DE379026C - Tanning process - Google Patents

Tanning process

Info

Publication number
DE379026C
DE379026C DEE26253D DEE0026253D DE379026C DE 379026 C DE379026 C DE 379026C DE E26253 D DEE26253 D DE E26253D DE E0026253 D DEE0026253 D DE E0026253D DE 379026 C DE379026 C DE 379026C
Authority
DE
Germany
Prior art keywords
tanning process
chlorine
precipitation
acid
water
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
DEE26253D
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.)
ELEKTROCHEMISCHE WERKE GmbH
Original Assignee
ELEKTROCHEMISCHE WERKE GmbH
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 ELEKTROCHEMISCHE WERKE GmbH filed Critical ELEKTROCHEMISCHE WERKE GmbH
Priority to DEE26253D priority Critical patent/DE379026C/en
Application granted granted Critical
Publication of DE379026C publication Critical patent/DE379026C/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
    • C14C3/26—Chemical tanning by organic agents using other organic substances, containing halogen

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

Gerbverfahren. Die bisher hergestellten synthetischen organischen Gerbstoffe gehören der aromatischen Reihe an.Tanning process. The so far produced synthetic organic Tannins belong to the aromatic series.

Es wurde nun gefunden, daß man zu wertvollen gerbendenStoffen derhydroaromatischen Reihe gelangen kann, wenn man Chlor auf Tetrahydronaphthalinsulfonsäuren bei erhöhter Temperatur einwirken läßt.It has now been found that valuable tanning substances can be obtained from hydroaromatic Number can come if you chlorine to tetrahydronaphthalenesulfonic acids at increased Let the temperature act.

Beispiel: In geschmolzene Tetrahydronaphthalin-psulfonsäure leitet man unter allmählich steigender Temperatur so lange Chlor ein, bis man die Temperatur von. ungefähr 18o° erreicht hat. Dann löst man die Schmelze in Wasser auf, stumpft die Säure ziemlich weit ab und gerbt mit dieser Lösung in bekannter Weise. Das Leder ist von vollgriffiger und dem vegetabilischen Leder gleichwertiger Beschaffenheit. Selbstredend läßt sich auch dieser Gerbstoff unter Zusatz von natürlichen, vegetabilischen, anderen synthetischen, organischen oder mineralischen Gerbstoffen verwenden.Example: In molten tetrahydronaphthalene-psulfonic acid conducts chlorine is added while the temperature is gradually increasing, until the temperature is reached from. has reached about 18o °. Then you dissolve the melt in water, blunt the acid wears off quite a bit and tans with this solution in the known manner. The leather has a full-grip texture and is equivalent to vegetable leather. Of course, this tannin can also be used with the addition of natural, vegetable, use other synthetic, organic or mineral tanning agents.

Das Einwirkungsprodukt von Chlor auf Tetrahydronaphthalin-ß-sulfonsäure läßt sich aus seiner wäßrigen Lösung dadurch rein abscheiden, daß man es wiederholt mit gasförmiger Salzsäure als dunkel gefärbtes Öl fällt. Durch Trocknen des Öles im Vakuum über Ätznatron wird schließlich ein asphaltartiger, amorpher Körper mit 16,1 Prozent Chlor und 14,6 Prozent Schwefel gewonnen. Er ist löslich in Wasser, Alkohol, Äther, Azeton, Ameisenester, Chloroform, wenig löslich in Tetrachlorkohlenstoff, Benzol, Tetralin, unlöslich in Petroläther.The product of action of chlorine on tetrahydronaphthalene-ß-sulfonic acid can be separated out in pure form from its aqueous solution by repeating it falls with gaseous hydrochloric acid as a dark colored oil. By drying the oil in a vacuum over caustic soda, an asphalt-like, amorphous body is finally formed 16.1 percent chlorine and 14.6 percent sulfur obtained. It is soluble in water Alcohol, ether, acetone, ant ester, chloroform, slightly soluble in carbon tetrachloride, Benzene, tetralin, insoluble in petroleum ether.

