Alumina body formation using high pH
AssigneeLa Roche Industries Inc.
InventorVladislav I. Kanazirev
Life of this patent
Estimating the term…
Abstract
A method of producing activated alumina bodies having alkali or alkaline earth metal compounds incorporated therein, the bodies having increased surface area and crush resistance, the method comprising providing a source of activated alumina powder and an aqueous solution having an alkali or alkaline metal hydroxide dissolved therein, the solution having a pH in the range of 12 to 13.5. The activated alumina powder is formed into bodies, and are treated with the aqueous solution to form alumina bodies having alkali or alkaline earth metal compounds incorporated therein. The alumina bodies are heated to provide activated alumina bodies having increased surface area and crush resistance.
Claims33
A method of producing activated alumina bodies having alkali or alkaline earth metal compounds incorporated therein, the bodies having increased surface area and crush resistance, the method comprising:
- (a) providing a source of activated alumina powder;
- (b) providing an aqueous solution having an alkali or alkaline earth metal compound dissolved therein, the solution having a pH in the range of 12.7 to 14;
- (c) forming said activated alumina powder into bodies;
- (d) treating said bodies with said aqueous solution at a temperature range of from room temperature to 200.degree. F. to provide alumina bodies having said alkali or alkaline earth metal compounds incorporated therein;
- and
- (e) heating said alumina bodies to provide said activated alumina bodies having increased surface area and crush resistance.
A method of producing activated alumina bodies, the bodies having increased surface area and crush resistance, the method comprising:
- (a) providing a source of activated alumina powder;
- (b) providing an aqueous solution containing an alkali metal hydroxide comprised of sodium hydroxide dissolved therein, the solution having a pH in the range of 12.7 to 14;
- (c) forming said activated alumina powder into bodies;
- (d) as said bodies are forming, spraying said bodies with said aqueous solution at a temperature range of from room temperature to 200.degree. F. to form alumina bodies having sodium compounds incorporated therein;
- and
- (e) heating said alumina bodies to provide said activated alumina bodies having improved surface area and crush strength.
A method of producing activated alumina bodies having alkali or alkaline earth metal compounds incorporated therein, the bodies having increased surface area and crush resistance, the method comprising:
- (a) providing a source of activated alumina powder;
- (b) providing an aqueous solution containing an alkali or alkaline earth metal hydroxide dissolved therein, the solution having a pH in the range of 12.7 to 13.5;
- (c) mixing said powder and said solution to form a mixture and forming the mixture into bodies;
- and
- (d) heating said bodies to provide said activated alumina bodies having alkali or alkaline earth metal compounds incorporated therein.
A method of producing activated alumina bodies having alkali or alkaline earth metal compounds incorporated therein, the method comprising:
- (a) providing a source of alumina bodies;
- (b) providing an aqueous solution having an alkali or alkaline earth metal compound dissolved therein, the solution having a pH in the range of 12.7 to 14;
- (c) treating said bodies with said aqueous solution at a temperature range of from room temperature to 200.degree. F. to provide alumina bodies having said alkali or alkaline earth metal compounds incorporated therein;
- and
- (d) heating said alumina bodies to provide said activated alumina bodies having increased surface area and crush resistance.
Dependencies are inferred from the claim text.