Use of oxidized lignin as a dispersant

Anna Kalliola (Inventor), Tiina Liitiä (Inventor), Tarja Tamminen (Inventor), Tapio Vehmas (Inventor)

Research output: PatentPatent


The present invention concerns a process for oxidizing lignin at alkaline conditions. This oxidized lignin can be used as a dispersant in various end-products, for example as a renewable plasticizer in cement-containing products, such as concrete, where the ability of the oxidized lignin to endure alkaline conditions is an advantage. Further, the invention concerns a concrete mixture containing aggregate, cement, water and a plasticizer formed of oxidized lignin, and a process for producing such a concrete mixture. The oxidized lignin can be manufactured using a process, where the lignin starting material is reacted with an oxidizing agent in solution in alkaline conditions.

Patent family as of 12.11.2021
BR112016007318 A2 20170801 BR20161107318 20141002      
CN105705475 A 20160622 CN201480054352 20141002      
CN105705475 B 20181228 CN201480054352 20141002      
EP3052451 A1 20160810 EP20140851342 20141002      
EP3052451 A4 20170614 EP20140851342 20141002      
FI126397 B 20161115 FI20130005986 20131002      
FI20135986 A 20150403 FI20130005986 20131002      
US2016244364 AA 20160825 US20140026618 20141002      
US9676667 BB 20170613 US20140026618 20141002      
WO15049424 A1 20150409 WO2014FI50754 20141002

Link to current patent family on right 

Original languageEnglish
Patent numberUS2016244364
IPCC04B 24/ 24 A I
Priority date2/10/14
Publication statusPublished - 25 Aug 2016
MoE publication typeH1 Granted patent


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