DE539641C - Production of high percentage phosphoric acid or high percentage phosphate solutions - Google Patents
Production of high percentage phosphoric acid or high percentage phosphate solutionsInfo
- Publication number
- DE539641C DE539641C DE1930539641D DE539641DD DE539641C DE 539641 C DE539641 C DE 539641C DE 1930539641 D DE1930539641 D DE 1930539641D DE 539641D D DE539641D D DE 539641DD DE 539641 C DE539641 C DE 539641C
- Authority
- DE
- Germany
- Prior art keywords
- high percentage
- acid
- phosphoric acid
- production
- phosphate solutions
- 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
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Herstellung hochprozentiger Phosphorsäure oder hochprozentiger Phosphatlösungen Es ist bekannt, daß beim Aufschließen von Rohphosphat mit Schwefelsäure oder solche enthaltenden Lösungen der Gips sich nur unter besonderen Schwierigkeiten durch Dekantieren, Filtrieren oder Zentrifugieren von der entstandenen Phosphorsäure oder Phosphatlösung trennen läßt. Insbesondere ist es notwendig, zum Zwecke der Abscheidung des Gipses entweder mit geringen Konzentrationen zu arbeiten oder aber das Reaktionsgemisch mit Wasser zu verdünnen. Das Resultat sind verhältnismäßig dünne Phosphorsäure- oder Phosphatlösungen, deren Eindampfung Kosten und Arbeit verursacht. Ähnliche Schwierigkeiten treten auch beim Auswaschen des Gipsbreies auf.Production of high percentage phosphoric acid or high percentage phosphate solutions It is known that when digesting rock phosphate with sulfuric acid or such solutions containing gypsum can only be obtained with particular difficulty by decanting, Filtration or centrifugation of the resulting phosphoric acid or phosphate solution lets separate. In particular, it is necessary for the purpose of separating the plaster either to work with low concentrations or the reaction mixture to be diluted with water. The result is relatively thin phosphoric acid or phosphate solutions, the evaporation of which causes costs and labor. Similar Difficulties also arise when washing out the gypsum paste.
Diese Schwierigkeiten lassen sich vermeiden, wenn man den zum Aufschließen dienenden Lösungen geringe Mengen von Derivaten der Naphthalinsulfosäure oder deren Salze zusetzt.These difficulties can be avoided if you have to unlock it Serving solutions small amounts of derivatives of naphthalene sulfonic acid or their Adds salts.
Dadurch wird erreicht, daß der Gips sich schnell zu Boden setzt und durch seine Beschaffenheit ein leichtes Dekantieren, Filtrieren und Auswaschen gestattet. Ferner ist es möglich, in verhältnismäßig hohen Konzentrationen zu arbeiten und das Verdünnen des Reaktionsgemisches zu vermeiden. Der Erfolg ist die Gewinnung von relativ starken Phosphorsäuren oder Phosphatlösungen, ein schnellerer Arbeitsprozeß und die Einsparung von Eindampfungskosten.This ensures that the plaster quickly settles on the ground and its nature allows easy decanting, filtering and washing out. It is also possible to work in relatively high concentrations and avoid diluting the reaction mixture. Success is acquisition of relatively strong phosphoric acids or phosphate solutions, a faster work process and the saving of evaporation costs.
Beispiel i 56o ccm der zum Aufschluß dienenden Säure (mit 200 g H3 P04 und i5o g H. SO, von 6o-B@ im Liter) werden auf etwa 55' erwärmt. Man fügt dazu 25 ccm einer io° "igen Lösung von Z-Dinaphthalinsulfosäure und trägt unter Umrühren Zoo 7 fein gemahlenes, weicherdiges Rohphosphat mit einem Gehalt von -/5 "" Tricalciumphosphat ein. \ach Vollendung der Reaktion trennt sich der gebildete Gips in sehr kurzer Zeit durch Absitzen von der Phosphorsäure.Example 1.560 cc of the acid used for the digestion (with 200 g H3 PO4 and 150 g H. SO, from 60B @ per liter) are heated to about 55 minutes. 25 cc of a 10% solution of Z-dinaphthalenesulfonic acid are added and, while stirring, Zoo 7 finely ground, soft-earthed rock phosphate with a content of - / 5 "" tricalcium phosphate is added. After the reaction has been completed, the gypsum formed separates into much short time by settling from the phosphoric acid.
Beispiel = 456 ccm Aufschlußsäure (von der oben be-Schriebenen Zusammensetzung] werden nach Erwärmung auf 55' mit io ccm einer io° "igen Lösung von isopropyhiaphthalinsulfosaurem \a versetzt. Hierauf trägt man Zoo g fein gemahlenes, weicherdiges Rohphosphat mit einem Gehalt von etwa 6o" "Tric;dciiimpliospha.t ein und verfährt wie oben.Example = 456 ccm of digestion acid (of the composition described above) are mixed with 10 ccm of a 10% solution of isopropyhiaphthalenesulfonic acid after heating to 55 '. This is followed by zoo g of finely ground, soft-earthed rock phosphate with a content of about 6o ""Tric; dciiimpliospha.t and proceed as above.
Beispiel ii.l ccm Aufschlußsäure (von der oben be-_chtiebenen Zu>ammensetzun;t werden nach Erwärmung auf 553 mit io ccm einer 1j° -Oigen Usun- des Na-Salzes der n-ButylnaphthalinsulfL)süure versetzt, 2o Q Phosphat eingetra;en und wie oben verfahren.Example ii. 1 cc of digesting acid (from the above-mentioned supplementary measure; t become after heating to 553 with 10 ccm of a 1% usund of the Na salt Add n-butylnaphthalenesulfl) acid, add 2o Q phosphate and proceed as above.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE539641T | 1930-04-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE539641C true DE539641C (en) | 1931-11-30 |
Family
ID=6558635
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1930539641D Expired DE539641C (en) | 1930-04-12 | 1930-04-12 | Production of high percentage phosphoric acid or high percentage phosphate solutions |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE539641C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE740878C (en) * | 1938-12-20 | 1943-10-29 | Metallgesellschaft Ag | Production of phosphoric acid by digesting phosphates with sulfuric acid |
US4049774A (en) * | 1970-11-12 | 1977-09-20 | Fisons Limited | Process for reducing formation of gypsum scale durng the washing of calcium sulphate hemihydrate crystals |
-
1930
- 1930-04-12 DE DE1930539641D patent/DE539641C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE740878C (en) * | 1938-12-20 | 1943-10-29 | Metallgesellschaft Ag | Production of phosphoric acid by digesting phosphates with sulfuric acid |
US4049774A (en) * | 1970-11-12 | 1977-09-20 | Fisons Limited | Process for reducing formation of gypsum scale durng the washing of calcium sulphate hemihydrate crystals |
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