GB1188182A - Hydrophilic Silica Sol - Google Patents
Hydrophilic Silica SolInfo
- Publication number
- GB1188182A GB1188182A GB1716667A GB1716667A GB1188182A GB 1188182 A GB1188182 A GB 1188182A GB 1716667 A GB1716667 A GB 1716667A GB 1716667 A GB1716667 A GB 1716667A GB 1188182 A GB1188182 A GB 1188182A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sio
- concentration
- sol
- alkali metal
- silicates
- 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
- C01B33/141—Preparation of hydrosols or aqueous dispersions
- C01B33/1412—Preparation of hydrosols or aqueous dispersions by oxidation of silicon in basic medium
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Silicon Compounds (AREA)
Abstract
1,188,182. Silica sol; silicates. PHILADELPHIA QUARTZ CO. 14 April, 1967 [10 May, 1966], No. 17166/67. Heading C1A. Stable hydrophilic silica sols are prepared by reacting elemental Si with water in the presence initially of at least 1À5% by weight NaOH whilst maintaining the SiO 2 concentration below 12%. As exemplified, Si and water are added incrementally to maintain the desired concentration. The resultant sol (which may contain sodium silicate) may be concentrated to 10-52% SiO 2 and if desired the resultant sol may be dried to form particulate SiO 2 or SiO 2 gel. Reaction temperatures from 20-200‹ C. are specified. Sodium, lithium or potassium silicates with high SiO 2 /alkali metal oxide ratios may be obtained by adding to the sol NaOH, KOH, LiOH or the corresponding silicates. The NaOH used for the reaction may be replaced by an equivalent amount of another alkali metal base, e.g. KOH, CsOH or alkali metal silicate. The sols, where desired after concentration, may have a particle diameter of 15-50 mm., a concentration of 10-52% SiO 2 at pH 9-10À2 and a SiO 2 /Na 2 O ratio (defined) of 180-500.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US54884166A | 1966-05-10 | 1966-05-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1188182A true GB1188182A (en) | 1970-04-15 |
Family
ID=24190606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1716667A Expired GB1188182A (en) | 1966-05-10 | 1967-04-14 | Hydrophilic Silica Sol |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1188182A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100411982C (en) * | 2006-04-07 | 2008-08-20 | 北京国瑞升科技有限公司 | Preparation method of large grain size nanometer grade silicon dioxide colloid |
-
1967
- 1967-04-14 GB GB1716667A patent/GB1188182A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100411982C (en) * | 2006-04-07 | 2008-08-20 | 北京国瑞升科技有限公司 | Preparation method of large grain size nanometer grade silicon dioxide colloid |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| CSNS | Application of which complete specification have been accepted and published, but patent is not sealed |