GB1201579A - Process for preparing sodium fluoisilicate - Google Patents
Process for preparing sodium fluoisilicateInfo
- Publication number
- GB1201579A GB1201579A GB5659068A GB5659068A GB1201579A GB 1201579 A GB1201579 A GB 1201579A GB 5659068 A GB5659068 A GB 5659068A GB 5659068 A GB5659068 A GB 5659068A GB 1201579 A GB1201579 A GB 1201579A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phosphate
- solution
- silicate
- fluoride
- sodium fluosilicate
- 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
- C01B33/08—Compounds containing halogen
- C01B33/10—Compounds containing silicon, fluorine, and other elements
- C01B33/103—Fluosilicic acid; Salts thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
1,201,579. Sodium fluosilicate. SOC. ITALIANA RESINE S.p.A. 28 Nov., 1968 [29 Nov., 1967], No. 56590/68. Heading C1A. Sodium fluosilicate is prepared by treating fluoride- and silicate-bearing mineral phosphate with excess sulphuric acid in solution, removing excess sulphate, precipitating the sodium fluosilicate from the resulting phosphate-, silicate- and fluoride-containing solution by addition of sodium mono- or polyphosphates or mixtures thereof. The sodium fluosilicate is preferably precipitated in at least 98% purity and the remaining phosphate solution preferably contains no more than 1 g./l. F- and 0.5 g./l. silicate (as SiO 2 ). The solution to which phosphate is added may contain 200-450 g./l. phosphate (as P 2 O 5 ), up to 35 g./l. fluoride (as F-) and up to 18 g./l. silicate (as SiO 2 ). The addition of phosphate may be such that the Na: F molar ratio is between 1 : 1 and 2À5 : 1. The crystals obtained can be separated from the solution by filtering, temperatures for precipitation and filtering being between 40‹ and 100‹ C.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT815721 | 1967-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1201579A true GB1201579A (en) | 1970-08-12 |
Family
ID=11125977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5659068A Expired GB1201579A (en) | 1967-11-29 | 1968-11-28 | Process for preparing sodium fluoisilicate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1201579A (en) |
-
1968
- 1968-11-28 GB GB5659068A patent/GB1201579A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1145022A (en) | Process for obtaining fluorine compounds from digestion solutions of crude phosphates with nitric acid or hydrochloric acid | |
| US2987376A (en) | Method for defluorination of phosphoric acid | |
| GB1213588A (en) | A process for the production of stable silicate solutions | |
| GB467843A (en) | Method of separating fluorine and aluminium from solutions obtained by treatment of raw phosphate with acids | |
| GB1150764A (en) | A process for the production of Sodium Aluminium Silicate Pigments | |
| GB1188584A (en) | Process for the preparation of Synthetic Zeolite Molecular Sieves | |
| US3506394A (en) | Method for producing sodium silicofluoride from wet process phosphoric acid | |
| GB1201579A (en) | Process for preparing sodium fluoisilicate | |
| GB1419393A (en) | Treatment of potassium silico fluoride to produce metal fluorides | |
| GB1414685A (en) | Production of soluble alkali metal silicates | |
| GB1024924A (en) | Process for the removal of impurities from wet process phosphoric acid | |
| GB643510A (en) | Process for the preparation of artificial cryolite substantially free from silica | |
| GB1263310A (en) | The preparation of very pure cryolite | |
| GB1377979A (en) | Fluoridecontaining composition process for its preparation and method of fluorinating drinking water | |
| GB1248037A (en) | Calcium sulphate | |
| US3800029A (en) | Process for recovering sodium fluosilicate from wet process phosphoric acid | |
| US1858203A (en) | Purification of phosphoric acid | |
| US3915659A (en) | Purification of sodium silicofluoride by slurrying with NaCl containing brine | |
| GB271816A (en) | An improved process for working up fluorides containing silicic acid | |
| GB1155957A (en) | Phosphoric Acid Purification Process. | |
| GB1019331A (en) | Production of sodium trimetaphosphate and mixtures containing the same | |
| GB554153A (en) | Improvements in or relating to the production of sodium aluminium fluorides | |
| GB1220323A (en) | Process for purifying aqueous phosphoric acid solutions | |
| GB1152203A (en) | Improvements in or relating to the manufacture of Synthetic Crystalline Mordenite | |
| DE427651C (en) | Process for the preparation of sodium silicofluoric acid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 435 | Patent endorsed 'licences of right' on the date specified (sect. 35/1949) | ||
| PCNP | Patent ceased through non-payment of renewal fee |