JP2503370B2 - 二酸化チタン−混合酸化物及びその製法 - Google Patents
二酸化チタン−混合酸化物及びその製法Info
- Publication number
- JP2503370B2 JP2503370B2 JP5264899A JP26489993A JP2503370B2 JP 2503370 B2 JP2503370 B2 JP 2503370B2 JP 5264899 A JP5264899 A JP 5264899A JP 26489993 A JP26489993 A JP 26489993A JP 2503370 B2 JP2503370 B2 JP 2503370B2
- Authority
- JP
- Japan
- Prior art keywords
- mixed oxide
- titanium dioxide
- mixed
- oxide
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims description 7
- 239000010936 titanium Substances 0.000 title claims description 7
- 229910052719 titanium Inorganic materials 0.000 title claims description 7
- 238000000034 method Methods 0.000 title claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 21
- 239000004408 titanium dioxide Substances 0.000 claims description 11
- 238000006460 hydrolysis reaction Methods 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 230000007062 hydrolysis Effects 0.000 claims description 8
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 239000007795 chemical reaction product Substances 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 2
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims description 2
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 239000005049 silicon tetrachloride Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 claims 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910003902 SiCl 4 Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000012760 heat stabilizer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PHTHEUNUXVDUOD-UHFFFAOYSA-N aluminum oxygen(2-) titanium(4+) Chemical compound [O-2].[O-2].[Ti+4].[O-2].[Al+3] PHTHEUNUXVDUOD-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- TVUBDAUPRIFHFN-UHFFFAOYSA-N dioxosilane;oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4].O=[Si]=O TVUBDAUPRIFHFN-UHFFFAOYSA-N 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910001510 metal chloride Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 230000000475 sunscreen effect Effects 0.000 description 1
- 239000000516 sunscreening agent Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/12—Silica and alumina
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/082—Decomposition and pyrolysis
- B01J37/088—Decomposition of a metal salt
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/003—Titanates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/07—Producing by vapour phase processes, e.g. halide oxidation
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
- C01P2006/13—Surface area thermal stability thereof at high temperatures
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Ceramic Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Thermal Sciences (AREA)
- Structural Engineering (AREA)
- Catalysts (AREA)
- Silicon Compounds (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Cosmetics (AREA)
Description
した二酸化チタン−混合酸化物及びその製法に関する。
で、加水分解法により製造することは公知である。こう
して、西独特許公開第952891号公報にはアルミニ
ウム及びチタン又はチタン及び珪素の混合酸化物の製法
が記載されており、そこでは分裂温度を250〜650
℃の範囲に保持する。
炎加水分解法で製造された二酸化珪素−二酸化チタン−
混合酸化物を記載しており、これは二酸化珪素99.9
〜91.1重量%及び二酸化チタン0.1〜9.9重量
%を含有する。
炎加水分解により製造した酸化アルミニウム−二酸化チ
タン−混合酸化物を記載しており、これは酸化アルミニ
ウム56重量%および二酸化チタン44重量%を含有す
る。
した、酸化アルミニウム1〜30重量%又は二酸化珪素
1〜30重量%を混合酸化物の成分として含有し、BE
T−表面積40〜120m2/gである二酸化チタン−
混合酸化物である。
ら火炎加水分解により均質な混合酸化物が製造される。
この混合酸化物は比表面積40〜120m2/gを有し
ており、かつ公知顔料より微細である。この粒径は5〜
100nmの間である。
に関する限定及びSiO2もしくはAl2O3の含量の
ために公知の二酸化チタンP25より大きな温度範囲に
わたって安定である。特に、その表面積を失うことな
く、二酸化チタン/二酸化珪素−混合酸化物を温度80
0℃に加熱することができる、すなわちか焼することが
できる。
チタン−混合酸化物は次の物理化学的特性を有する: Al2O3−含量 1〜30重量% SiO2−含量 1〜30重量% 比表面積 10〜150m2/g 一次粒径 5〜100nm スタンピング密度 50〜400g/l 強熱減量(100℃で二時間) 0.5〜5重量% クロリド含量 <1重量% ルチル含量 20〜90% 本発明のもう一つの課題は、無水塩化アルミニウム又は
四塩化珪素を蒸発させ、不活性ガス、例えば窒素、と共
に公知バーナーの混合室中に導入し、そこで水素、空気
