RU95115236A - METHOD FOR PRODUCING POWDER ALPHA ALPHA-ALUMINUM - Google Patents

METHOD FOR PRODUCING POWDER ALPHA ALPHA-ALUMINUM

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Publication number
RU95115236A
RU95115236A RU95115236/25A RU95115236A RU95115236A RU 95115236 A RU95115236 A RU 95115236A RU 95115236/25 A RU95115236/25 A RU 95115236/25A RU 95115236 A RU95115236 A RU 95115236A RU 95115236 A RU95115236 A RU 95115236A
Authority
RU
Russia
Prior art keywords
specified
halogen
gaseous
group
gas
Prior art date
Application number
RU95115236/25A
Other languages
Russian (ru)
Other versions
RU2142413C1 (en
Inventor
Мори Масахиде
Матсуда Норио
Танака Синитиро
Утида Йосио
Савабе Йосинари
Ватанабе Хисаси
Огава Хироси
Original Assignee
Сумитото Кемикал Компани, Лимитед
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Publication date
Application filed by Сумитото Кемикал Компани, Лимитед filed Critical Сумитото Кемикал Компани, Лимитед
Priority claimed from PCT/JP1994/001989 external-priority patent/WO1995014638A1/en
Publication of RU95115236A publication Critical patent/RU95115236A/en
Application granted granted Critical
Publication of RU2142413C1 publication Critical patent/RU2142413C1/en

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Claims (13)

