DE487956C - Process for the production of glow phosphates - Google Patents

Process for the production of glow phosphates

Info

Publication number
DE487956C
DE487956C DER69191D DER0069191D DE487956C DE 487956 C DE487956 C DE 487956C DE R69191 D DER69191 D DE R69191D DE R0069191 D DER0069191 D DE R0069191D DE 487956 C DE487956 C DE 487956C
Authority
DE
Germany
Prior art keywords
production
silicic acid
phosphates
alkaline
glow
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
DER69191D
Other languages
German (de)
Inventor
Dr Hans Brenck
Dr Fritz Rothe
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.)
Kali Chemie AG
Original Assignee
Kali Chemie 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 Kali Chemie AG filed Critical Kali Chemie AG
Priority to DER69191D priority Critical patent/DE487956C/en
Application granted granted Critical
Publication of DE487956C publication Critical patent/DE487956C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B13/00—Fertilisers produced by pyrogenic processes from phosphatic materials
    • C05B13/02—Fertilisers produced by pyrogenic processes from phosphatic materials from rock phosphates

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Description

Verfahren zur Herstellung von Glühphosphaten Glühphosphate werden bekanntlich in der Weise hergestellt, daß man Phosphorite in Mischung mit Alkalicarbonaten, Alkalisilikaten oder alkalihaltigen Gesteinen, wie Leuzit, Plionolith o. dgl., derart erhitzt, daß eine geschmolzene Masse entsteht.Process for the production of calcined phosphates are calcined phosphates is known to be produced in such a way that phosphorites are mixed with alkali carbonates, Alkali silicates or alkaline rocks such as leucite, plionolite or the like heated to form a molten mass.

Diesem Verfahren haften manche übelstände an, die insbesondere darin bestehen, daß durch die geschmolzene blasse das Ofenmaterial starkangegriffen wird, so daß schon manches aussichtsvolle Verfahren aus diesem Grunde sich auf die Dauer technisch nicht durchführen ließ, wie es z. B. von dem Wolterphosphat bekannt ist. Ferner erfordert der Schmelzprozeß einen erheblichen Brennstoffaufwand.Many evils are attached to this procedure, especially in it insist that the furnace material is severely attacked by the molten pale, so that many a promising procedure for this reason is in the long run could not be carried out technically, as z. B. of the Wolter phosphate is known. Furthermore, the melting process requires a considerable amount of fuel.

Es wurde nun &efunden, daß man das Schmelzen vermeiden und ein leicht gesintertes, porÖses Produkt erhalten kann, wenn man den Glühprozeß in Gegenwart von Wasserdampf durchführt. Offenbar begünstigt der Wasserdampf die Zersetzung gewisser in dem Rohphosphat enthaltenen Stoffe, wie Calciumfluorid und Gips, deren Gegenwart, wie bekannt wurde, aufschlußhemmend wirkt. Wendet man keinen Wasserdampf an, so muß die Mischung in den feurig flüssigen Zustand übergeführt werden, um (las Fluor und die Schwefelsäure auszutreiben. Beispiele 1. xoo Teile eines Phosphats mit '77,2 0/0 Ca;.(PO4)" 4,1% CaCO, 3,4 % SiO2, 2,0 0/0 CaS0, und 8,1 0/0 CaF2 wurden mit 115 Teilen Phonolith und 161 Teilen Kalk gemischt und in einem mit Kohlenstaubfeuerung beheizten Ofen bei einer Temperatur von 1 15o° erhitzt. Die- Mischung begann alsbald zu schmelzen, und man erhielt ein Glühprodukt in Form harter,- dichter Blinker, deren Gehalt an Gesamtphosphorsäure 11,9 0/0 P205 und an citratlösliclierPhosphorsäure (nach P e t e rm a n n) 6,2 0/0 P;0; betrug. Das Glühprodukt enthielt rund 52 % ammoncitratlösliche P205 und noch 2,2 % Cah. und o,6 % CaS04.It has now been found that one can avoid melting and one easily sintered, porous product can be obtained if the annealing process is in the presence performed by steam. Apparently the water vapor favors the decomposition of certain things substances contained in the rock phosphate, such as calcium fluoride and gypsum, their presence, as has been known, has an inhibiting effect on exposure. If you don't use steam, so the mixture must be converted into the fiery liquid state in order to (read Fluor and drive off the sulfuric acid. Examples 1. xoo parts of a phosphate with '77, 2 0/0 Ca;. (PO4) "4.1% CaCO, 3.4% SiO2, 2.0% CaS0, and 8.1% CaF2 were with 115 parts of phonolite and 161 parts of lime mixed and in one with pulverized coal firing heated oven heated to a temperature of 1 15o °. The mixture began immediately to melt, and you got a glow product in the form of hard, - dense blinkers, their content of total phosphoric acid 11.9% P205 and of citrate-soluble phosphoric acid (after P e t e rm a n n) 6.2 0/0 P; 0; fraud. The annealing product contained around 52% ammonium citrate soluble P205 and another 2.2% Cah. and 0.6% CaS04.

