NO920692D0 - PROCEDURE FOR THE PREPARATION OF CELLULOSE FIBER MATERIALS - Google Patents

PROCEDURE FOR THE PREPARATION OF CELLULOSE FIBER MATERIALS

Info

Publication number
NO920692D0
NO920692D0 NO920692A NO920692A NO920692D0 NO 920692 D0 NO920692 D0 NO 920692D0 NO 920692 A NO920692 A NO 920692A NO 920692 A NO920692 A NO 920692A NO 920692 D0 NO920692 D0 NO 920692D0
Authority
NO
Norway
Prior art keywords
pulp
sulfide
supply
content
cooking
Prior art date
Application number
NO920692A
Other languages
Norwegian (no)
Other versions
NO920692L (en
Inventor
Jian E Jiang
Joe R Phillips
Brian F Greenwood
Robert Prough
Kaj Henricson
Bertil C Stroemberg
Rolf Ryham
James W Smith
Original Assignee
Kamyr Inc
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 GB919111256A external-priority patent/GB9111256D0/en
Application filed by Kamyr Inc filed Critical Kamyr Inc
Publication of NO920692D0 publication Critical patent/NO920692D0/en
Publication of NO920692L publication Critical patent/NO920692L/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
    • D21C11/0064—Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green 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
    • 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
    • D21C3/22—Other features of pulping processes
    • D21C3/26—Multistage processes

Abstract

Paper pulp (e.g. kraft pulp or sulfite pulp) is produced utilizing at least two different supplies (35, 41) of cooking liquor (e.g. white liquor), having different percentages of lignin reaction enhancing or carbohydrate degradation slowing chemicals (e.g. one having low sulfide content, and the other high sulfide content). The high sulfide content supply is typically used to impregnate the pulp (in 37), while the second supply is used in other cooking stages (e. g. digester 12), whether co-current or countercurrent. At least 60% of the sulfide of the cooking chemicals may be provided in the first supply (35). Some of the sulfide in the first supply is desirably provided in the form of polysulfide or elemental sulfur. When about 2% polysulfide on wood is utilized yield is significantly increased. Utilizing multiple chemical (e.g. sulfide) content supplies results in an optimum viscosity/kappa ratio and/or pulp strength properties for the pulp produced. <IMAGE>
NO92920692A 1991-05-24 1992-02-21 TREATMENT OF ORGANIC SULFUR GASES, SPECIFICALLY IN POWER SYSTEMS AND PROCESSES NO920692L (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB919111256A GB9111256D0 (en) 1991-05-24 1991-05-24 Pulping process
US75684991A 1991-09-10 1991-09-10
US78815191A 1991-11-05 1991-11-05

Publications (2)

Publication Number Publication Date
NO920692D0 true NO920692D0 (en) 1992-02-21
NO920692L NO920692L (en) 1992-11-25

Family

ID=27265676

Family Applications (1)

Application Number Title Priority Date Filing Date
NO92920692A NO920692L (en) 1991-05-24 1992-02-21 TREATMENT OF ORGANIC SULFUR GASES, SPECIFICALLY IN POWER SYSTEMS AND PROCESSES

Country Status (6)

Country Link
EP (1) EP0517689B1 (en)
JP (1) JPH05163690A (en)
AT (1) ATE155540T1 (en)
DE (1) DE69220853D1 (en)
FI (1) FI921254A0 (en)
NO (1) NO920692L (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6132556A (en) * 1993-05-04 2000-10-17 Andritz-Ahlstrom Inc. Method of controlling pulp digester pressure via liquor extraction
US5575890A (en) * 1993-05-04 1996-11-19 Kamyr, Inc. Method for selectively increasing the sulfide ion concentration and sulfidity of kraft cooking liquor during kraft cooking of wood
FI102976B1 (en) * 1994-02-28 1999-03-31 Valtion Teknillinen A process for the production and use of additional cooking chemicals in the sulfate process
US5522958A (en) * 1994-07-18 1996-06-04 Pulp And Paper Research Institute Of Canada Two-stage kraft cooking
AU2697295A (en) * 1994-09-02 1996-03-27 Kamyr Inc. Continuous kraft cooking with black liquor pretreatment
US5660686A (en) * 1994-09-02 1997-08-26 Ahlstrom Machinery Inc. Cooking with spent liquor pretreatment of cellulose material
SE9703365D0 (en) * 1997-09-18 1997-09-18 Kvaerner Pulping Tech Method in connection with impregnation and digestion of lignocelulosic material
AU3253400A (en) * 1999-05-11 2000-11-30 Air Products And Chemicals Inc. Use of oxidized whiite liquor in a kraft mill digester
US20070240837A1 (en) * 2006-04-13 2007-10-18 Andritz Inc. Hardwood alkaline pulping processes and systems
JP5360546B2 (en) * 2007-01-15 2013-12-04 日本セルロース株式会社 Pulp manufacturing method
EP2521693A1 (en) * 2010-01-05 2012-11-14 Basf Se Heat transfer and heat storage fluids for extremely high temperatures, based on polysulfides
FI129362B (en) 2017-05-16 2021-12-31 Andritz Oy Method for producing chemical pulp

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI44743C (en) * 1962-09-15 1971-12-10 Dominon Tar & Chemical Cyclic process for the production of cellulose
US5053108A (en) * 1989-06-28 1991-10-01 Kamyr Ab High sulfidity cook for paper pulp using black liquor sulfonization of steamed chips
EP0738343B1 (en) * 1991-02-06 1999-09-29 Ahlstrom Machinery Oy A method of recovering energy and chemicals from black liquor

Also Published As

Publication number Publication date
DE69220853D1 (en) 1997-08-21
FI921254A0 (en) 1992-03-24
EP0517689B1 (en) 1997-07-16
NO920692L (en) 1992-11-25
EP0517689A1 (en) 1992-12-09
JPH05163690A (en) 1993-06-29
ATE155540T1 (en) 1997-08-15

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