Aus seinen wäßrigen Lösungen läßt er sich durch Kochsalz, Chlorkalium und andere Salze aussalzen.It can be separated from its aqueous solutions by means of table salt and potassium chloride and salt out other salts.

Die wäßrige Lösung zeigt folgende Reaktionen: Bleiazetat ........,. starke Fällung Molybdäns. Ammon. . - Ca-Formiat......... Trübung Ba C12 . . . . . . . . . . . . . starke Fällung Fe C13. . . . . . . . . . . . . durkelolivgrüneFällung Fe S 0....... ..... hellolivgrüne Fällung H2 S 0Q . . . . . . . . . . . . - Na 0 H, 30prozentig CU S 04 . . . . . . . . . . . . grüne Fällung Br-Wasser .........- Salzsaures Anilin .... Fällung Formaldehyd ....... - N H3 . . . . . . . . . . . . . . Aufhellung Ba (0H)2 Wasser .... starke Fällung Aluminiumazetat .... starke Fällung H20, + H2 S 04 ..... geringe Fällung Chromformiat ...... grauviolette Fällung Chromsäure . . . . . . . . schwache Aufhellung Ferrizyankali ....... leichte Trübung MorawskischeReaktion negativ Auf Garanzinestreifen lassen sich folgende Ausfärbungen feststellen: Zr = schwach rötlich-braun, A1 - schwach braun, Cr = schwach braun, Cd - stark dunkelbraun, Bi = stark hellbraun, Pb stark dunkelbraun, Fe = stark rehbraun. 11-6t Anilin gekocht wird aus der chlorierten Säure Salzsäure abgespalten.The aqueous solution shows the following reactions: Lead acetate ........,. heavy precipitation Molybdenum. Ammon. . - Ca formate ......... turbidity Ba C12. . . . . . . . . . . . . heavy precipitation Fe C13. . . . . . . . . . . . . hard olive green precipitate Fe S 0 ....... ..... light olive green precipitate H2 S 0Q. . . . . . . . . . . . - Na 0 H, 30 percent CU S 04. . . . . . . . . . . . green precipitation Br-water .........- Hydrochloric aniline .... precipitation Formaldehyde ....... - N H3. . . . . . . . . . . . . . Lightening Ba (0H) 2 water .... heavy precipitation Aluminum acetate .... heavy precipitation H20, + H2 S 04 ..... low precipitation Chromium formate ...... gray-violet precipitate Chromic acid. . . . . . . . weak brightening Ferrizyankali ....... slight cloudiness Morawskian reaction negative The following colorations can be seen on the guarantee strips: Zr = slightly reddish brown, A1 - light brown, Cr = light brown, Cd - very dark brown, Bi = strong light brown, Pb strong dark brown, Fe = strong fawn. When boiled 11-6t aniline, hydrochloric acid is split off from the chlorinated acid.

Claims (1)

PATENTANSPRUCH: Gerbverfahren, dadurch gekennzeichnet. daß man tierische Häute oder Felle in üblicher Weise mit wäßrigen Lösungen der Einwirkungsprodukte von Chlor auf Tetrahydronaphthalinsulfonsäuren behandelt.PATENT CLAIM: Tanning process, characterized. that one is animal Hides or pelts in the usual way with aqueous solutions of the action products treated by chlorine on tetrahydronaphthalenesulfonic acids.
DEE26253D 1921-02-12 1921-02-12 Tanning process Expired DE379026C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEE26253D DE379026C (en) 1921-02-12 1921-02-12 Tanning process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE26253D DE379026C (en) 1921-02-12 1921-02-12 Tanning process

Publications (1)

Publication Number Publication Date
DE379026C true DE379026C (en) 1923-08-10

Family

ID=7072059

Family Applications (1)

Application Number Title Priority Date Filing Date
DEE26253D Expired DE379026C (en) 1921-02-12 1921-02-12 Tanning process

Country Status (1)

Country Link
DE (1) DE379026C (en)

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