GB971979A - Improvements in cold caustic refining of cellulose - Google Patents

Improvements in cold caustic refining of cellulose

Info

Publication number
GB971979A
GB971979A GB19996/63A GB1999663A GB971979A GB 971979 A GB971979 A GB 971979A GB 19996/63 A GB19996/63 A GB 19996/63A GB 1999663 A GB1999663 A GB 1999663A GB 971979 A GB971979 A GB 971979A
Authority
GB
United Kingdom
Prior art keywords
cellulose
cold caustic
caustic
cold
borax
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
GB19996/63A
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.)
Rayonier Inc
Original Assignee
Rayonier 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 Rayonier Inc filed Critical Rayonier Inc
Publication of GB971979A publication Critical patent/GB971979A/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
    • 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
    • D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
    • D21C9/083—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching with inorganic compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B1/00—Preparatory treatment of cellulose for making derivatives thereof, e.g. pre-treatment, pre-soaking, activation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Processing Of Solid Wastes (AREA)
  • Paper (AREA)

Abstract

In the cold caustic purification of cellulose, there is included in the caustic solution a boron compound selected from the group consisting of sodium metaborate, borax and boric acid, in a proportion sufficient to prevent mercerization of the cellulose. A non-mercerized, cold caustic refined, high alpha cellulose may be made from unbleached or partially bleached cellulosic material, especially wood-pulp, by means of a multi-stage refining process in which the cold caustic refining stage comprises subjecting said cellulosic material to an aqueous caustic solution at a temperature of from 5 DEG C. to 50 DEG C. containing from 10-16% by weight total titratable alkali and 6-28% by weight of a soluble borate compound of the group consisting of sodium metaborate, borax and boric acid, said proportion of borate being expressed as sodium tetraborate. Preferably, a temperature of about 35 DEG C. is used. Such refined cellulose has an alpha content in excess of 96% and is substantially all Cellulose I.
GB19996/63A 1963-02-25 1963-05-20 Improvements in cold caustic refining of cellulose Expired GB971979A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US260822A US3305433A (en) 1963-02-25 1963-02-25 Cold caustic refining of cellulose

Publications (1)

Publication Number Publication Date
GB971979A true GB971979A (en) 1964-10-07

Family

ID=22990760

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19996/63A Expired GB971979A (en) 1963-02-25 1963-05-20 Improvements in cold caustic refining of cellulose

Country Status (9)

Country Link
US (1) US3305433A (en)
AT (1) AT253916B (en)
BE (1) BE633461A (en)
CH (1) CH423743A (en)
DE (1) DE1243506B (en)
ES (1) ES288376A1 (en)
FI (1) FI42033B (en)
GB (1) GB971979A (en)
NL (1) NL293231A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA024458B1 (en) * 2014-05-19 2016-09-30 Сумгаитский Государственный Университет Process for cellulose activation

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1792227B1 (en) * 1968-02-02 1971-10-28 Eastman Kodak Co Process for converting unbleached sulphite pulp into an esterification-pure pulp
USRE32408E (en) * 1982-09-29 1987-04-28 Masonite Corporation Lignosulfonate-phenol-formaldehyde resin binder
US6716310B2 (en) 2001-12-31 2004-04-06 Kimberly-Clark Worldwide, Inc. Process for manufacturing a cellulosic paper product exhibiting reduced malodor
US7854847B2 (en) * 2006-11-09 2010-12-21 Rayonier Trs Holdings Inc. Process of purifying wood pulp with caustic-borate solution and recovering the purifying chemical

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE379997A (en) * 1930-07-26
US1935580A (en) * 1930-09-06 1933-11-14 Brown Co Processing of cellulose fiber
US3068141A (en) * 1959-09-10 1962-12-11 Eastman Kodak Co Method of refining kraft wood pulp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA024458B1 (en) * 2014-05-19 2016-09-30 Сумгаитский Государственный Университет Process for cellulose activation

Also Published As

Publication number Publication date
US3305433A (en) 1967-02-21
CH423743A (en) 1966-11-15
NL293231A (en)
DE1243506B (en) 1967-06-29
FI42033B (en) 1969-12-31
AT253916B (en) 1967-04-25
BE633461A (en)
ES288376A1 (en) 1963-12-01

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