATERIAL. ATE24556T1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE8106203A SE8106203L (en) 1981-10-21 1981-10-21 SET FOR POLYSULPHIDE TREATMENT OF LIGNOCELLULOSAMATERIAL FOR ALKALIC PREPARATION
PCT/SE1982/000330 WO1983001469A1 (en) 1981-10-21 1982-10-13 A method of polysulphide treatment in alkaline pulping of lignocellulose material
EP82903084A EP0091457B1 (en) 1981-10-21 1982-10-13 A method of polysulphide treatment in alkaline pulping of lignocellulose material

Publications (1)

Publication Number Publication Date
ATE24556T1 true ATE24556T1 (en) 1987-01-15

Family

ID=20344836

Family Applications (1)

Application Number Title Priority Date Filing Date
AT82903084T ATE24556T1 (en) 1981-10-21 1982-10-13 PROCESS FOR POLYSULFIDE TREATMENT IN ALKALINE PULPING PROCESS OF LIGNOCELLULOSIC MATERIAL.

Country Status (5)

Country Link
EP (1) EP0091457B1 (en)
AT (1) ATE24556T1 (en)
DE (1) DE3274887D1 (en)
SE (1) SE8106203L (en)
WO (1) WO1983001469A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI122841B (en) * 2004-10-04 2012-07-31 Metso Paper Inc Method and apparatus for making cellulosic pulp
US8940129B2 (en) 2010-12-30 2015-01-27 Uop Llc Process for reducing one or more insoluble solids in a black liquor
SE538792C2 (en) 2015-02-06 2016-11-29 Stora Enso Oyj Apparatus and method for component assembly

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI40677B (en) * 1961-05-27 1968-12-31 Papirind Forskningsinst
NO123511C (en) * 1966-05-14 1976-07-22 Domtar Ltd
US3567572A (en) * 1967-09-06 1971-03-02 Pulp Paper Res Inst Polysulfide liquor impregnation of lignocellulose materials in a multistage pulping process
US3723242A (en) * 1971-04-01 1973-03-27 Union Camp Corp Oxidation of sulfide pulping liquor to form polysulfide liquor in situ
NO142408C (en) * 1972-04-11 1980-08-20 Rosenlew Ab Oy W PROCEDURES FOR ALKALISK CELLULOS COOKING.
CA1013903A (en) * 1973-06-04 1977-07-19 Union Camp Corporation Method of pulping with polysulfide

Also Published As

Publication number Publication date
SE8106203L (en) 1983-04-22
EP0091457B1 (en) 1986-12-30
EP0091457A1 (en) 1983-10-19
WO1983001469A1 (en) 1983-04-28
DE3274887D1 (en) 1987-02-05

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
REN Ceased due to non-payment of the annual fee