A Method For Producing Cationic Saccharides
AssigneeKemira Oyj
InventorErkki Johannes METSÄLÄ
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Abstract
The present invention relates to a method for producing cationic saccharides by reacting saccharide with a compound having a conjugated electron withdrawing group via oxa-Michael addition reaction for producing a derivatized saccharide followed by cationizing the derivatized saccharide. The present invention further relates to use of the cationic saccharides as flocculants and as strength agents.
Claims18
A method for producing cationic saccharides, comprising reacting saccharide with a compound having a conjugated electron withdrawing group via oxa-Michael addition reaction in presence of a base or mixture of bases for producing a derivatized saccharide;
- and cationizing the derivatized saccharide.
A derivatized saccharide comprising glucose or cellulose derivatized with a compound selected from compounds VII or VII
A cationic saccharide comprising cationic saccharides having the following formula XII
- wherein A represents a monosaccharide, a disaccharide, an oligosaccharide or a polysaccharide;
- B represents a cationic compound having formula R1R2C—CR4R3-EWG, wherein R1, R2, R3 and R4 represents independently a hydrogen atom or an alkyl chain having 1 to 20 carbon atoms, preferably the alkyl chain has 1 to 10 carbon atoms;
- EWG represents an electron withdrawing group, preferably a halogen, a nitrile, a carbonyl or a nitro group;
- and O having a bound to A is an oxygen atom of the monosaccharide, the disaccharide, the oligosaccharide or the polysaccharide.
Dependencies are inferred from the claim text.