GB459058A - Process for the manufacture of colloidal silicic acid (silica gel) from water glass - Google Patents
Process for the manufacture of colloidal silicic acid (silica gel) from water glassInfo
- Publication number
- GB459058A GB459058A GB1923335A GB1923335A GB459058A GB 459058 A GB459058 A GB 459058A GB 1923335 A GB1923335 A GB 1923335A GB 1923335 A GB1923335 A GB 1923335A GB 459058 A GB459058 A GB 459058A
- Authority
- GB
- United Kingdom
- Prior art keywords
- silica gel
- water glass
- litre
- manufacture
- silicic acid
- 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
-
- 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)
- Dispersion Chemistry (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Silicon Compounds (AREA)
- Glass Melting And Manufacturing (AREA)
Abstract
Silica gel is obtained by precipitating water glass with an acid ammonium sulphate solution in such a quantity that after the separation of the gel, the remaining liquid has a pH between 2 and 5, preferably 2,5 and 4. According to an example one litre of normal hydrochloric acid and one litre of normal ammonium sulphate solution are added separately but simultaneously to one litre of a water glass solution with brisk stirring, the pH of the resulting mixture being 3. The reaction is conducted at or slightly below room temperature. After standing for 24 hours the silica gel is separated, freed from impurities in known manner and dried.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1923335A GB459058A (en) | 1935-07-05 | 1935-07-05 | Process for the manufacture of colloidal silicic acid (silica gel) from water glass |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1923335A GB459058A (en) | 1935-07-05 | 1935-07-05 | Process for the manufacture of colloidal silicic acid (silica gel) from water glass |
Publications (1)
Publication Number | Publication Date |
---|---|
GB459058A true GB459058A (en) | 1937-01-01 |
Family
ID=10125919
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1923335A Expired GB459058A (en) | 1935-07-05 | 1935-07-05 | Process for the manufacture of colloidal silicic acid (silica gel) from water glass |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB459058A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2561304A (en) * | 1947-10-30 | 1951-07-17 | Philadelphia Quartz Co | Process for the production of finely divided amorphous silica |
US2772957A (en) * | 1953-11-09 | 1956-12-04 | American Chrome Company | Method of processing disseminated chromite ores |
-
1935
- 1935-07-05 GB GB1923335A patent/GB459058A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2561304A (en) * | 1947-10-30 | 1951-07-17 | Philadelphia Quartz Co | Process for the production of finely divided amorphous silica |
US2772957A (en) * | 1953-11-09 | 1956-12-04 | American Chrome Company | Method of processing disseminated chromite ores |
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