BE357973A - - Google Patents

Info

Publication number
BE357973A
BE357973A BE357973A BE357973A BE357973A BE 357973 A BE357973 A BE 357973A BE 357973 A BE357973 A BE 357973A BE 357973 A BE357973 A BE 357973A BE 357973 A BE357973 A BE 357973A
Authority
BE
Belgium
Prior art keywords
lye
organic substances
soiled
organic
alkaline
Prior art date
Application number
BE357973A
Other languages
French (fr)
Original Assignee
I G Farbenindustrie Ag Soc
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 I G Farbenindustrie Ag Soc filed Critical I G Farbenindustrie Ag Soc
Publication of BE357973A publication Critical patent/BE357973A/fr

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B11/00Oxides or oxyacids of halogens; Salts thereof
    • C01B11/04Hypochlorous acid
    • C01B11/06Hypochlorites
    • C01B11/062Hypochlorites of alkali metals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Detergent Compositions (AREA)

Description

       

   <Desc/Clms Page number 1> 
 



    "Procéd   pour l'utilisation de lessives résiduaires alcalines." 
Dans de nombreuses branches de l'industrie et en particulier dans l'industrie de la soie artificielle, 

 <Desc/Clms Page number 2> 

 on obtient des lessives alcalines qui sont souillées par des matières organiques et qui sont rendues   @   lisables par une opération de purification. 



   Il a été découvert que les lessives résiduaires alc calmes souillées par des matières organiques peuvent recevoir une nouvelle application lorsqu'on y introduit à froid du   chlor4gazeux.   On produit ainsi deux résultats: les substances organiques sont oxydées pour donner de l' acide carbonique et de l'eau, l'acide carbonique sechap- pant pour la plus grande partie et ne se combinant que dans une mesure minime à la lessive pour former du car- bonate alcalin; en même temps, l'hydroxyde d'alcali for- me avec le chlore de l'hypochlorite et l'on obtient, éventuellement après filtration des matières solides précipitées, une lessive d'hypochlorite alcalin qui ne contient plus d'impuretés organiques. 



    EXEMPLE:   
Dans une lessive résiduaire de soude caustique provenant de l'industrie de la soie artificielle et con- tenant, par litre, 200 gr. d'hydroxyde de sodium et 18 gr. de substance organique, on fait passer, avec re- froidissement, du chlore   jusqu'à   ce qu'il se trouve encore dans la lessive 10 gr. d'alcali libre par litre. 



  On obtient ainsi une solution d'hypochlorite de sodium 

 <Desc/Clms Page number 3> 

 qui contient 150 gr. de chlore actif par litre et est exempte   d'impuretés   organiques.



   <Desc / Clms Page number 1>
 



    "Procedure for the use of alkaline waste liquors."
In many branches of industry and in particular in the artificial silk industry,

 <Desc / Clms Page number 2>

 alkaline lyes are obtained which are soiled with organic matter and which are made readable by a purification operation.



   It has been found that still alkaline waste liquors soiled with organic matter can be re-applied when cold chlorinated gas is introduced into it. Two results are thus produced: the organic substances are oxidized to give carbonic acid and water, the carbonic acid drying for the most part and combining only to a minimal extent with the lye to form alkali carbonate; at the same time, the alkali hydroxide forms hypochlorite with the chlorine and, optionally after filtration of the precipitated solids, an alkaline hypochlorite lye is obtained which no longer contains organic impurities.



    EXAMPLE:
In a residual caustic soda lye from the artificial silk industry and containing, per liter, 200 gr. of sodium hydroxide and 18 gr. of organic substance is passed, with cooling, chlorine until it is still in the 10 gr. of free alkali per liter.



  This gives a solution of sodium hypochlorite

 <Desc / Clms Page number 3>

 which contains 150 gr. of active chlorine per liter and is free from organic impurities.


    

Claims (1)

RESUME : Procédé pour l'utilisation de lessives alcalines souillées par des substances organiques, caractérisé en ce qu'en faisant passer dans la lessive du chlore on élimine les substances organiques et on prépare en même temps une solution pure d'hypochlorite de sodium. ABSTRACT : Process for the use of alkaline detergents soiled with organic substances, characterized in that by passing chlorine through the lye, the organic substances are removed and at the same time a pure solution of sodium hypochlorite is prepared.
BE357973A 1928-02-11 1929-02-06 BE357973A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE669304X 1928-02-11

Publications (1)

Publication Number Publication Date
BE357973A true BE357973A (en) 1929-03-30

Family

ID=6590159

Family Applications (1)

Application Number Title Priority Date Filing Date
BE357973A BE357973A (en) 1928-02-11 1929-02-06

Country Status (2)

Country Link
BE (1) BE357973A (en)
FR (1) FR669304A (en)

Also Published As

Publication number Publication date
FR669304A (en) 1929-11-14

Similar Documents

Publication Publication Date Title
BE357973A (en)
US1819233A (en) Preparation of pentosans
Baldwin Uses of chlorine
DE722259C (en) Manufacture of alkali bromides
GB446662A (en) Improvements in or relating to the purification of water
SU4561A1 (en) The method of obtaining enriched solutions of iodide metals from highly dilute solutions of them
Higgins The Evolution of Bleaching. III.—Materials Used
FR2583078A1 (en) Process for peroxide bleaching of pulps containing cellulose
DE704880C (en) Process for the production of bleached green soaps, soft soaps or potash soaps
GB191409975A (en) Process of Manufacturing Pure Indanthrene-dyestuffs.
DE2208156C3 (en) Process for the preparation of aniline- (4-azo-4) -naphthylamine-1
DE1543352C (en) Process for making chini zarin
BE449235A (en)
DE905011C (en) Process for increasing the effect of oxygen bleaching agents
SU47289A1 (en) Method for producing freeze-dried iodine
DE643105C (en) Process for the production of potash
PL4741B1 (en) The method of cleaning oils and fats is ordinary soda.
GB371454A (en) Improvements in and relating to cleansing compositions especially for toilet use
GB472754A (en) Process for purifying caustic-soda lyes
BE397079A (en)
BE342017A (en)
CH189877A (en) Process for the production of light soap using sulphite cellulose waste liquor.
CH233367A (en) Process for the preparation of an N-sulfonylurea.
GB506875A (en) Two-stage process for decomposing plants containing silicon, especially grain straw, to form highly refined cellulose
GB487192A (en) An improved process for the treatment of hemp