NO160667B - BROWN HEAD PLATFORM OF THE GRAVITION TYPE. - Google Patents
BROWN HEAD PLATFORM OF THE GRAVITION TYPE. Download PDFInfo
- Publication number
- NO160667B NO160667B NO842524A NO842524A NO160667B NO 160667 B NO160667 B NO 160667B NO 842524 A NO842524 A NO 842524A NO 842524 A NO842524 A NO 842524A NO 160667 B NO160667 B NO 160667B
- Authority
- NO
- Norway
- Prior art keywords
- phosphoric acid
- silicate
- fluorine
- added
- accordance
- Prior art date
Links
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 37
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 15
- 229910052731 fluorine Inorganic materials 0.000 claims description 10
- 239000011737 fluorine Substances 0.000 claims description 10
- 150000002222 fluorine compounds Chemical class 0.000 claims description 7
- 239000000454 talc Substances 0.000 claims description 6
- 229910052623 talc Inorganic materials 0.000 claims description 6
- 150000004760 silicates Chemical class 0.000 claims description 5
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims description 3
- IJKVHSBPTUYDLN-UHFFFAOYSA-N dihydroxy(oxo)silane Chemical compound O[Si](O)=O IJKVHSBPTUYDLN-UHFFFAOYSA-N 0.000 claims 2
- FSBVERYRVPGNGG-UHFFFAOYSA-N dimagnesium dioxido-bis[[oxido(oxo)silyl]oxy]silane hydrate Chemical group O.[Mg+2].[Mg+2].[O-][Si](=O)O[Si]([O-])([O-])O[Si]([O-])=O FSBVERYRVPGNGG-UHFFFAOYSA-N 0.000 claims 2
- 239000000391 magnesium silicate Substances 0.000 claims 2
- 229910052919 magnesium silicate Inorganic materials 0.000 claims 2
- 235000019792 magnesium silicate Nutrition 0.000 claims 2
- 150000003377 silicon compounds Chemical class 0.000 claims 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims 1
- 239000000654 additive Substances 0.000 claims 1
- 230000000996 additive effect Effects 0.000 claims 1
- 238000000354 decomposition reaction Methods 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 229910052914 metal silicate Inorganic materials 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 9
- 239000010440 gypsum Substances 0.000 description 7
- 229910052602 gypsum Inorganic materials 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- 235000019739 Dicalciumphosphate Nutrition 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 2
- 229910001634 calcium fluoride Inorganic materials 0.000 description 2
- 239000001506 calcium phosphate Substances 0.000 description 2
- 238000003776 cleavage reaction Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000006115 defluorination reaction Methods 0.000 description 2
- NEFBYIFKOOEVPA-UHFFFAOYSA-K dicalcium phosphate Chemical compound [Ca+2].[Ca+2].[O-]P([O-])([O-])=O NEFBYIFKOOEVPA-UHFFFAOYSA-K 0.000 description 2
- 229940038472 dicalcium phosphate Drugs 0.000 description 2
- 229910000390 dicalcium phosphate Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 150000003016 phosphoric acids Chemical class 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000007017 scission Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000004113 Sepiolite Substances 0.000 description 1
- 229910004014 SiF4 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- -1 aluminum silicates Chemical class 0.000 description 1
- 235000019730 animal feed additive Nutrition 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 229910001414 potassium ion Inorganic materials 0.000 description 1
- 229910052624 sepiolite Inorganic materials 0.000 description 1
- 235000019355 sepiolite Nutrition 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- KNXVOGGZOFOROK-UHFFFAOYSA-N trimagnesium;dioxido(oxo)silane;hydroxy-oxido-oxosilane Chemical compound [Mg+2].[Mg+2].[Mg+2].O[Si]([O-])=O.O[Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O KNXVOGGZOFOROK-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
- Revetment (AREA)
Description
Fremgangsmåte ?tilcå fjériré^fluofr1 frå'fdsférsyré; Procedure ?to fjériré^fluofr1 from'fdsfériré;
Denne oppfinnelse vedrører , en fremgangsmåte 3til!iå. f j erne "fluor fra' fosforsyré vedropp'vårmmg"samtidig:som én kisélfor-bindélsé 'blir 'tilsatt'. This invention relates to a method 3 to 12. f j erne "fluorine from' phosphoric acid in drops" at the same time: as one silicon binder is "added".
