SE8200756L - SET TO MAKE CHEMICAL PAPER PAPER - Google Patents
SET TO MAKE CHEMICAL PAPER PAPERInfo
- Publication number
- SE8200756L SE8200756L SE8200756A SE8200756A SE8200756L SE 8200756 L SE8200756 L SE 8200756L SE 8200756 A SE8200756 A SE 8200756A SE 8200756 A SE8200756 A SE 8200756A SE 8200756 L SE8200756 L SE 8200756L
- Authority
- SE
- Sweden
- Prior art keywords
- chips
- pulp
- properties
- paper
- chemimechanical
- Prior art date
Links
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 abstract 2
- 229920001131 Pulp (paper) Polymers 0.000 abstract 2
- 150000002978 peroxides Chemical class 0.000 abstract 2
- 238000007670 refining Methods 0.000 abstract 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 238000004061 bleaching Methods 0.000 abstract 1
- 239000007844 bleaching agent Substances 0.000 abstract 1
- 239000011121 hardwood Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000003381 stabilizer Substances 0.000 abstract 1
- 239000002023 wood Substances 0.000 abstract 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/02—Pretreatment of the raw materials by chemical or physical means
- D21B1/021—Pretreatment of the raw materials by chemical or physical means by chemical means
-
- 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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
A process is provided for the production of chemimechanical pulp in the absence of silicate stabilizers. This chemimechanical pulp is characterized by (1) a pulp yield of at least 80% based on dry chips, (2) strength properties as shown by a combination of tear, burst and tensile properties which are superior to refiner mechanical pulp, and, (3) bleaching properties as shown by brightness properties which are superior to both refiner mechanical pulp and cold soda pulp. The chemimechanical pulp is prepared by impregnating hardwood chips with an alkaline peroxide liquor. The alkaline peroxide liquor is an aqueous solution containing about 0.5% to about 4% hydrogen peroxide and about 2.5% to about 10% sodium hydroxide based on dry chips. The impregnated chips have a pH greater than 7.5. The thus impregnated wood chips are then held for about 3 minutes to about 3 hours to soften and bleach the chips after which the chips are acidified to a pH of 7.5 or below by the addition of an acid material and thereafter defibrated by passing the acidified chips through refining apparatus operated at atmospheric pressure. The pulp produced by this defibration is recovered from the refining apparatus.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US23341581A | 1981-02-11 | 1981-02-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE8200756L true SE8200756L (en) | 1982-08-12 |
Family
ID=22877153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE8200756A SE8200756L (en) | 1981-02-11 | 1982-02-10 | SET TO MAKE CHEMICAL PAPER PAPER |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS57149581A (en) |
| AU (1) | AU545847B2 (en) |
| BR (1) | BR8200512A (en) |
| CA (1) | CA1173604A (en) |
| FI (1) | FI820296L (en) |
| NO (1) | NO820336L (en) |
| NZ (1) | NZ199486A (en) |
| SE (1) | SE8200756L (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE454186C (en) * | 1985-03-13 | 1989-09-25 | Eka Nobel Ab | SET FOR PREPARATION OF CHEMICAL MECHANICAL |
| SE8501246L (en) * | 1985-03-13 | 1986-09-14 | Eka Ab | SET TO MANUFACTURE IN BLEACH, CHEMICAL MECHANICAL AND SEMI-CHEMICAL FIBER MASS USING ONE-STEP IMAGRATION |
| US5607546A (en) * | 1990-02-13 | 1997-03-04 | Molnlycke Ab | CTMP-process |
| SE466060C (en) | 1990-02-13 | 1995-09-11 | Moelnlycke Ab | Absorbent chemitermomechanical mass and preparation thereof |
| FR2675518B1 (en) * | 1991-04-17 | 1996-10-18 | Atochem | PROCESS FOR THE PREPARATION OF HIGH YIELD AND BLEACHED PAPER PULP FROM WOOD CHIPS. |
| CN1250811C (en) | 2001-07-19 | 2006-04-12 | 安德里兹有限公司 | Four stage alkaline peroxide mechanical pulping |
| US20040200586A1 (en) | 2002-07-19 | 2004-10-14 | Martin Herkel | Four stage alkaline peroxide mechanical pulping |
| JP4501329B2 (en) * | 2002-03-29 | 2010-07-14 | 日本製紙株式会社 | Coated paper for gravure printing |
| CN104389214A (en) * | 2014-10-28 | 2015-03-04 | 广西大学 | Method for preparing APMP (Alkaline Peroxide Mechanical Pulp) by utilizing fresh bamboos |
-
1982
- 1982-01-13 AU AU79471/82A patent/AU545847B2/en not_active Ceased
- 1982-01-14 NZ NZ199486A patent/NZ199486A/en unknown
- 1982-01-20 CA CA000394564A patent/CA1173604A/en not_active Expired
- 1982-01-29 BR BR8200512A patent/BR8200512A/en unknown
- 1982-01-29 FI FI820296A patent/FI820296L/en not_active Application Discontinuation
- 1982-02-04 NO NO820336A patent/NO820336L/en unknown
- 1982-02-10 JP JP57020636A patent/JPS57149581A/en active Pending
- 1982-02-10 SE SE8200756A patent/SE8200756L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| NO820336L (en) | 1982-08-12 |
| BR8200512A (en) | 1982-12-07 |
| CA1173604A (en) | 1984-09-04 |
| AU7947182A (en) | 1982-08-19 |
| NZ199486A (en) | 1984-12-14 |
| FI820296L (en) | 1982-08-12 |
| JPS57149581A (en) | 1982-09-16 |
| AU545847B2 (en) | 1985-08-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NAV | Patent application has lapsed |
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