AT43492B - Process for the preparation of nitric acid from calcium nitrate. - Google Patents

Process for the preparation of nitric acid from calcium nitrate.

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Publication number
AT43492B
AT43492B AT43492DA AT43492B AT 43492 B AT43492 B AT 43492B AT 43492D A AT43492D A AT 43492DA AT 43492 B AT43492 B AT 43492B
Authority
AT
Austria
Prior art keywords
nitric acid
calcium nitrate
preparation
thinner
calcium
Prior art date
Application number
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German (de)
Original Assignee
Chemische Werke Vorm Dr Heinri
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
Priority claimed from DE1908217476D external-priority patent/DE217476C/de
Application filed by Chemische Werke Vorm Dr Heinri filed Critical Chemische Werke Vorm Dr Heinri
Application granted granted Critical
Publication of AT43492B publication Critical patent/AT43492B/en

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Description

  

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  Man kann auch von teilweise oder völlig entwässertem Kalksalpeter ausgehen ; in diesem Falle darf dann die zum Lösen verwendete   Salpetersäure noch dünner sein, damit   man nach der Um-   setzung schliesslich doch   zu einer   59% igen Satire   gelangt. 



   Da beim systematischen Auswaschen des Gypses mit immer schwächerer Salpetersäure schliesslich eine verdünnte Säure gewonnen wird, so wird diese als Lösungsmittel tür den entwässerten Kalksalpeter benutzt und man erzielt auf diese Weise kontinuierlich die   Überführung   der dünneren Waschsäuren in solche handelsfähigerer Konzentration, ohne dass man auf Destillation angewiesen ist. Das Schmelzen des Kalksalpeters ist der einzig nötige   Wärmeaufwand.   



   Wie man bei Verwendung von mehr oder    wenigerentwässertem Kalksalpeter dünnere   Salpetersäure zum Lösen verwenden kann, so kommt man bei solchem   Kalksalpeter   auch mit schwächerer und somit billigerer Schwefelsäure aus. 



   Die so gewonnene Salpetersäure enthält ungefähr ebenso wenig feste Substanzen gelöst wie die auf gleiche Weise dargestellten stärkeren Säuren. Ausser sehr wenig Kalksalz enthält sie wenig Magnesiumsalz, wenn der verwendete Kalksalpeter solches enthielt. Bei Verwendung des im Beispiel genannten Kalksalpeters betrug der   Gesamtrückstand   der dort erzielten Salpeter-   säure 1, 3%   von der Salpetersäure, ihr Gypsgehalt war nur 0, 1%. Eine solche Salpetersäure ist für die meisten technischen Zwecke direkt verwendbar.



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  One can also start from partially or completely dehydrated calcium nitrate; in this case, the nitric acid used for dissolving may be even thinner, so that after conversion one finally arrives at a 59% satire.



   Since a dilute acid is finally obtained when the gypsum is systematically washed out with increasingly weaker nitric acid, this is used as a solvent for the dehydrated calcium nitrate and in this way the conversion of the thinner washing acids into a more tradable concentration is achieved without having to rely on distillation is. Melting the calcium nitrate is the only heat required.



   Just as you can use thinner nitric acid for dissolving when using more or less dehydrated calcium nitrate, you can also use weaker and therefore cheaper sulfuric acid with such calcium nitrate.



   The nitric acid obtained in this way contains about as few solids as the stronger acids prepared in the same way. Apart from very little calcium salt, it contains little magnesium salt if the calcium nitrate used contained such. When using the calcium nitrate mentioned in the example, the total residue of the nitric acid obtained there was 1.3% of the nitric acid, its gypsum content was only 0.1%. Such nitric acid can be used directly for most technical purposes.

Claims (1)

PATENT-ANSPRUCH : Verfahren zur Darstellung von Salpetersäure aus Kalksalpeter neben hydratischem Gyps EMI2.1 PATENT CLAIM: Process for the preparation of nitric acid from calcium nitrate in addition to hydrated gypsum EMI2.1
AT43492D 1908-09-07 1909-01-23 Process for the preparation of nitric acid from calcium nitrate. AT43492B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1908217476D DE217476C (en) 1908-09-07

Publications (1)

Publication Number Publication Date
AT43492B true AT43492B (en) 1910-08-10

Family

ID=5830764

Family Applications (1)

Application Number Title Priority Date Filing Date
AT43492D AT43492B (en) 1908-09-07 1909-01-23 Process for the preparation of nitric acid from calcium nitrate.

Country Status (1)

Country Link
AT (1) AT43492B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4408458A1 (en) * 1994-03-12 1995-09-14 Klaus Peter Dipl Ing Flamme Multi-purpose mechanically changeable seat structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4408458A1 (en) * 1994-03-12 1995-09-14 Klaus Peter Dipl Ing Flamme Multi-purpose mechanically changeable seat structure

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