GB136543A - - Google Patents
Info
- Publication number
- GB136543A GB136543A GB3061119A GB3061119A GB136543A GB 136543 A GB136543 A GB 136543A GB 3061119 A GB3061119 A GB 3061119A GB 3061119 A GB3061119 A GB 3061119A GB 136543 A GB136543 A GB 136543A
- Authority
- GB
- United Kingdom
- Prior art keywords
- temperature
- silica
- drying
- gel
- solutions
- 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
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
- B01J21/08—Silica
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
- C01B33/152—Preparation of hydrogels
- C01B33/154—Preparation of hydrogels by acidic treatment of aqueous silicate solutions
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Silicon Compounds (AREA)
Abstract
A silica gel, suitable for absorbing gases and capable of retaining its properties up to 700 DEG C., is obtained by mixing equal volumes of an acid, such as hydrochloric acid, and sodium silicate solution of such strength that all the silica is liberated, and efficiently stirring the mixture so that immediate separation of silica is prevented. The temperature of the solutions may be 35-80 DEG C., preferably 45-55 DEG C. When the gel has formed, it is broken up, washed, and slowly dried. The drying is effected in a current of air at 75-120 DEG C. followed by increasing the temperature to 300-400 DEG C., or by drying at the lower range of temperature in a vacuum.ALSO:A silica gel, suitable for absorbing gases and capable of retaining its properties up to 700 DEG C., is obtained by mixing equal volumes of an acid, such as hydrochloric acid, and sodium silicate solutions of such strength that all the silica is liberated, and efficiently stirring the mixture so that immediate separation of silica is prevented. The temperature of the solutions may be 35-80 DEG C., preferably 45-55 DEG C When the gel has formed, it is broken up, washed, and slowly dried. The drying is effected in a current of air at 75-120 DEG C., followed by increasing the temperature to 300-400 DEG C., or by drying at the lower range of temperature in a vacuum.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US507068XA | 1918-12-07 | 1918-12-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB136543A true GB136543A (en) | 1921-04-06 |
Family
ID=21966902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3061119A Expired GB136543A (en) | 1918-12-07 | 1919-12-06 |
Country Status (3)
| Country | Link |
|---|---|
| CY (1) | CY7A (en) |
| FR (1) | FR507068A (en) |
| GB (1) | GB136543A (en) |
-
1919
- 1919-12-04 FR FR507068A patent/FR507068A/en not_active Expired
- 1919-12-06 GB GB3061119A patent/GB136543A/en not_active Expired
-
1924
- 1924-09-29 CY CY724A patent/CY7A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR507068A (en) | 1920-09-04 |
| CY7A (en) | 1924-09-29 |
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