DE333305C - Process for the production of calcium hydride - Google Patents

Process for the production of calcium hydride

Info

Publication number
DE333305C
DE333305C DE1920333305D DE333305DD DE333305C DE 333305 C DE333305 C DE 333305C DE 1920333305 D DE1920333305 D DE 1920333305D DE 333305D D DE333305D D DE 333305DD DE 333305 C DE333305 C DE 333305C
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DE
Germany
Prior art keywords
calcium
hydride
production
calcium hydride
hydrogen
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
DE1920333305D
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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.)
KARL KAISER DR
Original Assignee
KARL KAISER 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 KARL KAISER DR filed Critical KARL KAISER DR
Application granted granted Critical
Publication of DE333305C publication Critical patent/DE333305C/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B6/00—Hydrides of metals including fully or partially hydrided metals, alloys or intermetallic compounds ; Compounds containing at least one metal-hydrogen bond, e.g. (GeH3)2S, SiH GeH; Monoborane or diborane; Addition complexes thereof
    • C01B6/04—Hydrides of alkali metals, alkaline earth metals, beryllium or magnesium; Addition complexes thereof

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Description

Verfahren zur Gewinnung von Calciumhydrid. Calciumhydrid wurde bisher ausschließlich in der Weise hergestellt, daß man durch geschmolzenes Calciummetall Wasserstoff leitete. Das Verfahren ist wegen des hohen Preises des Calciums sehr kostspielig. Trotzdem wurde das Hydrid während des Krieges, als es auf den Preis nicht . ankam, zur bequemen Herstellung von Wasserstoff verwendet. Bei billigem Preis ist aber die Verwendbarkeit des Calciumhydrids eine sehr vielseitige, so z. B. für die Überführung geringwertiger flüssiger Fette in wertvolle feste Fette (sogenannte Fetthärtung), für die Hydrierung von Rohpetroleum zwecks Erhöhung der Benzinausbeute, für die Reduktion von Acetaldehyd (aus Karbid) in Äthylalkohol usw. Besonders wichtig ist das Hydrid auch für die Gewinnung von Ammoniak aus dem Stickstoff der Luft. Leitet man nämlich über das erhitzte Hydrid Stickstoff, so entstehen Ammoniak und Calciumnitrid, das mit Wasser wiederum Ammoniak liefert: Der Erfinder hat nun festgestellt, daß man Calciumhydrid auch in der Weise gewinnen kann, daß man über Calciumchlorid bei erhöhter Temperatur Wasserstoff leitet. Es entweicht Chlorwasserstoff und Calciumhydrid bleibt im Reaktionsrohr zurück. Die Zersetzung des Calciumchlorids durch den Wasserstoff beginnt bereits bei etwa 55o°. Die Reaktionsgeschwindigkeit wächst mit steigender Temperatur bis zum Schmelzpunkt des Calciumchlorids (etwa 78o°).Process for the production of calcium hydride. Calcium hydride has been used so far produced exclusively in such a way that one by molten calcium metal Hydrogen headed. The procedure is great because of the high price of calcium expensive. Even so, the hydride became during the war when it was on the price not . arrived, used for the convenient production of hydrogen. With cheap Price is the usability of calcium hydride a very versatile, so z. B. for the conversion of low-quality liquid fats into valuable solid fats (so-called Fat hardening), for the hydrogenation of crude petroleum to increase the gasoline yield, for the reduction of acetaldehyde (from carbide) in ethyl alcohol etc. Particularly important the hydride is also used to extract ammonia from the nitrogen in the air. If you pass nitrogen over the heated hydride, ammonia and Calcium nitride, which in turn supplies ammonia with water: the inventor has now found that calcium hydride can also be obtained by using calcium chloride conducts hydrogen at elevated temperature. Hydrogen chloride and calcium hydride escape remains in the reaction tube. The decomposition of calcium chloride by the hydrogen starts at around 55o °. The speed of reaction grows with increasing Temperature up to the melting point of calcium chloride (about 78o °).

Zur Ausführung des Verfahrens bringt man beispielsweise in ein Rohr aus geeignetem Material, das wegen der hohen Reduktionskraft des entstehenden Calciumhydrids frei von Kieselsäure sein soll, zweckmäßig wasserfreies Calciumchlorid, leitet gut getrockneten Wasserstoff darüber und erhitzt auf 6oo bis 7oo°. Setzt man die Reaktion fort, bis kein Chlorwasserstoff mehr entweicht, so findet man im Reaktionsrohr reines Calciumhydrid.To carry out the process, for example, it is placed in a pipe made of suitable material, because of the high reducing power of the resulting calcium hydride Should be free of silica, expediently anhydrous calcium chloride, conducts well dried hydrogen over it and heated to 600 to 7oo °. If you put the reaction until no more hydrogen chloride escapes, pure one can be found in the reaction tube Calcium hydride.

Der bei der Reaktion als Nebenprodukt entstehende Chlorwasserstoff kann dazu verwendet werden, um aus kohlensaurem Kalk (Kreide, Marmor) oder aus dem bei der Wassereinwirkung auf Calciumnitrid entstehenden Kalk das Ausgangsmaterial, das Calciumchlorid, wieder zu gewinnen. Verwendet man den Chlorwasserstoff zur Zersetzung von Calciumnitrid, so erhält man Ammoniumchlorid, ein ausgezeichnetes Stickstoffdüngemittel, und direkt Calciumchlorid.The hydrogen chloride formed as a by-product in the reaction can be used to make carbonate of lime (chalk, marble) or from the lime formed by the action of water on calcium nitride is the starting material, the calcium chloride to regain. If one uses the hydrogen chloride for the decomposition from calcium nitride, ammonium chloride is obtained, an excellent nitrogen fertilizer, and calcium chloride directly.

Claims (1)

PATENTANSPRUCH: Verfahren zur Gewinnung von Calciumhydrid, dadurch gekennzeichnet, daß man über erhitztes Calciumchlorid Wasserstoff leitet. - PATENT CLAIM: Process for the production of calcium hydride, characterized in that hydrogen is passed over heated calcium chloride. -
DE1920333305D 1920-02-11 1920-02-11 Process for the production of calcium hydride Expired DE333305C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE333305T 1920-02-11

Publications (1)

Publication Number Publication Date
DE333305C true DE333305C (en) 1921-02-22

Family

ID=6208968

Family Applications (1)

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DE1920333305D Expired DE333305C (en) 1920-02-11 1920-02-11 Process for the production of calcium hydride

Country Status (1)

Country Link
DE (1) DE333305C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3383186A (en) * 1963-02-27 1968-05-14 Snam Spa Preparation of sodium and potassium aluminum hydride

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3383186A (en) * 1963-02-27 1968-05-14 Snam Spa Preparation of sodium and potassium aluminum hydride

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