CA873778A - Vapour phase alkaline pulping process - Google Patents

Vapour phase alkaline pulping process

Info

Publication number
CA873778A
CA873778A CA873778A CA873778DA CA873778A CA 873778 A CA873778 A CA 873778A CA 873778 A CA873778 A CA 873778A CA 873778D A CA873778D A CA 873778DA CA 873778 A CA873778 A CA 873778A
Authority
CA
Canada
Prior art keywords
vapour phase
pulping process
alkaline pulping
phase alkaline
vapour
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
CA873778A
Inventor
W. Clayton David
Sakai Asahi
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.)
Pulp and Paper Research Institute of Canada
Original Assignee
Pulp and Paper Research Institute of Canada
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 Pulp and Paper Research Institute of Canada filed Critical Pulp and Paper Research Institute of Canada
Application granted granted Critical
Publication of CA873778A publication Critical patent/CA873778A/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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds
CA873778A 1969-12-09 1969-12-12 Vapour phase alkaline pulping process Expired CA873778A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US88347069A 1969-12-09 1969-12-09
CA69706 1969-12-12

Publications (1)

Publication Number Publication Date
CA873778A true CA873778A (en) 1971-06-22

Family

ID=25666225

Family Applications (1)

Application Number Title Priority Date Filing Date
CA873778A Expired CA873778A (en) 1969-12-09 1969-12-12 Vapour phase alkaline pulping process

Country Status (2)

Country Link
US (1) US3664918A (en)
CA (1) CA873778A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4152197A (en) * 1974-09-23 1979-05-01 Mo Och Domsjo Ab Process for preparing high-yield cellulose pulps by vapor phase pulping an unpulped portion of lignocellulosic material and a partially chemically pulped portion
JPS597439B2 (en) * 1980-07-31 1984-02-18 株式会社日立製作所 Pretreatment method for cellulosic substances
WO1984003527A1 (en) * 1983-03-02 1984-09-13 Nivelleau Bruniere Patrick M F Method for treating lignocellulose materials to obtain cellulose
US6248208B1 (en) 1995-06-02 2001-06-19 Andritz-Ahlstrom Inc. Pretreatment of chips before cooking
US5736006A (en) * 1996-10-10 1998-04-07 Ahlstrom Machinery Inc. Method and apparatus for pulping with controlled heating to improve delignification and pulp strength
US6153052A (en) * 1998-10-09 2000-11-28 Pulp And Paper Research Institute Of Canada Pulping process
FI20002587A (en) * 2000-11-24 2002-05-25 Metso Paper Inc Alkaline cooking method for fibrous material
FI20002586A (en) * 2000-11-24 2002-05-25 Metso Paper Inc Process for alkaline batching when cooking fiber material
AU2003291874A1 (en) * 2003-06-03 2005-01-21 David Tarasenko Method for producing pulp and lignin

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1810398A (en) * 1929-05-27 1931-06-16 Paul E Hodgdon Method of and apparatus for digesting wood
US2093267A (en) * 1934-11-20 1937-09-14 Chemipulp Process Inc Treatment of fibrous material
US2673690A (en) * 1951-10-27 1954-03-30 Hercules Powder Co Ltd Method for the digestion of cellulose-bearing material
US3215588A (en) * 1963-08-15 1965-11-02 Lummus Co Continuous impregnation, cooking, and washing of fibrous material

Also Published As

Publication number Publication date
US3664918A (en) 1972-05-23

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