ZA973887B - Batch process for preparing improved kraft pulp. - Google Patents

Batch process for preparing improved kraft pulp.

Info

Publication number
ZA973887B
ZA973887B ZA9703887A ZA973887A ZA973887B ZA 973887 B ZA973887 B ZA 973887B ZA 9703887 A ZA9703887 A ZA 9703887A ZA 973887 A ZA973887 A ZA 973887A ZA 973887 B ZA973887 B ZA 973887B
Authority
ZA
South Africa
Prior art keywords
batch process
kraft pulp
derivative
preparing improved
green liquor
Prior art date
Application number
ZA9703887A
Inventor
Panu Tikka
Mikael Svedman
Original Assignee
Sunds Defibrator Pori Oy
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 Sunds Defibrator Pori Oy filed Critical Sunds Defibrator Pori Oy
Publication of ZA973887B publication Critical patent/ZA973887B/en

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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0064—Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green liquor
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Reinforced Plastic Materials (AREA)
  • Secondary Cells (AREA)

Abstract

An improved batch process for preparing kraft pulp is disclosed, wherein a portion of green liquor or a derivative thereof is introduced in the impregnation or/and pretreatment stage. The derivative may be mother liquor originating from crystallization of carbonate from green liquor. The procedure facilitates the use of mild conditions in the final cooking stage and short cooking periods and results in higher pulp quality, high production output and good maintenance of the balance of chemicals in the mill. <IMAGE>
ZA9703887A 1996-05-30 1997-05-06 Batch process for preparing improved kraft pulp. ZA973887B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI962260A FI105929B (en) 1996-05-30 1996-05-30 An improved batch process for the preparation of sulphate cellulose

Publications (1)

Publication Number Publication Date
ZA973887B true ZA973887B (en) 1998-02-25

Family

ID=8546116

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA9703887A ZA973887B (en) 1996-05-30 1997-05-06 Batch process for preparing improved kraft pulp.

Country Status (16)

Country Link
EP (1) EP0810321B1 (en)
JP (1) JPH1053989A (en)
CN (1) CN1109160C (en)
AT (1) ATE202167T1 (en)
AU (1) AU721440B2 (en)
BR (1) BR9703156A (en)
CA (1) CA2203096C (en)
DE (1) DE69705160T2 (en)
ES (1) ES2159385T3 (en)
FI (1) FI105929B (en)
ID (1) ID18445A (en)
NO (1) NO972456L (en)
NZ (1) NZ314898A (en)
PT (1) PT810321E (en)
RU (1) RU2128259C1 (en)
ZA (1) ZA973887B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6103057A (en) * 1997-06-11 2000-08-15 Fagerlund; Bertil K. Kraft digesting process wherein a vapor interface is formed by withdrawing hot cooking liquor
FI120361B (en) * 2003-12-31 2009-09-30 Gl & V Finance Hungary Kft Batch cooking process for the production of kraft pulp
CA2651483C (en) * 2006-05-19 2013-06-18 Raymond Francis Methods for carbonate pretreatment and pulping of cellulosic material
SE531632C2 (en) * 2007-12-20 2009-06-09 Metso Fiber Karlstad Ab Process of manufacture of sulphate pulp in which hemicelluloses are recycled
KR20110123184A (en) 2010-05-06 2011-11-14 바히아 스페셜티 셀룰로스 에스에이 Method and system for high alpha dissolving pulp production
CA2744250C (en) * 2010-05-04 2016-10-11 Bahia Specialty Cellulose Sa Method and system for pulp processing using cold caustic extraction with alkaline filtrate reuse
RU2535804C2 (en) * 2010-05-04 2014-12-20 Байа Спешалти Сельюлоз Са Method and system of producing soluble cellulose mass with high content of alpha-cellulose
AU2010202496B2 (en) * 2010-05-04 2015-04-16 Bahia Specialty Cellulose Sa Method and system for high alpha dissolving pulp production
EP2592186A1 (en) * 2011-11-08 2013-05-15 Södra Cell AB Kraft pulping process
CN104452389B (en) * 2014-11-04 2017-02-15 中国轻工业南宁设计工程有限公司 Energy-saving pulping cooking sequence interlock control system
CN104988781B (en) * 2015-08-11 2017-01-18 湛江晨鸣浆纸有限公司 Wood chip pulping process

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55103386A (en) * 1979-01-29 1980-08-07 Sanyo Kokusaku Pulp Co Two stage sulphate digesting method
FI92224C (en) * 1991-06-28 1994-10-10 Sunds Defibrator Rauma Oy Batch process for the production of cogeneration
GB9117936D0 (en) * 1991-08-20 1991-10-09 Canada Inc Production of sodium hydroxide
SE500748C2 (en) * 1992-10-12 1994-08-22 Bertil Pettersson Chemical recycling process in a sulphate pulp mill for the production of a high-sulfide white liquor and a low-sulfide white liquor
FI95608B (en) * 1994-06-17 1995-11-15 Ahlstroem Oy Process for preparing coke liquor by crystallization of green liquor
US5674359A (en) * 1995-02-08 1997-10-07 Ahlstrom Machinery Inc. Continuous cooking of cellulosic fibrous material with cold alkali impregnation

Also Published As

Publication number Publication date
DE69705160D1 (en) 2001-07-19
RU2128259C1 (en) 1999-03-27
JPH1053989A (en) 1998-02-24
FI962260A (en) 1997-12-01
ATE202167T1 (en) 2001-06-15
ID18445A (en) 1998-04-09
NO972456L (en) 1997-12-01
FI962260A0 (en) 1996-05-30
FI105929B (en) 2000-10-31
AU721440B2 (en) 2000-07-06
DE69705160T2 (en) 2002-05-16
NZ314898A (en) 1998-06-26
CN1109160C (en) 2003-05-21
AU2016297A (en) 1997-12-04
EP0810321A1 (en) 1997-12-03
CN1170795A (en) 1998-01-21
NO972456D0 (en) 1997-05-29
ES2159385T3 (en) 2001-10-01
BR9703156A (en) 1998-10-27
EP0810321B1 (en) 2001-06-13
CA2203096C (en) 2005-06-28
PT810321E (en) 2001-10-31
CA2203096A1 (en) 1997-11-30

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