DE386596C - Process for the production of alkali arsenites - Google Patents

Process for the production of alkali arsenites

Info

Publication number
DE386596C
DE386596C DEH85961D DEH0085961D DE386596C DE 386596 C DE386596 C DE 386596C DE H85961 D DEH85961 D DE H85961D DE H0085961 D DEH0085961 D DE H0085961D DE 386596 C DE386596 C DE 386596C
Authority
DE
Germany
Prior art keywords
alkali
arsenites
production
arsenic acid
arsenic
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
DEH85961D
Other languages
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.)
FRITZ HENKEL DR
Original Assignee
FRITZ HENKEL 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 FRITZ HENKEL DR filed Critical FRITZ HENKEL DR
Priority to DEH85961D priority Critical patent/DE386596C/en
Application granted granted Critical
Publication of DE386596C publication Critical patent/DE386596C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G28/00—Compounds of arsenic
    • C01G28/02—Arsenates; Arsenites
    • C01G28/023—Arsenates; Arsenites of ammonium, alkali or alkaline-earth metals or magnesium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Description

Verfahren zur Herstellung von Alkaliarseniten. Gegenstand des vorliegenden Patentes bildet ein Verfahren zur Herstellung von Alkaliarseniten. Die Alkalisalze der arsenigen Säure wurden bisher im großen dadurch hergestellt, daß man die äquivalente Menge arsenige Säure in wässerige Alkalilösungen einbrachte und die Lösung zur Trockne brachte. Diese Lösungen lassen sich aber sehr schwer eindampfen, insbesondere ist die Reduktion von arseniger Säure zu elementarem Arsen in Metallgefäßen praktisch gar nicht zu hindern. Das Gefäßmetall, insbesondere Eisen, reduziert die arsenige Säure in reichlichen Mengen, und es entsteht nicht nur Arsen, sondern auch in reichlicher Menge Arsenwasserstoff, so daß dadurch sich sehr üble Belästigungen für die Arbeiter ergeben.Process for the production of alkali arsenites. Subject of the present Patentes forms a process for the production of alkali arsenites. The alkali salts of arsenous acid have hitherto been largely prepared by using the equivalent Amount of arsenic acid in aqueous alkali solutions and the solution to dryness brought. However, these solutions are very difficult to evaporate, especially is the reduction of arsenic acid to elemental arsenic in metal vessels is practical not to be hindered at all. The vessel metal, especially iron, reduces the arsenic Acid in copious amounts, and not only arsenic is produced, but also in copious amounts Amount of arsine, so that it is a very nuisance for the workers result.

Die Erfinder haben nun gefunden, daß man diese Übelstände völlig vermeiden kann, wenn man die arsenige Säure im Gemisch mit Alkali durch einen rotierenden Ofen oder eine erhitzte Schnecke langsam hindurchpassieren läßt, und dabei die Temperatur so hält, daß die Sublimationsgrenze der arsenigen Säure erreicht wind. Es findet dann eine glatte Vereinigung ohne Reduktion und ohne Entwicklung belästigender Dämpfe statt, und es entsteht ein in kaltem Wasser leicht lösliches Salz, das für die üblichen technischen Zwecke, in denen Alkaliarsenit verwendet wird, (besonders und besser als die bisher bekannten Präparate geeignet ist.The inventors have now found that these inconveniences can be completely avoided can, if you mix the arsenic acid with alkali by a rotating Let the oven or a heated snail pass slowly through it, while keeping the temperature holds so that the limit of sublimation of arsenic acid is reached. It finds then a smooth union with no reduction and no development of nuisance vapors instead, and it creates a salt that is easily soluble in cold water, which is used for the usual technical purposes in which alkali arsenite is used (especially and better than the previously known preparations is suitable.

Claims (1)

PATrNT-ANSPRUCH: Verfahren zur Herstellung von Alkaliarseniten, dadurch gekennzeichnet, daß arsenige Säure im Gemisch mit dem Alkali durch einen rotierenden Ofen oder eine erhitzte Schnecke langsam bei Temperaturen hindurchgeführt werden, die an der Sublimationsgrenze der arsenigen Säure liegen.PATRNT CLAIM: Process for the production of alkali arsenites, thereby characterized in that arsenic acid is mixed with the alkali by a rotating Oven or a heated screw are slowly passed through at temperatures, which are at the sublimation limit of arsenic acid.
DEH85961D 1921-06-25 1921-06-25 Process for the production of alkali arsenites Expired DE386596C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEH85961D DE386596C (en) 1921-06-25 1921-06-25 Process for the production of alkali arsenites

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH85961D DE386596C (en) 1921-06-25 1921-06-25 Process for the production of alkali arsenites

Publications (1)

Publication Number Publication Date
DE386596C true DE386596C (en) 1923-12-13

Family

ID=7164550

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH85961D Expired DE386596C (en) 1921-06-25 1921-06-25 Process for the production of alkali arsenites

Country Status (1)

Country Link
DE (1) DE386596C (en)

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