SE0402583L - Unbleached pulp with very low COD - Google Patents

Unbleached pulp with very low COD

Info

Publication number
SE0402583L
SE0402583L SE0402583A SE0402583A SE0402583L SE 0402583 L SE0402583 L SE 0402583L SE 0402583 A SE0402583 A SE 0402583A SE 0402583 A SE0402583 A SE 0402583A SE 0402583 L SE0402583 L SE 0402583L
Authority
SE
Sweden
Prior art keywords
pulp
low cod
cod
unbleached pulp
unbleached
Prior art date
Application number
SE0402583A
Other languages
Swedish (sv)
Other versions
SE0402583D0 (en
Inventor
Michael D Vrbanac
Brian Wester
Brian E Dennis
Peter K Lau
Julie A Reimer
David W Bickell
Original Assignee
Weyerhaeuser Co
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
Priority claimed from PCT/US2002/015521 external-priority patent/WO2003097929A1/en
Application filed by Weyerhaeuser Co filed Critical Weyerhaeuser Co
Publication of SE0402583D0 publication Critical patent/SE0402583D0/en
Publication of SE0402583L publication Critical patent/SE0402583L/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B16/02—Cellulosic materials
    • 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
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Paper (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)

Abstract

A pulp product that has a low COD is comprised of an unbleached pulp that is soaked and washed in alkaline water for a sufficient time so that the COD after soaking and washing is less than or equal to 3.0kg/1000 kg of dry pulp . The pulp is produced by repetitively soaking and washing an unbleached pulp in alkaline water that is never allowed to drop below pH 7.0. The pulp is soake d and washed for a total of at least 400 minutes at an elevated temperature to produce the pulp product that has a low COD.
SE0402583A 2002-05-15 2004-10-26 Unbleached pulp with very low COD SE0402583L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2002/015521 WO2003097929A1 (en) 2002-05-15 2002-05-15 Very low cod unbleached pulp

Publications (2)

Publication Number Publication Date
SE0402583D0 SE0402583D0 (en) 2004-10-26
SE0402583L true SE0402583L (en) 2004-12-21

Family

ID=33476214

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0402583A SE0402583L (en) 2002-05-15 2004-10-26 Unbleached pulp with very low COD

Country Status (5)

Country Link
AU (1) AU2002309874B2 (en)
BR (1) BR0215713A (en)
CA (1) CA2482554A1 (en)
NO (1) NO20045383L (en)
SE (1) SE0402583L (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3148106A (en) * 1964-01-29 1964-09-08 Rayonier Inc Pulp refining
CA1127357A (en) * 1978-05-23 1982-07-13 Makoto Kikuiri Process for producing alkali pulp
DE60118951T2 (en) * 2000-10-17 2007-01-11 James Hardie International Finance B.V. METHOD FOR PRODUCING A FIBER-REINFORCED CEMENT COMPOSITE, COMPOSITE MATERIAL AND A MATERIAL APPROACH

Also Published As

Publication number Publication date
AU2002309874B2 (en) 2007-06-28
AU2002309874A1 (en) 2003-12-02
BR0215713A (en) 2005-02-22
SE0402583D0 (en) 2004-10-26
NO20045383L (en) 2004-12-09
CA2482554A1 (en) 2003-11-27

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Legal Events

Date Code Title Description
NAV Patent application has lapsed