Særlig ved oppkonsentrering av våt fosforsyré med ca. 30 % P205-innhold fra råfosfat, hvor det foruten oppløste kalium-joner og sulfat joner er tilstede oppløst H2SIF6 og HF, vil fluor konsentrasjonen bli for høy i fosforsyren med 55 % P2O5, noe som resulterer i at det dannes kalsiumfluorid.-Foruten- bunnf all*-av~kaliumfluorid-og-gipsvvil også oppløst H2SiF0 være tilstede i den-konsentrerte -fosforsyre.- Especially when concentrating wet phosphoric acid with approx. 30% P205 content from raw phosphate, where, in addition to dissolved potassium ions and sulfate ions, dissolved H2SIF6 and HF are present, the fluorine concentration will be too high in the phosphoric acid with 55% P2O5, which results in the formation of calcium fluoride.-Besides- bottomf all*-of~potassium fluoride-and-gypsum will also dissolved H2SiF0 be present in the-concentrated -phosphoric acid.-
Nærvær av fluor og fluorforbindelser Presence of fluorine and fluorine compounds
er imidlertid ugunstig ut fra et teknisk <:>og økonomisk synspunkt'.' Vedlteknisk 'behand-ling'" åv fosforsyré er det ofte nødvendig å minske fluor-innholdet i form av HF eller fluorforbindelsen i denne fosforsyré til' mi-nimumsverdier .Spette* er særlig nødvendig når"dikalsiumfo'sfat, passende til dyrefor-tilsetning, skal fremstiles av denne fosforsyren. På deh andre siden representerer fluoret et. me'gét viktig 'bi-produkt som kari'omdannes til forskjellige fluorforbindelser. Disse kan brukes som baktericider og ér dessuten egnet 'for andre tekniske an-vendelser.' is, however, unfavorable from a technical <:>and economic point of view'.' In the technical 'treatment' of phosphoric acid, it is often necessary to reduce the fluorine content in the form of HF or the fluorine compound in this phosphoric acid to minimum values. Spette* is particularly necessary when dicalcium phosphate, suitable for animal feed additives, must be produced from this phosphoric acid. On the other hand, fluorine represents a a very important by-product such as kari is converted into various fluorine compounds. These can be used as bactericides and are also suitable 'for other technical applications.'
De tidligere fremgangsmåter for fjernelse av fluor- er imidlertid ugunstige på visse punkter. Det er for eksempel kjent at mån, karr-fjernes H2SiFo-.ved' å* spalte denne forbindelse til HF og SiF4 ved å tilsette aktivt~Si02 0g'å oppvarme--tiM30°-G. Vann-innholdet bør holdes rkonstant ved-denne fremgangsmåte.-Dette er åpenbart en 'kostbar fremgangsmåte f or fjernelse av fluor siden^manvpå». den'ene' side bruker høye-temperaturer, noe sonrpå. grunn av de ster-ke syrene gir en temmelig alvorlig korrosjon i apparaturen, og på den annen side går den tilførte energi tapt, siden den bare brukes til å fordampe vannet, som må tilsettes igjen for å holde vanninnholdet kon-stant. However, the previous methods for removing fluorine are disadvantageous in certain respects. It is known, for example, that H2SiFo is removed by cleaving this compound into HF and SiF4 by adding active SiO2 and heating to 30°C. The water content should be kept constant by this method. This is obviously an 'expensive method for removing fluorine since manvp'. the 'one' side uses high-temperatures, somewhat later. due to the strong acids causes rather serious corrosion in the equipment, and on the other hand, the added energy is lost, since it is only used to evaporate the water, which must be added again to keep the water content constant.
Den-ovenf or- nevnte -f remgangsmåte-til' fjerning og spalting åv"'HSiF6 '•kan' illustre-res -ved-følgende-likning: - The above-mentioned method for removing and splitting HSiF6 can be illustrated by the following equation:
Det er riå'funnet at fluorinnholdet kan senkes på en mindre kostbar måte, idet nesten all fluor og" fluorforbindelser blir fjernet i en flyktig 'form når det ifølge oppfinnelsen blir 'tilsatt en eller flere syntetiske og/eller naturlige silikater av elementer i annen' og/éllér tredje gruppe i det periodiske system som' magnesium- og/eller' aluminium-silikater. Fremgangsmåten utføres fortrinnsvis. ved 60°—80° C, samtidig som en gass' såsom "luft blir ført gjen-nom. It has been found that the fluorine content can be lowered in a less expensive way, since almost all fluorine and fluorine compounds are removed in a volatile form when, according to the invention, one or more synthetic and/or natural silicates of other elements are added. and/or third group in the periodic table such as magnesium and/or aluminum silicates. The method is preferably carried out at 60°-80° C, while a gas such as air is passed through.
