CA1132763A - Use of cyclic keto compounds as additives in vapor phase pulping process - Google Patents

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

Info

Publication number
CA1132763A
CA1132763A CA337,139A CA337139A CA1132763A CA 1132763 A CA1132763 A CA 1132763A CA 337139 A CA337139 A CA 337139A CA 1132763 A CA1132763 A CA 1132763A
Authority
CA
Canada
Prior art keywords
liquor
anthraquinone
cyclic keto
keto compound
lignocellulosic material
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
CA337,139A
Other languages
English (en)
French (fr)
Inventor
Harry H. Holton
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.)
Pioneer Licensing Inc
Original Assignee
CIL Inc
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=CA1132763(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by CIL Inc filed Critical CIL Inc
Application granted granted Critical
Publication of CA1132763A publication Critical patent/CA1132763A/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
    • 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

Landscapes

  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
CA337,139A 1978-10-25 1979-10-05 Use of cyclic keto compounds as additives in vapor phase pulping process Expired CA1132763A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7841856 1978-10-25
GB41856/78 1978-10-25

Publications (1)

Publication Number Publication Date
CA1132763A true CA1132763A (en) 1982-10-05

Family

ID=10500568

Family Applications (1)

Application Number Title Priority Date Filing Date
CA337,139A Expired CA1132763A (en) 1978-10-25 1979-10-05 Use of cyclic keto compounds as additives in vapor phase pulping process

Country Status (11)

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

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
ZA795541B (en) 1980-10-29
AU5189879A (en) 1980-05-01
NO793363L (no) 1980-04-28

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Legal Events

Date Code Title Description
MKEX Expiry