AT34818B - Filter paper for filtering off light-colored and light-sensitive precipitates. - Google Patents

Filter paper for filtering off light-colored and light-sensitive precipitates.

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Publication number
AT34818B
AT34818B AT34818DA AT34818B AT 34818 B AT34818 B AT 34818B AT 34818D A AT34818D A AT 34818DA AT 34818 B AT34818 B AT 34818B
Authority
AT
Austria
Prior art keywords
light
filter paper
colored
precipitates
filtering
Prior art date
Application number
Other languages
German (de)
Original Assignee
Chem Fab Tlen Registrierte Gen
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 Chem Fab Tlen Registrierte Gen filed Critical Chem Fab Tlen Registrierte Gen
Application granted granted Critical
Publication of AT34818B publication Critical patent/AT34818B/en

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  • Optical Filters (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Filtrierpapier zum Abfiltrieren   hellfarbiger   und lichtempfindlicher Niederschläge. 



   In der chemischen Analyse ist die Entfernung des abfiltrierten Niederschlages vom Filter oft mit Schwierigkeiten verbunden, da der meistens weiss oder hell gefärbte Niederschlag sich vom Filterpapier, das gewöhnlich einen weissen, immer aber einen hellen Farbton hat, nur wenig abhebt. Ferner ist in Fällen, in welchen der abgeschiedene Niederschlag vom Lichte zersetzt wird, die Filtration mittels der gebräuchlichen Filter und darauffolgenden Behandlung immer mit einer teilweisen Zersetzung des betreffenden Stosses verbunden. 



     Die oben erwähnten Ubetstände werden   nun völlig vermieden, wenn vorliegender Erfindung   gemäss   zur Filtration ein Filterpapier verwendet wird,   welchem mit einem   gegen   die Flüssigkeit   
 EMI1.1 
 chemischwirkendeLichtstrahlenabsorbieren. 



   Die Wahl der Farbstoffe   muss   entsprechend der Natur des Niederschlages und der zu   tiltrierenden Flüssigkeit   so gewählt werden, dass der Farbstoff nicht von der   Flüssigkeit   gelöst   oder zerstört wird. Da   eine grosse Anzahl von Farbstoffen bekannt ist. die in Wasser oder in alkoholischen oder   ätherischen     Flüssigkeiten   unlöslich sind, desgleichen solche, die entweder 
 EMI1.2 
 besitzen, so ist die Wahl eines entsprechenden Farbstoffes an sich nicht schwierig. Beispielsweise hat sich die Verwendung von mit Anilinschwarz   gefärbtem   Filterpapier in vielen Fällen   geeignet erwiesen. 



  PATENT-ANSPR1'CHE :   
 EMI1.3 
 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Filter paper for filtering off light-colored and light-sensitive precipitates.



   In chemical analysis, the removal of the filtered precipitate from the filter is often associated with difficulties, since the mostly white or light colored precipitate stands out only slightly from the filter paper, which is usually white but always light in color. Furthermore, in cases in which the deposited precipitate is decomposed by the light, the filtration by means of the customary filters and subsequent treatment is always associated with a partial decomposition of the relevant impact.



     The above-mentioned Ubetstands are now completely avoided if, according to the present invention, a filter paper is used for the filtration, which with a against the liquid
 EMI1.1
 absorb chemically acting light rays.



   The choice of dyes must be chosen according to the nature of the precipitate and the liquid to be filtered so that the dye is not dissolved or destroyed by the liquid. As a large number of dyes are known. which are insoluble in water or in alcoholic or essential liquids, likewise those which either
 EMI1.2
 own, the choice of an appropriate dye is not difficult per se. For example, the use of filter paper colored with aniline black has proven suitable in many cases.



  PATENT CLAIMS:
 EMI1.3
 

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

2. Filtrierpapier nach Anspruch 1. dadurch gekennzeichnet, dass zur Imprägnierung Farbstoffe verwendet werden, welche fchemisch wirkende Lichtstrahlen absorbieren. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. 2. Filter paper according to claim 1, characterized in that dyes are used for the impregnation which absorb chemically acting light rays. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT34818D 1906-12-31 1906-12-31 Filter paper for filtering off light-colored and light-sensitive precipitates. AT34818B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT34818T 1906-12-31

Publications (1)

Publication Number Publication Date
AT34818B true AT34818B (en) 1908-10-26

Family

ID=3551116

Family Applications (1)

Application Number Title Priority Date Filing Date
AT34818D AT34818B (en) 1906-12-31 1906-12-31 Filter paper for filtering off light-colored and light-sensitive precipitates.

Country Status (1)

Country Link
AT (1) AT34818B (en)

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