URANIUM ADSORBENT AND ITS PRODUCTION

• Main Authors: ISHIGAKI ISAO, OKAMOTO JIROU, SUGOU TAKANOBU
• Format: Patent
• Language: English
• Published: 30.11.1983
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; DECONTAMINATION ARRANGEMENTS THEREFOR; INORGANIC CHEMISTRY; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PHYSICS; PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT; THEIR PREPARATION OR CHEMICAL WORKING-UP; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

PURPOSE:To form an adsorbent having excellent adsorption and desorption efficiency for uranium, mechanical strength and durability in an optional shape by allowing an uranium adsorptive layer contg. an amidoxime group to exist locally on the surface of the adsorbent by a radiation graft polymn. method. CONSTITUTION:Ionizing radiations are beforehand irradiated to a base material consisting of an org. or inorg. or their composite material of an optional shape; thereafter, the base material is brought into contact with 1 or >=2 kinds of polymers contg. a nitrile group and polymerizable monomers which can convert the nitrile group to amidoxime when said polymers are caused to react with hydroxylamine (e.g., acrylonitrile, vinylidene cyanide) or the ionizing radiations are irradiated to said base material while the material is held in contact with said polymerizable monomers, to produce the graft polymer grafted with said polymerizable monomers only on the surface or surface layer of the base material. The graft polymer is caused to react with hydroxylamine to convert the nitrile group in the graft chain to an amidoxime group.