GB829506A - Improvements in the manufacture of wood putp - Google Patents

Improvements in the manufacture of wood putp

Info

Publication number
GB829506A
GB829506A GB33929/57A GB3392957A GB829506A GB 829506 A GB829506 A GB 829506A GB 33929/57 A GB33929/57 A GB 33929/57A GB 3392957 A GB3392957 A GB 3392957A GB 829506 A GB829506 A GB 829506A
Authority
GB
United Kingdom
Prior art keywords
lye
wood
leaching
sodium
dilute
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
GB33929/57A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB829506A publication Critical patent/GB829506A/en
Expired 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)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

Wood pulp is prepared by partially leaching wood with a lye containing sodium sulphite, an alkaline hydrosulphite, preferably sodium hydrosulphite, and oxalate ions and thereafter grinding the leached material. The oxalate ions may be provided by addition to the lye of sodium oxalate or oxalic acid. The wood may first be impregnated with a lye of such concentration that the reagents retained within the wood are sufficient for at least partial leaching, and thereafter leaching may be effected by use of a lye substantially more dilute than the lye for the impregnating step, e.g. a lye 3-6 times more dilute or a lye containing only sodium sulphite. The liquor from a preceding operation may also be used for leaching. The initial pH of the lye may be adjusted, e.g. by adding sodium carbonate so that, after the leaching step, the pH is between 5-7. The impregnated wood may also be leached by the use of steam in the absence of liquid. Examples are given.
GB33929/57A 1956-11-05 1957-10-30 Improvements in the manufacture of wood putp Expired GB829506A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1062101X 1956-11-05

Publications (1)

Publication Number Publication Date
GB829506A true GB829506A (en) 1960-03-02

Family

ID=9600447

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33929/57A Expired GB829506A (en) 1956-11-05 1957-10-30 Improvements in the manufacture of wood putp

Country Status (4)

Country Link
US (1) US2920010A (en)
DE (1) DE1062101B (en)
FR (2) FR1160482A (en)
GB (1) GB829506A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3393122A (en) * 1964-06-03 1968-07-16 Georgia Pacific Corp Pretreatment of green wood with reducing agent prior to storage

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3013934A (en) * 1958-08-12 1961-12-19 West Virginia Pulp & Paper Co High yield pulp from hardwoods
US3448003A (en) * 1966-01-03 1969-06-03 Dow Chemical Co On-stream cleaning of wood chip digesters using chelating agents
US3630832A (en) * 1969-11-10 1971-12-28 Int Paper Canada Controlled alkaline sulfite pulping
SE355614B (en) * 1970-05-13 1973-04-30 Mo Och Domsjoe Ab
ZA773044B (en) * 1976-06-02 1978-04-26 Australian Paper Manufacturers Improvements in pulping processes
JPS5374101A (en) * 1976-12-10 1978-07-01 Honshu Paper Co Ltd Pulp making method
US4181565A (en) * 1976-12-10 1980-01-01 Honshu Seishi Kabushiki Kaisha Process for cooking lignocellulosic material in the presence of hydroxyanthracenes and derivatives thereof
US5169496A (en) * 1991-04-23 1992-12-08 International Paper Company Method of producing multi-ply paper and board products exhibiting increased stiffness
IT201800005473A1 (en) * 2018-05-17 2019-11-17 HYDROSULPHITE STABILIZATION PROCESS

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE30072C (en) * A. FIEGEL und Dr. L. COHN i in Berlin Treatment of fibrous materials with! Solution of sulphurous acid, which is mixed with hydrochloric and acetic acid to increase its effectiveness
DE336535C (en) * 1919-12-02 1921-05-03 Zellstoff Und Papierfabrikatio Process for the production of the purest cellulose with a cotton or wool-like texture from vegetables using acidic sulphite liquors
US1859847A (en) * 1926-08-04 1932-05-24 Arthur M Hyde Pulped material and process of preparing the same
US1974751A (en) * 1934-01-06 1934-09-25 Brown Co Chemical pulping process
GB741980A (en) * 1951-03-22 1955-12-14 Asplund Arne J A Improvements in the manufacture of pulp from fibrous ligno-cellulose-containing materials

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3393122A (en) * 1964-06-03 1968-07-16 Georgia Pacific Corp Pretreatment of green wood with reducing agent prior to storage

Also Published As

Publication number Publication date
FR1160482A (en) 1958-07-16
US2920010A (en) 1960-01-05
FR72957E (en)
DE1062101B (en) 1959-07-23

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