TW200833606A - Process for producing silica sol having elongated shape - Google Patents
Process for producing silica sol having elongated shapeInfo
- Publication number
- TW200833606A TW200833606A TW96103962A TW96103962A TW200833606A TW 200833606 A TW200833606 A TW 200833606A TW 96103962 A TW96103962 A TW 96103962A TW 96103962 A TW96103962 A TW 96103962A TW 200833606 A TW200833606 A TW 200833606A
- Authority
- TW
- Taiwan
- Prior art keywords
- water soluble
- sio2
- silicic acid
- gel solution
- heating
- Prior art date
Links
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 title abstract 6
- 238000000034 method Methods 0.000 title abstract 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 10
- 235000012239 silicon dioxide Nutrition 0.000 abstract 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 6
- 239000000377 silicon dioxide Substances 0.000 abstract 5
- 229910052681 coesite Inorganic materials 0.000 abstract 4
- 229910052906 cristobalite Inorganic materials 0.000 abstract 4
- 229910052682 stishovite Inorganic materials 0.000 abstract 4
- 229910052905 tridymite Inorganic materials 0.000 abstract 4
- 238000010438 heat treatment Methods 0.000 abstract 3
- 239000000203 mixture Substances 0.000 abstract 3
- 159000000007 calcium salts Chemical class 0.000 abstract 2
- 159000000003 magnesium salts Chemical class 0.000 abstract 2
- 150000007530 organic bases Chemical class 0.000 abstract 2
- 229910052783 alkali metal Inorganic materials 0.000 abstract 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 abstract 1
- 150000001340 alkali metals Chemical group 0.000 abstract 1
- 150000001450 anions Chemical class 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 125000005624 silicic acid group Chemical class 0.000 abstract 1
Landscapes
- Silicon Compounds (AREA)
Abstract
This invention provides a process for producing silica sol having elongated shapes, which includes the steps of: (a) adding a solution containing water soluble calcium salts or magnesium salts or their mixtures into a gel solution of active silicic acid, which comprises 1 to 6 mass% SiO2 and has the pH value of 2 to 5. Wherein, the ratio of CaO, MgO or both of CaO and MgO to SiO2 of the active silicic acid is 1500 to 15000ppm; (b) By the conversion of molecular ratio of SiO2/M2O =20 to 200, (SiO2 represents the total amount of the silica components from the active silicic acid and from the water soluble silicic acid; M represents the alkali metal atom or organic base molecule), the equivalent amount of alkali metal hydroxides or water soluble organic bases or their water soluble silicic acids added into the solution obtained in the step (a), and mixed well; (c), heating the mixture obtained in the step (b) at a temperature of 85-200 degree Celcius for 0.5 to 20 hours to produce a gel solution; (d) removing a part of water in the gel solution obtained from the step (c), and removing at least a part of anions in aforementioned solution containing the water soluble calcium salts, magnesium salts or their mixtures; and (e) heating the gel solution obtained in the step (d) at a temperature of 80 to 195 degree Celcius, which is lower than the heating temperature in the step (c), for 0.5 to 20 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW96103962A TW200833606A (en) | 2007-02-02 | 2007-02-02 | Process for producing silica sol having elongated shape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW96103962A TW200833606A (en) | 2007-02-02 | 2007-02-02 | Process for producing silica sol having elongated shape |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| TW200833606A true TW200833606A (en) | 2008-08-16 |
Family
ID=44819210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW96103962A TW200833606A (en) | 2007-02-02 | 2007-02-02 | Process for producing silica sol having elongated shape |
Country Status (1)
| Country | Link |
|---|---|
| TW (1) | TW200833606A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11814295B2 (en) | 2018-02-26 | 2023-11-14 | Nissan Chemical Corporation | Method for producing silica sol having elongated particle shape |
| US11897774B2 (en) | 2018-02-26 | 2024-02-13 | Nissan Chemical Corporation | Method for producing silica sol having elongated particle shape |
-
2007
- 2007-02-02 TW TW96103962A patent/TW200833606A/en unknown
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11814295B2 (en) | 2018-02-26 | 2023-11-14 | Nissan Chemical Corporation | Method for producing silica sol having elongated particle shape |
| US11897774B2 (en) | 2018-02-26 | 2024-02-13 | Nissan Chemical Corporation | Method for producing silica sol having elongated particle shape |
| TWI850216B (en) * | 2018-02-26 | 2024-08-01 | 日商日產化學股份有限公司 | Method for producing silica sol having long and narrow particle form |
| TWI850215B (en) * | 2018-02-26 | 2024-08-01 | 日商日產化學股份有限公司 | Method for producing silica sol having long and narrow particle form |
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