Method for activating and precipitating lignin

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

    Research output: PatentPatent


    According to an example 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. for simultaneous activation (for example by demethylation and/or demethoxylation) and precipitation of the lignin.

    Patent family as of 9.12.2021
    AU2016282411 AA 20171207 AU20160282411 20160623      
    AU2016282411 BB 20190509 AU20160282411 20160623      
    BR112017028110 A2 20180828 BR20171128110 20160623      
    CA2986196 AA 20171116 CA20162986196 20160623      
    CA2986196 C 20200630 CA20162986196 20160623      
    CN107735431 A 20180223 CN201680034126 20160623      
    EP3313915 A1 20180502 EP20160813793 20160623      
    EP3313915 A4 20190130 EP20160813793 20160623      
    FI20155505 A 20161227 FI20150005505 20150626      
    US10894866 BB 20210119 US20170736308 20160623      
    US2018179339 AA 20180628 US20170736308 20160623      
    WO16207493 A1 20161229 WO2016FI50461 20160623

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    Original languageEnglish
    Patent numberUS2018179339
    IPCC08G 8/ 24 A I
    Priority date23/06/16
    Publication statusPublished - 28 Jun 2018
    MoE publication typeH1 Granted patent


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