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GB1526621A - Delignification process - Google Patents

Delignification process

Info

Publication number
GB1526621A
GB1526621A GB537477A GB537477A GB1526621A GB 1526621 A GB1526621 A GB 1526621A GB 537477 A GB537477 A GB 537477A GB 537477 A GB537477 A GB 537477A GB 1526621 A GB1526621 A GB 1526621A
Authority
GB
United Kingdom
Prior art keywords
lignocellulosic material
deliquified
liquor
dioxo
anthraquinone
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
GB537477A
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
Application filed by Canadian Industries Ltd filed Critical Canadian Industries Ltd
Priority to GB537477A priority Critical patent/GB1526621A/en
Publication of GB1526621A publication Critical patent/GB1526621A/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)

Abstract

1526621 Pulp manufacture CANADIAN INDUSTRIES Ltd 9 Feb 1977 05374/77 Heading D2W A process for deliquifying lignocellulosic material comprises treating the lignocellulosic material in a closed reaction vessel with an alkaline pulping liquor containing from 0.001% to 10% by wt. based on the lignocellulosic material of a cyclic keto compound selected from naphthaquinone, anthraquinone, phenanthraquinone, the alkyl, alkoxy, and amino derivatives of said quinones, 6. 11-dioxo-lH-anthra-[l, 2-c] pyrazole, anthraquinone-1, 2-naphtha-acridone, 7, 12-dioxo-7, 12- dihydroanthra [1, 2-b] pyrazine, 1, 2-benzanthraquinone, anthrone and 10-methylene anthrone, the treatment taking place at a temperalure in the range of from 150‹C to 200‹C for 0.5 to 480 minutes and displacing the pulping liquor from the partially deliquified lignocellulosic material with water or an aqueous liquor inert thereto. The alkaline pulping liquor may be a soda, kraft, or polysulphide liquor. The deliquified material may be subjected to further treatment with alkali and oxygen. A magnesium salt e.g. MgCl 2 or MgSO 4 may be added during the further treatment stage. The deliquified material may be bleached by a conventional process.
GB537477A 1977-03-09 1977-03-09 Delignification process Expired GB1526621A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB537477A GB1526621A (en) 1977-03-09 1977-03-09 Delignification process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB537477A GB1526621A (en) 1977-03-09 1977-03-09 Delignification process

Publications (1)

Publication Number Publication Date
GB1526621A true GB1526621A (en) 1978-09-27

Family

ID=9794934

Family Applications (1)

Application Number Title Priority Date Filing Date
GB537477A Expired GB1526621A (en) 1977-03-09 1977-03-09 Delignification process

Country Status (1)

Country Link
GB (1) GB1526621A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993022492A1 (en) * 1992-05-05 1993-11-11 Granit S.A. Production of cellulose by the soda-anthraquinone process (sap) with recovery of the boiling chemicals
US5728265A (en) * 1995-06-12 1998-03-17 Henkel Corporation Process for enhancing white liquor penetration into wood chips by contacting the chips with a mixture of the white liquor and a polymethylalkyl siloxane
WO2001032715A1 (en) * 1999-11-02 2001-05-10 Waste Energy Integrated Sytems, Llc Process for the production of organic products from lignocellulose containing biomass sources
US6409841B1 (en) 1999-11-02 2002-06-25 Waste Energy Integrated Systems, Llc. Process for the production of organic products from diverse biomass sources

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993022492A1 (en) * 1992-05-05 1993-11-11 Granit S.A. Production of cellulose by the soda-anthraquinone process (sap) with recovery of the boiling chemicals
AU663784B2 (en) * 1992-05-05 1995-10-19 Granit S.A. Production of cellulose and recovery of chemicals
US5595628A (en) * 1992-05-05 1997-01-21 Grant S.A. Production of pulp by the soda-anthraquinone process (SAP) with recovery of the cooking chemicals
US5728265A (en) * 1995-06-12 1998-03-17 Henkel Corporation Process for enhancing white liquor penetration into wood chips by contacting the chips with a mixture of the white liquor and a polymethylalkyl siloxane
WO2001032715A1 (en) * 1999-11-02 2001-05-10 Waste Energy Integrated Sytems, Llc Process for the production of organic products from lignocellulose containing biomass sources
US6409841B1 (en) 1999-11-02 2002-06-25 Waste Energy Integrated Systems, Llc. Process for the production of organic products from diverse biomass sources

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930209