Upm-kymmene Corporation

Sanna Valkonen

Okko Ringena

Suvi Pietarinen

Kati Eskelinen

Kati Oinonen

Roland Klein

Michael Duetsch

Matthias Rehahn

Sabrina Mehlhase

Matthias Baaske

Markus Biesalski

Andreas Büter

Johanna Fleckenstein

Narmin Nubbo

Frank Miletzky

Angelika Endres

Jennifer Dietz

Juha-Pekka Koitto

Samuel Schabel

Jenni Leppänen

Henri Kröling

The invention relates to a method for treating lignin, wherein the method comprises the following steps: a) dissolving lignin into an aqueous composition, which contains a compound selected from the class of phenols, while keeping the temperature of the composition at 0-6° C.; and b) allowing the composition to react while keeping the temperature of the composition at 60-100° C. and the pH of the composition at a pH value of 6-14. The invention relates further to a method for producing a binder composition and to different applications thereof.

Binder composition, and products including binder composition

The invention relates to a method for treating lignin, wherein the method comprises the following steps: a) dissolving lignin into an aqueous composition, which contains a compound selected from the class of phenols, while keeping the temperature of the composition at 0-16° C.; and b) allowing the composition to react while keeping the temperature of the composition at 60-100° C. and the pH of the composition at a pH valise of 6-14. The invention relates further to a method for producing a binder composition and to different applications thereof.

Method for treating lignin and for producing a binder composition

The present invention relates to a method for increasing the reactivity of lignin, wherein the method comprises the following steps: a) forming, under heating at a temperature of 30-70&#xb0; C., an aqueous dispersion comprising alkali and lignin, wherein the alkali comprises a hydroxide of an alkali metal; and b) heating the dispersion formed in step a) at a temperature of 50-95&#xb0; C. for producing alkalated lignin.

Method for increasing the reactivity of lignin

The present invention relates to a method for increasing the reactivity of lignin, wherein the method comprises the following steps: a) forming, under heating at a temperature of 71-94&#xb0; C., an aqueous dispersion comprising alkali and lignin, wherein the alkali comprises a hydroxide of an alkali metal; and b) heating the dispersion formed in step a) at a temperature of 50-95&#xb0; C. for producing alkalated lignin.

The invention relates to a method for producing a fiber based product, wherein the method comprises the steps of: a) applying a binder composition over at least one surface of at least one fiber based substrate; b) determining the distribution of the applied binder composition over the entire at least one surface of the at least one fiber based substrate; and c) based on the determination in step b) either accepting the treated at least one fiber based substrate for the production of the fiber based product or rejecting the treated at least one fiber based substrate from the production of the fiber based product. The invention further relates to a method for producing a binder composition, to a binder composition and to a fiber based product.

Fiber based product

The invention relates to a method for treating lignin, wherein the method comprises the following steps: a) dissolving lignin into an aqueous composition, which contains a compound selected from the class of phenols, while keeping the temperature of the composition at 0-60&#xb0; C.; and b) allowing the composition to react while keeping the temperature of the composition at 60-100&#xb0; C. and the pH of the composition at a pH value of 6-14. The invention relates further to a method for producing a binder composition and to dissolve lignin into an aqueous composition different applications thereof.

The present invention relates to a method for treating lignin, wherein the method comprises the following steps: a) dissolving lignin into an aqueous composition, which contains a compound selected from the class of phenols and alkali, while keeping the temperature of the composition at 40-85&#xb0; C., wherein the alkali comprises a hydroxide of an alkali metal; and b) heating the composition at a temperature, which is higher than the temperature of the composition in step a), with the proviso that the temperature of the composition does not exceed 100&#xb0; C., while keeping the pH of the composition at a pH value of 6-14.

The invention relates to a method for producing a fiber based product, wherein the method comprises the steps of: a) applying a binder composition over a at least one surface of at least one fiber based substrate; b) determining the distribution of the applied binder composition over the en-tire at least one surface of the at least one fiber based substrate; and c) based on the determination in step b) either accepting the treated at least one fiber based substrate for the production of the fiber based product or rejecting the treated at least one fiber based substrate from the production of the fiber based product. The invention further relates to a method for producing a binder composition, to a binder composition and to a fiber based product.

The present invention relates to a method for producing a binder composition, wherein the method comprises the following steps: (i) forming an aqueous composition comprising reactant components including lignin molecules of 11-60 lignin units, lignin molecules of 1-10 lignin units, polymerizable substance and crosslinking agent in the presence of a catalyst; and (ii) cooking the composition at a temperature of 60-95&#xb0; C. for polymerizing the reactant components until a binder composition with a predetermined viscosity value is formed.

Use of low molecular weight lignin together with lignin for the production of a phenol-formaldehyde binder composition

The invention relates to a method for recovering low molecular weight lignin from a filtrate, wherein the low molecular weight lignin includes lignin molecules having a molecular weight of 3000 g/mol or lower, wherein the filtrate is obtained from a process where lignin is precipitated from black liquor and the formed precipitate is separated therefrom by filtration resulting in the filtrate including low molecular weight lignin being formed, and wherein the method includes the following steps: a) adjusting the pH of the filtrate to a value of 3-4 for precipitating lignin in the filtrate; b) separating the precipitated lignin from the filtrate; c) reslurrying the separated lignin until the dry solids content of the slurry is 25-40 weight-% and adjusting the pH of the slurry to a value of 2-3; d) washing the slurry; and e) separating the lignin from the slurry.

Method for recovering low molecular weight lignin from a filtrate

The present invention relates to a method for fractionating lignin, wherein the method comprises the following steps: (i) dissolving lignin into a mixture containing organic solvent and water; and (ii) ultrafiltrating the mixture formed in step (i) through one or more filtration membranes for producing a predetermined number of lignin fractions, wherein each fraction contains lignin with a molecular weight within a predetermined range. The present invention further relates to a lignin fraction and to the uses thereof.

Method for fractionating lignin

The present invention related to a fiber mat reinforced resin composite comprising a reinforcing constituent of fibers in the form of at least one mat embedded within a resin matrix. The invention further relates to a method for the production of a fiber mat reinforced resin composite.

Fiber mat reinforced resin composite

The present invention relates to a fiber reinforced composite comprising a reinforcing constituent of fibers embedded in a resin matrix, wherein the resin matrix comprises epoxy resin crosslinked with aminated lignin. The invention further relates to a method for the production of a fiber reinforced composite.

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Lappeenranta, Finland

Sanna Valkonen