DE435387C - Manufacture of phosphorus, phosphorus pentoxide and phosphoric acid - Google Patents

Manufacture of phosphorus, phosphorus pentoxide and phosphoric acid

Info

Publication number
DE435387C
DE435387C DEC34443D DEC0034443D DE435387C DE 435387 C DE435387 C DE 435387C DE C34443 D DEC34443 D DE C34443D DE C0034443 D DEC0034443 D DE C0034443D DE 435387 C DE435387 C DE 435387C
Authority
DE
Germany
Prior art keywords
phosphorus
phosphoric acid
manufacture
pentoxide
pure
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
DEC34443D
Other languages
German (de)
Inventor
Dr Ernst Borsbach
Dr-Ing H C Gustav Pistor Dr
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 DEC34443D priority Critical patent/DE435387C/en
Application granted granted Critical
Publication of DE435387C publication Critical patent/DE435387C/en
Expired legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00Phosphorus; Compounds thereof
    • C01B25/003Phosphorus
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00Phosphorus; Compounds thereof
    • C01B25/01Treating phosphate ores or other raw phosphate materials to obtain phosphorus or phosphorus compounds
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00Phosphorus; Compounds thereof
    • C01B25/12Oxides of phosphorus
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00Phosphorus; Compounds thereof
    • C01B25/16Oxyacids of phosphorus; Salts thereof
    • C01B25/18Phosphoric acid
    • C01B25/20Preparation from elemental phosphorus or phosphoric anhydride

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Treating Waste Gases (AREA)

Description

Herstellung von Phosphor, Phosphorpentoxyd und Phosphorsäure. Bei der Herstellung von Phosphor im elektrischen Ofen hat man es bisher für richtig gehalten, die in den Kohlenoxydgasen enthaltenen Phosphordämpfe möglichst unmittelbar der Kondensation unter Wasser zuzuführen.Manufacture of phosphorus, phosphorus pentoxide and phosphoric acid. at The production of phosphorus in an electric furnace has been considered right up to now kept the phosphorus vapors contained in the carbon dioxide gases as immediate as possible to feed the condensation under water.

Hierbei hat sich jedoch gezeigt, daß der stets vom Gasstrom mitgerissene Flugstaub aus Abrieb und im Lichtbogen verdampften oder zerstäubten Bestandteilen .der Beschikkung die Kondensation an sich zwar nicht erschwert, wohl aber stets einen gewissen Anteil des Phosphors durch Adsorption anlagert und zur Bildung einer Verschlammung in der Kondensation führt, welche die Ausbeute an reinem Phosphor beeinträchtigt. Außerdem muß der phosphorhaltige Schlamm im Interesse einer ungefährlichen Beseitigung desselben wieder aufgearbeitet werden. Der Einbau von Flugstaubkammern der üblichen Bauweise genügt nicht zur Behebung der geschilderten Unannehmlichkeiten.Here, however, it has been shown that the is always entrained by the gas flow Flue dust from abrasion and components evaporated or atomized in the arc .the charging does not make the condensation more difficult, but it always does a certain amount of phosphorus accumulates through adsorption and leads to the formation of a Sludge formation in the condensation leads to which the yield of pure phosphorus impaired. In addition, the phosphorus-containing sludge in the interests of harmless Elimination of the same can be worked up again. The installation of airborne dust chambers the usual design is not sufficient to remedy the inconveniences described.

Es ist nun gefunden worden, daß durch die Einschaltung einer Staubkammer, welche einerseits in ihrer gesamten Ausdehnung mit Hilfe der von den Gasen mitgeführten Eigenwärme in Verbindung mit einer geeigneten Wärmeisolierung oder Wärmezufuhr von außen dauernd auf einer Temperatur in hinreichender Höhe oberhalb des Taupunktes des Phosphors erhalten wird und anderseits zugleich mit Vorrichtungen zur elektrischen Gasreinigung ausgestattet ist, eine praktisch vollständige Verhinderung der Schlammbildung erreicht wird. Die Auswahl eines bestimmten Systems unter den bisher hierfür bekannten Vorrichtungen bildet nicht den Gegenstand der Erfindung.It has now been found that by switching on a dust chamber, which on the one hand in their entire extent with the help of the gases carried along Intrinsic heat in connection with suitable thermal insulation or heat supply from outside permanently at a temperature sufficiently above the dew point of phosphorus is obtained and on the other hand at the same time with devices for electrical Gas cleaning is equipped, a practically complete prevention of sludge formation is achieved. The selection of a particular system among those previously known for this purpose Devices do not form the subject of the invention.

