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

    公开(公告)号:US11230691B2

    公开(公告)日:2022-01-25

    申请号:US16340481

    申请日:2017-10-12

    Abstract: 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.

    A METHOD AND AN APPARATUS FOR RECOVERING CHEMICALS FROM AN ALKALINE LIGNIN MATERIAL

    公开(公告)号:US20190309002A1

    公开(公告)日:2019-10-10

    申请号:US16461202

    申请日:2017-11-14

    Abstract: In a method and an apparatus for recovering chemicals from an alkaline lignin material, the alkaline lignin material (3) which comprises NaOH or KOH is precipitated in presence of an acid in a precipitation stage (6) for forming a precipitated lignin (7), the precipitated lignin (7) is supplied to a separation stage (8) in which a purified lignin (9) is recovered and from which at least one fraction (10) which comprises Na or K is supplied to a crystallization stage (11), and the fraction (10) which comprises Na or K is treated by crystallization in the crystallization stage (11) for forming a crystallized compound (12). Further, the invention relates to use of the purified lignin, and lignin and chemical products.

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