Den nye" fremgangsmåte er gunstig ved at der er betydelig, mindre korrosjon i deh anvendte apparatur, samtidig som- detr ved å arbeide langt under kokepunktet ik--ke er nødvendig å erstatte vannet hele ti--den.-jPå~ denne-måten blir-energiomkost-ningene og følgelig selvkostprisen nedskå-ret". The new method is advantageous in that there is significantly less corrosion in the equipment used, and at the same time, by working far below the boiling point, it is not necessary to replace the water throughout the day. the energy costs and consequently the cost price will be cut".
Overraskende nok har man funnet at fluorforbindelsene i gips-bunnfallet fjernes først og deretter H2SiFo oppløst i fosforsyren. På grunn av dette kan gipsen som frigjøres i denne prosess fjernes uten tap av fluorforbindelse, noe som øker ef-fektiviteten av fosfat-spaltingen og be-handlingen av de tilhørende bi-produkter. Surprisingly, it has been found that the fluorine compounds in the gypsum precipitate are removed first and then H2SiFo dissolved in the phosphoric acid. Because of this, the gypsum released in this process can be removed without loss of fluorine compound, which increases the efficiency of the phosphate cleavage and the treatment of the associated by-products.
Det har vist seg å være meget fordel-aktig når et magnesiumsilikat-talkum med partikkelstørrelse under 30 [j. og i en mengde av 10—20 g/l fosforsyré med P2O5-innhold på 800—1000 g P2O5/I blir anvendt. It has been found to be very advantageous when a magnesium silicate talc with a particle size below 30 [j. and in an amount of 10-20 g/l phosphoric acid with a P2O5 content of 800-1000 g P2O5/I is used.
Ifølge en meget foretrukket utførelse av oppfinnelsen tilsettes silikatene etterat fosforsyren er blitt konsentrert til et P2O5-innhold på 55 %. According to a very preferred embodiment of the invention, the silicates are added after the phosphoric acid has been concentrated to a P2O5 content of 55%.
Oppfinnelsen vil nå bli nærmere be-skrevet under henvisning til et utførelses-eksempel, og forskjellige detaljer blir be-skrevet i den etterfølgende beskrivelse. The invention will now be described in more detail with reference to an embodiment, and various details will be described in the following description.
En mengde på 100 kg råfosfat og 108 kg 78 % H2SO4 ble bragt til å reagere i et batteri av reaksjonskar idet man fikk fosforsyré og gips som et resultat av spaltingen. Etter 2 timers spalting ble den opp-ståtte gips fjernet ved hjelp av filterpres-ser fra syren med et P205-innhold på 30 %. An amount of 100 kg of raw phosphate and 108 kg of 78% H 2 SO 4 was reacted in a battery of reaction vessels, obtaining phosphoric acid and gypsum as a result of the cleavage. After 2 hours of splitting, the resulting gypsum was removed by means of a filter press from the acid with a P205 content of 30%.
(Det er også mulig å konsentrere gipsen (It is also possible to concentrate the plaster
ved å dekantere i Dorr-fortykkere.) Den fremstilte fosforsyré (med 30 % P2O5-innhold) inneholdt oppløst H2SiF8 og HF ved siden av kalsium og sulfatjonen. Ved inndampning for å oppkonsentrere fosforsyren til 50—55 %, oppsto det uoppløselig gips og kalsiumfluorid. by decanting in Dorr thickeners.) The phosphoric acid produced (with 30% P2O5 content) contained dissolved H2SiF8 and HF in addition to calcium and the sulfate ion. On evaporation to concentrate the phosphoric acid to 50-55%, insoluble gypsum and calcium fluoride were formed.
Fosforsyren med 900 g/l av P205 ble ført inn i et kar av rustfritt stål som på den nedre side var utstyrt med et ringformet rør med åpninger for gjennomblåsing av luft, hvorpå det ble tilsatt nedmalt talkum med en partikkelstørrelse mindre enn 30 |x. Ved tilsetning av forskjellige meng-der talkum ble de resultatene som er gjen-gitt i tabellen oppnådd. I tabellen er også medtatt et forsøk med aluminiumsilikat. Det er mulig å anvende sepiolitt 3MgO. 4Si02. 5H20 istedenfor den nedmalte talkum 3MgO. 4SiOa. H20, serpentin 3MgO. 2Si02. 2H2O. The phosphoric acid with 900 g/l of P205 was fed into a stainless steel vessel which was equipped on the lower side with an annular tube with openings for blowing air through, whereupon ground talc with a particle size of less than 30 |x was added. By adding different amounts of talc, the results reproduced in the table were obtained. The table also includes an experiment with aluminum silicate. It is possible to use sepiolite 3MgO. 4Si02. 5H20 instead of the ground talc 3MgO. 4SiOa. H20, serpentine 3MgO. 2Si02. 2H2O.