2. Die gleiche Mischung wurde ebenfalls bei 115o° unter gleichen Bedingungen, jedoch in Gegenwart reichlicher Mengen Wasserdampf geglüht. Die Mischung kam nicht zum Schmelzen, und man erhielt ein leicht gesintertes, poröses Produkt mit einem Gehalt an Gesamtphosphorsäure von 12,o 0/0 P20;, und einem Gehalt an citratlöslicher Phosphorsäure (nach Petermann) von 9,6 0/0 P205. Das Glühprodukt enthielt rund 8o0,1, ammoncitratlösliche Phosphorsäure und war frei von F und SO,2. The same mixture was also made at 115o ° under the same conditions, but annealed in the presence of copious amounts of steam. The mixture didn't come to melt, and a lightly sintered, porous product with a Total phosphoric acid content of 12.0% P20; and a content of citrate-soluble Phosphoric acid (according to Petermann) of 9.6 0/0 P205. The glow product contained around 8o0.1, ammonium citrate soluble phosphoric acid and was free from F and SO,

Claims (1)

PATENTANSPRUCII: Verfahren zur Herstellung von Glühphosphaten durch Erhitzen von Phosphoriten in Mischung mit alkalisch reagierenden Alkaliverbindungen (Carbonate oder Hydroxyde) oder alkalihaltigen Gesteinen, wie Leuzit, Phonolith oder ähnlichen und Kieselsäure oder kieselsäurehaltigen Stoffen, gegebenenfalls unter Zusatz von Kalk, dadurch gekennzeichnet, dafj man den GlühprozeB in Gegenwart solcher Wasserdampfmengen durchführt, dafj die aufschlußhemmenden Stoffe zersetzt werden, ohne daB ein Schmelzen der Reaktionsmasse eintritt.PATENT CLAIM: Process for the production of calcined phosphates by Heating of phosphorites mixed with alkaline reacting alkali compounds (Carbonates or hydroxides) or alkaline rocks such as leucite, phonolite or similar and silicic acid or silicic acid-containing substances, if appropriate with the addition of lime, characterized in that the annealing process is carried out in the presence carries out such amounts of water vapor that the decomposition-inhibiting substances decompose without melting of the reaction mass.
DER69191D 1926-11-02 1926-11-02 Process for the production of glow phosphates Expired DE487956C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER69191D DE487956C (en) 1926-11-02 1926-11-02 Process for the production of glow phosphates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER69191D DE487956C (en) 1926-11-02 1926-11-02 Process for the production of glow phosphates

Publications (1)

Publication Number Publication Date
DE487956C true DE487956C (en) 1929-12-16

Family

ID=7413583

Family Applications (1)

Application Number Title Priority Date Filing Date
DER69191D Expired DE487956C (en) 1926-11-02 1926-11-02 Process for the production of glow phosphates

Country Status (1)

Country Link
DE (1) DE487956C (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE740368C (en) * 1939-10-26 1943-10-19 Metallgesellschaft Ag Process for the production of a citrate-soluble, alkaline and phosphoric acid-containing fertilizer
DE1018075B (en) * 1955-08-03 1957-10-24 Walter Hildebrand Process for the production of ammonium citrate-soluble sintered phosphate fertilizers
DE1294979B (en) * 1966-11-16 1969-05-14 Kali Chemie Ag Process for the production of gluehphosphate fertilizers
DE1294978B (en) * 1966-09-13 1969-05-14 Kali Chemie Ag Process for the production of gluehphosphate fertilizers
US20120031008A1 (en) * 2006-03-14 2012-02-09 3Form, Inc. Sliding panel system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE740368C (en) * 1939-10-26 1943-10-19 Metallgesellschaft Ag Process for the production of a citrate-soluble, alkaline and phosphoric acid-containing fertilizer
DE1018075B (en) * 1955-08-03 1957-10-24 Walter Hildebrand Process for the production of ammonium citrate-soluble sintered phosphate fertilizers
DE1294978B (en) * 1966-09-13 1969-05-14 Kali Chemie Ag Process for the production of gluehphosphate fertilizers
DE1294979B (en) * 1966-11-16 1969-05-14 Kali Chemie Ag Process for the production of gluehphosphate fertilizers
US20120031008A1 (en) * 2006-03-14 2012-02-09 3Form, Inc. Sliding panel system

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