BE370074A - - Google Patents
Info
- Publication number
- BE370074A BE370074A BE370074DA BE370074A BE 370074 A BE370074 A BE 370074A BE 370074D A BE370074D A BE 370074DA BE 370074 A BE370074 A BE 370074A
- Authority
- BE
- Belgium
- Prior art keywords
- lead
- phosphoric acid
- phosphate
- acid
- salt
- Prior art date
Links
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 33
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 16
- HUTDDBSSHVOYJR-UHFFFAOYSA-H bis[(2-oxo-1,3,2$l^{5},4$l^{2}-dioxaphosphaplumbetan-2-yl)oxy]lead Chemical compound [Pb+2].[Pb+2].[Pb+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O HUTDDBSSHVOYJR-UHFFFAOYSA-H 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 6
- 229910019142 PO4 Inorganic materials 0.000 claims description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 4
- 239000010452 phosphate Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims 1
- 235000011007 phosphoric acid Nutrition 0.000 description 14
- 235000021317 phosphate Nutrition 0.000 description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- HWSZZLVAJGOAAY-UHFFFAOYSA-L lead(II) chloride Chemical compound Cl[Pb]Cl HWSZZLVAJGOAAY-UHFFFAOYSA-L 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 2
- 239000001506 calcium phosphate Substances 0.000 description 2
- RCJVRSBWZCNNQT-UHFFFAOYSA-N dichloridooxygen Chemical compound ClOCl RCJVRSBWZCNNQT-UHFFFAOYSA-N 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 2
- 229940078499 tricalcium phosphate Drugs 0.000 description 2
- 229910000391 tricalcium phosphate Inorganic materials 0.000 description 2
- 235000019731 tricalcium phosphate Nutrition 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/185—Preparation neither from elemental phosphorus or phosphoric anhydride nor by reacting phosphate-containing material with an acid, e.g. by reacting phosphate-containing material with an ion-exchange resin or an acid salt used alone
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
<Desc/Clms Page number 1>
"Procédé de fabrication d'acide phosphorique".
La présente invention concerne un procédé de fabrication'd'acide phosphorique en vue de l'obtention d'acide phophrique concentré.
Dans ce but, l'invention prévoit d'obérer la séparation de l'acide phosphorique hors d'une solution saline au moyen d'un sel de plomb soluble, ou au moyen d' un sel basique de plomb tei que ar exemple de l'oxychlo- rure, de l' hydrate ou du carbonate ae plomb,
L'acide phosphorique dans la solution saline peut se trouver soit à l'état d'acide libre H3PO4 ou à l'état de phosphate soluble.
Il en résulte que l'acide phosphorique est pré- cipité à l'état de phosphate de plomb.
Suivant une particularité de l'invention, le phosphate de plomb est ensuite transformé en acide phos- phorique par l'action d'acide chlorhydrique et le sel de plomb de départ est régénéré à partir du chlorure de plomb fermé, pour retourner en cycle. Le peu de chlorure
<Desc/Clms Page number 2>
de plomb solubilisé par l'acide phosphorique est élimine par un moyen connu, par exemplede l'acide sulfurique, de @ zizi l'acide sulfhydrique eto.
L'exemple qui suit s'applique au cas où l'atta- que de phosphate tricalcique naturel se fait au moyen d'acide nitrique,en quantité suffisante pour transformer tout le phosphate en acide libre.
Exemple :Du phosphate tricalcique naturel est traité par de 1'..acide nitrique et l'on obtient une solution de nitra-
EMI2.1
te de oalolun contenant de l'acide phosphorique libre. (po4)2 ca3 + 6 Jj03H 3 ca(N03)2 + 2 H3po4............ 1).
La solution acide de nitrate de calcium ainsi ob- tenue est traitée par un sel de plomb basique par exemple par de l'oxychlorure et tout l'acide phosphorique est pré- cipité à l'état de phosphate de ylomb aisément séparé de la solution de nitrate de chaux par simple filtration.
L'on peut, si on le désire, d'abord éliminer les impuretés telles que fer et alumine qui accompagnent tou- jours les phosphates naturels.
EMI2.2
Le précipité formé contient donc du chlorure et du phosphate de plomb.
