FI71177C - Blekning av massa - Google Patents

Blekning av massa Download PDF

Info

Publication number
FI71177C
FI71177C FI791681A FI791681A FI71177C FI 71177 C FI71177 C FI 71177C FI 791681 A FI791681 A FI 791681A FI 791681 A FI791681 A FI 791681A FI 71177 C FI71177 C FI 71177C
Authority
FI
Finland
Prior art keywords
pulp
alkali metal
metal salt
concentration
dry weight
Prior art date
Application number
FI791681A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI791681A (fi
FI71177B (fi
Inventor
Bronislav Henri May
Original Assignee
Monsanto Europe Sa
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 Monsanto Europe Sa filed Critical Monsanto Europe Sa
Publication of FI791681A publication Critical patent/FI791681A/fi
Publication of FI71177B publication Critical patent/FI71177B/fi
Application granted granted Critical
Publication of FI71177C publication Critical patent/FI71177C/fi

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
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1042—Use of chelating agents

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Cereal-Derived Products (AREA)
FI791681A 1978-05-26 1979-05-25 Blekning av massa FI71177C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2290178 1978-05-26
GB2290178 1978-05-26

Publications (3)

Publication Number Publication Date
FI791681A FI791681A (fi) 1979-11-27
FI71177B FI71177B (fi) 1986-08-14
FI71177C true FI71177C (fi) 1986-11-24

Family

ID=10186899

Family Applications (1)

Application Number Title Priority Date Filing Date
FI791681A FI71177C (fi) 1978-05-26 1979-05-25 Blekning av massa

Country Status (7)

Country Link
AU (1) AU528265B2 (no)
CA (1) CA1120210A (no)
FI (1) FI71177C (no)
FR (1) FR2426767A1 (no)
NO (1) NO153309C (no)
SE (1) SE7904430L (no)
ZA (1) ZA792563B (no)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE434284B (sv) * 1980-05-07 1984-07-16 Mo Och Domsjoe Ab Forfarande vid syrgasdelignifiering av kemiskt uppsluten cellulosamassa varvid aromatiska diaminer tillfores
SE441192B (sv) * 1980-05-27 1985-09-16 Mo Och Domsjoe Ab Forfarande for delignifiering av kemisk cellulosamassa med syrgas i nervaro av ett eller flera neutralisationsmedel
CN102229619A (zh) * 2011-04-26 2011-11-02 河南清水源科技股份有限公司 四乙烯五胺七亚甲基膦酸及其生产工艺
CA3075029A1 (en) 2017-09-11 2019-03-14 Solenis Technologies, L.P. Method for enhanced oxygen delignification of chemical wood pulps

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE785964A (fr) * 1971-07-07 1973-01-08 Monsanto Co Derives condenses de polyalkylenepolyamines

Also Published As

Publication number Publication date
CA1120210A (en) 1982-03-23
FI791681A (fi) 1979-11-27
FR2426767A1 (fr) 1979-12-21
ZA792563B (en) 1980-10-29
NO153309C (no) 1986-02-19
AU4723379A (en) 1979-11-29
AU528265B2 (en) 1983-04-21
FI71177B (fi) 1986-08-14
NO153309B (no) 1985-11-11
FR2426767B1 (no) 1985-03-22
SE7904430L (sv) 1979-11-27
NO791728L (no) 1979-11-27

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Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: MONSANTO EUROPE S.A.