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DE293309T1 - METHOD FOR THE PRODUCTION OF CHEMITHERMOMECHANICAL CELLS. - Google Patents

METHOD FOR THE PRODUCTION OF CHEMITHERMOMECHANICAL CELLS.

Info

Publication number
DE293309T1
DE293309T1 DE198888420160T DE88420160T DE293309T1 DE 293309 T1 DE293309 T1 DE 293309T1 DE 198888420160 T DE198888420160 T DE 198888420160T DE 88420160 T DE88420160 T DE 88420160T DE 293309 T1 DE293309 T1 DE 293309T1
Authority
DE
Germany
Prior art keywords
process according
pulp
sodium
heating
reducing agent
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.)
Pending
Application number
DE198888420160T
Other languages
German (de)
Inventor
Robert F-38020 Grenoble Cedex Angelier
Michel F-69110 Sainte-Foy-Les-Lyon Devic
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.)
Arkema France SA
Original Assignee
Atochem SA
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 SA filed Critical Atochem SA
Publication of DE293309T1 publication Critical patent/DE293309T1/en
Pending 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
    • 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)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Steroid Compounds (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Catalysts (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.

Claims (14)

02933DS 88 420 160.9 Ansprüche02933DS 88 420 160.9 Claims 1. Verfahren zur Herstellung von chemisch-thermomechanischem Stoffbrei (CTMP) bei dem Natriumsulfit oder Natriumbisulfit oder ein Gemisch von Schwefeldioxid und Natriumhydroxid einwirkt sowie ein Reduktionsmittel, das elektonegativer ist als das Sulfidion, darin bestehend, daß man mit einer mechanischen Zerfaserung des Lignocellulosestoffs eine Erhitzung verknüpft, die diesen Stoff nicht zerstört, bei einer Temperatur von 1000C oder darüber unter dem Druck gesättigten Wasserdampfs, mit Hilfe der genannten Sulfite, Bisulfite oder dem Gemisch und dem genannten Reduktionsmittel, dadurch gekennzeichnet, daß diese Sulfite, Bisulfite oder das Gemisch und dieses Reduktionsmittel auf den Lignocellulosestoff gleichzeitig und in einem Milieu mit einem Anfangs-pH von zwischen 7 und 12,5 einwirken, um so einen Stoffbrei zu erhalten, der geeignet ist für das Bleichen mittels Wasserstoffperoxid in wässrigem alkalischem Milieu.1. Process for the preparation of chemical thermomechanical pulp (CTMP) using sodium sulphite or sodium bisulfite or a mixture of sulphur dioxide and sodium hydroxide and a reducing agent more electronegative than the sulphide ion, consisting in combining mechanical defibration of the lignocellulosic pulp with heating which does not destroy said pulp, at a temperature of 100 ° C or more under the pressure of saturated steam, using said sulphites, bisulfites or the mixture and said reducing agent, characterized in that said sulphites, bisulfites or the mixture and said reducing agent act on the lignocellulosic pulp simultaneously and in an environment with an initial pH of between 7 and 12.5, so as to obtain a pulp suitable for bleaching by means of hydrogen peroxide in an aqueous alkaline environment. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Reduktionsmittel ausgewählt wird aus dem Dioxid des Thioharnstoffs, Natriumborhydrid oder Natriumdithionit.2. Process according to claim 1, characterized in that the reducing agent is selected from the dioxide of thiourea, sodium borohydride or sodium dithionite. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß das Thioharnstoffdioxid oder Natriumhydrosulfit in einer Menge von 0,1 % bis 5 % eingesetzt werden.3. Process according to claim 2, characterized in that the thiourea dioxide or sodium hydrosulfite is used in an amount of 0.1% to 5%. 02S33Ü902S33Ü9 - 2 - 88 420 160.9- 2 - 88 420 160.9 4. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß das Natriumborhydrid in einer Menge von 0,01 % bis 0,5 % eingesetzt wird.4. Process according to claim 2, characterized in that the sodium borohydride is used in an amount of 0.01% to 0.5%. 5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Erhitzungstemperatur 2000C nicht übersteigt.5. Process according to one of claims 1 to 4, characterized in that the heating temperature does not exceed 200 ° C. 6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß die Erhitzungstemperatur zwischen 12O0C und6. Process according to claim 5, characterized in that the heating temperature is between 12O 0 C and 1600C liegt.160 0 C. 7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Menge an Natriumsulfit,7. Process according to one of claims 1 to 6, characterized in that the amount of sodium sulphite, ■ 15 Natriumbisulfit oder dem Gemisch von Schwefelf dioxid-Natriumhydroxid so gewählt ist, daß sie■ 15 Sodium bisulfite or the mixture of sulfur dioxide-sodium hydroxide is selected so that j zwischen 0,1 % und 10 % ausgedrückt als Schwefelj between 0.1 % and 10 % expressed as sulphur dioxid liegt.dioxide. 8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch8. Method according to one of claims 1 to 7, characterized gekennzeichnet, daß der Lignocellulosestoff vorcharacterized in that the lignocellulosic substance is dem Erhitzen mit einem Komplexierungsmittel oder Maskierungsmittel behandelt wird.treated with a complexing agent or sequestering agent after heating. 9. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Lignocellulosestoff zum Zeitpunkt des Erhitzens mit einem Komplexierungsmittel oder Maskierungsmittel umgesetzt wird.9. Process according to one of claims 1 to 7, characterized in that the lignocellulosic substance is reacted with a complexing agent or sequestering agent at the time of heating. 10. Verfahren nach einem der Ansprüche 8 oder 9, dadurch gekennzeichnet, daß das Komplexierungsmittel oder Maskierungsmittel DTPA ist.10. Process according to one of claims 8 or 9, characterized in that the complexing agent or sequestering agent is DTPA. - 3 - 88 420 160.9- 3 - 88 420 160.9 11. Verfahren nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß das Erhitzen vor während oder nach der mechanischen Zerfaserung erfolgt.11. Process according to one of claims 1 to 10, characterized in that the heating takes place before, during or after the mechanical defibration. 12. Bleichen eines gemäß einein der Ansprüche 1 bis hergestellten Stoffbreis, umfassend das Waschen dieses Stoffbreis um daraus die Sulfitionen und das Reduktionsmittel zu entfernen, und danach die Einwirkung von Wasserstoffperoxid im wässrigen alkalischen Milieu auf diesen gewaschenen Stoffbrei. 12. Bleaching a pulp prepared according to one of claims 1 to , comprising washing this pulp to remove the sulfite ions and the reducing agent therefrom, and then exposing this washed pulp to hydrogen peroxide in an aqueous alkaline medium. 13. Verfahren nach Anspruch 12, dadurch gekennzeichnet, daß das Wasserstoffperoxid in einem Milieu mit einem pH zwischen 9 und 11 eingesetzt wird.13. Process according to claim 12, characterized in that the hydrogen peroxide is used in an environment with a pH between 9 and 11. 14. Vertahren nach einem der Ansprüche 12 und 13, da- \ durch gekennzeichnet, daß das Wasserstoffperoxid in einer Menge von 2 % bis 6 % eingesetzt wird.14. Process according to one of claims 12 and 13, characterized in that the hydrogen peroxide is used in an amount of 2% to 6%.
DE198888420160T 1987-05-25 1988-05-17 METHOD FOR THE PRODUCTION OF CHEMITHERMOMECHANICAL CELLS. Pending DE293309T1 (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
DE293309T1 true DE293309T1 (en) 1989-05-11

