DE374976C - Process for the preparation of alkaline earth sulfides - Google Patents

Process for the preparation of alkaline earth sulfides

Info

Publication number
DE374976C
DE374976C DEL49866D DEL0049866D DE374976C DE 374976 C DE374976 C DE 374976C DE L49866 D DEL49866 D DE L49866D DE L0049866 D DEL0049866 D DE L0049866D DE 374976 C DE374976 C DE 374976C
Authority
DE
Germany
Prior art keywords
alkaline earth
preparation
earth sulfides
heating
rotary kiln
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
DEL49866D
Other languages
German (de)
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Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DEL49866D priority Critical patent/DE374976C/en
Application granted granted Critical
Publication of DE374976C publication Critical patent/DE374976C/en
Expired legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00Sulfur; Compounds thereof
    • C01B17/42Sulfides or polysulfides of magnesium, calcium, strontium, or barium
    • C01B17/44Sulfides or polysulfides of magnesium, calcium, strontium, or barium by reduction of sulfates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)

Description

Verfahren zur Darstellung von Erdalkalisulfiden. Die Reduktion von Sulfaten der Erdalkalien zu Sulfiden ist bekanntlich ein verhältnismäßig schwieriger Prozeß. Eine gewisse Verbesserung wurde gebracht durch Vornahme des Prozesses im Drehofen. Das Gemisch von Erdalkalisulfat und Kohle wandert einer Flamme in einem Rohr entgegen. Hierbei wird aber auch immer nur eine unvollkommene Reduktion erreicht, wahrscheinlich hauptsächlich infolge der Einwirkung der Flammengase und Luft usw. Im Retortenofen fällt dieser Übelstand weg, dafür kommt aber hier beträchtlich größerer Verbrauch an Ofen- und Heizmaterial in Betracht.Process for the preparation of alkaline earth sulfides. The reduction of Sulphates of the alkaline earths to sulphides is known to be relatively difficult Process. Some improvement was made by taking the process in Rotary kiln. The mixture of alkaline earth sulfate and charcoal migrates in a flame Pipe against. Here, however, only an imperfect reduction is achieved, probably mainly due to the action of the flame gases and air, etc. In the retort furnace this drawback does not apply, but there is a considerably greater problem here Consumption of furnace and heating material in consideration.

Es ist nun gelungen, diese Schwierigkeiten dadurch aus dem Wege zu räumen, daß man diesen Prozeß ebenfalls in einem Drehrohrofen vornimmt, der aber statt durch eine Flamme durch Elektrizität geheizt wird, wobei möglichst für Abwesenheit des Luftsauerstoffs gesorgt wird. Die Heizung kann hierbei als Widerstands- , oder Lichtbogenerhitzung eingerichtet sein. In ersterem Falle können besondere Heizkörper angebracht sein. Es kann aber auch die Beschickung als Widerstand benutzt werden. Auch Lichtbogenheizung ist bei diesen Verfahren möglich. Bei Widerstandserhitzung kann statt besonderer Heizungskörper die Beschickung des Drehrohrofens als Heizungswiderstand dienen. Die richtige Leitfähigkeit desselben wird durch die Einhaltung einer entsprechenden Dicke der Materialschicht oder auch durch entsprechenden Zusatz von Kohle erzielt. Entsprechend den Verhältnissen können auch Kombinationen dieser Erhitzungsarten eintreten.It has now been possible to get these difficulties out of the way admit that this process is also carried out in a rotary kiln, but the instead of being heated by a flame by electricity, if possible for absence the oxygen in the air is taken care of. The heater can be used as a resistance, or Arc heating must be set up. In the former case, special radiators can be used to be appropriate. However, the charge can also be used as a resistor. Arc heating is also possible with this method. With resistance heating Instead of special heating elements, the rotary kiln can be charged as a heating resistor to serve. The correct conductivity of the same is achieved by observing an appropriate Thickness of the material layer or achieved by the appropriate addition of carbon. Depending on the circumstances, combinations of these types of heating can also be used enter.

Es empfiehlt sich, auch das Material in einem dem eigentlichen Reduktionsrohr vorgeschalteten Drehrohrofen, der auch mit Flamme geheizt sein kann, eine Vorbehandlung, Trocknung, Vorwärmung der Beschickung vorzunehmen. Hierbei kann das bei der Reduktion entwickelte Kohlenoxyd Verwendung finden.It is advisable to also put the material in the actual reduction tube upstream rotary kiln, which can also be heated with a flame, a pretreatment, To carry out drying, preheating of the load. This can be done with the reduction developed carbon oxide find use.

Claims (1)

PATENT-ANSPRUCH: Verfahren zur Darstellung von Erdalkalisulfiden aus Sulfaten durch Reduktion in Drehrohröfen, dadurch gekennzeichnet, daß hierbei ein elektrisch geheizter Drehrohrofen Verwendung findet.PATENT CLAIM: Process for the preparation of alkaline earth sulfides Sulphates by reduction in rotary kilns, characterized in that here a electrically heated rotary kiln is used.
DEL49866D 1920-02-11 1920-02-11 Process for the preparation of alkaline earth sulfides Expired DE374976C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEL49866D DE374976C (en) 1920-02-11 1920-02-11 Process for the preparation of alkaline earth sulfides

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL49866D DE374976C (en) 1920-02-11 1920-02-11 Process for the preparation of alkaline earth sulfides

Publications (1)

Publication Number Publication Date
DE374976C true DE374976C (en) 1923-05-07

Family

ID=7273189

Family Applications (1)

Application Number Title Priority Date Filing Date
DEL49866D Expired DE374976C (en) 1920-02-11 1920-02-11 Process for the preparation of alkaline earth sulfides

Country Status (1)

Country Link
DE (1) DE374976C (en)

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