DE445822C - Process for the production of phosphoric acid - Google Patents

Process for the production of phosphoric acid

Info

Publication number
DE445822C
DE445822C DEC35578D DEC0035578D DE445822C DE 445822 C DE445822 C DE 445822C DE C35578 D DEC35578 D DE C35578D DE C0035578 D DEC0035578 D DE C0035578D DE 445822 C DE445822 C DE 445822C
Authority
DE
Germany
Prior art keywords
phosphoric acid
production
phosphorus
pentoxide
absorption
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
Application number
DEC35578D
Other languages
German (de)
Inventor
Dr Hermann Lang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEC35578D priority Critical patent/DE445822C/en
Application granted granted Critical
Publication of DE445822C publication Critical patent/DE445822C/en
Expired legal-status Critical Current

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
    • C01B25/20—Preparation from elemental phosphorus or phosphoric anhydride

Description

Verfahren zur Herstellung von Phosphorsäure. Es wurde die Beobachtung gemacht, daß das Phosphorpentoxyd, das bekanntlich sehr schwer zu verdichtende Nebel bildet, sich in heißem Wasser oder heißer Phosphorsäurelösung beliebiger Konzentration sehr rasch und vollkommen löst.Process for the production of phosphoric acid. It became observation made that the phosphorus pentoxide, which is known to be very difficult to condense fog forms in hot water or hot phosphoric acid solution of any concentration solves very quickly and completely.

Folgende Versuchsanordnung läßt dies anschaulich erkennen: Leitet man bei gewöhnlicher Temperatur ein Gemisch von Phosphorpentoxyd und Luft in ein mit Wasser gefülltes gläsernes zo-Kugel-Rohr, so tritt nur eine sehr unvollkommene Auflösung des Phosphorpentoxyds ein, was man schon daran erkennt, daß die Gasräume der Kugel von weißen Dämpfen erfüllt sind. -Erhitzt man nun die Lösung in dem io-Kugel-Rohr annähernd zum Sieden, so tritt eine so lebhafte Absorption des Phosphorpentoxyds ein, daß die Gasräume der Kugeln sich vollständig aufhellen und durchsichtig werden.The following test arrangement clearly shows this: Conducts a mixture of phosphorus pentoxide and air is put into one at ordinary temperature Glass zo-sphere tube filled with water, only a very imperfect one occurs Dissolution of the phosphorus pentoxide, which can be seen from the fact that the gas spaces the sphere are filled with white vapors. - The solution is now heated in the io-ball tube almost to boiling, there is such a vigorous absorption of the phosphorus pentoxide one that the gas spaces of the balls are completely brightened and transparent.

Bei der Ausführung in technischem Maßstab kann man nun die Verbrennungswärme des Phosphors gleichzeitig zur Erhitzung der Absorptionsräume vorteilhaft benutzen, indem man z. B. die Phosphorflamme in einen mit Füllkörpern ausgesetzten Turm hereinbrennen läßt, der von oben mit Phosphorsäurelösung mittlerer Konzentration beispielsweise von etwa 50 Prozent oder mehr H,P04 berieselt wird. Man kann nun durch passende Einstellung des Säuredurchlaufs erzielen, daß aus dem Turm eine 8o- bis goprozentige Phosphorsäure abläuft, während oben nur Wasserdampf mit geringen Spuren von Phosphorsäure entweicht.When running on an industrial scale, you can now use the heat of combustion of the phosphorus at the same time to heat the absorption spaces advantageously by z. B. can burn the phosphorus flame in a tower exposed with packing, which is sprinkled from above with phosphoric acid solution of medium concentration, for example of about 50 percent or more H, PO4. By adjusting the acid flow appropriately, it is possible to ensure that an 8 to 20 percent phosphoric acid runs off the tower, while only water vapor with small traces of phosphoric acid escapes from the top.

Das Verfahren läßt sich auch auf die elektrothermische Gewinnung von Phosphorsäure unter Verbrennung des Phosphordampfes im Ofen durch Luftzufuhr anwenden, bei der bisher zur Erzielung hochkonzentrierter Säure meist das Cottrell-Verfahren zur Abscheidung der Pentoxydnebel benutzt wurde. Während dieses Verfahren jedoch kostspieliger Einrichtungen bedarf, läßt sich das beschriebene Verfahren mit einfachen, bekannten Vorrichtungen ausführen.The process can also be applied to the electrothermal production of Apply phosphoric acid by burning the phosphorus vapor in the furnace by supplying air, in the case of the previously used to achieve highly concentrated acid, mostly the Cottrell process was used to separate the pentoxide mist. During this procedure, however requires expensive facilities, the process described can be carried out with simple, run known devices.

Claims (1)

PATENTANSPRUCH Verfahren zur Herstellung von Phosphorsäure durch Verbrennung von Phosphor oder phosphorhaltigen Gasgemischen und Absorption des gebildeten P205 durch Phosphorsäure, dadurch gekennzeichnet, daß heiße Phosphorsäurelösungen mittlerer Konzentrationen zur weiteren Absorption des Pentoxyds verwendet werden.PATENT CLAIM Process for the production of phosphoric acid by incineration of phosphorus or gas mixtures containing phosphorus and absorption of the P205 formed by phosphoric acid, characterized in that hot phosphoric acid solutions are medium Concentrations for further absorption of the pentoxide can be used.
DEC35578D 1924-10-24 1924-10-24 Process for the production of phosphoric acid Expired DE445822C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEC35578D DE445822C (en) 1924-10-24 1924-10-24 Process for the production of phosphoric acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC35578D DE445822C (en) 1924-10-24 1924-10-24 Process for the production of phosphoric acid

Publications (1)

Publication Number Publication Date
DE445822C true DE445822C (en) 1927-06-18

Family

ID=7021886

Family Applications (1)

Application Number Title Priority Date Filing Date
DEC35578D Expired DE445822C (en) 1924-10-24 1924-10-24 Process for the production of phosphoric acid

Country Status (1)

Country Link
DE (1) DE445822C (en)

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