GB846232A - Improvements in and relating to paper-making pulp - Google Patents

Improvements in and relating to paper-making pulp

Info

Publication number
GB846232A
GB846232A GB1170/59A GB117059A GB846232A GB 846232 A GB846232 A GB 846232A GB 1170/59 A GB1170/59 A GB 1170/59A GB 117059 A GB117059 A GB 117059A GB 846232 A GB846232 A GB 846232A
Authority
GB
United Kingdom
Prior art keywords
pulp
liquor
lignocellulose
softening
paper
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.)
Expired
Application number
GB1170/59A
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.)
HAWAILAN DEV Co Ltd
Fort James Corp
Original Assignee
HAWAILAN DEV Co Ltd
Crown Zellerbach Corp
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 HAWAILAN DEV Co Ltd, Crown Zellerbach Corp filed Critical HAWAILAN DEV Co Ltd
Publication of GB846232A publication Critical patent/GB846232A/en
Expired legal-status Critical Current

Links

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
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

846,232. Production of paper pulp. HAWAIIAN DEVELOPMENT CO. Ltd., and CROWN ZELLERBACH CORPORATION. Jan. 13, 1959 [Jan. 14, 1958], No. 1170/59. Class 96. Paper-making pulp is prepared by mixing non-woody lignocellulosic material, e.g. whole or de-pithed bagasse, straw, or grasses, with at least one alkali or alkaline earth metal hydroxide liquor, e.g. the hydroxide of sodium, potassium, lithium, calcium, barium, or strontium having a pH value of at least 12, the mixture having a liquor to dry lignocellulose ratio of 2 to 100 to 1; maintaining the temperature at 50‹ to 250‹ F. until the lignocellulose has exhausted 1 to 7% of its own weight of the hydroxide (calculated as NaOH), thereby softening the lignocellulose without substantially delignifying it, and mechanically defibrating the softened material, e.g. using a single, double, or multiple disc refiner, rod mill, ball mill, or hammer mill, to form a mechanical pulp. Such pulp may be mixed with 1 to 50% of chemical pulp. It may be bleached, e.g. by adding 0.2 to 5% of an alkali metal hydrosulphite of which 5 to 95% may be added during softening, and the rest after defibrating. The softening may be effected continuously using a tank of liquor maintained at the required concentration, the treated material being drained or passed through a screw press, squeeze rolls, or a washer for removal of liquor which may be returned to the tank.
GB1170/59A 1958-01-14 1959-01-13 Improvements in and relating to paper-making pulp Expired GB846232A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US846232XA 1958-01-14 1958-01-14

Publications (1)

Publication Number Publication Date
GB846232A true GB846232A (en) 1960-08-31

Family

ID=22186170

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1170/59A Expired GB846232A (en) 1958-01-14 1959-01-13 Improvements in and relating to paper-making pulp

Country Status (1)

Country Link
GB (1) GB846232A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2298642A1 (en) * 1975-01-27 1976-08-20 Elektrokemiska Ab Bleached mechanical pulp for paper mfr. - using two stage softening and bleaching treatment to obtain high strength and brightness
US4040899A (en) * 1972-07-03 1977-08-09 Clupak, Inc. Production of high strength packaging papers from straw
GB2125080A (en) * 1982-08-06 1984-02-29 Kimberly Clark Co Modifying bagasse pulp
EP0631009A1 (en) * 1993-06-28 1994-12-28 Till Grether Method for the recovery and processing of fibers from hollow stalk plants
GB2401069A (en) * 2003-03-10 2004-11-03 Andritz Ag Maschf Processing lignocellulose materials
CN114507999A (en) * 2022-01-28 2022-05-17 湛江晨鸣浆纸有限公司 Coated white cardboard made of multiple fiber raw materials and production process thereof

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4040899A (en) * 1972-07-03 1977-08-09 Clupak, Inc. Production of high strength packaging papers from straw
FR2298642A1 (en) * 1975-01-27 1976-08-20 Elektrokemiska Ab Bleached mechanical pulp for paper mfr. - using two stage softening and bleaching treatment to obtain high strength and brightness
GB2125080A (en) * 1982-08-06 1984-02-29 Kimberly Clark Co Modifying bagasse pulp
EP0631009A1 (en) * 1993-06-28 1994-12-28 Till Grether Method for the recovery and processing of fibers from hollow stalk plants
GB2401069A (en) * 2003-03-10 2004-11-03 Andritz Ag Maschf Processing lignocellulose materials
GB2401069B (en) * 2003-03-10 2006-01-04 Andritz Ag Maschf Process and device for discharging wood chips from a digester and conveying the raw material to a refiner
CN114507999A (en) * 2022-01-28 2022-05-17 湛江晨鸣浆纸有限公司 Coated white cardboard made of multiple fiber raw materials and production process thereof
CN114507999B (en) * 2022-01-28 2023-11-10 湛江晨鸣浆纸有限公司 Coated white cardboard of various fiber raw materials and production process thereof

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