Family

ID=9351559

Family Applications (2)

Application Number Title Priority Date Filing Date
DE8888420160T Expired - Fee Related DE3861982D1 (en) 1987-05-25 1988-05-17 METHOD FOR THE PRODUCTION OF CHEMITHERMOMECHANICAL CELLS.
DE198888420160T Pending DE293309T1 (en) 1987-05-25 1988-05-17 METHOD FOR THE PRODUCTION OF CHEMITHERMOMECHANICAL CELLS.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE8888420160T Expired - Fee Related DE3861982D1 (en) 1987-05-25 1988-05-17 METHOD FOR THE PRODUCTION OF CHEMITHERMOMECHANICAL CELLS.

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
ATE61639T1 (en) 1991-03-15
NO882263L (en) 1988-11-28
JPH0217675B2 (en) 1990-04-23
AU609481B2 (en) 1991-05-02
PT87569B (en) 1992-09-30
AU1661488A (en) 1988-12-01
FR2615874A1 (en) 1988-12-02
NZ224749A (en) 1989-08-29
FI882448A (en) 1988-11-26
EP0293309B1 (en) 1991-03-13
FI93746B (en) 1995-02-15
NO171801C (en) 1993-05-05
NO171801B (en) 1993-01-25
DE3861982D1 (en) 1991-04-18
ES2004855A4 (en) 1989-02-16
PT87569A (en) 1989-05-31
NO882263D0 (en) 1988-05-24
EP0293309A1 (en) 1988-11-30
FI882448A0 (en) 1988-05-24
FI93746C (en) 1995-05-26
ES2004855B3 (en) 1991-08-16
JPS63303189A (en) 1988-12-09
CA1310452C (en) 1992-11-24

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