ES485352A1 - Process for the delignification of lignocellulosic material and products thereof. - Google Patents

Process for the delignification of lignocellulosic material and products thereof.

Info

Publication number
ES485352A1
ES485352A1 ES485352A ES485352A ES485352A1 ES 485352 A1 ES485352 A1 ES 485352A1 ES 485352 A ES485352 A ES 485352A ES 485352 A ES485352 A ES 485352A ES 485352 A1 ES485352 A1 ES 485352A1
Authority
ES
Spain
Prior art keywords
lignocellulosic material
delignification
products
impregnated
keto compound
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
ES485352A
Other languages
Spanish (es)
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.)
PPG Architectural Coatings Canada Inc
Original Assignee
Canadian Industries Ltd
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=ES485352(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Canadian Industries Ltd filed Critical Canadian Industries Ltd
Publication of ES485352A1 publication Critical patent/ES485352A1/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)

Abstract

There is disclosed a process for the delignification of lignocellulosic material by treatment with an alkaline liquor in the presence of a cyclic keto compound such as anthraquinone. The lignocellulosic material in subdivided form is first impregnated with the alkaline liquor containing a suitable amount of the cyclic keto compound whereafter any excess liquor is drained. The impregnated material is then cooked by heating. The delignified products are suitable for the manufacture of paper.
ES485352A 1978-10-25 1979-10-25 Process for the delignification of lignocellulosic material and products thereof. Expired ES485352A1 (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
ES485352A1 true ES485352A1 (en) 1980-07-01

Family

ID=10500568

Family Applications (1)

Application Number Title Priority Date Filing Date
ES485352A Expired ES485352A1 (en) 1978-10-25 1979-10-25 Process for the delignification of lignocellulosic material and products thereof.

Country Status (11)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984003527A1 (en) * 1983-03-02 1984-09-13 Nivelleau Bruniere Patrick M F Method for treating lignocellulose materials to obtain cellulose
SE510775C2 (en) * 1996-09-26 1999-06-21 Kvaerner Pulping Tech Sulfur-free cooking of chemical pulp
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 (en) 1980-04-26
EP0010451A1 (en) 1980-04-30
BR7906873A (en) 1980-06-03
JPS5562289A (en) 1980-05-10
NZ191815A (en) 1982-02-23
ZA795541B (en) 1980-10-29
AU5189879A (en) 1980-05-01
CA1132763A (en) 1982-10-05
NO793363L (en) 1980-04-28

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