05-03-2020 дата публикации
Номер: US20200071468A1
Автор:
Anton FRIEDL,
Felix WEINWURM,
Stefan BEISL,
FRIEDL ANTON,
WEINWURM FELIX,
BEISL STEFAN,
FRIEDL, Anton,
WEINWURM, Felix,
BEISL, Stefan
Принадлежит:
The invention relates to a method for producing lignin particles, comprising the steps of: a) extracting lignin from a lignincontaining starter material, using a mixture that comprises at least one organic solvent and water, and b) precipitating the lignin in the solution from step a). 1. A process for the production of lignin particles , comprising the steps of:a) extracting lignin from a lignin-containing starting material by using a mixture comprising at least one organic solvent and water, andb) precipitating the lignin in solution from step a).2. The process as claimed in claim 1 , wherein insoluble components present in the solution from step a) are removed prior to step b).3. The process as claimed in claim 1 , wherein the solution for precipitation in step b) comprises a maximum of 1% of insoluble components.4. The process as claimed in claim 1 , wherein in step b) claim 1 , the lignin in solution is precipitated by decreasing the pH and/or by reducing the concentration of the organic solvent in the organic solvent/water mixture.5. The process as claimed in claim 4 , wherein organic solvent is removed from the lignin-containing organic solvent/water mixture at a rate of 0.1 to 2% by weight/min.6. The process as claimed in claim 4 , wherein the organic solvent/water mixture is exposed to a pressure of 50 to 500 mbar claim 4 , in order to precipitate lignin particles.7. The process as claimed in claim 4 , wherein the organic solvent/water mixture is exposed to a temperature of 20° C. to 60° C.8. The process as claimed in claim 1 , wherein prior to precipitating it out claim 1 , the lignin in solution is adjusted to 0.1 to 50 g of lignin/L of organic solvent/water mixture.9. The process as claimed in claim 4 , wherein the pH of the organic solvent/water mixture upon precipitation of the lignin by reducing the concentration of the organic solvent in the organic solvent/water mixture is decreased by adding a water-acid mixture with a pH of 1 to 6.10. The process ...
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