DE402088C - Process for the production of phosphates soluble in two percent citric acid - Google Patents

Process for the production of phosphates soluble in two percent citric acid

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Publication number
DE402088C
DE402088C DEC32649D DEC0032649D DE402088C DE 402088 C DE402088 C DE 402088C DE C32649 D DEC32649 D DE C32649D DE C0032649 D DEC0032649 D DE C0032649D DE 402088 C DE402088 C DE 402088C
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DE
Germany
Prior art keywords
percent
citric acid
production
soluble
percent citric
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
DEC32649D
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German (de)
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.)
CHEMISCHE FABRIKEN WOLKRAMSHAU
EBERHARD KAYSER DR
Original Assignee
CHEMISCHE FABRIKEN WOLKRAMSHAU
EBERHARD KAYSER DR
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 CHEMISCHE FABRIKEN WOLKRAMSHAU, EBERHARD KAYSER DR filed Critical CHEMISCHE FABRIKEN WOLKRAMSHAU
Priority to DEC32649D priority Critical patent/DE402088C/en
Application granted granted Critical
Publication of DE402088C publication Critical patent/DE402088C/en
Expired legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05BPHOSPHATIC FERTILISERS
    • C05B3/00Fertilisers based essentially on di-calcium phosphate

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Fertilizers (AREA)

Description

Verfahren zur Herstellung in zweiprozentiger Zitronensäure löslicher Phosphate. Es ist bekannt, daß die Aufnahme der Phosphorsäure durch die Pflanzen begünstigt. Es ist deshalb von großer Wichtigkeit, von vornherein magnesiumhaltige Phosphate auf den Acker zu geben.Method of preparation more soluble in two percent citric acid Phosphates. It is known that the absorption of phosphoric acid by the plants favored. It is therefore of great importance to use magnesium-containing foods from the outset To give phosphates to the field.

Die vorliegende Erfindung betrifft die Herstellung eines zur Düngung geeigneten dreibasischen Kalziummagnesiumphosphates, beispielsweise von der Zusammensetzung Ca Mg. (P04)2 # Mg Cl@ oder Cal Mg (P04)2 # 141g C12 durch Erhitzen einer Mischung von Dikalziumphosphat mit größeren '\lengen wäßriger Chlormagnesiumlösung. Es kann ein Dikalziumphosphat irgendwelcher Herkunft benutzt werden; Chlormagnesium wird zweckmäßig in Form von Endlauge der Kaliindustrie verwendet, welche im wesentlichen eine Lösung von Chlormagnesium im Wasser darstellt.The present invention relates to the production of a tribasic calcium magnesium phosphate suitable for fertilization, for example of the composition Ca Mg. (PO4) 2 # Mg Cl @ or Cal Mg (PO4) 2 # 141g C12 by heating a mixture of dicalcium phosphate with larger amounts of aqueous Magnesium chlorine solution. Dicalcium phosphate of any origin can be used; Magnesium chlorine is expediently used in the form of final liquor from the potash industry, which is essentially a solution of magnesium chlorine in water.

Das Erzeugnis ist unlöslich in Wasser, aber löslich iri zweiprozentiger Zitronensäure, also als Düngemittel geeignet.The product is insoluble in water, but soluble in two percent Citric acid, so suitable as a fertilizer.

Bei der Umsetzung wird Salzsäure frei. Die Umsetzung verläuft z. B. gemäß folgender Gleichung z Ca H P04 .-I- Z Mg Cl" = Ca. Mg (P04)2 # Mg C1.2 -[- a H Cl. Bei höherer Temperatur und bei längerer Reaktionsdauer beteiligt sich eine größere 1Tenge von lI-Cl= an der Umsetzung ,unter Verdrängung von Kalzium aus seiner Phosphorsäurebindung, et«--a nach der Glelchlmg 4 Ca H P04 -I- 7 Mg C12 = Ca blg2 (POa)2 - Mg C12 -1-. Mg- (P04)2 . M9 C1, -I- 3 C a C12 -I- 4 H Cl. Die Anlagerung des Chlorides an das tertiäre Phosphat ist nicht immer vollkommen, es findet sich daher neben dem Doppelsalz auch chlorfreies Phosphat; Beispiele solcher Umsetzungen sind: z. 4 Ca H P04 -E- 3 Mg CI2 = Ca=\Ig (P04)2 # Mg C12 -L Cal Mg (P04) 2 + 4 H Cl.Hydrochloric acid is released during the reaction. The implementation proceeds z. B. according to the following equation z Ca H PO4. -I- Z Mg Cl "= Ca. Mg (PO4) 2 # Mg C1.2 - [- a H Cl. At higher temperatures and longer reaction times, a greater amount of lI-Cl = in the reaction, with the displacement of calcium from its phosphoric acid bond, et «- a after the equilibrium 4 Ca H PO4 -I- 7 Mg C12 = Ca blg2 (POa) 2 - Mg C12 -1-. Mg- (P04) 2 . M9 C1, -I- 3 C a C12 -I- 4 H Cl. The addition of the chloride to the tertiary phosphate is not always complete; therefore, in addition to the double salt, there is also chlorine-free phosphate; Examples of such reactions are: e.g. 4 Ca H P04 -E- 3 Mg CI2 = Ca = \ Ig (P04) 2 # Mg C12 -L Cal Mg (P04) 2 + 4 H Cl.

