公开(公告)号：WO2022180309A1

公开(公告)日：2022-09-01

申请号：PCT/FI2022/050126

申请日：2022-02-28

Applicant: INFINITED FIBER COMPANY OY

Inventor： MALANIN, Erkki ,  MÄKELÄ, Jani ,  SIREN, Sakari ,  STJERNBERG, Martin ,  HARLIN, Ali

IPC: C08B15/06

Abstract: According to an example aspect of the present invention, there is provided a method of producing cellulose carbamate in an aqueous phase. The method comprises the steps of a) providing a cellulose raw-material; b) providing urea; c) mixing cellulose and urea to provide a mixture; d) subjecting the mixture to a reduced pressure of no more than 350 mbar(a); e) heating the mixture to a temperature of 130 to 150 ºC to subject cellulose to reaction with urea to form cellulose carbamate; f) releasing the pressure; and g) recovering the cellulose carbamate g) recovering the cellulose carbamate, and h) washing the cellulose carbamate with water to remove water soluble nitrogenous compounds wherein the water- soluble nitrogeneous compounds make up at the most 12 %, preferably 6 % or less, of the total weight of cellulose carbamate and water-soluble nitrogenous compounds.

公开(公告)号：WO2023037048A1

公开(公告)日：2023-03-16

申请号：PCT/FI2022/050588

申请日：2022-09-06

Applicant: INFINITED FIBER COMPANY OY

Inventor： SIREN, Sakari ,  STJERNBERG, Martin

IPC: D04H1/425 ,  D04H1/4258 ,  D04H1/4274 ,  D21C3/02 ,  D21C3/04 ,  D21C3/26 ,  D21C9/00 ,  D21C9/02 ,  D21H11/12 ,  D21H13/24

Abstract: According to an example aspect of the present invention, there is provided a method of treating a fibrous raw-material containing cellulosic fibres and polyester fibres, comprising the steps of subjecting the raw-material to acid treatment and to a washing operation, subjecting the washed first modified fibrous raw-material to an alkaline treatment to dissolve at least a portion of the polyester fibres and to form a second modified fibrous raw-material that is subjected to separation to separate solid matter from an aqueous liquid phase comprising dissolved material, recovering the solid matter of the separation, subjecting the recovered second modified raw-material to a washing, subjecting the liquid phase to a first filtration step using a micromembrane to obtain a first aqueous permeate, subjecting the first permeate to a second filtration step using a nanomembrane to obtain a second permeate, recovering the second aqueous permeate and recycling it to an alkaline treatment step.

公开(公告)号：WO2021038136A1

公开(公告)日：2021-03-04

申请号：PCT/FI2020/050560

申请日：2020-08-31

Applicant: INFINITED FIBER COMPANY OY

Inventor： HARLIN, Ali ,  MALANIN, Erkki ,  MÄKELÄ, Jani

IPC: C08B1/00 ,  C08B15/06

Abstract: According to an example aspect of the present invention, there is provided a method for pretreating cellulose, e.g. cotton, comprising the steps of providing a mixture having a solid content, said mixture comprising cellulose, and a liquid, and mechanically working the mixture to open the fibril structure of cell walls of cellulose. The mechanical working comprises shear mixing in a continuous mechanical mixing device.

公开(公告)号：WO2022144506A1

公开(公告)日：2022-07-07

申请号：PCT/FI2021/050918

申请日：2021-12-31

Applicant: INFINITED FIBER COMPANY OY

Inventor： SIREN, Sakari ,  HARLIN, Ali ,  STJERNBERG, Martin

IPC: C08J3/05 ,  C08B3/14 ,  C08B3/22

Abstract: According to an example aspect of the present invention, there is provided a method of continuously dissolving cellulose carbamate in an alkaline aqueous phase to form a solution, comprising the steps of providing cellulose carbamate, mixing the cellulose carbamate with an aqueous alkaline solution to form a mixture, conducting the mixture through the mixing zone of a continuously operated mixing kneader at a temperature of 10 degrees Celsius or less to produce a solution of said cellulose carbamate in an alkaline aqueous phase, and recovering the cellulose carbamate containing aqueous phase.

公开(公告)号：WO2021181007A1

公开(公告)日：2021-09-16

申请号：PCT/FI2021/050171

申请日：2021-03-09

Applicant: INFINITED FIBER COMPANY OY

Inventor： HARLIN, Ali ,  SIREN, Sakari ,  MÄKELÄ, Jani

IPC: D21C5/00 ,  D21B1/04

Abstract: According to an example aspect of the present invention, there is provided a method of separating cellulosic fibres and non-cellulosic fibres from a mixed fibre textile material comprising cellulosic and non-cellulosic fibres. The method comprises mechanically disintegrating the textile material to open textile structures in the material, contacting the mechanically opened structures with an acid in a first chemical step, and contacting the mechanically opened structures with an alkaline in a second chemical step.

公开(公告)号：WO2018197756A1

公开(公告)日：2018-11-01

申请号：PCT/FI2018/050310

申请日：2018-04-27

Applicant: INFINITED FIBER COMPANY OY

Inventor： HARLIN, Ali ,  MÄÄTTÄNEN, Marjo ,  SIVONEN, Eino ,  VEHVILÄINEN, Marianna ,  ASIKAINEN, Sari ,  VALTA, Kyösti ,  SÄRKILAHTI, Airi

IPC: C08B1/00 ,  C08B1/08 ,  C08B16/00 ,  D21C5/00 ,  D01C1/00 ,  C08J11/00 ,  C08J11/10 ,  C08B15/00 ,  C08B15/06

Abstract: The present invention relates to a process for treating textile-based materials, typically textile-based waste-materials, to prepare them for further use. The treatment includes two or more chemical and/or enzymatic treatment steps, including at least one alkaline treatment step, all intended to cause at least a partial dissolution of the textile-based material. Particularly, the process is used for the treatment of cotton-based waste materials.