及びガス状四塩化チタンとを相応して構成されたAl2
O3/TiO2−混合酸化物又はSiO2/TiO2−
混合酸化物が生じるような比で混合し、この4−成分混
合物を反応室で燃焼させ、その後固体二酸化チタン−混
合酸化物をガス状反応生成物から分離し、場合により付
着した塩化水素を湿った空気中で除去することを特徴と
する、請求項1による火炎加水分解により製造した二酸
化チタン−混合酸化物の製法である。
〜3000℃の温度で実施することが出来る。
媒、触媒担体、光触媒、セラミック、オートラッカー及
び化粧品(特に、日焼け止め中のUV−吸収剤として)
の製造のために、及びシリコンゴム中の熱安定化剤とし
て使用することが出来る。
有利に、表面の高い温度安定性を示す。この酸化物は微
細粒状で、非常に均一で、非常に純粋であり、かつ高い
分散性を有する。
及びTiCl4を分離した2つの蒸発装置で気化し(蒸
発装置の温度:AlCl3;250℃、SiCl4;1
00℃、TiCl4;200℃)、かつこれらのクロリ
ド蒸気を窒素によりバーナーの混合室に導入する。そこ
で、これらを水素及び乾燥空気及び/又は酸素と混合し
て、反応室で燃焼する。凝集域中で反応生成物を約11
0℃に冷却する。引き続き、この混合酸化物をフィルタ
ーで分離する。この粉末を500〜700℃の温度で湿
った空気で処理することにより、付着するクロリドを除
去する。
成物の特性を第1表及び第2表中にまとめる。
参照)の比表面積を500〜800℃の温度でか焼した
後に測定した。保持時間はそれぞれ4時間であった。比
較材料としては無添加パイロゼン・チタンオキシドP2
5(BET50m2/g)を使用した。結果を図1に示
す。
落ちこむ。
り安定な表面を有する材料を供給する(800℃:P2
5の12m2/gの代わりに30m2/g)。
度範囲全体にわたって表面積が安定である粉末が得られ
る。
出来、こうして特に触媒及び触媒担体の製造に好適であ
る。
性を示す図である。
Claims (2)
- 【請求項1】 火炎加水分解により製造した、酸化アル
ミニウム1〜30重量%又は二酸化珪素1〜30重量%
を混合酸化物の成分として含有し、BET−表面積40
〜120m2/gである二酸化チタン−混合酸化物。 - 【請求項2】 無水塩化アルミニウム又は四塩化珪素を
蒸発させ、不活性ガスと共に公知バーナーの混合室中に
導入し、そこで水素、空気及びガス状四塩化チタンとを
相応して構成されたAl2O3/TiO2−混合酸化物
又はSiO2/TiO2−混合酸化物が生じるような比
で混合し、この4−成分混合物を反応室中で燃焼させ、
その後固体二酸化チタン−混合酸化物をガス状反応生成
物から分離し、場合により付着した塩化水素を湿った空
気中で除去することを特徴とする、請求項1による火炎
加水分解により製造した二酸化チタン−混合酸化物の製
法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4235996A DE4235996A1 (de) | 1992-10-24 | 1992-10-24 | Flammenhydrolytisch hergestelltes Titandioxid-Mischoxid, Verfahren zu seiner Herstellung und Verwendung |
DE4235996.1 | 1992-10-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06191848A JPH06191848A (ja) | 1994-07-12 |
JP2503370B2 true JP2503370B2 (ja) | 1996-06-05 |
Family
ID=6471298
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5264899A Expired - Lifetime JP2503370B2 (ja) | 1992-10-24 | 1993-10-22 | 二酸化チタン−混合酸化物及びその製法 |
Country Status (4)
Country | Link |
---|---|
US (3) | US5451390A (ja) |
EP (1) | EP0595078B1 (ja) |
JP (1) | JP2503370B2 (ja) |
DE (2) | DE4235996A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7615201B2 (en) | 2001-07-23 | 2009-11-10 | Shin-Etsu Chemical Co., Ltd. | Spherical particles of silica-containing compound oxide and method of production |
Families Citing this family (60)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4235996A1 (de) * | 1992-10-24 | 1994-04-28 | Degussa | Flammenhydrolytisch hergestelltes Titandioxid-Mischoxid, Verfahren zu seiner Herstellung und Verwendung |
US5698177A (en) * | 1994-08-31 | 1997-12-16 | University Of Cincinnati | Process for producing ceramic powders, especially titanium dioxide useful as a photocatalyst |
JP3596834B2 (ja) * | 1995-06-14 | 2004-12-02 | 東陶機器株式会社 | 自己浄化性表面を備えた道路標識用反射板 |
EP0780158B1 (en) * | 1995-12-21 | 2001-06-13 | Asahi Glass Company Ltd. | Photocatalyst composition and process for its production, and photocatalyst composition attached substrate |
JPH09231821A (ja) * | 1995-12-22 | 1997-09-05 | Toto Ltd | 照明器具及び照度維持方法 |
DE19650500A1 (de) * | 1996-12-05 | 1998-06-10 | Degussa | Dotierte, pyrogen hergestellte Oxide |
JP3511832B2 (ja) * | 1997-02-21 | 2004-03-29 | 株式会社村田製作所 | 光化学反応用チタン化合物およびその製造方法 |
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EP1060128A4 (en) | 1998-02-24 | 2005-08-03 | Rotem Amfert Negev Ltd | MODIFIED TITANIUM DIOXIDE AND PROCESS FOR PREPARING THE SAME |
EP1094990A1 (en) * | 1998-04-22 | 2001-05-02 | Corning Incorporated | Methods for making ultra-low expansion silica-titania glasses |
GB9812833D0 (en) * | 1998-06-15 | 1998-08-12 | South Bank Univ Entpr Ltd | Ceramic composites |
DE19844325A1 (de) * | 1998-09-28 | 2000-03-30 | Degussa | Verfahren zur Herstellung von Alkoholen durch katalytische Hydrierung von Aldehyden oder Ketonen |
DE19848480A1 (de) * | 1998-10-21 | 2000-05-04 | Degussa | Verfahren zur Verbesserung der Stabilität von Polymeren |
