GB818095A - Process for the production of readily dispersible silicic acid fillers - Google Patents
Process for the production of readily dispersible silicic acid fillersInfo
- Publication number
- GB818095A GB818095A GB2968156A GB2968156A GB818095A GB 818095 A GB818095 A GB 818095A GB 2968156 A GB2968156 A GB 2968156A GB 2968156 A GB2968156 A GB 2968156A GB 818095 A GB818095 A GB 818095A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- vessel
- precipitation vessel
- alkali
- precipitation
- 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
- 235000012239 silicon dioxide Nutrition 0.000 title abstract 4
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 title abstract 3
- 239000000945 filler Substances 0.000 title abstract 2
- 238000001556 precipitation Methods 0.000 abstract 7
- 239000002253 acid Substances 0.000 abstract 4
- 239000011541 reaction mixture Substances 0.000 abstract 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 229910000272 alkali metal oxide Inorganic materials 0.000 abstract 2
- 229910052910 alkali metal silicate Inorganic materials 0.000 abstract 2
- 239000002245 particle Substances 0.000 abstract 2
- 238000005086 pumping Methods 0.000 abstract 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract 1
- 150000007513 acids Chemical class 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 239000000839 emulsion Substances 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 abstract 1
- 239000003973 paint Substances 0.000 abstract 1
- 239000012763 reinforcing filler Substances 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- 238000010008 shearing Methods 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 239000012463 white pigment Substances 0.000 abstract 1
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
- C01B33/18—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
- C01B33/187—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof by acidic treatment of silicates
- C01B33/193—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof by acidic treatment of silicates of aqueous solutions of silicates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Silicon Compounds (AREA)
Abstract
<PICT:0818095/III/1> Well-dispersible silicic acid fillers having a particularly uniform particle size are obtained by reacting alkali-metal silicate solutions with acids or acid-reacting substances with intensive mixing under the action of the high shearing forces, in a precipitation vessel which is small compared with the total quantity of the reaction mixture. The reaction mixture, which is stored in a larger vessel, is continuously circulated through the precipitation vessel by pumping for the duration of the reaction. The rates of pumping and addition of acid are such that the difference in alkali-metal oxide contents of the solution entering and leaving the precipitation vessel is less than 10 per cent, and preferably less than 3 per cent, referred to the alkali-metal oxide content of the starting solution; the whole volume of the solution is circulated through the precipitation vessel at least ten times before the precipitation of the silicic acid is complete. The ratio of the volume of the precipitation vessel to that of the reaction mixture lies between 1 to 2 and 1 to 100, preferably between 1 to 4 and 1 to 20. In the preferred embodiment (Fig. 2), the mixing is carried out in the precipitation vessel i by means of a Kotthof mixing mill, consisting of rotors working within a stator d supported by rods b and an acid feedline h. The alkali metal silicate solution, with a Na2O : SiO2 ratio of 1 : 3.3, and which may contain a neutral salt, is pumped at 7 DEG C. from the storage vat k by pump l through the vessel i, and then overflows through m back to k. The acid, e.g. 3N hydrochloric acid, is preferably introduced at constant rate, via line h which ends just above the rotor of the mixing mill. Depending upon the size of the particles, the product may be used for rubber reinforcing fillers, e.g. 12-35 millimicrons, as a white pigment in, for example, size and short oil emulsion paints, e.g. 25-200 millimicrons, and especially paper.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB818095A true GB818095A (en) | 1959-08-12 |
Family
ID=1741709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2968156A Expired GB818095A (en) | 1956-09-28 | Process for the production of readily dispersible silicic acid fillers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB818095A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2007141A1 (en) * | 1968-04-27 | 1970-01-02 | Degussa | |
| US4001379A (en) * | 1968-04-27 | 1977-01-04 | Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler | Process of making superfine amorphous high structural silicic acid |
| EP0003217A1 (en) * | 1978-01-30 | 1979-08-08 | Degussa Aktiengesellschaft | Precipitated silica granulates, their preparation and their use |
| CN115784245A (en) * | 2022-12-29 | 2023-03-14 | 苏州西丽卡电子材料有限公司 | Preparation method of hydrophobic high-purity micron-sized spherical silicon dioxide powder |
-
1956
- 1956-09-28 GB GB2968156A patent/GB818095A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2007141A1 (en) * | 1968-04-27 | 1970-01-02 | Degussa | |
| US4001379A (en) * | 1968-04-27 | 1977-01-04 | Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler | Process of making superfine amorphous high structural silicic acid |
| EP0003217A1 (en) * | 1978-01-30 | 1979-08-08 | Degussa Aktiengesellschaft | Precipitated silica granulates, their preparation and their use |
| CN115784245A (en) * | 2022-12-29 | 2023-03-14 | 苏州西丽卡电子材料有限公司 | Preparation method of hydrophobic high-purity micron-sized spherical silicon dioxide powder |
| CN115784245B (en) * | 2022-12-29 | 2024-01-16 | 苏州西丽卡电子材料有限公司 | Preparation method of hydrophobic high-purity micron-sized spherical silicon dioxide powder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3533816A (en) | Preparation of high ratio alkali metal silicates | |
| US3745126A (en) | Stable positively charged alumina coated silica sols | |
| GB818095A (en) | Process for the production of readily dispersible silicic acid fillers | |
| US2863727A (en) | Treatment of silica | |
| USRE24324E (en) | Method of making stable cupric | |
| US3337299A (en) | Silica pigments and process for producing same | |
| US2386247A (en) | Preparation of sols | |
| EP0401624B1 (en) | Process for preparing yellow iron oxide pigments | |
| US2524358A (en) | Preparing colloidal silica solutions | |
| DE2151232A1 (en) | PROCESS FOR MANUFACTURING A WATER BASED PRODUCT ON MIXED SILICATES | |
| US3489516A (en) | Art of making silica particles | |
| DE2313116C2 (en) | Process for the production of alkali hyperoxide | |
| GB1597325A (en) | Stable chloride process anatase slurries | |
| JP3479676B2 (en) | Method for continuous production of synthetic swellable silicate | |
| US1672768A (en) | Method of making gels | |
| DE60217251T2 (en) | Improved process for the preparation of lithium borohydride | |
| Pacsu | Cellulose Studies: II. Estimation of Aldehyde Groups in Oxycellulose by the Hypoiodite Method | |
| DE971180C (en) | Process for cleaning water | |
| US3579361A (en) | Viscous liquid material and process for making same | |
| McCrea | Light intensity measurement by means of hydriodic acid | |
| US3402995A (en) | Method of preparing alkali metal iodides | |
| CA1152287A (en) | Continuous process for making calcium hypochlorite | |
| US1493708A (en) | Water glass and its process of production | |
| US2017125A (en) | Zirconium, silicon alkali acid solution and method for stabilizing same | |
| GB709465A (en) | Improvements in or relating to the production of silica hydrosols |