Heat-resistant aluminum hydroxide and method for preparation thereof
AssigneeKawai-Lime Ind. Co. Ltd.
InventorsHirofumi Mitsunaka, Kenji Kido, Hirokazu Kihou
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Abstract
A heat-resistant aluminum hydroxide which is prepared by subjecting a mixture of aluminum hydroxide with a reaction retardant for retarding the conversion aluminum hydroxide to boehmite, as a raw material, to the hydrothermal treatment or to pressurization and heating in a steam atmosphere; and a method for preparing a heat-resistant aluminum hydroxide which comprises subjecting a mixture of aluminum hydroxide with a reaction retardant for retarding the conversion aluminum hydroxide to boehmite as a raw material to the hydrothermal treatment, or to pressurization and heating in a steam atmosphere.
Claims17
A heat-resistant aluminum hydroxide characterized by being prepared by processing a raw material mixture of aluminum hydroxide and a reaction retarder for delaying boehmite conversion by hydrothermal treatment or by applying pressure and heat under a steam atmosphere.
A heat-resistant aluminum hydroxide characterized by being prepared by heating a raw material mixture of aluminum hydroxide and a reaction retarder for delaying boehmite conversion in a pressure vessel without addition of water.
The heat-resistant aluminum hydroxide according to claim to 4, wherein the amount of the reaction retarder added is 0.05 to 10 parts by weight with respect to 100 parts by weight of the aluminum hydroxide.
A heat-resistant aluminum hydroxide, characterized by having a 1% dehydration temperature of 255° C. or more and a total amount of dehydration water of 30% or more.
A method of producing a heat-resistant aluminum hydroxide, characterized by processing a raw mixture of aluminum hydroxide and a reaction retarder for delaying boehmite conversion by hydrothermal treatment or by applying pressure and heat under a steam atmosphere.
A method of producing a heat-resistant aluminum hydroxide, characterized by heating a raw mixture of aluminum hydroxide and a reaction retarder for delaying boehmite conversion in a pressure vessel without addition of water.
Dependencies are inferred from the claim text.