a. 6 Ca H P04 -f- S Mg C12 = Ca Mg. (P04).2 . @'g C12 -f- Ca \I92 (P04) 2 -f- Mg3 (P04) 2 -I- 4 Ca C12 -E- 6 H CI. Immer aber entsteht unter, Salzsäureentwicklung ein tertiäres Phosphat, welches Magnesium in Phosphorsäurebindung und als angelagertes Chlorid enthält und «-elches in z«-eiprozentitzer Zitronensäure löslich ist. Ausführungsbeispiel. too Teile Dikalziumphosphat wurden mit 5oo Teilen Endlauge von 28,7 Prozent M9Cl2 bis zu einer Temperatur von 13o° bis 138° C 3 Stunden lang erhitzt. Das mit Wasser ausgewaschene Erzeugnis enthielt 38,12 Prozent PA, 11,77 Prozent Ca0, 27,37 Prozent Mg0, 7,46 Prozent Cl.. a. 6 Ca H PO4 -f- S Mg C12 = Ca Mg. (P04) .2. @ 'g C12 -f- Ca \ I92 (PO4) 2 -f- Mg3 (P04) 2 -I- 4 Ca C12 -E- 6 H CI. However, with the evolution of hydrochloric acid, a tertiary phosphate is always formed, which contains magnesium in phosphoric acid bond and as an attached chloride and which is soluble in two-percent citric acid. Embodiment. too parts of dicalcium phosphate were heated for 3 hours with 500 parts of final liquor of 28.7 percent M9Cl2 up to a temperature of 130 ° to 138 ° C. The product washed out with water contained 38.12 percent PA, 11.77 percent Ca0, 27.37 percent Mg0, 7.46 percent Cl ..

Der Reaktionsvorgang läßt sich annähernd durch folgende Gleichung darstellen: z6 CaHPO,+ 34M9C12 - 5 CaMg2(P09)2 # MgCI2 -f- 5 CaMg2(POg)2 + 31!193(P0,)2+ i6 CaC12 .-f- a6 HCl. Das Erzeugnis besteht also aus: 46,20 Prozent Ca M92 (P04)2 # MgC4, 34,40 Prozent Ca M92 (P04)2, 19,40 Prozent M93 (P04)2 und ist zu 98 Prozent in zweiprozentiger Zitronensäure löslich.The reaction process can be approximated by the following equation represent: z6 CaHPO, + 34M9C12 - 5 CaMg2 (P09) 2 # MgCl2 -f- 5 CaMg2 (POg) 2 + 31! 193 (P0,) 2+ i6 CaC12. -f- a6 HCl. The product therefore consists of: 46.20 percent Ca M92 (P04) 2 # MgC4, 34.40 percent Ca M92 (P04) 2, 19.40 percent M93 (P04) 2 and is 98 percent soluble in two percent citric acid.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung in zweiprozentiger Zitronensäure löslicher Phosphate, dadurch gekennzeichnet, daß man Dikalziumphosphat mit größeren Mengen wäßriger Chlormagnesiurnlösung erhitzt. Claim: Process for the production of phosphates soluble in two percent citric acid, characterized in that dicalcium phosphate is heated with larger amounts of aqueous chloromagnesium solution.
DEC32649D 1922-10-01 1922-10-01 Process for the production of phosphates soluble in two percent citric acid Expired DE402088C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEC32649D DE402088C (en) 1922-10-01 1922-10-01 Process for the production of phosphates soluble in two percent citric acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC32649D DE402088C (en) 1922-10-01 1922-10-01 Process for the production of phosphates soluble in two percent citric acid

Publications (1)

Publication Number Publication Date
DE402088C true DE402088C (en) 1924-09-12

Family

ID=7020435

Family Applications (1)

Application Number Title Priority Date Filing Date
DEC32649D Expired DE402088C (en) 1922-10-01 1922-10-01 Process for the production of phosphates soluble in two percent citric acid

Country Status (1)

Country Link
DE (1) DE402088C (en)

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