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Title:
The preparing method of the cellulose ether by a high solid content method, output obtained, and use of the output
Document Type and Number:
Japanese Patent JP6247283
Kind Code:
B2
Abstract:
The present invention provides a method for production of cellulose ethers in a high solids process substantially without use of organic solvents as reaction and/or washing medium. In the method of the invention the first alkalization step is carried out by using high solids content cellulose pulp and solid sodium hydroxide. This is followed by an etherification step where the solids content is preferably further increased and the use of solid etherification reactant is preferred. As no organic solvents are used as reaction media the invented method enables production of cellulose ethers directly from never dried pulp with significant savings in energy and investment costs. The method is especially suitable for the production of carboxymethyl cellulose sodium salt (CMC) with low degree of substitution (DS<0.3). The use of the resulting none or low water soluble carboxymethylated cellulosic fibres is suitable for example for producing microfibrillated cellulose.

Inventors:
Saxel, Haydy
Heiskanen, Isto
Axleup, Lars
Land Hensdal, Cecilia
Striped, Veicco
Application Number:
JP2015503978A
Publication Date:
December 13, 2017
Filing Date:
April 04, 2013
Export Citation:
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Assignee:
Stra Enso Oijay
International Classes:
C08B11/12; A23L29/262; A61K8/73; C09K8/10; C11D3/37; D21H11/16; D21H15/02
Domestic Patent References:
JP2010106197A
JP2008222859A
Foreign References:
US2619483
US20040158057
US2982765
US1858017
GB976335A
Attorney, Agent or Firm:
Asamura patent office