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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B11/00—Oxides or oxyacids of halogens; Salts thereof
- C01B11/04—Hypochlorous acid
- C01B11/06—Hypochlorites
- C01B11/062—Hypochlorites 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)
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) |
-
1929
- 1929-02-06 BE BE357973A patent/BE357973A/fr unknown
- 1929-02-07 FR FR669304D patent/FR669304A/en not_active Expired
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 |