A method for dissolving cellulose and a cellulosic product obtained from a solution comprising dissolved cellulose

Marianna Vehviläinen; Pertti Nousiainen; Taina Kamppuri; Maija Järventausta

A method for dissolving cellulose and a cellulosic product obtained from a solution comprising dissolved cellulose

Marianna Vehviläinen (Inventor)
, Pertti Nousiainen (Inventor)
, Taina Kamppuri (Inventor)
, Maija Järventausta (Inventor)

Tampere University of Technology (TUT)

Research output: Patent › Patent

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.

Patent family as of 7.9.2021
CA2723573 AA 20101104 CA20092723573 20090506
CA2723573 C 20161115 CA20092723573 20090506
CN102037019 A 20110427 CN200980116326 20090506
CN102037019B 20140402 CN200980116326 20090506
DE602008047850D1 20170126 DE200860047850T 20080506
EP2116557 A1 20091111 EP20080397510 20080506
EP2116557 B1 20161214 EP20080397510 20080506
IN301706 B 20181005 IN2010DN07547 20101026
RU2010150201 A 20120827 RU20100150201 20090506
RU2500687 C2 20131210 RU20100150201 20090506
US2011112286 AA 20110512 US20090991299 20090506
US8492125 BB 20130723 US20090991299 20090506
WO09135875 A1 20091112 WO2009EP55479 20090506

Link to current patent family on right

Original language	English
Patent number	EP2116557 A1
IPC	D01F 2/02
Priority date	6/05/08
Filing date	6/05/08
Publication status	Published - 11 Nov 2009
MoE publication type	H1 Granted patent

Cite this

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title = "A method for dissolving cellulose and a cellulosic product obtained from a solution comprising dissolved cellulose",

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. Patent family as of 7.9.2021 CA2723573 AA 20101104 CA20092723573 20090506 CA2723573 C 20161115 CA20092723573 20090506 CN102037019 A 20110427 CN200980116326 20090506 CN102037019B 20140402 CN200980116326 20090506 DE602008047850D1 20170126 DE200860047850T 20080506 EP2116557 A1 20091111 EP20080397510 20080506 EP2116557 B1 20161214 EP20080397510 20080506 IN301706 B 20181005 IN2010DN07547 20101026 RU2010150201 A 20120827 RU20100150201 20090506 RU2500687 C2 20131210 RU20100150201 20090506 US2011112286 AA 20110512 US20090991299 20090506 US8492125 BB 20130723 US20090991299 20090506 WO09135875 A1 20091112 WO2009EP55479 20090506 Link to current patent family on right ",

author = "Marianna Vehvil{\"a}inen and Pertti Nousiainen and Taina Kamppuri and Maija J{\"a}rventausta",

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T1 - A method for dissolving cellulose and a cellulosic product obtained from a solution comprising dissolved cellulose

AU - Vehviläinen, Marianna

AU - Nousiainen, Pertti

AU - Kamppuri, Taina

AU - Järventausta, Maija

PY - 2009/11/11

Y1 - 2009/11/11

N2 - 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. Patent family as of 7.9.2021 CA2723573 AA 20101104 CA20092723573 20090506 CA2723573 C 20161115 CA20092723573 20090506 CN102037019 A 20110427 CN200980116326 20090506 CN102037019B 20140402 CN200980116326 20090506 DE602008047850D1 20170126 DE200860047850T 20080506 EP2116557 A1 20091111 EP20080397510 20080506 EP2116557 B1 20161214 EP20080397510 20080506 IN301706 B 20181005 IN2010DN07547 20101026 RU2010150201 A 20120827 RU20100150201 20090506 RU2500687 C2 20131210 RU20100150201 20090506 US2011112286 AA 20110512 US20090991299 20090506 US8492125 BB 20130723 US20090991299 20090506 WO09135875 A1 20091112 WO2009EP55479 20090506 Link to current patent family on right

AB - 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. Patent family as of 7.9.2021 CA2723573 AA 20101104 CA20092723573 20090506 CA2723573 C 20161115 CA20092723573 20090506 CN102037019 A 20110427 CN200980116326 20090506 CN102037019B 20140402 CN200980116326 20090506 DE602008047850D1 20170126 DE200860047850T 20080506 EP2116557 A1 20091111 EP20080397510 20080506 EP2116557 B1 20161214 EP20080397510 20080506 IN301706 B 20181005 IN2010DN07547 20101026 RU2010150201 A 20120827 RU20100150201 20090506 RU2500687 C2 20131210 RU20100150201 20090506 US2011112286 AA 20110512 US20090991299 20090506 US8492125 BB 20130723 US20090991299 20090506 WO09135875 A1 20091112 WO2009EP55479 20090506 Link to current patent family on right

UR - https://worldwide.espacenet.com/patent/search/family/039760980/publication/EP2116557A1?q=EP2116557

M3 - Patent

M1 - EP2116557 A1

Y2 - 2008/05/06

PB - European Patent Office (EPO)

ER -

A method for dissolving cellulose and a cellulosic product obtained from a solution comprising dissolved cellulose

Abstract

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Method for dissolving cellulose and a cellulosic product obtained from a solution comprising dissolved cellulose

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