Før tilsetningen av talkum eller alu-miniumsilikatet ble fosforsyren bragt opp på en temperatur på 70° hvoretter denne temperatur ble opprettholdt under defluoriseringen. Etter defluoriseringen ble gips-bunnfallet fjernet ved filtrering og den rensete fosforsyren overført til lagring eller til prosessavdeling for fremstiling av dikalsiumfosfat. Before the addition of the talc or the aluminum silicate, the phosphoric acid was brought up to a temperature of 70°, after which this temperature was maintained during the defluorination. After the defluorination, the gypsum precipitate was removed by filtration and the purified phosphoric acid transferred to storage or to the process department for the production of dicalcium phosphate.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO842524A NO160667C (en) | 1984-06-22 | 1984-06-22 | BROWN HEAD PLATFORM OF THE GRAVITION TYPE. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO842524A NO160667C (en) | 1984-06-22 | 1984-06-22 | BROWN HEAD PLATFORM OF THE GRAVITION TYPE. |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO842524L NO842524L (en) | 1986-01-17 |
| NO160667B true NO160667B (en) | 1989-02-06 |
| NO160667C NO160667C (en) | 1989-05-16 |
Family
ID=19887725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO842524A NO160667C (en) | 1984-06-22 | 1984-06-22 | BROWN HEAD PLATFORM OF THE GRAVITION TYPE. |
Country Status (1)
| Country | Link |
|---|---|
| NO (1) | NO160667C (en) |
-
1984
- 1984-06-22 NO NO842524A patent/NO160667C/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO160667C (en) | 1989-05-16 |
| NO842524L (en) | 1986-01-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2987376A (en) | Method for defluorination of phosphoric acid | |
| US4055626A (en) | Method of producing fluoride-free phosphoric acid | |
| CN104843712A (en) | Industrial fluosilicic acid purification and white carbon black co-production method | |
| US3993733A (en) | Food grade alkali metal phosphates from wet process H3 PO4 | |
| WO2006127301A1 (en) | Processes for producing phosphates | |
| US2780524A (en) | Process for production of substantially phosphate-free ammonium silicofluoride from den gas | |
| EP2118000B1 (en) | Preparation of hydrogen fluoride from calcium fluoride and sulfuric acid | |
| US4160657A (en) | Preparation of monocalcium phosphate and phosphoric acid | |
| NO160498B (en) | SURFACE VESSELS WITH SLING CUTS AND CLOSING DEVICES FOR CONTROL OF FLOAT PROPERTIES. | |
| NO160667B (en) | BROWN HEAD PLATFORM OF THE GRAVITION TYPE. | |
| NO137232B (en) | PROCEDURE FOR THE PREPARATION OF HYDROGEN FLUORIDE | |
| US4060586A (en) | Recovery of fluorides from gypsum | |
| US4191734A (en) | Fluoride-free phosphate reactions | |
| Habashi et al. | The removal of fluorine from wet process phosphoric acid | |
| US4132765A (en) | Recovery of fluoride values | |
| CN104370277A (en) | Method for recycling fluorine from phosphorus-containing fluorine slag and cogenerating calcium superphosphate | |
| JPS5827206B2 (en) | Futsusooganyushinairinsanennoseizohouhou | |
| CA1115483A (en) | Preparation of monocalcium phosphate and phosphoric acid | |
| US4062929A (en) | Production of hydrogen fluoride | |
| US3455650A (en) | Production of hydrogen fluoride | |
| EP0068663B1 (en) | A process and extractant for removing fluorine compounds from aqueous phosphoric acid | |
| US4137063A (en) | Production of potassium polyphosphates from potassium silicofluorides | |
| US3316060A (en) | Recovery of anhydrous hydrogen fluoride from gaseous mixtures | |
| US4175944A (en) | Removal of fluorine during production of fertilizer | |
| US3256061A (en) | Recovery of hydrogen fluoride |