FI882448A0 - Process for the preparation of bleached chemithermomechanical pulp - Google Patents

Process for the preparation of bleached chemithermomechanical pulp

Info

Publication number
FI882448A0
FI882448A0 FI882448A FI882448A FI882448A0 FI 882448 A0 FI882448 A0 FI 882448A0 FI 882448 A FI882448 A FI 882448A FI 882448 A FI882448 A FI 882448A FI 882448 A0 FI882448 A0 FI 882448A0
Authority
FI
Finland
Prior art keywords
preparation
chemithermomechanical pulp
aid
bleached chemithermomechanical
medium
Prior art date
Application number
FI882448A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI93746B (en
FI93746C (en
FI882448A (en
Inventor
Michel Devic
Robert Angelier
Original Assignee
Atochem
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 Atochem filed Critical Atochem
Publication of FI882448A0 publication Critical patent/FI882448A0/en
Publication of FI882448A publication Critical patent/FI882448A/en
Publication of FI93746B publication Critical patent/FI93746B/en
Application granted granted Critical
Publication of FI93746C publication Critical patent/FI93746C/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
    • D21C3/222—Use of compounds accelerating the pulping processes

Landscapes

  • Paper (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Catalysts (AREA)
  • Steroid Compounds (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

Process for the manufacture of CTMP pulps, in which a mechanical grinding of the lignocellulosic material is added to a cooking of the said material at a temperature equal to or higher than 100 DEG C, under saturated steam pressure, with the aid of Na2SO3 or NaHSO3 or SO2NaOH and of a reducing agent more electronegative than the SO3<=> ion, used together and in a medium of initial pH between 7 and 12.5, and bleaching of the manufactured pulp with the aid of H2O2 in an alkaline aqueous medium.
FI882448A 1987-05-25 1988-05-24 Process for the preparation of bleached chemithermomechanical pulp FI93746C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8707552A FR2615874B1 (en) 1987-05-25 1987-05-25 PROCESS FOR THE PREPARATION OF CHEMICOTHERMOMECHANICAL PASTES
FR8707552 1987-05-25

Publications (4)

Publication Number Publication Date
FI882448A0 true FI882448A0 (en) 1988-05-24
FI882448A FI882448A (en) 1988-11-26
FI93746B FI93746B (en) 1995-02-15
FI93746C FI93746C (en) 1995-05-26

Family

ID=9351559

Family Applications (1)

Application Number Title Priority Date Filing Date
FI882448A FI93746C (en) 1987-05-25 1988-05-24 Process for the preparation of bleached chemithermomechanical pulp

Country Status (12)

Country Link
EP (1) EP0293309B1 (en)
JP (1) JPS63303189A (en)
AT (1) ATE61639T1 (en)
AU (1) AU609481B2 (en)
CA (1) CA1310452C (en)
DE (2) DE3861982D1 (en)
ES (1) ES2004855B3 (en)
FI (1) FI93746C (en)
FR (1) FR2615874B1 (en)
NO (1) NO171801C (en)
NZ (1) NZ224749A (en)
PT (1) PT87569B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2634233B1 (en) * 1988-07-12 1995-04-14 Atochem PROCESS FOR PRODUCING BLANCHED CHEMICOTHERMOMECHANICAL PASTES
FR2659363B1 (en) * 1990-03-07 1996-04-19 Atochem PROCESS FOR THE PREPARATION OF HIGHLY YIELDED PASTA.
SE468644B (en) * 1991-05-24 1993-02-22 Sunds Defibrator Ind Ab PREPARATION OF CHEMISTRY MECHANICAL MASS AND IMPROVEMENT SOLUTION CONTAINING BORHYDRIDE AND SULPHITE
DE10109502A1 (en) 2001-02-28 2002-09-12 Rhodia Acetow Gmbh Removal of hemicellulose from biomaterial, especially wood pulp, involves extraction by treatment with an aqueous solution of metal complex, e.g. nickel tris-2-aminoethyl-amine di-hydroxide
PT2931968T (en) * 2012-12-12 2019-01-11 Univ Dresden Tech Use of sodium dithionite in a cellulose pulping process
EP2924166A1 (en) 2014-03-25 2015-09-30 Basf Se Method for the manufacture of bleached wood fibre
CN111549552B (en) * 2020-05-25 2022-06-14 广西大学 High-yield chemi-mechanical pulp making method for recycling alkali in waste water

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1150451A (en) * 1956-05-04 1958-01-14 Saint Gobain Improvement in the manufacturing processes of semi-chemical cellulose pulps
US3284283A (en) * 1964-02-17 1966-11-08 Fmc Corp Production of wood pulps including treatment of cellulosic fibers with bisulfite ion followed by alkali metal borohydride
CH510168A (en) * 1969-07-30 1971-07-15 Vita Mayer & C Gia Process for the production of high yield and high degree of whiteness pastes for paper use
JPS5210300B2 (en) * 1973-06-19 1977-03-23
SE416481B (en) * 1977-05-02 1981-01-05 Mo Och Domsjoe Ab METHOD AND DEVICE FOR TREATMENT OF WOOD TIP FOR REMOVAL OF HEAVY METALS AND RESIN
CA1212505A (en) * 1984-07-17 1986-10-14 Rudy Vit Method, process and apparatus for converting wood, wood residue and or biomass into pulp
FR2634233B1 (en) * 1988-07-12 1995-04-14 Atochem PROCESS FOR PRODUCING BLANCHED CHEMICOTHERMOMECHANICAL PASTES

Also Published As

Publication number Publication date
FR2615874B1 (en) 1992-02-21
PT87569A (en) 1989-05-31
NO882263L (en) 1988-11-28
NO171801B (en) 1993-01-25
AU609481B2 (en) 1991-05-02
NO171801C (en) 1993-05-05
NZ224749A (en) 1989-08-29
ES2004855B3 (en) 1991-08-16
FI93746B (en) 1995-02-15
EP0293309A1 (en) 1988-11-30
NO882263D0 (en) 1988-05-24
AU1661488A (en) 1988-12-01
FR2615874A1 (en) 1988-12-02
FI93746C (en) 1995-05-26
FI882448A (en) 1988-11-26
DE3861982D1 (en) 1991-04-18
DE293309T1 (en) 1989-05-11
ES2004855A4 (en) 1989-02-16
CA1310452C (en) 1992-11-24
JPH0217675B2 (en) 1990-04-23
JPS63303189A (en) 1988-12-09
PT87569B (en) 1992-09-30
ATE61639T1 (en) 1991-03-15
EP0293309B1 (en) 1991-03-13

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Legal Events

Date Code Title Description
HC Name/ company changed in application

Owner name: ELF ATOCHEM S.A.

BB Publication of examined application
MM Patent lapsed

Owner name: ELF ATOCHEM S.A.