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BR9506974A - Improvement in a batch-type digestion process using rapid displacement heating to produce delignified pulp - Google Patents

Improvement in a batch-type digestion process using rapid displacement heating to produce delignified pulp

Info

Publication number
BR9506974A
BR9506974A BR9506974A BR9506974A BR9506974A BR 9506974 A BR9506974 A BR 9506974A BR 9506974 A BR9506974 A BR 9506974A BR 9506974 A BR9506974 A BR 9506974A BR 9506974 A BR9506974 A BR 9506974A
Authority
BR
Brazil
Prior art keywords
batch
improvement
cooking
digestion process
rapid displacement
Prior art date
Application number
BR9506974A
Other languages
Portuguese (pt)
Inventor
Nam Hee Shin
Original Assignee
Beloit Technologies 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
Application filed by Beloit Technologies Inc filed Critical Beloit Technologies Inc
Publication of BR9506974A publication Critical patent/BR9506974A/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
    • D21C11/0021—Introduction of various effluents, e.g. waste waters, into the pulping, recovery and regeneration cycle (closed-cycle)
    • 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
    • D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds
    • 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

  • Paper (AREA)
  • Pens And Brushes (AREA)
  • Primary Cells (AREA)
  • Dental Preparations (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Glass Compositions (AREA)
  • Secondary Cells (AREA)
  • Peptides Or Proteins (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)

Abstract

A method for improving pulp brightness utilizes a combination of a distributed total white liquor charge during the warm fill, hot fill and cooking stages of a batch cooking process and low cooking temperatures during the cooking stage. The high total white liquor charge ranges between 15 % AA &tilde& 35 % AA, while the cooking temperatures range between 150 &tilde& 168 DEG C._________________________
BR9506974A 1994-03-04 1995-03-02 Improvement in a batch-type digestion process using rapid displacement heating to produce delignified pulp BR9506974A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US20649694A 1994-03-04 1994-03-04
PCT/US1995/002719 WO1995023891A1 (en) 1994-03-04 1995-03-02 Impact of temperature and alkali charge on pulp brightness

Publications (1)

Publication Number Publication Date
BR9506974A true BR9506974A (en) 1997-09-16

Family

ID=22766657

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9506974A BR9506974A (en) 1994-03-04 1995-03-02 Improvement in a batch-type digestion process using rapid displacement heating to produce delignified pulp

Country Status (19)

Country Link
EP (1) EP0748412B1 (en)
JP (1) JP2876428B2 (en)
CN (1) CN1143398A (en)
AT (1) ATE172503T1 (en)
AU (1) AU684623B2 (en)
BR (1) BR9506974A (en)
CA (1) CA2184706C (en)
DE (1) DE69505503T2 (en)
ES (1) ES2126263T3 (en)
FI (1) FI118348B (en)
MX (1) MX9603876A (en)
NO (1) NO963520L (en)
NZ (1) NZ282616A (en)
PL (1) PL316144A1 (en)
RO (1) RO117929B1 (en)
RU (1) RU2127342C1 (en)
TW (1) TW270159B (en)
WO (1) WO1995023891A1 (en)
ZA (1) ZA951777B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI970254A (en) * 1997-01-22 1998-07-23 Ahlstrom Machinery Oy Method and apparatus for cooking pulp
US6139689A (en) * 1997-06-11 2000-10-31 Beloit Technologies, Inc. Apparatus for digesting pulp in a displacement batch digester that uses displacement liquor having a sufficient hydrostatic head
FI20001351A0 (en) * 2000-06-06 2000-06-06 Valmet Chemical Pulping Oy Eräkeittomenetelmä
SE529475C2 (en) * 2006-11-22 2007-08-21 Metso Fiber Karlstad Ab Recovery of heat from black liquor during pulp production process, comprises supplying black liquor and bleaching filtrate to heat exchanger
KR20110123184A (en) 2010-05-06 2011-11-14 바히아 스페셜티 셀룰로스 에스에이 Method and system for producing high alpha dissolving pulp
CN103757961B (en) * 2013-12-30 2016-01-20 汶瑞机械(山东)有限公司 A kind of batch cooking device and liquid distributing method thereof
US9644317B2 (en) 2014-11-26 2017-05-09 International Paper Company Continuous digester and feeding system
FI129440B (en) * 2020-01-15 2022-02-28 Chempolis Oy Cooking equipment and method for treating biomass containing lignocellulose

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1687076A (en) * 1927-10-12 1928-10-09 Venning D Simons Process for cooking wood chips by the alkaline process of pulp manufacture
US4578149A (en) * 1981-03-05 1986-03-25 Fagerlund Bertil K E Process for digesting cellulosic material with heat recovery
JPS6059189A (en) * 1983-08-24 1985-04-05 ベロイト　コ−ポレ−ション Multi-stage digestion of wood pulp
SU1498857A1 (en) * 1987-07-17 1989-08-07 Сибирский научно-исследовательский институт целлюлозы и картона Method of alkaline digestion of pulp in intermittent-action digesters

Also Published As

Publication number Publication date
FI963448L (en) 1996-09-03
FI118348B (en) 2007-10-15
RU2127342C1 (en) 1999-03-10
DE69505503D1 (en) 1998-11-26
PL316144A1 (en) 1996-12-23
EP0748412A1 (en) 1996-12-18
AU1978995A (en) 1995-09-18
NZ282616A (en) 1997-05-26
CN1143398A (en) 1997-02-19
MX9603876A (en) 1997-03-29
DE69505503T2 (en) 1999-10-21
JP2876428B2 (en) 1999-03-31
RO117929B1 (en) 2002-09-30
TW270159B (en) 1996-02-11
FI963448A0 (en) 1996-09-03
CA2184706C (en) 2001-10-30
EP0748412B1 (en) 1998-10-21
ATE172503T1 (en) 1998-11-15
CA2184706A1 (en) 1995-09-08
NO963520L (en) 1996-08-23
ES2126263T3 (en) 1999-03-16
ZA951777B (en) 1995-12-11
AU684623B2 (en) 1997-12-18
WO1995023891A1 (en) 1995-09-08
JPH09505115A (en) 1997-05-20

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Legal Events

Date Code Title Description
FB36 Technical and formal requirements: requirement - article 36 of industrial property law
FF Decision: intention to grant
FG9A Patent or certificate of addition granted
B25G Requested change of headquarter approved

Owner name: BELOIT TECHNOLOGIES, INC. (US)

Free format text: SEDE ALTERADA CONFORME SOLICITADO NA PETICAO NO 020040009503/RJ DE 16/11/04.

B25A Requested transfer of rights approved

Owner name: GLANDV MANAGEMENT HUNGARY KFT (HU)

Free format text: TRANSFERIDO DE: BELOIT TECHNOLOGIES, INC.

B21A Patent or certificate of addition expired [chapter 21.1 patent gazette]

Free format text: PATENTE EXTINTA EM 02/03/2015