DE448911C - Process for tanning animal skins - Google Patents

Process for tanning animal skins

Info

Publication number
DE448911C
DE448911C DEH91315D DEH0091315D DE448911C DE 448911 C DE448911 C DE 448911C DE H91315 D DEH91315 D DE H91315D DE H0091315 D DEH0091315 D DE H0091315D DE 448911 C DE448911 C DE 448911C
Authority
DE
Germany
Prior art keywords
tanning
tanning animal
animal skins
waste liquor
esterified
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
DEH91315D
Other languages
German (de)
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.)
RIEBECKSCHE MONTANWERKE AG
Original Assignee
RIEBECKSCHE MONTANWERKE AG
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 RIEBECKSCHE MONTANWERKE AG filed Critical RIEBECKSCHE MONTANWERKE AG
Priority to DEH91315D priority Critical patent/DE448911C/en
Application granted granted Critical
Publication of DE448911C publication Critical patent/DE448911C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
    • C14C3/00—Tanning; Compositions for tanning
    • C14C3/02—Chemical tanning
    • C14C3/08—Chemical tanning by organic agents
    • C14C3/24—Chemical tanning by organic agents using lignin derivatives, e.g. sulfate liquor

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Description

Verfahren zum Gerben von tierischen Häuten. Die Erfindung betrifft eine weitere Ausbilc-lung des Gerbverfahrens nach Patent .123 096. welches darin besteht, daß man mit aromatischen Sulfosäuren veresterte Sulfitablauge, gegebenenfalls in Mischung mit anderen synthetischen oder natürlichen Gerbstoffen, auf die Hautblößen zur Einwirkung bringt. Es hat sich nun gezeigt, und darin besteht die Erfindung, daß man zum Gerben mit gutem Erfolge auch mit aromatischen Sulfosäuren veresterte Ligninsulfosäure, die aus der Sulfitcelluloseablauge abgetrennt worden ist, vorzüglich verwenden kann.Process for tanning animal hides. The invention relates to a further development of the tanning process according to patent .123 096. which consists in the fact that sulphite waste liquor esterified with aromatic sulphonic acids, optionally in a mixture with other synthetic or natural tanning agents, is applied to the hide. It has now been shown, and therein lies the invention, that lignosulfonic acid esterified with aromatic sulfonic acids, which has been separated from the sulfite cellulose waste liquor, can also be used with good results for tanning.

Beispielsweise kann man die Sulfitablauge mit Säuren oder Salzen, wie Natriumsulfat, behandeln. Hierdurch wird die Ligninsulfosäure gefällt. Diese wird dann unmittelbar ve i-estert.For example, the sulphite liquor can be mixed with acids or salts, like sodium sulfate. This precipitates the lignin sulfonic acid. These is then i-esterified immediately.

Beispiel. loo kg @ulftcelluloseablauge werden mit einer wäßrigen Lösung von Chlorbarium so lange versetzt, bis kein -Niederschlag mehr entsteht. Der -Niederschlag wird abfiltriert und mit Schwefelsäure in Lösung gebracht. Die Lösung wird dann von dem gebildeten Bariumsulfat getrennt und alsdann mit p-Toluoisulfosäure verestert. Diese Veresterung erfolgt dadurch, daß die Ligninsulfosäure mit äquivalenten Mengen p-Toluolsulfochlorid in alkalischer Lösung bei Zimmertemperatur behandelt wird. Man erwärmt dann noch einige Stunden auf dem Wasserbade, bis eine vollständige Umsetzung stattgefunden hat.Example. 100 kg @ulftcellulose waste liquor are mixed with an aqueous solution of chlorine barium until there is no more precipitate. The precipitation is filtered off and brought into solution with sulfuric acid. The solution will then separated from the barium sulfate formed and then esterified with p-toluenesulfonic acid. This esterification takes place in that the lignin sulfonic acid with equivalent amounts p-Toluenesulfochloride is treated in alkaline solution at room temperature. The mixture is then heated on the water bath for a few hours until the reaction is complete has taken place.

Es entsteht ein brauner, fester Körper, der in Wasser leicht, im organischen Lösungsmittel unlöslich ist und sehr gute leimfällende Eigenschaften zeigt.The result is a brown, solid body that is easy in water, in organic Solvent is insoluble and shows very good glue-precipitating properties.

Claims (1)

l'ATENTA NSPuuCll Abänderung des durch Patent .423 o96 geschützten Verfahrens zum Gerben von tierischen Häuten, darin bestehend, daß man hier die durch Veresterung von aus der Sulfitcelluloseablauge abgeschiedener Ligninsulfosäure mit aromatischen Sulfosäuren erhältlichen Produkte auf die Hautblößen zur Einwirkung bringt.l'ATENTA NSPuuCll modification of that protected by patent .423 o96 Process for tanning animal hides, consisting in the fact that the through here Esterification of lignosulphonic acid separated from the sulphite cellulose waste liquor with aromatic sulfonic acids available on the skin to act brings.
DEH91315D 1922-10-03 1922-10-03 Process for tanning animal skins Expired DE448911C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEH91315D DE448911C (en) 1922-10-03 1922-10-03 Process for tanning animal skins

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH91315D DE448911C (en) 1922-10-03 1922-10-03 Process for tanning animal skins

Publications (1)

Publication Number Publication Date
DE448911C true DE448911C (en) 1927-08-31

Family

ID=7166134

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH91315D Expired DE448911C (en) 1922-10-03 1922-10-03 Process for tanning animal skins

Country Status (1)

Country Link
DE (1) DE448911C (en)

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