US6294436B1 (en) | 1999-08-16 | 2001-09-25 | Infineon Technologies Ag | Method for fabrication of enlarged stacked capacitors using isotropic etching |
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US6572964B2 (en) | 2000-02-04 | 2003-06-03 | Showa Denko K.K. | Ultrafine mixed-crystal oxide, production process and use thereof |
TWI272251B (en) * | 2000-02-04 | 2007-02-01 | Showa Denko Kk | Process for producing ultrafine mixed-crystal oxide |
JP2001316115A (ja) | 2000-03-28 | 2001-11-13 | Degussa Ag | ドーピングされた二酸化チタン |
ES2335187T3 (es) * | 2000-03-29 | 2010-03-23 | Evonik Degussa Gmbh | Dioxido de titanio dopado. |
KR100376247B1 (ko) * | 2000-04-07 | 2003-03-15 | 삼화페인트공업주식회사 | 화염을 이용한 기상산화반응에 의한 나노사이즈이산화티타늄 초미분체 제조 방법 |
ATE496004T1 (de) | 2000-09-26 | 2011-02-15 | Evonik Degussa Gmbh | Eisenoxid- und siliciumdioxid-titandioxid- mischung |
US6777152B2 (en) | 2001-03-30 | 2004-08-17 | Shin-Etsu Chemical Co., Ltd. | Electrostatic image developer |
US20030044706A1 (en) * | 2001-03-30 | 2003-03-06 | Yoshiharu Konya | Electrostatic image developer |
AU2002356941A1 (en) * | 2001-11-15 | 2003-06-10 | Pq Holding, Inc. | Method for controlling synthesis conditions during molecular sieve synthesis using combinations of quaternary ammonium hydroxides and halides |
DE10163940A1 (de) * | 2001-12-22 | 2003-07-17 | Degussa | Silicium-Tantal- und Silicium-Niobium-Mischoxidpulver, deren Herstellung und Verwendung |
DE10163938A1 (de) | 2001-12-22 | 2003-07-10 | Degussa | Flammenhydrolytisch hergestelltes Silicium-Titan-Mischoxidpulver mit an der Oberfläche angereichertem Siliciumdioxid, dessen Herstellung und Verwendung |
DE10163939A1 (de) | 2001-12-22 | 2003-07-10 | Degussa | Schicht erhalten aus einer wässerigen Dispersion enthaltend flammenhydrolytisch hergestelltes Silicium-Titan-Mischoxidpulver |
DE10205920A1 (de) * | 2002-02-12 | 2003-08-21 | Itn Nanovation Gmbh | Nanoskaliger Rutil, sowie Verfahren zu dessen Herstellung |
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US8697654B2 (en) | 2008-12-18 | 2014-04-15 | E I Du Pont De Nemours And Company | Peptide linkers for effective multivalent peptide binding |
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GB707560A (en) * | 1951-04-11 | 1954-04-21 | Du Pont | Improvements in and relating to the manufacture of pigmentary titanium dioxide |
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DE3840196C1 (ja) * | 1988-11-29 | 1990-04-12 | Bayer Ag, 5090 Leverkusen, De | |
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-
1992
- 1992-10-24 DE DE4235996A patent/DE4235996A1/de not_active Ceased
-
1993
- 1993-10-06 DE DE59306172T patent/DE59306172D1/de not_active Expired - Lifetime
- 1993-10-06 EP EP93116133A patent/EP0595078B1/de not_active Expired - Lifetime
- 1993-10-22 US US08/139,708 patent/US5451390A/en not_active Expired - Lifetime
- 1993-10-22 JP JP5264899A patent/JP2503370B2/ja not_active Expired - Lifetime
-
1995
- 1995-04-18 US US08/423,349 patent/US5672330A/en not_active Expired - Lifetime
-
1996
- 1996-08-01 US US08/690,918 patent/US5762914A/en not_active Expired - Lifetime
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US7615201B2 (en) | 2001-07-23 | 2009-11-10 | Shin-Etsu Chemical Co., Ltd. | Spherical particles of silica-containing compound oxide and method of production |
Also Published As
Publication number | Publication date |
---|---|
EP0595078A2 (de) | 1994-05-04 |
DE59306172D1 (de) | 1997-05-22 |
US5762914A (en) | 1998-06-09 |
EP0595078B1 (de) | 1997-04-16 |
US5672330A (en) | 1997-09-30 |
US5451390A (en) | 1995-09-19 |
EP0595078A3 (de) | 1994-12-21 |
JPH06191848A (ja) | 1994-07-12 |
DE4235996A1 (de) | 1994-04-28 |
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