1. Способ получения порошкообразной альфа-окиси алюминия, отличающийся тем, что включает стадию гранулирования по крайней мере одного исходного материала окиси алюминия, выбранного из группы, состоящей из переходной окиси алюминия и соединения окиси алюминия с получением частиц и кальцинирования указанных частиц в галоидсодержащей атмосфере, которая включает газообразный галоидводород, газообразный галоид или смесь газообразного галоида и пара и содержит по крайней мере 0,1 об. % по крайней мере одного галоидсодержащего газа, выбранного из группы, состоящей из газообразного галоидводорода и газообразного галоида.1. The method of producing powdered alpha-alumina, characterized in that it comprises the step of granulating at least one starting alumina starting material selected from the group consisting of transition alumina and an alumina compound to produce particles and calcining said particles in a halogen-containing atmosphere, which includes gaseous hydrogen halide, gaseous halogen or a mixture of gaseous halogen and steam and contains at least 0.1 vol. % of at least one halide-containing gas selected from the group consisting of gaseous hydrogen halide and gaseous halogen. 2. Способ по п. 1, отличающийся тем, что концентрация указанного галоидсодержащего газа составляет по крайней мере 1 объемный %. 2. The method according to p. 1, characterized in that the concentration of the specified halogen-containing gas is at least 1 volume%. 3. Способ по п. 1, отличающийся тем, что указанный исходный материал содержит по крайней мере одну добавку, выбранную из группы, состоящей из затравочного кристалла и агента, регулирующего форму. 3. The method according to p. 1, characterized in that the source material contains at least one additive selected from the group consisting of a seed crystal and a shape-regulating agent. 4. Способ по п. 2, отличающийся тем, что указанный исходный материал окиси алюминия кальцинируют в атмосфере, содержащей галоидсодержащий газ, который генерируют подачей по крайней мере одного источника газа, выбранного из группы, состоящей из твердых или жидких источников газообразного галоидводорода и твердых или жидких источников газообразного галоида, непосредственно в кальцинирующую систему. 4. The method according to p. 2, characterized in that the specified alumina starting material is calcined in an atmosphere containing a halogen-containing gas, which is generated by supplying at least one gas source selected from the group consisting of solid or liquid sources of gaseous hydrogen halide and solid or liquid sources of gaseous halogen directly into the calcining system. 5. Способ по п. 3, отличающийся тем, что по крайней мере один источник газа, выбранный из группы, состоящей из твердых или жидких источников газообразного галоидводорода и твердых или жидких источников газообразного галоида, смешивают с указанным исходным материалом и затем смесь подают в кальцинирующую печь. 5. The method according to p. 3, characterized in that at least one gas source selected from the group consisting of solid or liquid sources of gaseous hydrogen halide and solid or liquid sources of gaseous halogen is mixed with the specified source material and then the mixture is fed into calcining bake. 6. Способ по п. 4 или 5, отличающийся тем, что температура кальцинирования составляет 600 - 1400oС.6. The method according to p. 4 or 5, characterized in that the temperature of calcination is 600 - 1400 o C. 7. Способ по п. 4 или 5, отличающийся тем, что указанный источник газообразного галоидводорода представляет аммонийгалоид. 7. The method according to p. 4 or 5, characterized in that said source of gaseous hydrogen halide is ammonium halide. 8. Способ по п. 7, отличающийся тем, что указанный аммонийгалоид представляет хлористый аммоний. 8. The method according to p. 7, characterized in that said ammonium halide is ammonium chloride. 9. Способ по п. 3, отличающийся тем, что указанный затравочный кристалл представляет по крайней мере одно соединение, выбранное из группы, состоящей из соединений алюминия, титана, ванадия, хрома, железа и никеля. 9. The method according to p. 3, characterized in that said seed crystal represents at least one compound selected from the group consisting of compounds of aluminum, titanium, vanadium, chromium, iron and nickel. 10. Способ по п. 3, отличающийся тем, что указанный агент, регулирующий форму, представляет по крайней мере один материал, выбранный из магния, кальция, стронция, иттрия, циркония, ниобия, ванадия, молибдена, меди, цинка, бора, кремния, лантана, церия, неодима и их соединений. 10. The method according to p. 3, characterized in that the specified agent that regulates the form, represents at least one material selected from magnesium, calcium, strontium, yttrium, zirconium, niobium, vanadium, molybdenum, copper, zinc, boron, silicon , lanthanum, cerium, neodymium and their compounds. 11. Способ по п. 1, отличающийся тем, что указанный исходный материал кальцинируют в атмосфере газа, содержащего по крайней мере 0,1 об.% указанного газообразного галоидводорода, при температуре 500 - 1400oС.11. The method according to p. 1, characterized in that the specified starting material is calcined in an atmosphere of gas containing at least 0.1 vol.% Of the specified gaseous hydrogen halide, at a temperature of 500 - 1400 o C. 12. Способ по п. 1, отличающийся тем, что указанный исходный материал кальцинируют в атмосфере газа, содержащей по крайней мере 0,1 об. % указанного газообразного галоида, при температуре 950 - 1500oС.12. The method according to p. 1, characterized in that the specified starting material is calcined in a gas atmosphere containing at least 0.1 vol. % of the specified gaseous halogen, at a temperature of 950 - 1500 o C. 13. Способ по п. 1, отличающийся тем, что указанный исходный материал кальцинируют в атмосфере газа, содержащей по крайней мере 0,1 об. % указанного газообразного галоида и по крайней мере 0.01 об.% пара, при температуре 500 до 1400oС.13. The method according to p. 1, characterized in that the specified starting material is calcined in a gas atmosphere containing at least 0.1 vol. % of the specified gaseous halogen and at least 0.01 vol.% steam, at a temperature of 500 to 1400 o C.
RU95115236A 1993-11-25 1994-11-25 Method of preparing powdered alpha-alumina RU2142413C1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP32116693 1993-11-25
JP5/321166 1993-11-25
JP5/299998 1993-11-30
JP29999893 1993-11-30
PCT/JP1994/001989 WO1995014638A1 (en) 1993-11-25 1994-11-25 PROCESS FOR PRODUCING α-ALUMINA POWDER

Publications (2)

Publication Number Publication Date
RU95115236A true RU95115236A (en) 1997-08-27
RU2142413C1 RU2142413C1 (en) 1999-12-10

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US (1) US6106800A (en)
EP (1) EP0680929B1 (en)
KR (1) KR960700194A (en)
CN (1) CN1071710C (en)
DE (1) DE69425816T2 (en)
RU (1) RU2142413C1 (en)
WO (1) WO1995014638A1 (en)

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