Wolff Walsrode Ag

Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Dow Global Technolgoies LLC

Fritz Loth

Klaus Szablikowski

Wolfgang Koch

Erik-Andreas Klohr

Detmar Redeker

Wolfgang Wagenknecht

Jörg Neubauer

Bert Volkert

J&ouml;rg Neubauer

Carola Fanter

Benedikt Langer

A cellulose ether that is predominantly substituted in the C3 position of the anhydroglucose unit of the cellulose is described. In an embodiment of the present invention, the partial degree of substitution in the C3 position of the cellulose ether is &#x2267;60%, based on the total degree of substitution.

Cellulose ethers

A cellulose ether that is predominantly substituted in the C3 position of the anhydroglucose unit of the cellulose is described. In an embodiment of the present invention, the partial degree of substitution in the C3 position of the cellulose ether is &gE;60%, based on the total degree of substitution. Also described is a process for preparing the cellulose ether of the present invention. The process involves, reacting cellulose, dissolved in N-methylmorpholine-N-oxide monohydrate (NMMNO) and optionally other inert organic solvents, with alkylation reagents. The reaction takes place in the presence of: (i) an insoluble solid phase catalyst, e.g., solid ion exchange resins based on polystyrene having quaternary ammonium groups; (ii) stabilizers, e.g., propyl gallate; and (iii) optionally additional soluble co-catalysts, e.g., trimethylbenzylammonium hydroxide.

Cellulose ethers and method for producing the same

Bead-shaped cellulose products and a process for the manufacturing of such ead-shaped porous cellulose products provide improved characteristics, particularly a hydrophilic, reversibly expandable cellulose matrix with a pore structure that can be adjusted within wide ranges in a targeted manner while non-specific mutual reactions are simultaneously suppressed by biomacromolecules.

Bead-shaped cellulose products for separating and carrier materials and

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Teltow, Germany

Fritz Loth