Transparent activated nonparticulate alumina and method of preparing same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C01F-007/02
B01J-023/08
출원번호
US-0396754
(1973-09-13)
발명자
/ 주소
Yoldas Bulent E. (Toledo OH)
출원인 / 주소
Owens-Illinois, Inc. (Toledo OH 02)
인용정보
피인용 횟수 :
27인용 특허 :
0
초록▼
A transparent, activated, nonparticulate alumina with a total porosity of about 63% which consists of a unique pore morphology and size distribution and is thermally stable up to about 1,200°C. at which temperature it can be nondestructively converted to alpha alumina is disclosed as well as a metho
A transparent, activated, nonparticulate alumina with a total porosity of about 63% which consists of a unique pore morphology and size distribution and is thermally stable up to about 1,200°C. at which temperature it can be nondestructively converted to alpha alumina is disclosed as well as a method of preparing said alumina by hydrolyzing aluminum alkoxides to form a particular sol which is essentially clear to the naked eye and the gel of which retains its integrity during drying and pyrolysis. The alumina thus produced is useful as a catalyst, absorbent and desiccant. In addition, a method of preparing the intermediate clear colloidal sol or gel consisting essentially of aluminum monohydrate is disclosed. This intermediate can be used to coat various substrates.
대표청구항▼
A method for preparing a transparent, monolithic, nonparticulate, porous product consisting essentially of alumina with a total porosity of at least 50% which comprises the steps of: a. providing an acid peptized, clear colloidal solution by hydrolyzing an aluminum alkoxide of the formula Al(OR)3, w
A method for preparing a transparent, monolithic, nonparticulate, porous product consisting essentially of alumina with a total porosity of at least 50% which comprises the steps of: a. providing an acid peptized, clear colloidal solution by hydrolyzing an aluminum alkoxide of the formula Al(OR)3, wherein R is an alkyl of 1-24 carbon atoms, with water, wherein the mole ratio of water to said alkoxide is at least 8:1 and wherein said acid peptization is effected with about 0.03 to about 0.250 moles of acid per mole of said alkoxide, said acid having an ionization constant of at least 1 ×105 and having a noncomplexing anion with aluminum, b. gelling said clear solution, and c. drying said gel and pyrolyzing same by heating at a rate sufficiently slow to preclude cracking at a temperature in excess of about 500° C. and for a time insufficient to form alpha Al2O3 but sufficient to form said transparent, monolithic, porous, nonparticulate Al2O3 product. A method for preparing a transparent, monolithic, nonparticulate, porous product consisting essentially of Al2O3 which comprises the steps of: a. providing a gel of the hydrolysis product obtained by hydrolyzing an aluminum alkoxide of the formula Al(OR)3, wherein R is an alkyl of 1-24 carbon atoms, with water and an acid wherein the mole ratio of water to said alkoXide is in the range of 8:1 to 20:1 and wherein said acid is employed in an amount of about .03 to about .250 moles of acid per mole of said alkoxide, said acid having an ionization constant of at least 1 ×105 and having a noncomplexing anion with aluminum, b. drying said gel, and c. pyrolyzing said gel by heating at a rate sufficiently slow to preclude cracking at a temperature in excess of about 500° C. so as to form said transparent, monolithic, porous, nonparticulate Al2O3 product, said heating being insufficient to form alpha alumina.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허를 인용한 특허 (27)
Dupin Thierry,FRX ; Lavina Jean,FRX ; Poisson Regis,FRX, Alumina agglomerates and process for the preparation thereof.
Bartholomew, Calvin H.; Woodfield, Brian F.; Huang, Baiyu; Olsen, Rebecca Elizabeth; Astle, Lynn, Method for making highly porous, stable metal oxides with a controlled pore structure.
Dolling, Kai; Brasch, Andrea, Method for producing aluminum trihydrates having a high pore volume, aluminum trihydrates produced according to this method and the use thereof.
Rouanet Stephane Fabrice ; McGovern William Edward ; Cao Wanqing ; Moses John M. ; Carrillo Angel L. ; Klotz Irving M., Method of forming particles using a supercritical fluid.
Rouanet Stephane Fabrice ; McGovern William Edward ; Cao Wanging ; Moses John M. ; Carrillo Angel L. ; Klotz Irving M., Method of forming particles using a supercritical fluid, aerogel particles formed thereby, and antiperspirants contain.
Alary, Jean-Andre; Cot, Louis; Gugliermotte, Francis; Larbot, Andre; Guizard, Christian, Method of manufacturing a medium for microfiltration, for ultrafiltration, or for reverse osmosis.
Noweck Klaus,DEX ; Schimanski Jurgen,DEX ; Meyer Arnold,DEX, Process for producing water-dispersible alumina hydrates having a nanocrystalline structure and use thereof.
Paolasini Sergio (Turin ITX), Process for the manufacture of a monolithic support for catalysts suitable for use in controlling carbon monoxide emissi.
Leenaars Adriaan F. M. (P.O. Box 217 7500 AE Enschede NLX) Burggraaf Anthonie J. (P.O. Box 217 7500 AE Enschede NLX) Keizer Klass (P.O. Box 217 7500 AE Enschede NLX), Process for the production of crack-free semi-permeable inorganic membranes.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.