ES384189A1 - A method of preparing particles spherical alumina low density, improved resistance to understanding. (Machine-translation by Google Translate, not legally binding) - Google Patents
A method of preparing particles spherical alumina low density, improved resistance to understanding. (Machine-translation by Google Translate, not legally binding)Info
- Publication number
- ES384189A1 ES384189A1 ES384189A ES384189A ES384189A1 ES 384189 A1 ES384189 A1 ES 384189A1 ES 384189 A ES384189 A ES 384189A ES 384189 A ES384189 A ES 384189A ES 384189 A1 ES384189 A1 ES 384189A1
- Authority
- ES
- Spain
- Prior art keywords
- chloride
- alumina
- particles
- hexamethylenetetraamine
- translation
- 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
Links
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
A method of preparing spherical particles of low density alumina, of improved compression strength, comprising: (a) digesting aluminum in an acid chloride selected from the group consisting of hydrochloric acid and aluminum chloride in aqueous solution and forming a sol of alumina having a weight ratio of aluminum to chloride in the range of from about 1: 1 to about 1.5: 1, (b) separately preparing an aqueous solution of hexamethylenetetraamine, (c) mixing, at a lower temperature than the gelation is the hexamethylenetetraamine solution and the alumina sol in amounts that provide a molar ratio of hexamethylenetetraamine to chloride of from about 1: 4 to about 1.25: 4, which effects substantially complete neutralization of said chloride, and which to the resulting mixture an alumina concentration of from about 6 to about 10% by weight, (d) dispersing said mixture in a of droplets in an oil maintained at a temperature of from about 49ºC to about 104ºC and effecting its gelation, (e) aging the resultant gel particles in said oil at a temperature of from about 116ºC to about 260º c, and at a superatmospheric pressure that maintains the water content of said particles substantially in the liquid phase and effect substantially complete hydrolysis of the residual hexamethylenetetraamine, (f) wash, dry and burn the aged particles, and (g) recover the high strength and low spherical alumina particles apparent density. (Machine-translation by Google Translate, not legally binding)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES384189A ES384189A1 (en) | 1970-10-02 | 1970-10-02 | A method of preparing particles spherical alumina low density, improved resistance to understanding. (Machine-translation by Google Translate, not legally binding) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES384189A ES384189A1 (en) | 1970-10-02 | 1970-10-02 | A method of preparing particles spherical alumina low density, improved resistance to understanding. (Machine-translation by Google Translate, not legally binding) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES384189A1 true ES384189A1 (en) | 1973-01-01 |
Family
ID=8456926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES384189A Expired ES384189A1 (en) | 1970-10-02 | 1970-10-02 | A method of preparing particles spherical alumina low density, improved resistance to understanding. (Machine-translation by Google Translate, not legally binding) |
Country Status (1)
| Country | Link |
|---|---|
| ES (1) | ES384189A1 (en) |
-
1970
- 1970-10-02 ES ES384189A patent/ES384189A1/en not_active Expired
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