Abstract: The present invention relates to a method for dissolving cellulose. The method comprises—introducing cellulosic raw material,—treating the cellulosic raw material in an enzymatic treatment process,—mixing the cellulosic raw material after the enzymatic treatment in an aqueous solution in order to obtain an aqueous intermediate product containing the cellulosic raw material of at least 3.5 wt.-%, alkali metal hydroxide between 3.5 wt.-% and 7 wt.-% and zinc salt,—freezing the intermediate product to a solid state, and—melting the frozen intermediate product. The present invention also relates to a cellulosic product obtained from a solution comprising dissolved cellulose.
Type:
Grant
Filed:
May 6, 2009
Date of Patent:
July 23, 2013
Assignee:
TTY Saatio
Inventors:
Marianna Vehvilainen, Pertti Nousiainen, Taina Kamppuri, Maija Jarventausta
Abstract: The present invention relates to a method for dissolving cellulose. The method comprises—introducing cellulosic raw material,—treating the cellulosic raw material in an enzymatic treatment process,—mixing the cellulosic raw material after the enzymatic treatment in an aqueous solution in order to obtain an aqueous intermediate product containing the cellulosic raw material of at least 3.5 wt.-%, alkali metal hydroxide between 3.5 wt.-% and 7 wt.-% and zinc salt,—freezing the intermediate product to a solid state, and -melting the frozen intermediate product. The present invention also relates to a cellulosic product obtained from a solution comprising dissolved cellulose.
Type:
Application
Filed:
May 6, 2009
Publication date:
May 12, 2011
Applicant:
TTY SAATIO
Inventors:
Marianna Vehvilainen, Pertti Nousiainen, Taina Kamppuri, Maija Jarventausta