DE37333C - Process for the preparation of magnesium phosphates by means of sulphurous acid using the same twice - Google Patents

Process for the preparation of magnesium phosphates by means of sulphurous acid using the same twice

Info

Publication number
DE37333C
DE37333C DENDAT37333D DE37333DA DE37333C DE 37333 C DE37333 C DE 37333C DE NDAT37333 D DENDAT37333 D DE NDAT37333D DE 37333D A DE37333D A DE 37333DA DE 37333 C DE37333 C DE 37333C
Authority
DE
Germany
Prior art keywords
magnesium
sulphurous acid
lime
solution
preparation
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 - Lifetime
Application number
DENDAT37333D
Other languages
German (de)
Original Assignee
Freiherr M. VON MALTZAN in Doberan, Mecklenburg
Publication of DE37333C publication Critical patent/DE37333C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05BPHOSPHATIC FERTILISERS
    • C05B9/00Fertilisers based essentially on phosphates or double phosphates of magnesium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Fertilizers (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

PATENTSCHRIFTPATENT LETTERING

. KLASSE 16: Düngerbereitung.. CLASS 16: Fertilizer preparation.

Patentirt im Deutschen Reiche vom 19. Januar 1886 ab.Patented in the German Empire on January 19, 1886.

Um Magnesiumphosphat darzustellen, bringt man Kalkphosphat durch schweflige Säure in Lösung und setzt eine dem gelösten Kalk entsprechende Menge Magnesiumsulfat zu und darauf nach der Filtration so viel Magnesiumoxyd, -Carbonat oder -Hydroxyd,' dafs gerade Magnesiumphosphat ausgefällt wird.In order to produce magnesium phosphate, lime phosphate is brought in by means of sulphurous acid Solution and adds an amount of magnesium sulphate corresponding to the dissolved lime and thereupon, after filtration, enough magnesium oxide, carbonate or hydroxide, just enough Magnesium phosphate is precipitated.

Die überstehende Lösung des Magnesiumsulfits wird in geeigneter Weise (durch Einblasen von Luft, durch Eisenoxyde oder Braunstein etc.) wieder in Sulfat übergeführt und zum Ueberführen des Kalkes einer zweiten Portion Kalkphosphat in Gyps benutzt. Auf diese Weise gelingt es, die angewendete schweflige Säure zweimal zu benutzen.The supernatant solution of the magnesium sulfite is removed in a suitable manner (by blowing in from air, through iron oxides or manganese dioxide, etc.) converted back into sulfate and a second portion of lime phosphate is used to convert the lime into gypsum. on In this way it is possible to use the sulphurous acid applied twice.

Claims (1)

Patent-Anspruch:Patent claim: Die Darstellung von Magnesiumbi- und Triphosphat aus Kalkphosphaten unter doppelter Benutzung desselben Quantums schwefliger Säure dadurch, dafs man die Kalkphosphate mittelst schwefliger Säure in Lösung bringt und entweder gleichzeitig oder nachfolgend ein dem gelösten Kalk entsprechendes Quantum Magnesiumsulfat zusetzt, den ausgeschiedenen Gyps abültrirt und die Lösung mit so viel Magnesiumoxyd, -Hydroxyd oder -Carbonat versetzt, dafs gerade Magnesiumbi- oder Triphosphat gebildet wird und die überstehende Lösung von Magnesiumsulfit durch oxydirende Mittel wieder in Sulfat überführt, welches wieder zur Abscheidung des Kalkes einer neuen Menge mit schwefliger Säure in Lösung gebrachter Kalkphosphate dient.The representation of magnesium bisphosphate and triphosphate from lime phosphates under double Use of the same quantity of sulphurous acid by using the calcium phosphate brings into solution by means of sulphurous acid and either simultaneously or subsequently a quantity of magnesium sulphate corresponding to the dissolved lime is added to the precipitated Wash off the gypsum, and wash the solution with as much magnesium oxide, hydroxide, or carbonate added that magnesium bisphosphate or triphosphate is formed and the supernatant The solution of magnesium sulphite is converted back into sulphate by oxidizing agents, which again leads to the separation of the lime a new amount of lime phosphates dissolved with sulphurous acid is used.
DENDAT37333D Process for the preparation of magnesium phosphates by means of sulphurous acid using the same twice Expired - Lifetime DE37333C (en)

Publications (1)

Publication Number Publication Date
DE37333C true DE37333C (en)

Family

ID=313094

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT37333D Expired - Lifetime DE37333C (en) Process for the preparation of magnesium phosphates by means of sulphurous acid using the same twice

Country Status (1)

Country Link
DE (1) DE37333C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE927153C (en) * 1943-06-19 1955-05-02 Theodor Dr Schmidt Process for the production of calcium magnesium phosphates

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE927153C (en) * 1943-06-19 1955-05-02 Theodor Dr Schmidt Process for the production of calcium magnesium phosphates

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