PROCÉDÉ DE PRODUCTION DE LIGNINE À SUBSTANCES ODORANTES EN QUANTITÉ RÉDUITE

摘要

The present invention relates to a method of producing lignin with reduced amount of odorous substances comprising the step of: • providing asolid phaselignin containing starting material to be contacted with a water solution comprising carboxylic acid; • dissolving the guaiacol andetylguaiacol content from the lignin into the water solution, and • draining off the water solution with its content ofguaiacol or etylguaiacol; • obtaining a lignin material with a reduced content of guaiacol or etylguaiacol The inventionalso relates to a lignin product with reduced odourobtained and/or obtainable by themethod obtained lignin as a component in polymer blends, anadditiveor filler in building materials, as binding agent in adhesives, and/or for the productionof a carbon fibre, especially in indoor applications.