CH148332A - Process for the production of high-percentage cyanamides of the metals of the 2nd group of the periodic table. - Google Patents
Process for the production of high-percentage cyanamides of the metals of the 2nd group of the periodic table.Info
- Publication number
- CH148332A CH148332A CH148332DA CH148332A CH 148332 A CH148332 A CH 148332A CH 148332D A CH148332D A CH 148332DA CH 148332 A CH148332 A CH 148332A
- Authority
- CH
- Switzerland
- Prior art keywords
- water
- cyanamides
- ammonia
- metals
- percentage
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 16
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 150000001912 cyanamides Chemical class 0.000 title claims description 4
- 229910052751 metal Inorganic materials 0.000 title claims description 4
- 239000002184 metal Substances 0.000 title claims description 4
- 150000002739 metals Chemical class 0.000 title claims description 4
- 230000000737 periodic effect Effects 0.000 title claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910021529 ammonia Inorganic materials 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 5
- 239000007858 starting material Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- XZMCDFZZKTWFGF-UHFFFAOYSA-N Cyanamide Chemical compound NC#N XZMCDFZZKTWFGF-UHFFFAOYSA-N 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims description 2
- MVXMNHYVCLMLDD-UHFFFAOYSA-N 4-methoxynaphthalene-1-carbaldehyde Chemical compound C1=CC=C2C(OC)=CC=C(C=O)C2=C1 MVXMNHYVCLMLDD-UHFFFAOYSA-N 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 3
- 239000003575 carbonaceous material Substances 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 101150016983 NFIA gene Proteins 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 150000004980 phosphorus peroxides Chemical class 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Description
Verfahren zur Herstellung hochprozentiger Cyanamide der Metalle der 2. Gruppe des periodischen Systems. Im Hauptpatent ist ein Verfahren zur Herstellung hochprozentiger Cyanamide der Metalle der 2. Gruppe des periodischen Systems durch Überleiten von Ammoniak über die Carbonate beschrieben, bei dem bei Tempe raturen oberhalb von 500 gearbeitet wird.
Es hat sich herausgestellt, dass die Cy- anamidbildung erheblich beschleunigt werden kann, wenn das sich bei der Reaktion nach der Gleichung Me"COs -f- <B>2</B> NFIa =112enCN2 + 3<B>H20</B> bildende Wasser ständig herausgenommen und das sich einstellende Reaktionsgleichgewicht auf diese Weise fortwährend gestört wird. Die Entfernung des Wassers kann auf phy sikalischem Wege durch Herabsetzung des Partialdrucks, Kondensation usw. oder auf chemischem Wege erfolgen.
Für die che mische Herausnahme sind alle Körper ge eignet, die das Wasser chemisch leicht binden oder sich mit ihm weiter umsetzen liöntien. So kann man Gase benutzen, die den Aus gangsgasen zugemischt werden und sich itn Reaktionsraum mit dem gebildeten Wasser sofort weiter umsetzen. Vielfach ist es vor teilhaft, die Herausnahme des Wassers durch Substanzen vorzunehmen, die in fester Form dem Prozess zugeführt werden, weil man hier bei die Unbequemlichkeit der Gasherstellungs- mischung und -aufbereitung spart.
Diese Sub stanzen können entweder hinter dein eigent lichen Reaktionsraum angeordnet oder mit dem zur Umsetzung gelangenden festen Aus gangsprodukt unmittelbar vermiselit werden. Da durch die beigefügten Substanzen die Hauptreaktion nicht gestört werden darf und besonders die Zersetzung des Ammoniaks vermieden werden muss, ist der Kreis der in Frage kommenden Körper beschränkt. Als geeignet haben sich zum Beispiel Kohlenstoff in beliebiger Form oder kohlenstoffhaltige Verbindungen erwiesen, wobei darauf geach tet werden mass, dass etwa verwendete Kohle,
Kohlenstoff oder kohlenstoffhaltiges Material nicht zuviel Ammoniak zersetzende Verbin dungen enthält. Die Herausnahrne des Was sers erfolgt in diesem Fall gemäss der Glei chung C+H:"0=CO-f-Hz.
Besonders vorteilhaft ist es, Stoffe zu ver wenden, die selbst oder in der im Laufe des Prozesses anfallenden Form die Düngewir kung des erhaltenen Calciumeyanamides er höhen, wie zum Beispiel Phosphorperrto$yd.
Es kann vorteilhaft sein, das Ausgangs material mit den Zusätzen zu brikettieren und in diesem Zustand oder in gekörnter Form der Ammoniakeinwirkung zu unter werfen.
Process for the production of high-percentage cyanamides of the metals of the 2nd group of the periodic table. The main patent describes a process for the production of high-percentage cyanamides of the metals of the 2nd group of the periodic table by passing ammonia over the carbonates, in which temperatures above 500 are used.
It has been found that the formation of cyanamide can be accelerated considerably if this results in the reaction according to the equation Me "COs -f- <B> 2 </B> NFIa = 112enCN2 + 3 <B> H20 </ B > The water that forms is constantly removed and the resulting reaction equilibrium is continually disturbed in this way. The water can be removed physically by reducing the partial pressure, condensation, etc., or by chemical means.
All bodies that easily chemically bind the water or react with it are suitable for chemical removal. So you can use gases that are mixed with the starting gases and react immediately in the reaction space with the water formed. In many cases it is advantageous to remove the water using substances that are added to the process in solid form, because here one saves the inconvenience of gas production mixing and processing.
These substances can either be arranged behind your actual reaction space or be immediately missed with the solid starting product to be implemented. Since the main reaction must not be disturbed by the substances added and, in particular, the decomposition of ammonia must be avoided, the range of bodies in question is limited. For example, carbon in any form or carbon-containing compounds have proven to be suitable, whereby care should be taken that any coal used,
Carbon or carbonaceous material does not contain too much ammonia-decomposing compounds. In this case, the water is removed according to the equation C + H: "0 = CO-f-Hz.
It is particularly advantageous to use substances which, either themselves or in the form obtained in the course of the process, increase the fertilizing effect of the calcium yanamide obtained, for example phosphorus peroxide.
It can be advantageous to briquette the starting material with the additives and to throw under the action of ammonia in this state or in granular form.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE148332X | 1928-12-06 | ||
| CH141012T | 1929-12-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH148332A true CH148332A (en) | 1931-07-15 |
Family
ID=25713616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH148332D CH148332A (en) | 1928-12-06 | 1929-12-04 | Process for the production of high-percentage cyanamides of the metals of the 2nd group of the periodic table. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH148332A (en) |
-
1929
- 1929-12-04 CH CH148332D patent/CH148332A/en unknown
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