DE374208C - Process for reducing or eliminating the inflammability of absorbent charcoals - Google Patents

Process for reducing or eliminating the inflammability of absorbent charcoals

Info

Publication number
DE374208C
DE374208C DEF50234D DEF0050234D DE374208C DE 374208 C DE374208 C DE 374208C DE F50234 D DEF50234 D DE F50234D DE F0050234 D DEF0050234 D DE F0050234D DE 374208 C DE374208 C DE 374208C
Authority
DE
Germany
Prior art keywords
inflammability
eliminating
reducing
charcoals
absorbent
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
DEF50234D
Other languages
German (de)
Inventor
Dr Wilhelm Lommel
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.)
Bayer AG
Original Assignee
Farbenfabriken Vorm Friedr Bayer and Co
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 Farbenfabriken Vorm Friedr Bayer and Co filed Critical Farbenfabriken Vorm Friedr Bayer and Co
Priority to DEF50234D priority Critical patent/DE374208C/en
Application granted granted Critical
Publication of DE374208C publication Critical patent/DE374208C/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)

Description

Verfahren zur Herabsetzung oder Aufhebung der EntzündungsfähigkeitvonAbsorptionskohlen. Bei der Verwendung von Kohle zu Absorptionszwecken besteht ein Übelstand darin, daß die Kohle sich zuweilen bei der Absorption oder bei der Behandlung zur Entfernung der absorbierten Stoffe entzündet. Es wurde gefunden, daß die Entzündungsfähigkeit der Kohle durch Zugabe nicht oder schwer flüchtiger Säuren wesentlich herabgesetzt oder ganz aufgehoben werden kann. Als besonders geeignet hat sich Phosphorsäure erwiesen. Es genügen sehr kleine Mengen, so daß eine Abnahme der Absorptionsfähigkeit nicht eintritt. Beispiel. Nach dem Verfahren des Patents 29o656 erhältliche Kohle wird mit einer o,5prozentigen Phosphorsäurelösung überschichtet und nach einigem Stehen, gegebenenfalls nachdem die Durchtränkung durch Evakuieren unterstützt wurde, durch Absaugen oder auf andere Weise von der Flüssigkeit getrennt; man kann auch noch mit Wasser nachspülen, ohne die Wirkung aufzuheben. Die Lösung kann nach Ersatz der geringen Menge verbrauchter Phosphorsäure wiederholt Verwendung finden. Nach dem Trocknen kann man eine so behandelte Kohle z. B. auf 6oo ° heilfies Aluminium legen, ohne daß ein Erglühen erfolgt, während das Ausgangsmaterial bei dieser Probe zu einem erheblichen Teil unter Erglühen verbrennt.Process for reducing or eliminating the ignitability of absorbent charcoals. One of the drawbacks of using charcoal for absorption purposes is that the charcoal is sometimes absorbed or treated for removal of the absorbed substances ignites. It was found that the inflammability the coal is significantly reduced by adding non-volatile or poorly volatile acids or can be canceled entirely. Phosphoric acid has proven to be particularly suitable proven. Very small amounts are sufficient, so that there is a decrease in the absorbency does not occur. Example. Coal obtainable by the method of patent 29o656 is covered with a 0.5 percent phosphoric acid solution and after some Standing, if necessary after the impregnation has been supported by evacuation, separated from the liquid by suction or otherwise; One can also rinse with water without negating the effect. The solution can be for replacement the small amount of phosphoric acid consumed can be used repeatedly. To the drying can be a so treated coal z. B. on 6oo ° healing aluminum place without glowing while the starting material is in this sample to a large extent burns under glowing conditions.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herabsetzung oder Aufhebung der Entzündungsfähigkeit von Absorptionskohlen durch Zugabe kleiner Mengen nicht oder schwer flüchtiger Säuren, insbesondere von Phosphorsäure. PATENT CLAIM: Process for reducing or eliminating the inflammability of absorption charcoal by adding small amounts of non-volatile or poorly volatile acids, in particular phosphoric acid.
DEF50234D 1921-09-07 1921-09-07 Process for reducing or eliminating the inflammability of absorbent charcoals Expired DE374208C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEF50234D DE374208C (en) 1921-09-07 1921-09-07 Process for reducing or eliminating the inflammability of absorbent charcoals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF50234D DE374208C (en) 1921-09-07 1921-09-07 Process for reducing or eliminating the inflammability of absorbent charcoals

Publications (1)

Publication Number Publication Date
DE374208C true DE374208C (en) 1923-04-20

Family

ID=7103637

Family Applications (1)

Application Number Title Priority Date Filing Date
DEF50234D Expired DE374208C (en) 1921-09-07 1921-09-07 Process for reducing or eliminating the inflammability of absorbent charcoals

Country Status (1)

Country Link
DE (1) DE374208C (en)

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