DE976835C - Process for the production of filter media which absorb hydrogen cyanide and cyanogen chloride - Google Patents

Process for the production of filter media which absorb hydrogen cyanide and cyanogen chloride

Info

Publication number
DE976835C
DE976835C DEA23100A DEA0023100A DE976835C DE 976835 C DE976835 C DE 976835C DE A23100 A DEA23100 A DE A23100A DE A0023100 A DEA0023100 A DE A0023100A DE 976835 C DE976835 C DE 976835C
Authority
DE
Germany
Prior art keywords
filter media
production
hydrogen cyanide
cyanogen chloride
absorb 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
DEA23100A
Other languages
German (de)
Inventor
Andreas A Hauch
Walter Dr Lemcke
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.)
Auergesellschaft GmbH
Original Assignee
Auergesellschaft GmbH
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 Auergesellschaft GmbH filed Critical Auergesellschaft GmbH
Priority to DEA23100A priority Critical patent/DE976835C/en
Application granted granted Critical
Publication of DE976835C publication Critical patent/DE976835C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/30—Active carbon
    • C01B32/312—Preparation
    • C01B32/342—Preparation characterised by non-gaseous activating agents
    • C01B32/348—Metallic compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Description

Verfahren zur Herstellung von Cyanwasserstoff und Chlorcyan absorbierenden Filtermassen Die Erfindung betrifft ein Verfahren zur Herstellung von Cyanwasserstoff und Chlorcyan absorbierenden Filtermassen für die Verwendung in Atemfiltern nach Patent 976 796. Im Hauptpatent ist ein Verfahren zur Herstellung der Filtermasse beschrieben, bei dem Aktivkohle mit einem an sich bekannten Gehalt von etwa 5 bis ioo/o Kupfer einer Behandlung mit ammoniakalischer Chromat- bzw. Ammoniumdichromatlösung unterworfen wird. Die durch die Tränkung entstehende Filtermasse wird anschließend bei Temperaturen zwischen ioo und i8o° C, vorzugsweise i5o° C, getrocknet. Bei der Durchführung des Verfahrens zeigt es sich zuweilen, daß durch die Zersetzung der Ammonium-Chromat-Verbindungen pyrophore Verbindungen entstehen, die eine Selbstentzündung der Masse begünstigen.Process for the production of hydrogen cyanide and cyanogen chloride absorbing filter media The invention relates to a process for the production of hydrogen cyanide and cyanogen chloride absorbing filter media for use in breathing filters according to patent 976 796 known content of about 5 to 100 / o copper is subjected to a treatment with ammoniacal chromate or ammonium dichromate solution. The filter mass resulting from the impregnation is then dried at temperatures between 100 and 180 ° C, preferably 150 ° C. When carrying out the process it is sometimes found that the decomposition of the ammonium-chromate compounds gives rise to pyrophoric compounds which promote self-ignition of the mass.

Dieser Nachteil wird gemäß der Erfindung dadurch abgestellt, daß die Trocknung im Luftstrom durchgeführt und im Zweistufenverfahren bewirkt wird.This disadvantage is eliminated according to the invention in that the Drying carried out in an air stream and effected in a two-stage process.

Auf diese Weise wird die Bildung einer Kupfer-Chromat-Verbindung gefördert, während die thermische Zersetzung des Ammonium-Chromats zum pyrophoren Chromoxyd zurückgedrängt wird. Gleichzeitig wird auch die Filterleistung der Filtermasse erheblich gesteigert.In this way the formation of a copper-chromate compound is promoted, while the thermal decomposition of ammonium chromate to the pyrophoric Chromium oxide is pushed back. At the same time, the filter performance of the filter mass is also increased significantly increased.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Cyanwasserstoff und Chlorcyan absorbierenden Filtermassen nach Patent 976 796, dadurch gekennzeichnet, daß die Trocknung der Filtermasse im Luftstrom in zwei Stufen vorgenommen wird, wobei die Temperatur der ersten Stufe bis zu 12o° C geht und die der zweiten zwischen i2o und i8o° C, vorzugsweise bei iSo° C, liegt.PATENT CLAIM: Process for the production of filter media absorbing hydrogen cyanide and cyanogen chloride according to patent 976 796, characterized in that the filter media is dried in an air stream in two stages, the temperature of the first stage going up to 12o ° C and that of the second between i2o and i8o ° C, preferably iSo ° C.
DEA23100A 1955-07-22 1955-07-22 Process for the production of filter media which absorb hydrogen cyanide and cyanogen chloride Expired DE976835C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA23100A DE976835C (en) 1955-07-22 1955-07-22 Process for the production of filter media which absorb hydrogen cyanide and cyanogen chloride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA23100A DE976835C (en) 1955-07-22 1955-07-22 Process for the production of filter media which absorb hydrogen cyanide and cyanogen chloride

Publications (1)

Publication Number Publication Date
DE976835C true DE976835C (en) 1964-06-04

Family

ID=6925352

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA23100A Expired DE976835C (en) 1955-07-22 1955-07-22 Process for the production of filter media which absorb hydrogen cyanide and cyanogen chloride

Country Status (1)

Country Link
DE (1) DE976835C (en)

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