CS274153B1 - Method of ammonium phosphates defluorination - Google Patents
Method of ammonium phosphates defluorination Download PDFInfo
- Publication number
- CS274153B1 CS274153B1 CS345486A CS345486A CS274153B1 CS 274153 B1 CS274153 B1 CS 274153B1 CS 345486 A CS345486 A CS 345486A CS 345486 A CS345486 A CS 345486A CS 274153 B1 CS274153 B1 CS 274153B1
- Authority
- CS
- Czechoslovakia
- Prior art keywords
- defluorination
- phosphate salt
- ammonium phosphate
- mixture
- ammonium
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000006115 defluorination reaction Methods 0.000 title claims abstract description 14
- ZRIUUUJAJJNDSS-UHFFFAOYSA-N ammonium phosphates Chemical class [NH4+].[NH4+].[NH4+].[O-]P([O-])([O-])=O ZRIUUUJAJJNDSS-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 239000004254 Ammonium phosphate Substances 0.000 title claims 2
- 235000019289 ammonium phosphates Nutrition 0.000 title claims 2
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- QVLTXCYWHPZMCA-UHFFFAOYSA-N po4-po4 Chemical compound OP(O)(O)=O.OP(O)(O)=O QVLTXCYWHPZMCA-UHFFFAOYSA-N 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 claims description 2
- -1 fluoride ions Chemical class 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 239000012265 solid product Substances 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- 229910052731 fluorine Inorganic materials 0.000 abstract description 8
- 239000011737 fluorine Substances 0.000 abstract description 8
- 150000001875 compounds Chemical class 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 abstract 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 7
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 2
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 235000019837 monoammonium phosphate Nutrition 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
Landscapes
- Removal Of Specific Substances (AREA)
- Fertilizers (AREA)
Abstract
Description
Vynález se týká způsobu defluorace amonných solí vyrobených z extrakční kyseliny trihydrogenfosforečné.The present invention relates to a process for defluorination of ammonium salts made from phosphoric acid phosphoric acid.
Nejčastější způsoby defluorace těchto solí spočívají v rekrystalizaci nebo v převedení vodorozpustných solí obsahujících fluor na málo rozpustné sloučeniny a jejich odstranění filtrací.The most common defluorination methods for these salts are by recrystallization or by converting the water-soluble fluorine-containing salts to sparingly soluble compounds and removing them by filtration.
Nedostatek dosud používaných způsobu defluorace spočívá především v tom, že při rekrystalizaci není snížení obsahu fluoru pro některé· účely zpravidla dostatečné. Kromě toho dochází rovněž ke značným ztrátám požadovaného produktu v matečném louhu. Způsoby založené na převedení vodorozpustných sloučenin obsahujících fluor na málo rozpustné jsou technologicky složitější z hlediska komplexního využití suroviny.The deficiency of the defluorination methods used hitherto lies mainly in the fact that, in recrystallization, the reduction of the fluorine content is generally not sufficient for some purposes. In addition, there is also considerable loss of the desired product in the mother liquor. Processes based on converting water-soluble fluorine-containing compounds to sparingly soluble are technologically more complex in terms of complex feedstock utilization.
Tyto nevýhody řeší podle vynálezu způsob defluorace amonných solí vyrobených z extrakční kyseliny trihydrogenfosforečné, jehož podstata spočívá v tom, že se amonná fosforečná sůl něho jejich libovolná směs, případně s obsahem vlhkosti do 20 % hmot., zahřeje nejméně na 60 °C, čímž se sníží obsah fluorových těkavých sloučenin.According to the invention, these deficiencies are solved by a process for defluorination of ammonium salts made from phosphoric acid phosphoric acid, which comprises heating the ammonium phosphate salt of any mixture thereof, optionally with a moisture content of up to 20% by weight, to at least 60 ° C. reduces the content of fluorine volatile compounds.
Podle dalšího význaku vynálezu se amonná fosforečná sůl nebo jejich libovolná směs před nebo/a během zahřívání mele.According to a further feature of the invention, the ammonium phosphate salt or any mixture thereof is ground before and / or during heating.
Podle dalšího význaku vynálezu se defluorace provádí při převádění roztoku nebo suspenze amonné fosforečné soli nebo jejich libovolné směsi na pevný produkt.According to another aspect of the invention, the defluorination is carried out by converting a solution or suspension of the ammonium phosphate salt or any mixture thereof to a solid product.
Podle dalšího význaku vynálezu se část fluoridových ionů odstraní pomocí vápenaté nebo/a horečnaté nebo/a vápenatohořečnaté suroviny a část zahřátím nejméně na 60 °C.According to a further feature of the invention, part of the fluoride ions is removed by means of calcium and / or magnesium and / or calcium-magnesium feedstock and part by heating to at least 60 ° C.
Základní účinek spůsobu defluorace podle vynálezu spočívá v tom, že snížení obsahu fluoru se dosahuje velmi jednoduchým postupem. Kromě toho se veškerý fosfor ve výchozí surovině zužitkuje na výrobu žádaného produktu. Tím se způsob defluorace podle vynálezu stává oproti dosud známým způsobům ekonomicky výhodnějším.The basic effect of the defluorination process according to the invention is that the reduction of the fluorine content is achieved by a very simple process. In addition, all of the phosphorus in the feedstock is utilized to produce the desired product. As a result, the defluorination process according to the invention becomes economically more advantageous than the hitherto known methods.
Defluorace může být kontinuální, diskontinuální, nebo kombinace obou těchto postupů. Postupuje se například tak, že nasycený roztok dihydrogenfosforečnanu amonného se vysuší a dále zahřátím na 150 °C defluoruje.Defluorination can be continuous, discontinuous, or a combination of both. For example, a saturated solution of ammonium dihydrogen phosphate is dried and further defluorated by heating to 150 ° C.
Způsob defluorace podle vynálezu je dále blíže popsán na konkrétním příkladu provedení.The defluorination method of the invention is described in more detail below with reference to a specific embodiment.
PříkladExample
Roztok dihydrogenfosforečnanu amonného o koncentraci 30 % hmot. byl při teplotě bodu varu vysušen a dále zahříván při 150 °C. Obsah fluoru z původních 1,4 % hmot. byl snížen pod 0,1 % hmot.30% w / w ammonium dihydrogen phosphate solution was dried at boiling point and further heated at 150 ° C. The fluorine content of the original 1.4 wt. was reduced below 0.1 wt.
Způsob defluorace je vhodný k přípravě amonných fosforečných solí se sníženým obsahem fluoru.The defluorination process is suitable for the preparation of fluorine-reduced ammonium phosphate salts.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS345486A CS274153B1 (en) | 1986-05-13 | 1986-05-13 | Method of ammonium phosphates defluorination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS345486A CS274153B1 (en) | 1986-05-13 | 1986-05-13 | Method of ammonium phosphates defluorination |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CS345486A1 CS345486A1 (en) | 1990-09-12 |
| CS274153B1 true CS274153B1 (en) | 1991-04-11 |
Family
ID=5374656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS345486A CS274153B1 (en) | 1986-05-13 | 1986-05-13 | Method of ammonium phosphates defluorination |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS274153B1 (en) |
-
1986
- 1986-05-13 CS CS345486A patent/CS274153B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CS345486A1 (en) | 1990-09-12 |
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