En essorant ce précipité et en le traitant par de l'acide chlorhydrique concentré, l'on obtiendra de l'acide phosphorique et un précipite de chlorure de plomb suivant la réaction :
EMI2.3
3 Pb C12 + Pb3(P0)2 + 6 HC1 = 2 Hij4 + 6 PbC12 .... (3)
Comme dit plus haut, lepeu de ohlorure de plomb soluble dans l'acide phosphorique ,eut être eliminé, par un moyen commun.
<Desc/Clms Page number 3>
Le chlorure de plomb obtenu ne doit pas donner lieu à an lavage poussé en vue d'en extraire toat l'acide phosphorique, étant dorme que suivent une particularité de l'invention, ce chlorure est destiné à à être régénéré par l'action d'une base quelconque pour rentrer '-- nouveau en cycle. A cet effet, on peut par exemple employer de la chaux.
EMI3.1
Or, ce s-ont précis ornent ces lavages qui, en pratique, dilaent l'acide obtenu, ce qui nécessite ane concentration ultérieure très onéreuse et de maavsis ren- de ment .
D'autres modifications peuvent encore être apportées aa procédé décrit sans poar cela sortir de la portée du présent brevet.
REVENDICATIONS
1) Procédé de fabrication d'acide phosphori- que caractériséen ce qu'on emploie en cycle fermé an sel de plomb basique poar isoler l'acide phosphorique à l'état de phosphate de plomb et au sein d'une solation saline.
<Desc / Clms Page number 1>
"Process for the manufacture of phosphoric acid".
The present invention relates to a process for the manufacture of phosphoric acid with a view to obtaining concentrated phophric acid.
To this end, the invention provides for obstructing the separation of phosphoric acid from a saline solution by means of a soluble lead salt, or by means of a basic salt of lead such as, for example, lead oxychloride, hydrate or carbonate,
Phosphoric acid in saline can be found either as free acid H3PO4 or as soluble phosphate.
As a result, the phosphoric acid is precipitated in the form of lead phosphate.
According to a particular feature of the invention, the lead phosphate is then converted into phosphoric acid by the action of hydrochloric acid and the starting lead salt is regenerated from the closed lead chloride, to return to the cycle. The little chloride
<Desc / Clms Page number 2>
lead solubilized with phosphoric acid is removed by known means, for example sulfuric acid, @ zizi hydrogen sulfide eto.
The following example applies to the case where the attack of natural tricalcium phosphate is carried out by means of nitric acid, in an amount sufficient to convert all the phosphate into free acid.
Example: Natural tricalcium phosphate is treated with 1 '.. nitric acid and a solution of nitric acid is obtained.
EMI2.1
te of oalolun containing free phosphoric acid. (po4) 2 ca3 + 6 Jj03H 3 ca (N03) 2 + 2 H3po4 ............ 1).
The acidic solution of calcium nitrate thus obtained is treated with a basic lead salt, for example with oxychloride, and all the phosphoric acid is precipitated in the form of ylomb phosphate which is easily separated from the solution of. nitrate of lime by simple filtration.
If desired, it is possible to first remove impurities such as iron and alumina which always accompany natural phosphates.
EMI2.2
The precipitate formed therefore contains chloride and lead phosphate.
By draining this precipitate and treating it with concentrated hydrochloric acid, phosphoric acid and a precipitate of lead chloride will be obtained according to the reaction:
EMI2.3
3 Pb C12 + Pb3 (P0) 2 + 6 HC1 = 2 Hij4 + 6 PbC12 .... (3)
As said above, the little lead ohloride soluble in phosphoric acid could be eliminated by common means.
<Desc / Clms Page number 3>
The lead chloride obtained must not give rise to a thorough washing with a view to extracting therefrom toat phosphoric acid, being as follows a feature of the invention, this chloride is intended to be regenerated by the action of 'any base to enter' - new to cycle. For this purpose, for example, lime can be used.
EMI3.1
However, these specifics adorn these washes which, in practice, dilate the acid obtained, which requires a very expensive subsequent concentration and very high yield.
Still other modifications can be made to the process described without departing from the scope of the present patent.
CLAIMS
1) Process for the manufacture of phosphori-ic acid characterized in that a basic lead salt is used in a closed cycle to isolate phosphoric acid in the form of lead phosphate and in a saline solation.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE370074A true BE370074A (en) |
Family
ID=41604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE370074D BE370074A (en) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE370074A (en) |
-
0
- BE BE370074D patent/BE370074A/fr unknown
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