FI72155B - Foerfarande foer kausticering av groenlut i en alkalisk massakokningsprocess - Google Patents

Foerfarande foer kausticering av groenlut i en alkalisk massakokningsprocess Download PDF

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Publication number
FI72155B
FI72155B FI833905A FI833905A FI72155B FI 72155 B FI72155 B FI 72155B FI 833905 A FI833905 A FI 833905A FI 833905 A FI833905 A FI 833905A FI 72155 B FI72155 B FI 72155B
Authority
FI
Finland
Prior art keywords
lime
caustic
liquor
white liquor
causticization
Prior art date
Application number
FI833905A
Other languages
English (en)
Swedish (sv)
Other versions
FI833905A0 (fi
FI833905A (fi
FI72155C (fi
Inventor
Markku Leiritie
Christer Sundstroem
Kjell Dahlberg
Goeran Jansson
Original Assignee
Partek Ab
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 Partek Ab filed Critical Partek Ab
Priority to FI833905A priority Critical patent/FI72155C/fi
Publication of FI833905A0 publication Critical patent/FI833905A0/fi
Priority to PCT/FI1984/000078 priority patent/WO1985001966A1/en
Priority to DE8484903891T priority patent/DE3475804D1/de
Priority to EP84903891A priority patent/EP0162059B1/en
Priority to CA000466177A priority patent/CA1244605A/en
Publication of FI833905A publication Critical patent/FI833905A/fi
Priority to NO852958A priority patent/NO164611C/no
Publication of FI72155B publication Critical patent/FI72155B/fi
Application granted granted Critical
Publication of FI72155C publication Critical patent/FI72155C/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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0064—Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green liquor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills

Landscapes

  • Paper (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Claims (5)

1. Menetelmä viherlipeän kaustisoimiseksi kahdessa vaiheessa alkalisessa massakeittoprosessissa käsittelemällä esikaustisoimisvaiheessa viherlipeätä alimäärällä kalkkia viherlipeän soodamäärään nähden ja käsittelemällä jälki-kaustisoimisvaiheessa esikaustisoimisvaiheessa muodostunutta osittain kaustisoitua valkolipeätä kalkilla valkolipeäsus-pension muodostamiseksi, minkä jälkeen valkolipeä erotetaan suspensiosta, tunnettu siitä, että esikaustisoimis-vaihe suoritetaan käyttämällä sellainen määrä meesakalkkia, että osittain kaustisoidun valkolipeän kaustisoimisasteeksi saadaan n. 70-80 % ja että jälkikaustisoimisvaihe, jota mahdollisesti edeltää esikaustisoimisvaiheessa muodostuneen meesan erotus, suoritetaan käyttämällä sellainen määrä tuoretta kalkkia, joka on saatu kalsinoimalla kalkkikiveä, että lopullisen valkolipeän kaustisoimisasteeksi saadaan n. 83-90 %.
2. Patenttivaatimuksen 1 mukainen menetelmä, tunnettu siitä, että esikaustisoimisvaiheessa muodostunut meesa erotetaan mainitusta osittain kaustisoidusta valkolipeästä ja että ainakin osa tästä meesasta poltetaan meesakalkiksi ja palautetaan esikaustisoimisvaiheeseen.
3. Patenttivaatimuksen 1 tai 2 mukainen menetelmä, tunnettu siitä, että jälkikaustisoimisvaiheessa muodostunut meesa sekä mahdollinen reagoimaton kalkki palautetaan kokonaan tai osittain esikaustisoimisvaiheeseen ilman pesua tai pesun jälkeen.
4. Patenttivaatimuksen 1 mukainen menetelmä, tunnettu siitä, että sekä esi- että jälkikaustisoimisvaiheessa muodostunut meesa erotetaan yhteisesti jälkikaustisoimisvaiheen jälkeen ja että ainakin osa tästä meesasta poltetaan meesakalkiksi ja palautetaan esikaustisoimisvaiheeseen. i<
FI833905A 1983-10-25 1983-10-25 Foerfarande foer kausticering av groenlut i en alkalisk massakokningsprocess. FI72155C (fi)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FI833905A FI72155C (fi) 1983-10-25 1983-10-25 Foerfarande foer kausticering av groenlut i en alkalisk massakokningsprocess.
PCT/FI1984/000078 WO1985001966A1 (en) 1983-10-25 1984-10-23 Method for causticizing green liquor in an alkaline pulping process
DE8484903891T DE3475804D1 (en) 1983-10-25 1984-10-23 Method for causticizing green liquor in an alkaline pulping process
EP84903891A EP0162059B1 (en) 1983-10-25 1984-10-23 Method for causticizing green liquor in an alkaline pulping process
CA000466177A CA1244605A (en) 1983-10-25 1984-10-24 Method for causticizing green liquor in an alkaline pulping process
NO852958A NO164611C (no) 1983-10-25 1985-07-24 Fremgansmaate ved kaustisering av groenn-lut.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI833905A FI72155C (fi) 1983-10-25 1983-10-25 Foerfarande foer kausticering av groenlut i en alkalisk massakokningsprocess.
FI833905 1983-10-25

Publications (4)

Publication Number Publication Date
FI833905A0 FI833905A0 (fi) 1983-10-25
FI833905A FI833905A (fi) 1985-04-26
FI72155B true FI72155B (fi) 1986-12-31
FI72155C FI72155C (fi) 1987-04-13

Family

ID=8517977

Family Applications (1)

Application Number Title Priority Date Filing Date
FI833905A FI72155C (fi) 1983-10-25 1983-10-25 Foerfarande foer kausticering av groenlut i en alkalisk massakokningsprocess.

Country Status (5)

Country Link
EP (1) EP0162059B1 (fi)
CA (1) CA1244605A (fi)
DE (1) DE3475804D1 (fi)
FI (1) FI72155C (fi)
WO (1) WO1985001966A1 (fi)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE456254B (sv) * 1987-02-12 1988-09-19 Korsnes Ab Sett att rena gronlut i sulfatmassafabrikers kemikalieatervinning
US4770742A (en) * 1987-08-07 1988-09-13 Domtar Inc. Method for increasing the efficiency of a causticizing process
WO1997003245A1 (en) * 1995-07-11 1997-01-30 Ahlstrom Machinery Oy Method of separating impurities from lime and lime sludge and a method of causticizing green liquor containing impurities, such as silicon, in two stages
AT514010B1 (de) 2013-02-26 2015-02-15 Mondi Ag Verfahren zur Kaustifizierung von Grünlauge

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1815646A (en) * 1926-08-09 1931-07-21 Bates Process of causticizing
US2552183A (en) * 1945-04-07 1951-05-08 Dorr Co Two-stage causticizing
SE432000B (sv) * 1978-07-18 1984-03-12 Mo Och Domsjoe Ab Forfarande for reglering av kausticeringsgraden vid framstellning av vitlut jemte anordning for utforande av forfarandet
SE7809167L (sv) * 1978-08-30 1980-03-01 Rosenblads Patenter Ab Barlastreduktion

Also Published As

Publication number Publication date
FI833905A0 (fi) 1983-10-25
DE3475804D1 (en) 1989-02-02
CA1244605A (en) 1988-11-15
WO1985001966A1 (en) 1985-05-09
EP0162059B1 (en) 1988-12-28
FI833905A (fi) 1985-04-26
EP0162059A1 (en) 1985-11-27
FI72155C (fi) 1987-04-13

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Legal Events

Date Code Title Description
PC Transfer of assignment of patent

Owner name: A.AHLSTROM CORPORATION

MA Patent expired

Owner name: AHLSTROM MACHINERY OY