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AssigneeAsahi Glass Company, Limited
InventorsToshiya Matsubara, Masaharu Tanaka, Hajime Katayama, Kenji Yamada
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To provide a process for producing inorganic spheres having a substantially uniform particle size with high productivity. In a process for producing inorganic spheres, which comprises a step of injecting an alkaline aqueous liquid containing an inorganic compound into a laminar flow of an organic liquid containing a surfactant through micropores to form a W/O type emulsion, and a step of solidifying droplets of the aqueous liquid containing an inorganic compound in the W/O type emulsion by an acid to form inorganic spheres, as the organic liquid, one which is brought into contact with an acid in a state of the W/O type emulsion or after separated from the W/O type emulsion, or one which is brought into contact with the aqueous liquid and then separated and recovered, is used.
A process for producing inorganic spheres, which comprises a step of injecting an alkaline aqueous liquid containing an inorganic compound into a laminar flow of an organic liquid containing a surfactant and running at a flow rate of from 0.001 to 2 m/s in a flow path compartmentalized by diaphragms through micropores penetrating through one diaphragm in its thickness direction to form a W/O type emulsion, a step of solidifying droplets of the aqueous liquid containing an inorganic compound in the W/O type emulsion by an acid to form inorganic spheres, and a step of recycling the organic liquid separated and recovered from the W/O emulsion or a liquid after formation of the inorganic spheres, to the flow path for the organic liquid, wherein the organic liquid recycled to the flow path for the organic liquid is one which has been brought into contact with an acid in a state of the W/O emulsion or after separated from the W/o emulsion.
A process for producing inorganic spheres, which comprises a step of injecting an alkaline aqueous liquid containing an inorganic compound into a laminar flow of an organic liquid containing a surfactant and running at a flow rate of from 0.001 to 2 m/s in a flow path compartmentalized by diaphragms through micropores penetrating through one diaphragm in its thickness direction to form a W/O type emulsion, and a step of solidifying droplets of the aqueous liquid containing an inorganic compound in the W/O type emulsion by an acid to form inorganic spheres, wherein the organic liquid supplied to the flow path for the organic liquid is one which has been brought into contact with the alkaline aqueous liquid and then separated and recovered.
Dependencies are inferred from the claim text.