DE976820C - Process for the production of a filter material used to trap hydrogen cyanide and its halogen derivatives from the air we breathe - Google Patents

Process for the production of a filter material used to trap hydrogen cyanide and its halogen derivatives from the air we breathe

Info

Publication number
DE976820C
DE976820C DEA19018A DEA0019018A DE976820C DE 976820 C DE976820 C DE 976820C DE A19018 A DEA19018 A DE A19018A DE A0019018 A DEA0019018 A DE A0019018A DE 976820 C DE976820 C DE 976820C
Authority
DE
Germany
Prior art keywords
air
breathe
production
hydrogen cyanide
halogen derivatives
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
DEA19018A
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 DEA19018A priority Critical patent/DE976820C/en
Application granted granted Critical
Publication of DE976820C publication Critical patent/DE976820C/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

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

Description

Verfahren zur Herstellung einer zum Abfangen von Cyanwasserstoff und seinen Halogenderivaten aus der Atemluft dienenden Filtermasse Das Patent 976 8i9 betrifft die Herstellung einer zur Abfangung von Cyanwasserstoff und seinen Halogenderivaten aus der Atemluft bestimmten Filtermasse, die aus mit Schwermetallverbindungen, insbesondere basischen Cu-Verbindungen, imprägnierter Aktivkohle besteht und bei der eine möglichst alkalifreie Aktivkohle mit einer frischen, Ammoniak, basisches Kupfercarbonat, Ammoniumcarbonat und Ammonium- oder Kaliumchromat enthaltenden Lösung getränkt und im Luftstrom auf i2o bis i5o° C getrocknet wird.Process for the production of a filter material used to trap hydrogen cyanide and its halogen derivatives from the air we breathe Patent 976 8i9 relates to the production of a filter compound intended to trap hydrogen cyanide and its halogen derivatives from the air we breathe, made from activated carbon impregnated with heavy metal compounds, in particular basic Cu compounds and in which an activated carbon that is as alkali-free as possible is impregnated with a fresh solution containing ammonia, basic copper carbonate, ammonium carbonate and ammonium or potassium chromate and dried in a stream of air to between 120 and 150 ° C.

Es hat sich nun gezeigt, daß die Abfangleistung der Kohle gegenüber Cyanwasserstoff und seinen Halogenderivaten erheblich dadurch gesteigert werden kann, daß die getränkte Filtermasse in zwei Stufen getrocknet wird; und zwar darf die Temperatur in der ersten Trocknungsstufe i2o° C nicht übersteigen; die zweite Trocknungsstufe dagegen soll zwischen i5o und 200° C liegen. Als günstig hat sich z. B. eine Temperatur von 18o° C erwiesen.It has now been shown that the interception performance compared to the coal Hydrogen cyanide and its halogen derivatives are increased considerably as a result can that the soaked filter mass is dried in two stages; and may the temperature in the first drying stage do not exceed i2o ° C; the second The drying level, on the other hand, should be between 150 and 200 ° C. Has turned out to be cheap z. B. proved a temperature of 180 ° C.

Die neue Art der Trocknung wirkt sich nicht nur auf die Erzielung einer gleichmäßigen und erhöhten Abfangleistung der Filtermasse aus, sondern sie hat darüber hinaus noch den Vorteil einer sicheren Durchführung des Trockenverfahrens.The new type of drying does not only affect the achievement a uniform and increased interception capacity of the filter material, separate them also has the advantage that the drying process can be carried out safely.

Bei der Vortrocknung unterhalb 12o° C entweichen nämlich dieZersetzungaprodukte derTränklösungen, insbesondere Ammoniak, die beim einstufigen Trocknungsverfahren oftmals zum Verbrennen der Kohle Anlaß geben. Dies mag auf den Gehalt von Ammoniak oder die intermediäre Bildung von Ammoniumchromat zurückzuführen sein, welches bekanntlich selbstentzündlich ist.In the pre-drying process below 120 ° C, the decomposition products escape the drinking solutions, in particular ammonia, which is used in the single-stage drying process often cause the coal to burn. This may be due to the ammonia content or the intermediate formation of ammonium chromate, which is known is self-igniting.

Die durch das zweistufige Trocknungsverfahren gegenüber dem einstufigen erzielte Abfangleistung der Filtermasse zeigt eine Steigerung von etwa :2o '/o. Die Filtermasse weist eine ausgezeichnete Lagerfähigkeit auf.The two-stage drying process compared to the one-stage Achieved interception performance of the filter mass shows an increase of about: 2o '/ o. The filter mass has an excellent shelf life.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung einer zur Abfangung von Cyanwasserstoff und seiner Halogenderivate aus der Atemluft bestimmten Filtermasse nach Patent 9768r9, dadurch gekennzeichnet, dali die Trocknung der mit den Imprägnierlösungen getränkten Kohle in zwei Stufen durchgeführt wird, wobei die Temperatur der ersten Stufe unter r2o° C und die der zweiten Stufe zwischen aSo und 2oo° C, vorzugsweise bei r8o° C, gehalten wird.PATENT CLAIM: Process for the production of a for the interception of Hydrogen cyanide and its halogen derivatives from the air we breathe are determined by the filter mass according to patent 9768r9, characterized in that the drying with the impregnation solutions Soaked charcoal is carried out in two stages, the temperature of the first Stage below r2o ° C and that of the second stage between aSo and 200 ° C, preferably at r8o ° C.
DEA19018A 1953-10-22 1953-10-22 Process for the production of a filter material used to trap hydrogen cyanide and its halogen derivatives from the air we breathe Expired DE976820C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA19018A DE976820C (en) 1953-10-22 1953-10-22 Process for the production of a filter material used to trap hydrogen cyanide and its halogen derivatives from the air we breathe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA19018A DE976820C (en) 1953-10-22 1953-10-22 Process for the production of a filter material used to trap hydrogen cyanide and its halogen derivatives from the air we breathe

Publications (1)

Publication Number Publication Date
DE976820C true DE976820C (en) 1964-05-06

Family

ID=6924330

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA19018A Expired DE976820C (en) 1953-10-22 1953-10-22 Process for the production of a filter material used to trap hydrogen cyanide and its halogen derivatives from the air we breathe

Country Status (1)

Country Link
DE (1) DE976820C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2757576A1 (en) * 1977-12-23 1979-06-28 Draegerwerk Ag IMPRAEGNATED CHARCOAL FOR USE AS AN AIR CLEANING AGENT AND METHOD OF MANUFACTURING IT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2757576A1 (en) * 1977-12-23 1979-06-28 Draegerwerk Ag IMPRAEGNATED CHARCOAL FOR USE AS AN AIR CLEANING AGENT AND METHOD OF MANUFACTURING IT

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