DE538549C - Production of orthophosphoric acid by splitting ammonium salts of this - Google Patents
Production of orthophosphoric acid by splitting ammonium salts of thisInfo
- Publication number
- DE538549C DE538549C DER80561D DER0080561D DE538549C DE 538549 C DE538549 C DE 538549C DE R80561 D DER80561 D DE R80561D DE R0080561 D DER0080561 D DE R0080561D DE 538549 C DE538549 C DE 538549C
- Authority
- DE
- Germany
- Prior art keywords
- orthophosphoric acid
- ammonium salts
- splitting
- production
- acid
- 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
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
- C01B25/185—Preparation neither from elemental phosphorus or phosphoric anhydride nor by reacting phosphate-containing material with an acid, e.g. by reacting phosphate-containing material with an ion-exchange resin or an acid salt used alone
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
Description
Herstellung von Orthophosphorsäure durch Spaltung von Ammoniumsalzen dieser Bei der Erhitzung von Ammonsalzen der Orthophosphorsäure bildet sich ein kompliziertes Gemisch von Stickstoff-Phosphor-Sauerstoff-Verbindungen. Es gelingt auf diesem Wege nicht, unter Abspaltung des gesamten Ammoniaks zu freier Phosphorsäure oder zu einem Gemisch von Phosphorsäuren zu gelangen, aus dem in bekannter Weise Orthophosphorsäure hergestellt werden kann.Production of orthophosphoric acid by splitting ammonium salts This occurs when ammonium salts of orthophosphoric acid are heated complicated mixture of nitrogen-phosphorus-oxygen compounds. It succeeds not in this way, with splitting off of all the ammonia to free phosphoric acid or to arrive at a mixture of phosphoric acids, from which in a known manner Orthophosphoric acid can be produced.
Es wurde gefunden, daß sich die Ammoniaksalze der Orthophosphorsäuren unter praktisch vollständiger Gewinnung des ge-@ samten Ammoniaks in Orthophosphorsäure oder Reaktionsgemische, aus denen diese nach den bekannten Methoden regeneriert werden kann, sich überführen lassen. Die Abspaltung des gesamten Ammoniaks aus den Ammoniumsalzen der Orthophosphorsäure geschieht durch Erhitzen im Vakuum. Dies gelingt schon bei Temperaturen oberhalb 2oo°, bei denen eine gegenseitige Einwirkung von Ammoniak und Phosphorsäure nicht stattfindet: Ausführungsbeispiele i. In einem Kolben aus Pythagorasmasse, der durch eine Ableitung mit einem auf - 8o° gekühlten Kondensationsgefäß verbunden ist, werden i o g Diammonphosphat auf 35o bis 38o° erhitzt, während in der Apparatur ein Druck von 5o bis i oo mm Hg gehalten wird. Aus der Schmelze entwickeln sich Wasserdampf und. Ammoniak, die in dem gekühlten Gefäß kondensiert werden. Nach 2o Minuten ist die Gasentwicklung beendet. Der Rückstand besteht aus 6 g Metaphosphorsäure, in der kein Stickstoff mehr nachzuweisen ist. Das gesamte im Diammönphosphat enthaltene Ammoniak, 2,57 g, ist neben 1,4 ,-, Wasser im gekühlten Gefäß abgeschieden.It has been found that the ammonia salts of orthophosphoric acids with practically complete recovery of the entire ammonia in orthophosphoric acid or reaction mixtures from which this regenerates according to known methods can be convicted. The elimination of all ammonia from the Ammonium salts of orthophosphoric acid are made by heating in a vacuum. This works even at temperatures above 2oo °, at which a mutual effect of Ammonia and phosphoric acid does not take place: Embodiments i. In a flask from Pythagoras mass, which is discharged by a condensation vessel cooled to -80 ° is connected, i o g of diammonophosphate are heated to 35o to 38o °, while in a pressure of 50 to 100 mm Hg is maintained in the apparatus. Develop from the melt water vapor and. Ammonia, which will be condensed in the cooled vessel. To The evolution of gas has ended for 20 minutes. The residue consists of 6 g metaphosphoric acid, in which no more nitrogen can be detected. All contained in the diammon phosphate Ammonia, 2.57 g, is deposited in the cooled vessel along with 1.4, -, water.