Die Einführung dieser Reinigung der Gase bedeutet nun, wie sich gezeigt hat, nicht nur bezüglich der unmittelbaren Gewinnung eines reinen Phosphors in größerer Ausbeute einen Fortschritt, sondern auch dadurch, daß auf diesem Wege an die gleiche Apparatur auch eine Anordnung für die unmittelbare Gewinnung von reinem Phosphorpentoxyd aus den Phosphordämpfen des elektrischen Ofens angeschlossen werden kann, so daß je nach Bedarf das eine oder andere Produkt erzeugt werden kann und daß die Erzeugung eines reinen Phosphorpentoxydes nicht mehr die Isolierung des Phosphors voraussetzt.The introduction of this purification of the gases now means, as has been shown has, not only with regard to the immediate production of a pure phosphorus in larger quantities Yield some progress, but also by taking this path to the same Apparatus also includes an arrangement for the direct extraction of pure phosphorus pentoxide can be connected from the phosphorus fumes of the electric furnace, so that Depending on requirements, one or the other product can be produced and that the production a pure phosphorus pentoxide no longer presupposes the isolation of the phosphorus.

Es sind bereits Verfahren bekannt, bei welchen Phosphorsäure aus Phosphor im elektrischen Ofen erzeugt wird, indem dem Ofen ein gewisser Luftüberschuß von hinreichendem Feuchtigkeitsgehalt zugeführt wird, so daß in der an dem Ofen angeschlossenen elektrischen Verdichtungsanlage mehr oder weniger hoch konzentrierte Phosphorsäure sich ausscheidet. Im Gegensatz hierzu wird bei vorliegendem Verfahren zunächst durch die Reinigung der wasserdampffreien Gase in der heißen Staubkammer ein reines Kohlenoxvd-Phosphordampfgemisch erzeugt, welchem dann Verbrennungsluft zugeleitet wird. Aus den Verbrennungsprodukten wird durch Absorption mit Wasser die Phosphorsäure unmittelbar gewonnen.Processes are already known in which phosphoric acid is derived from phosphorus is generated in the electric furnace by adding a certain excess of air to the furnace sufficient moisture content is supplied so that in the connected to the furnace electrical compression system more or less highly concentrated phosphoric acid is eliminated. In contrast to this, in the case of the present method, the purification of the steam-free gases in the hot dust chamber a pure carbon dioxide-phosphorus vapor mixture is generated, which is then used for combustion air is forwarded. The products of combustion become through absorption with water the phosphoric acid obtained immediately.

Claims (1)

PATENT-ANSPRÜCf1E: r. Verfahren zur Herstellung von reinein Phosphor, dadurch gekennzeichnet, daß die dem Phosphorofen entströmenden heißen Rohgase unmittelbar durch eine auf Temperaturen oberhalb des Taupunk-,es des Phosphors gehaltene, mit Vorrichtungen zur elektrischen Entstaubung v ersehene Flugstaubkammer geführt «-erden. a. Verfahren nach Anspruch r zwecks Gewinnung von reinem Phosphorpentoxyd bzw. Phosphorsäure, dahin weiter ausgebildet, daß dem elektrisch von Flugstaub befreiten, strömenden Gasgemisch von Phosphordampf und Kohlenoxyd Verbrennungsluft zugeführt wird, worauf die Abgase einer Verdichtungsanlage zugeführt werden.PATENT CLAIMS: r. Process for the production of pure phosphorus, characterized in that the hot raw gases flowing out of the phosphor furnace directly by one at temperatures above the dew point, it kept the phosphorus, with Devices for electrical dedusting provided flue dust chamber «-earth. a. Process according to claim r for the purpose of obtaining pure phosphorus pentoxide or phosphoric acid, further developed so that the flowing electrically freed from fly dust Gas mixture of phosphorus vapor and carbon oxide combustion air is supplied, whereupon the exhaust gases are fed to a compression system.
DEC34443D 1924-02-11 1924-02-12 Manufacture of phosphorus, phosphorus pentoxide and phosphoric acid Expired DE435387C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEC34443D DE435387C (en) 1924-02-11 1924-02-12 Manufacture of phosphorus, phosphorus pentoxide and phosphoric acid

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE229282T 1924-02-11
DEC34443D DE435387C (en) 1924-02-11 1924-02-12 Manufacture of phosphorus, phosphorus pentoxide and phosphoric acid

Publications (1)

Publication Number Publication Date
DE435387C true DE435387C (en) 1926-10-11

Family

ID=31947355

Family Applications (1)

Application Number Title Priority Date Filing Date
DEC34443D Expired DE435387C (en) 1924-02-11 1924-02-12 Manufacture of phosphorus, phosphorus pentoxide and phosphoric acid

Country Status (1)

Country Link
DE (1) DE435387C (en)

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