FI51114C - Preparation of cellulose pulp by a multi-stage ammonia-polysulfide process. - Google Patents

Preparation of cellulose pulp by a multi-stage ammonia-polysulfide process.

Info

Publication number
FI51114C
FI51114C FI702507A FI250770A FI51114C FI 51114 C FI51114 C FI 51114C FI 702507 A FI702507 A FI 702507A FI 250770 A FI250770 A FI 250770A FI 51114 C FI51114 C FI 51114C
Authority
FI
Finland
Prior art keywords
preparation
cellulose pulp
stage ammonia
polysulfide process
polysulfide
Prior art date
Application number
FI702507A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI51114B (en
Inventor
David W Clayton
Asahi Sakai
Original Assignee
Pulp Paper Res Inst
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 Paper Res Inst filed Critical Pulp Paper Res Inst
Application granted granted Critical
Publication of FI51114B publication Critical patent/FI51114B/fi
Publication of FI51114C publication Critical patent/FI51114C/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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds
FI702507A 1969-10-08 1970-09-11 Preparation of cellulose pulp by a multi-stage ammonia-polysulfide process. FI51114C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US86474069A 1969-10-08 1969-10-08

Publications (2)

Publication Number Publication Date
FI51114B FI51114B (en) 1976-06-30
FI51114C true FI51114C (en) 1976-10-11

Family

ID=25343957

Family Applications (1)

Application Number Title Priority Date Filing Date
FI702507A FI51114C (en) 1969-10-08 1970-09-11 Preparation of cellulose pulp by a multi-stage ammonia-polysulfide process.

Country Status (4)

Country Link
US (1) US3661698A (en)
FI (1) FI51114C (en)
NO (1) NO130020B (en)
SE (1) SE354301B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1013903A (en) * 1973-06-04 1977-07-19 Union Camp Corporation Method of pulping with polysulfide
US5041192A (en) * 1988-09-16 1991-08-20 University Of South Florida Supercritical delignification of wood
US7828930B2 (en) * 2007-11-20 2010-11-09 International Paper Company Use of polysulfide in modified cooking
FI127420B (en) * 2011-06-23 2018-05-31 Andritz Oy Process for producing cellulose pulp
US20190226142A1 (en) * 2018-01-19 2019-07-25 Jim Constantacos Method for improved pulping using an environmentally friendly pulping aid

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2944928A (en) * 1957-09-20 1960-07-12 Kibrick Method of preparing paper pulp

Also Published As

Publication number Publication date
US3661698A (en) 1972-05-09
SE354301B (en) 1973-03-05
NO130020B (en) 1974-06-24
FI51114B (en) 1976-06-30

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Legal Events

Date Code Title Description
BB Publication of examined application