Method for producing reactive lignin

Hanne Wikberg (Inventor), Taina Ohra-Aho (Inventor), Juha Leppävuori (Inventor), Tiina Liitiä (Inventor), Heimo Kanerva (Inventor)

    Research output: PatentPatent


    According to an aspect of the present invention, there is provided a method of producing reactive lignin from an alkaline lignin containing stream, such as black liquor, e.g. kraft lignin, by using thermal treatment with temperatures between 200 and 250 °C, and a retention time of 1h or less, for activation and precipitation of the lignin.

    Patent family as of 20.12.2021
    BR112019012493 A2 20200414 BR20191112493 20171221      
    CA3046288 AA 20190606 CA20173046288 20171221      
    EP3559014 A1 20191030 EP20170883518 20171221      
    EP3559014 A4 20200715 EP20170883518 20171221      
    FI128836 B 20210115 FI20160006008 20161221      
    FI20166008 L 20180622 FI20160006008 20161221      
    US2020011012 AA 20200109 US20170470260 20171221      
    WO18115592 A1 20180628 WO2017FI50927 20171221

    Link to currentpatent family on right 

    Original languageEnglish
    Patent numberFI128836B
    IPCD21C 11/ 00 A I
    Priority date21/12/16
    Publication statusPublished - 15 Jan 2021
    MoE publication typeH1 Granted patent


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