DE69722226D1 - SULFUR-FREE METHOD FOR PRODUCING A CHEMICAL CELL - Google Patents

SULFUR-FREE METHOD FOR PRODUCING A CHEMICAL CELL

Info

Publication number
DE69722226D1
DE69722226D1 DE69722226T DE69722226T DE69722226D1 DE 69722226 D1 DE69722226 D1 DE 69722226D1 DE 69722226 T DE69722226 T DE 69722226T DE 69722226 T DE69722226 T DE 69722226T DE 69722226 D1 DE69722226 D1 DE 69722226D1
Authority
DE
Germany
Prior art keywords
producing
pulp
cooking
raw materials
impregnation stage
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 - Lifetime
Application number
DE69722226T
Other languages
German (de)
Inventor
Soeren Gustavsson
Christer Fahlgren
Bo Boder
Ewa Westlund-Johansson
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.)
Metso Fiber Karlstad AB
Original Assignee
Kvaerner Pulping AB
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 Kvaerner Pulping AB filed Critical Kvaerner Pulping AB
Application granted granted Critical
Publication of DE69722226D1 publication Critical patent/DE69722226D1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes

Abstract

The invention relates to a process for producing chemical pulp from comminuted cellulose-containing material without using sulphur-containing cooking liquids, thereby removing the problems, for example smell problems, which are associated with sulphur-containing liquids. The process comprises at least one impregnation stage followed by at least one cooking stage, with a delignification-accelerating compound being supplied to at least one of the said stages. In the process, a first cooking liquid, which has been extracted from a position downstream of the impregnation stage, which liquid primarily contains OH<-> ions as the active substance, is supplied to the impregnation stage. This makes it possible to achieve a higher concentration of OH<-> ions than in the case of conventional soda-anthraquinone cooking and to use a lower process temperature. The process is suitable for producing chemical pulp from essentially all generally available raw materials for cellulose production and also for producing pulp from non-Scandinavian raw materials as well as for producing pulp from alternative fibrous raw materials. The process is suitable both for producing pulp which is intended for ECF bleaching or TCF bleaching and for producing unbleached high-yield pulp.
DE69722226T 1996-09-26 1997-09-25 SULFUR-FREE METHOD FOR PRODUCING A CHEMICAL CELL Expired - Lifetime DE69722226D1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9603518A SE510775C2 (en) 1996-09-26 1996-09-26 Sulfur-free cooking of chemical pulp
PCT/SE1997/001610 WO1998013547A1 (en) 1996-09-26 1997-09-25 Cooking of chemical pulp in sulphur-free liquor containing a delignification-accelerating compound

Publications (1)

Publication Number Publication Date
DE69722226D1 true DE69722226D1 (en) 2003-06-26

Family

ID=20404039

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69722226T Expired - Lifetime DE69722226D1 (en) 1996-09-26 1997-09-25 SULFUR-FREE METHOD FOR PRODUCING A CHEMICAL CELL

Country Status (5)

Country Link
EP (1) EP0928349B1 (en)
AT (1) ATE241033T1 (en)
DE (1) DE69722226D1 (en)
SE (1) SE510775C2 (en)
WO (1) WO1998013547A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6241851B1 (en) 1998-03-03 2001-06-05 Andritz-Ahlstrom Inc. Treatment of cellulose material with additives while producing cellulose pulp
CA2318027C (en) 1999-09-13 2008-07-08 Andritz-Ahlstrom Inc. Treating pulp with yield or strength-enhancing additive
CN105200838A (en) * 2015-09-18 2015-12-30 新疆国力源投资有限公司 Method of preparing bamboo willow bleaching pulp

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
AU516988B2 (en) * 1977-05-02 1981-07-02 Australian Paper Manufacturers Limited Alkaline pulping process
CA1132763A (en) * 1978-10-25 1982-10-05 Harry H. Holton Use of cyclic keto compounds as additives in vapor phase pulping process
SE502667C2 (en) * 1993-07-12 1995-12-04 Kvaerner Pulping Tech Treatment of fiber material with complexing agents before cooking

Also Published As

Publication number Publication date
ATE241033T1 (en) 2003-06-15
EP0928349A1 (en) 1999-07-14
SE510775C2 (en) 1999-06-21
WO1998013547A1 (en) 1998-04-02
EP0928349B1 (en) 2003-05-21
SE9603518D0 (en) 1996-09-26
SE9603518L (en) 1998-03-27

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Legal Events

Date Code Title Description
8332 No legal effect for de