DE384562C - Process for the production of alkali hydroxides and carbonates - Google Patents

Process for the production of alkali hydroxides and carbonates

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Publication number
DE384562C
DE384562C DEW60866D DEW0060866D DE384562C DE 384562 C DE384562 C DE 384562C DE W60866 D DEW60866 D DE W60866D DE W0060866 D DEW0060866 D DE W0060866D DE 384562 C DE384562 C DE 384562C
Authority
DE
Germany
Prior art keywords
production
carbonates
alkali
sulfate
alkali hydroxides
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
DEW60866D
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German (de)
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.)
ADOLF WIPFLER DR
Original Assignee
ADOLF WIPFLER DR
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 ADOLF WIPFLER DR filed Critical ADOLF WIPFLER DR
Priority to DEW60866D priority Critical patent/DE384562C/en
Application granted granted Critical
Publication of DE384562C publication Critical patent/DE384562C/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D1/00—Oxides or hydroxides of sodium, potassium or alkali metals in general
    • C01D1/04—Hydroxides
    • C01D1/26—Preparation from or via cyano compounds, e.g. cyanides, cyanamides

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Description

Verfahren zur Herstellung von Alkalihydroxyden und -carbonaten. Es ist bereits bekannt, Soda und Ätznatron durch Umsetzung von Calciumcyanamid mit Natriumsulfat und Verkochen der so erhaltenen \Tatriumcyanamidlaugen zu gewinnen. Diese Verfahren konnten jedoch keinen Eingang in die Praxis finden, weil atriumsulfat neuerdings zu einem gesuchten Produkt geworden ist.Process for the production of alkali hydroxides and carbonates. It is already known to use soda and caustic soda by reacting calcium cyanamide Obtain sodium sulfate and boiling the \ Tatriumcyanamidlaugen thus obtained. However, these methods could not find their way into practice because atrium sulfate has recently become a sought-after product.

Eine bessere Zukunft ist dem obigen Verfahren erst dann beschieden, wenn es gelingt, (las teure und schwer erhältliche Natriumsulfat durch das jederzeit in beliebiger Menge verfügbare Natriumchlorid zu ersetzen.A better future is only granted to the above procedure, if it succeeds, (read expensive and difficult to obtain sodium sulfate through at any time to replace available sodium chloride in any amount.

Es wurde nun gefunden, daß sich dieses Ziel auf .indirektem Wege erreichen läßt. Es ist bereits vorgeschlagen worden, das bei der Verkochung der Natriumcyanamid'laugen frei werdende Ammoniak unter Einleiten von Kohlendioxyd mit Gips umzusetzen, um Ammonittmsulfat zu erhalten. Anderseits aber ist es möglich, aus schwefelsaurem-Ammoniak durch Kochen mit Natriumchlorid sowohl Natriumsulfat als auch Ammoniumchlorid zu gewinnen, zwei Produkte, die sich durch fraktionierte Kristallisation leicht trennen lassen. Somit ist es durch Kombination an sich bekannter Reaktionen möglich, aus den Naturprodukten Kalk, Kohle, Steinsalz und Stickstoff Ätznatron bzw. Soda zu gewinnen, unter alleiniger Nebenerzeugung des hochwertigen Ammoniumchlorids. Die Umsetzung kann in gleicher Weise auch mittels Chlorkaliums erfolgen.It has now been found that this goal can be achieved indirectly leaves. It has already been suggested that when the sodium cyanamide liquors are boiled to react released ammonia with the introduction of carbon dioxide with gypsum in order to To obtain ammonite sulfate. On the other hand, however, it is possible from sulfuric acid ammonia adding both sodium sulfate and ammonium chloride by boiling with sodium chloride win, two products that easily separate through fractional crystallization permit. Thus, by combining reactions known per se, it is possible to select from add caustic soda or soda to the natural products lime, coal, rock salt and nitrogen win, with the sole by-product of the high-quality ammonium chloride. the Reaction can also take place in the same way using potassium chloride.

Das neue`Verfahren zur Gewinnung von Ätznatron bzw. Soda aus Calciumcarbid und Steinsalz besitzt gegenüber der Chloralkalielektrolyse vor allem den enormen Vorteil der wesentlichen Verbilligung der Einrichtungs-und Betriebskosten; alsdann fehlt das unangenehme Nebenprodukt Chlorgas, dessen Verwertung im Großbetrieb immer erheblichere Schwierigkeiten bereitet, da der Bedarf an festem Chlorkalk dauernd abnimmt. Somit stellt das neue Verfahren einen erheblichen gewerblichen Fortschritt dar.The new process for the production of caustic soda or soda from calcium carbide and rock salt has, compared to chlor-alkali electrolysis, above all the enormous Advantage of the substantial reduction in installation and operating costs; then the unpleasant by-product chlorine gas, which is always used in large-scale operations, is missing causes more serious difficulties, since the need for solid chlorinated lime is constant decreases. Thus, the new process represents a significant industrial advance represent.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Alkalihydroxyden und -carbonaten, dadurch gekennzeichnet, daß Calciumcyanamid mit Alkalisulfat in Calciumsulfat und Alkalicyanamid umgesetzt wird, daß dieses unter Bildung von Ätzalkali bzw. Carbonat und Ammoniak gespalten, letzteres mit Kohlensäure und Calciumsulfat zu Ammonsulfat umgesetzt und schließlich dieses mit Hilfe von Chlornatrium in das zur Umwandlung des Calciumcyanamids erforderliche Alkalisulfat überführt wird. PATENT CLAIM: A process for the production of alkali hydroxides and carbonates, characterized in that calcium cyanamide is reacted with alkali metal sulfate to form calcium sulfate and alkali metal cyanamide, that this is cleaved to form caustic alkali or carbonate and ammonia, the latter is reacted with carbonic acid and calcium sulfate to form ammonium sulfate and finally this with With the help of sodium chloride, it is converted into the alkali sulphate required to convert the calcium cyanamide.
DEW60866D 1922-03-30 1922-03-30 Process for the production of alkali hydroxides and carbonates Expired DE384562C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEW60866D DE384562C (en) 1922-03-30 1922-03-30 Process for the production of alkali hydroxides and carbonates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW60866D DE384562C (en) 1922-03-30 1922-03-30 Process for the production of alkali hydroxides and carbonates

Publications (1)

Publication Number Publication Date
DE384562C true DE384562C (en) 1923-11-03

Family

ID=7606133

Family Applications (1)

Application Number Title Priority Date Filing Date
DEW60866D Expired DE384562C (en) 1922-03-30 1922-03-30 Process for the production of alkali hydroxides and carbonates

Country Status (1)

Country Link
DE (1) DE384562C (en)

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