SE8106501L - PROCEDURE FOR THE PREPARATION OF CHEMICAL PAPER Pulp AND SALUNDA PREPARED Pulp - Google Patents

PROCEDURE FOR THE PREPARATION OF CHEMICAL PAPER Pulp AND SALUNDA PREPARED Pulp

Info

Publication number
SE8106501L
SE8106501L SE8106501A SE8106501A SE8106501L SE 8106501 L SE8106501 L SE 8106501L SE 8106501 A SE8106501 A SE 8106501A SE 8106501 A SE8106501 A SE 8106501A SE 8106501 L SE8106501 L SE 8106501L
Authority
SE
Sweden
Prior art keywords
pulp
paper pulp
chips
woods
salunda
Prior art date
Application number
SE8106501A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE460855B (en
Inventor
D Lachenal
Choudens C De
P Monzie
Original Assignee
Ugine Kuhlmann
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 Ugine Kuhlmann filed Critical Ugine Kuhlmann
Publication of SE8106501L publication Critical patent/SE8106501L/en
Publication of SE460855B publication Critical patent/SE460855B/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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/26—Multistage processes

Landscapes

  • Paper (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

The present invention relates to a process for producing a chemical paper pulp, wherein woodchips are digested at a defined temperature in an alkaline liquid containing a sulphur compound and the digestion process is stopped at a temperature at which the chips have a residual lignin content which corresponds to a kappa index of between 45 and 100 for resin-containing woods (soft-woods) and 30 to 50 for hard woods, and the chips thus treated are then mechanically defibrated and subsequently the digestion process of these defibrated chips is carried out with an alkaline solution which contains 0.1 to 1.5% of peroxide, relative to the weight of the dry defibrated material. The invention also relates to the paper pulp obtained by the claimed process.
SE8106501A 1980-11-06 1981-11-03 PROCEDURES FOR PREPARING CHEMICAL PAPER Pulp SE460855B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8024075A FR2493365A1 (en) 1980-11-06 1980-11-06 PROCESS FOR THE MANUFACTURE OF CHEMICAL PAPER PULP AND PASTE THUS OBTAINED

Publications (2)

Publication Number Publication Date
SE8106501L true SE8106501L (en) 1982-05-07
SE460855B SE460855B (en) 1989-11-27

Family

ID=9247897

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8106501A SE460855B (en) 1980-11-06 1981-11-03 PROCEDURES FOR PREPARING CHEMICAL PAPER Pulp

Country Status (14)

Country Link
JP (1) JPS57106790A (en)
AT (1) AT376716B (en)
BE (1) BE890812A (en)
BR (1) BR8107190A (en)
CA (1) CA1162008A (en)
CH (1) CH645146A5 (en)
DE (1) DE3143523A1 (en)
ES (1) ES8304242A1 (en)
FI (1) FI76129C (en)
FR (1) FR2493365A1 (en)
IN (1) IN156251B (en)
IT (1) IT1144850B (en)
NO (1) NO162776C (en)
SE (1) SE460855B (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5526239B2 (en) * 1972-12-14 1980-07-11
JPS51116202A (en) * 1975-04-02 1976-10-13 Sanyo Kokusaku Pulp Co Process for making pulp with high yield
BE869153A (en) * 1977-07-29 1979-01-22 Ugine Kuhlmann PROCESS FOR THE MANUFACTURE OF CHEMICAL PAPER PULP
FR2398839A1 (en) * 1977-07-29 1979-02-23 Centre Tech Ind Papier Kraft type paper pulp prepn. without sulphur pollutants - by treating shavings with sodium hydroxide followed by stabilised peroxide

Also Published As

Publication number Publication date
ATA469981A (en) 1984-05-15
CH645146A5 (en) 1984-09-14
FI813489L (en) 1982-05-07
NO813747L (en) 1982-05-07
BE890812A (en) 1982-04-21
NO162776C (en) 1990-02-14
BR8107190A (en) 1982-07-20
FR2493365A1 (en) 1982-05-07
SE460855B (en) 1989-11-27
DE3143523A1 (en) 1982-07-08
FI76129B (en) 1988-05-31
CA1162008A (en) 1984-02-14
NO162776B (en) 1989-11-06
AT376716B (en) 1984-12-27
FR2493365B1 (en) 1984-05-11
IT1144850B (en) 1986-10-29
DE3143523C2 (en) 1990-01-18
FI76129C (en) 1988-09-09
JPH0380915B2 (en) 1991-12-26
IT8168398A0 (en) 1981-10-28
ES506891A0 (en) 1983-02-16
IN156251B (en) 1985-06-08
JPS57106790A (en) 1982-07-02
ES8304242A1 (en) 1983-02-16

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