ZA795541B - Use of cyclic keto compounds as additives in vapour phase pulping process - Google Patents

Use of cyclic keto compounds as additives in vapour phase pulping process

Info

Publication number
ZA795541B
ZA795541B ZA00795541A ZA795541A ZA795541B ZA 795541 B ZA795541 B ZA 795541B ZA 00795541 A ZA00795541 A ZA 00795541A ZA 795541 A ZA795541 A ZA 795541A ZA 795541 B ZA795541 B ZA 795541B
Authority
ZA
South Africa
Prior art keywords
additives
vapour phase
pulping process
keto compounds
cyclic keto
Prior art date
Application number
ZA00795541A
Other languages
English (en)
Inventor
H Holton
Original Assignee
Canadian Ind
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10500568&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ZA795541(B) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Canadian Ind filed Critical Canadian Ind
Publication of ZA795541B publication Critical patent/ZA795541B/xx

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
    • 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
ZA00795541A 1978-10-25 1979-10-17 Use of cyclic keto compounds as additives in vapour phase pulping process ZA795541B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7841856 1978-10-25

Publications (1)

Publication Number Publication Date
ZA795541B true ZA795541B (en) 1980-10-29

Family

ID=10500568

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00795541A ZA795541B (en) 1978-10-25 1979-10-17 Use of cyclic keto compounds as additives in vapour phase pulping process

Country Status (11)

Country Link
EP (1) EP0010451A1 (fi)
JP (1) JPS5562289A (fi)
AU (1) AU528368B2 (fi)
BR (1) BR7906873A (fi)
CA (1) CA1132763A (fi)
ES (1) ES485352A1 (fi)
FI (1) FI793317A (fi)
NO (1) NO793363L (fi)
NZ (1) NZ191815A (fi)
PT (1) PT70365A (fi)
ZA (1) ZA795541B (fi)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984003527A1 (fr) * 1983-03-02 1984-09-13 Nivelleau Bruniere Patrick M F Procede de traitement de matieres ligno-cellulosique pour l'obtention de cellulose.
SE510775C2 (sv) * 1996-09-26 1999-06-21 Kvaerner Pulping Tech Svavelfri kokning av kemisk massa
US6325892B1 (en) 1998-09-23 2001-12-04 University Of New Brunswick Method of delignifying sulphite pulp with oxygen and borohydride

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3215588A (en) * 1963-08-15 1965-11-02 Lummus Co Continuous impregnation, cooking, and washing of fibrous material
CA986662A (en) * 1973-05-01 1976-04-06 David L. Mccandless Pretreatment of lignocellulosic material with anthraquinone salts in alkaline pulping
US4036680A (en) * 1976-12-14 1977-07-19 Canadian Industries, Ltd. Delignification of lignocellulosic material with a soda pulping liquor containing a Diels Alder adduct of benzoquinone or naphthoquinone in admixture with a nitro aromatic compound
US4127439A (en) * 1977-01-28 1978-11-28 Crown Zellerbach Corporation Pretreatment of lignocellulose with anthraquinone prior to pulping

Also Published As

Publication number Publication date
PT70365A (en) 1979-11-01
AU528368B2 (en) 1983-04-28
FI793317A (fi) 1980-04-26
EP0010451A1 (en) 1980-04-30
ES485352A1 (es) 1980-07-01
BR7906873A (pt) 1980-06-03
JPS5562289A (en) 1980-05-10
NZ191815A (en) 1982-02-23
AU5189879A (en) 1980-05-01
CA1132763A (en) 1982-10-05
NO793363L (no) 1980-04-28

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