Strongly basic, low chloride content anionic ion exchange resin - used for water purificn. in nuclear plants

Strongly basic, low chloride ion content anionic ion exchange resins are prepd. by treating an anionic resin in ionic chloride form and contg. a structural chlorine, with a basic soln. then with a soln. of an anion which displaces the chloride ion, converting to hydroxyl form and then rinsing with d...

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Bibliographische Detailangaben
1. Verfasser:	G. FENE, J. BOUTIER, P. GRAMMONT, A. B. PACHKOV, I. N. MEDVEDEV, E. V. ZAMBROVSKAJA, V. A. GRIGORJEV ET D. P. SOLNCEVA
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	Strongly basic, low chloride ion content anionic ion exchange resins are prepd. by treating an anionic resin in ionic chloride form and contg. a structural chlorine, with a basic soln. then with a soln. of an anion which displaces the chloride ion, converting to hydroxyl form and then rinsing with demineralised water. Improvement comprises pretreating the anionic resin with an 0.5-1.5N basic soln. at 10-30 deg.C to reduce the chloride content to 10-50%, conditioning it for at least 6 months at 10-30 deg.C until complete disappearance of the structural chlorine, again treating with a 2N basic soln. at 55-65 deg.C until a chloride content of 1-5% is obtd. and subsequently displacing the chloride ions with H2SO4 solns. of decreasing concns. at 55-65 deg.C to obtain a prod. contg. less than 50 mg chloride per kg. PROCEDE DE TRAITEMENT DE RESINES ANIONIQUES FORTEMENT BASIQUES DESTINEES A LA FABRICATION D'ECHANGEURS D'IONS AYANT UNE FAIBLE TENEUR EN IONS CHLORURE AFIN D'OBTENIR UN PRODUIT DIT DE QUALITE "NUCLEAIRE".