Carbonaceous ion exchanger made from wood charcoal - which is subjected to triple heat treatment so it has high ion exchange capacity and high selectivity

Carbonaceous ion exchanger made from wood charcoal - which is subjected to triple heat treatment so it has high ion exchange capacity and high selectivity

Wood charcoal is oxidised at 200-300 deg.C., esp. at 260-290 deg.C. The oxidised charcoal is next heated at 450-700, esp. 550-650 deg.C., in the absence of oxygen, followed by a reoxidn. treatment at 290-330 deg.C. Ion exchangers are used e.g. for the purificn. of chemicals; for the purificn. of bri...

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1. Verfasser: ARKADY NIKOLAEVICH ZAVYALOV, LEONID MIKHAILOVICH EFIMOV, ALEXANDR GRIGORIEVICH BURMISTROV, IRINA ANATOLIEVNA TARKOVSKAYA, ZINAIDA DMITRIEVNA DULYA, TAIRA KHUSAINOVNA ORLOVA ET DMITRY NIKOLAEVICH STRAZHESKO
Format: Patent
Sprache:eng ; fre
Schlagworte:
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Zusammenfassung:Wood charcoal is oxidised at 200-300 deg.C., esp. at 260-290 deg.C. The oxidised charcoal is next heated at 450-700, esp. 550-650 deg.C., in the absence of oxygen, followed by a reoxidn. treatment at 290-330 deg.C. Ion exchangers are used e.g. for the purificn. of chemicals; for the purificn. of brine during the mfr. of C12, thus removing electrolyte poisons; or as catalysts. This method provides a substitute for expensive ion exchangers. Wood charcoal is readily available and inexpensive. Any type of wood may be used to make the charcoal, although the pref woods are birch; aspen; poplar; hornbeam or beech. L'INVENTION CONCERNE L'OBTENTION DE SORBANTS CARBONES.LE PROCEDE FAISANT L'OBJET DE L'INVENTION EST DU TYPE COMPRENANT UNE OXYDATION DE CHARBON DE BOIS A UNE TEMPERATURE ELEVEE ET EST CARACTERISE EN CE QUE LADITE OXYDATION EST EFFECTUEE A UNE TEMPERATURE DE 200 ET 300C CETTE OPERATION ETANT SUIVIE D'UN TRAITEMENT THERMIQUE DU CHARBON DE BOIS OXYDE A UNE TEMPERATURE DE 450 ET 700C SANS ACCES D'OXYGENE, ET DE SON OXYDATION A UNE TEMPERATURE DE 290 ET 330C.L'ECHANGEUR D'IONS EN QUESTION PEUT ETRE UTILISE NOTAMMENT POUR L'EPURATION DES AGENTS CHIMIQUES, LORS DE LA PREPARATION DE SUBSTANCES D'UNE PURETE PARTICULIERE POUR L'EPURATION DES SAUMURES RESULTANT DE LA PRODUCTION DU CHLORE AFIN DE LES DEBARRASSER DES POISONS D'ELECTROLYSE AINSI QU'EN TANT QUE CATALYSEURS, ETC.