Die gebildete Metaphosphorsäure läßt sich mit Wasser, besonders leicht in Gegenwart von Spuren anderer Mineralsäuren, in Orthophosphorsäure überführen.The metaphosphoric acid formed can be easily removed with water in the presence of traces of other mineral acids, convert to orthophosphoric acid.
2. In der Anordnung des Beispiels i werden 15 g eines Gemisches äquivalenter Mengen von Mono- und Diammonphosphat unter einem Druck von 5o mm Hg auf 23o bis 26o° erhitzt. Nach 40 Minuten besteht der Rückstand aus einem Gemisch von ungefähr gleichen Teilen Meta- und Pyrophosphorsäure. Das gesamte im Salzgemisch enthaltene Ammoniak- 3,o g wird, abgesehen von geringen Spuren, die im Rückstand bleiben, unzersetzt abgetrieben.2. In the arrangement of Example i, 15 g of a mixture of equivalent amounts of mono- and diammonophosphate are heated to 23o to 26o ° under a pressure of 50 mm Hg. After 40 minutes the residue consists of a mixture of approximately equal parts of meta- and pyrophosphoric acid. All of the ammonia contained in the salt mixture, with the exception of small traces that remain in the residue, is driven off without decomposition.
Das Gemisch von Meta- und Pyrophosphorsäure läßt sich, wie im Beispiel i, mit der nötigen Menge Wasser in Orthophosphorsäure umwandeln.The mixture of meta- and pyrophosphoric acid can be, as in the example i, convert into orthophosphoric acid with the necessary amount of water.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER80561D DE538549C (en) | 1931-01-30 | 1931-01-30 | Production of orthophosphoric acid by splitting ammonium salts of this |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER80561D DE538549C (en) | 1931-01-30 | 1931-01-30 | Production of orthophosphoric acid by splitting ammonium salts of this |
Publications (1)
Publication Number | Publication Date |
---|---|
DE538549C true DE538549C (en) | 1931-11-14 |
Family
ID=7416313
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DER80561D Expired DE538549C (en) | 1931-01-30 | 1931-01-30 | Production of orthophosphoric acid by splitting ammonium salts of this |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE538549C (en) |
-
1931
- 1931-01-30 DE DER80561D patent/DE538549C/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE538549C (en) | Production of orthophosphoric acid by splitting ammonium salts of this | |
DE665258C (en) | Process for the production of dry, spreadable diammonophosphate fertilizers | |
DE967522C (en) | Process for the production of a storage-stable, nitrogen-free phosphate fertilizer or feed supplement | |
DE971451C (en) | Process for the production of polymeric, water-insoluble ammonium metaphosphate | |
DE632570C (en) | Process for the production of phosphoric acid triesters of aliphatic alcohols | |
DE530052C (en) | Process for the production of urea phosphate fertilizers | |
DE965126C (en) | Process for the production of polyphosphates, especially sodium tripolyphosphate | |
AT204054B (en) | Process for the preparation of a fertilizer containing urea and ammonium sulphate | |
DE1216267B (en) | Process for the production of ammonia from carbon distillation gases in the form of diammonium phosphate | |
DE545584C (en) | Process for the production of enriched ammonia superphosphate | |
DE568086C (en) | Process for the production of fertilizers | |
DE1022566B (en) | Process for the production of nitrogen-phosphoric acid compounds | |
DE363272C (en) | Process for blunting acidic phosphate solutions obtained from phosphates by digestion with nitric acid | |
DE825415C (en) | Process for the production of resorcinol | |
DE517747C (en) | Process for evacuating the copper oxide ammonia cellulose spinning solutions with recovery of the simultaneously escaping gaseous ammonia | |
DE710759C (en) | Process for the production of a phosphate fertilizer from Thomas flour | |
DE842790C (en) | Process for the continuous production of formic acid | |
DE561078C (en) | Production of mixtures containing alkali phosphate and alkali carbonate | |
DE1017630B (en) | Process for the production of fertilizers containing urea and ammonium sulphate with a high nitrogen content | |
DE888689C (en) | Process for the production of dimethylcarbamic acid chloride | |
DE639528C (en) | Process for the production of nitrogen-containing salt mixtures | |
DE686109C (en) | sulfuric acid from waste acids | |
DE528267C (en) | Production of red phosphorus from gases and vapors containing phosphorus | |
AT95482B (en) | Process for the production of urea from cyanamide. | |
DE608576C (en) | Process for the production of mixed fertilizers |