Method for preparing anionic macromolecular compound exhibiting improved water solubility

The present invention provides a method for removing a divalent metal cation from a macromolecular compound having an anionic functional group and containing the divalent metal cation, including (1) suspending a macromolecular compound having an anionic functional group and containing a divalent met...

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Bibliographische Detailangaben
Hauptverfasser:	Morodome, Keisuke, Okuni, Yoko, Saruhashi, Koichiro, Takeoka, Jun
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON DERIVATIVES THEREOF METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POLYSACCHARIDES THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	The present invention provides a method for removing a divalent metal cation from a macromolecular compound having an anionic functional group and containing the divalent metal cation, including (1) suspending a macromolecular compound having an anionic functional group and containing a divalent metal cation in a solution in which an electrolyte that releases an alkali metal ion is dissolved at a concentration at which the macromolecular compound is salted out, and (2) performing, in the obtained suspension, an ion exchange reaction to exchange the divalent metal cation contained in the macromolecular compound with the alkali metal ion.