DE660936C - Process for the production of a dust-free, non-corrosive, granular calcium cyanamide - Google Patents

Process for the production of a dust-free, non-corrosive, granular calcium cyanamide

Info

Publication number
DE660936C
DE660936C DEI39537D DEI0039537D DE660936C DE 660936 C DE660936 C DE 660936C DE I39537 D DEI39537 D DE I39537D DE I0039537 D DEI0039537 D DE I0039537D DE 660936 C DE660936 C DE 660936C
Authority
DE
Germany
Prior art keywords
calcium cyanamide
free
dust
corrosive
production
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
DEI39537D
Other languages
German (de)
Inventor
Dr Guenther Hamprecht
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie 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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEI39537D priority Critical patent/DE660936C/en
Application granted granted Critical
Publication of DE660936C publication Critical patent/DE660936C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05CNITROGENOUS FERTILISERS
    • C05C7/00Fertilisers containing calcium or other cyanamides
    • C05C7/02Granulation; Pelletisation; Degassing; Hydrating; Hardening; Stabilisation; Oiling
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05BPHOSPHATIC FERTILISERS
    • C05B3/00Fertilisers based essentially on di-calcium phosphate

Description

Verfahren zur Herstellung eines staubfreien, nicht ätzenden, körnigen Kalkstickstoffs Das Patent 650 4.83 hat ein Verfahren zur Herstellung eines 'staubfreien, nichtätzenden Kalkstickstoffs zum Gegenstand, nach dem mim Kalkstickstoff beliebiger Herkunft mit Ammonsalze;n ;in fester Form ohne bes,ond@eren Wasserzusatz, gegebenenfalls hei erhöhter, jedoch i5o° nicht übersteigender Temperatur, innig vermischt, so daß mindestens ein wesentlicher Teil des im Kalkstickstoff enthaltenen .Ätzkalks .neutralisiert wird. Im Falle der Anwendung von A,mm@onnitrat als Bjehandlungsmittel erhält man dabei den Kalkstickstoff nicht nur in staubfreiem und jnichtätz@eiidem Zustand, sondern auch in gekörnter -und daher leicht streubarer Form.Process for the production of a dust-free, non-corrosive, granular calcium cyanamide The patent 650 4.83 relates to a process for the production of a dust-free, non-corrosive calcium cyanamide, according to which calcium cyanamide of any origin with ammonium salts; n; in solid form without any special water addition intimately mixed, if necessary at an elevated temperature, but not exceeding 150 °, so that at least a substantial part of the quick lime contained in the calcium cyanamide is neutralized. If ammonium nitrate is used as the treatment agent, the calcium cyanamide is obtained not only in a dust-free and non-etching state, but also in a granular form, which is therefore easy to spread.

Es wurde nun gefunden, daß dieses Verfahren auch geeignet ist, einen Kalkstickstoff, der bereits in .an sich bekannter Weise zwecks teilweiser 'Neutralisation des freien Kalks mit fester Phosphorsäure behandelt worden ist, noch Weiter wesentlich zu verbessern. Durch die :bekannte Einwirkung von Phosphorsäure auf ,Kalkstickstoff gelingt es zwar, den Kalkstickstoff .zu entätziem und zu entstauben, aber das li:ehandelte Produkt weist immer noch eime pulverige Beschaffenheit auf. Durch die erfindtmg.sgem,äße Behandlung mit Amm,oin,sialzen in fester Form gelingt ies nun, den mit Phosphorsäure vorbehandelten Kalkstickstoff saufeinfache Weise in körniger, leicht streubarer, insbesondere für das Streusem mit Maschinen gut geeigneter Form zu lerhalten.It has now been found that this method is also suitable for a Calcium cyanamide, which is already known in a way for the purpose of partial neutralization of the free lime has been treated with solid phosphoric acid, still further essential to improve. Due to the: well-known effects of phosphoric acid on calcium cyanamide It is possible to de-etch and remove dust from the calcium cyanamide, but it did Product still has a powdery texture. Through the erfindtmg.sgem, ate Treatment with amm, oin, salty salts in solid form is now successful, that with phosphoric acid pretreated calcium cyanamide in a very easy way in a granular, easily spreadable, especially suitable for spreading with machines.

