Upm-kymmene Corporation

Meri Ventola

Juha Tamper

Sami Turunen

Mauno Miettinen

Vilho Nissinen

Jere Salminen

Klaus Muller-Gommert

Folke Orsa

Heiko Hilbert

Johann Oberndorfer

Michael Heberle

Hendrik Krois

Klaus MÜLLER-Gommert

Folke ÖRsa

In a method and an apparatus for recovering chemicals from an alkaline lignin material, the alkaline lignin material () which comprises NaOH or KOH is precipitated in presence of an acid in a precipitation stage () for forming a precipitated lignin (), the precipitated lignin () is supplied to a separation stage () in which a purified lignin () is recovered and from which at least one fraction () which comprises Na or K is supplied to a crystallization stage (), and the fraction () which comprises Na or K is treated by crystallization in the crystallization stage () for forming a crystallized compound (). Further, the invention relates to use of the purified lignin, and lignin and chemical products.

Method and an apparatus for recovering chemicals from an alkaline lignin material

A method and apparatus for enzymatic hydrolysis where a plant based feed is hydrolysed using an enzyme to form a hydrolysed product. An additive for preventing enzyme adsorption is fed to an enzymatic hydrolysis stage, the plant based feed, the hydrolysed product, a starting material, and/or a plant based material formed from the starting material. The hydrolysed product is supplied from the enzymatic hydrolysis stage to a first solid-liquid separation stage where a lignin fraction comprising the additive and a liquid composition comprising the enzyme are separated. The liquid composition is mixed with the plant based material in a mixing stage, forming a mixture. A solid and liquid fraction are separated from the mixture in a second solid-liquid separation stage. At least part of the solid fraction comprising the enzyme is fed as the plant based feed to the enzymatic hydrolysis stage.

Method and an apparatus for an enzymatic hydrolysis, a liquid fraction and a lignin fraction

In a method and an apparatus furfural is recovered from a steam stream () which is formed in a treatment of a pretreated wood based material (). The pretreated wood based material () which comprises at least carbohydrates is treated in a steam treatment stage () in which the steam is released. The steam stream () which comprises furfural is supplied out from the steam treatment stage (). A pretreated and steam-treated wood based material () which comprises carbohydrates is supplied out from the steam treatment stage (), and the steam stream () is treated in a recovery stage () for recovering a furfural based fraction ().

Method and an apparatus for recovering furfural

A method for producing basic products from ash, which includes the provision of a starting material in particle form, crushing the particles of the starting material by high-frequency pressure impulses and the in situ separation of at least two fractions with different average particle sizes, where the energy-efficient production of a basic product with a defined particle size and high reactivity is effected, such that the produced basic products can be used directly for further product production, e.g. as alkalizing agent, for ground stabilization or as filler.

Method for producing basic products from ash, in particular paper ash

Growing community of inventors

Lappeenranta, Finland

Meri Ventola