Ähnlich wie bei dem Verfahren gemäß dem Hauptpatent wird auch bei dem vorliegenden Verfahren die gewünschte Wirkung mit ieü#4em verhältnismäßig geringen Aufwand an Zusatzstoff erzielt, denn man erhält .entätzte, nichtstaubende und schön gekörnte Erzeugnisse ;bereits mit so geringen Mengen dien Zusatzstoffe, ,daß der mit ihnen fertigbehandelte Kalkstickstoff immer noch nichtneutralisierten Ätzkalk enthält.Similar to the method according to the main patent is also used in the present method the desired effect with ieü # 4em relatively low Expenditure on additive achieved, because you get .decorated, non-dusting and beautiful granular products; additives are already used in such small quantities that the calcium cyanamide that was finished with them still not neutralized quick lime contains.

Ausführungsbeispiel i oo kg Kalkstickstoff mit z i % Stickstoff in Form von Calciumcyanamid und 250/6 freiem Kalk (Ca, O) werden mit z o kg kristallisierter, fein gemahlener Phosphorsäure verrieben. Nach Bindluig der Phosphorsäure wird oder l,lksfäckstöff mit ao kg festem Ammonnitrat vermischt und durch einen ;auf etwa 1 oo° geheizten Drehofen geschickt. E'5 wer dien hierbei 135 kg eines vollkomt`,, staubfreä,en, gut gekörnten Prodiukt@es, einem Korndlurchmesser von mehrerejl metern erl:jalten, das z 5,6 % Stickstoff Cyanamid, z,6% Stickstoff als Nitrat und ' 10,7% P.,05 enthält.Exemplary embodiment 100 kg of calcium cyanamide with 10% nitrogen in the form of calcium cyanamide and 250/6 free lime (Ca, O) are triturated with 10 kg of crystallized, finely ground phosphoric acid. After binding the phosphoric acid, or lksfackstöff is mixed with ao kg of solid ammonium nitrate and sent through a rotary kiln heated to about 100 °. E'5 who serve 135 kg of a perfectly dust-free, well-grained product @ es, a grain diameter of severaljl meters Erl: Jalten, the z 5.6% nitrogen Cyanamide, containing 6% nitrogen as nitrate and 10.7% P., 05.

Claims (1)

PATEN TAINS1'RUC11: Weitere Ausbildung des durch das Patent 650483 ,geschützten Verfahrens, dadurch gekennzeichnet, daB hier ein Kalkstickstoff verarbeitet wird, der in an sich bekannter Weise zwecks teilweiser Neutralisierung des darin enthaltenen Ätzkalks mit fester Phosphorsäure behandelt worden äst.PATEN TAINS1'RUC11: Further development of the process protected by patent 650483 , characterized in that a calcium cyanamide is processed here, which has been treated with solid phosphoric acid in a manner known per se for the purpose of partial neutralization of the quick lime contained therein.
DEI39537D 1929-10-12 1929-10-12 Process for the production of a dust-free, non-corrosive, granular calcium cyanamide Expired DE660936C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI39537D DE660936C (en) 1929-10-12 1929-10-12 Process for the production of a dust-free, non-corrosive, granular calcium cyanamide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI39537D DE660936C (en) 1929-10-12 1929-10-12 Process for the production of a dust-free, non-corrosive, granular calcium cyanamide

Publications (1)

Publication Number Publication Date
DE660936C true DE660936C (en) 1938-06-08

Family

ID=7190075

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI39537D Expired DE660936C (en) 1929-10-12 1929-10-12 Process for the production of a dust-free, non-corrosive, granular calcium cyanamide

Country Status (1)

Country Link
DE (1) DE660936C (en)

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