CH112326A - Process for the preparation of a tanning agent. - Google Patents

Process for the preparation of a tanning agent.

Info

Publication number
CH112326A
CH112326A CH112326DA CH112326A CH 112326 A CH112326 A CH 112326A CH 112326D A CH112326D A CH 112326DA CH 112326 A CH112326 A CH 112326A
Authority
CH
Switzerland
Prior art keywords
preparation
tanning agent
tanning
solution
acid
Prior art date
Application number
Other languages
German (de)
Inventor
Farbwerke Vorm Meiste Bruening
Original Assignee
Hoechst 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 Hoechst Ag filed Critical Hoechst Ag
Publication of CH112326A publication Critical patent/CH112326A/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G16/00Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00
    • C08G16/02Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes
    • C08G16/0212Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes with acyclic or carbocyclic organic compounds
    • C08G16/0218Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes with acyclic or carbocyclic organic compounds containing atoms other than carbon and hydrogen
    • C08G16/0237Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes with acyclic or carbocyclic organic compounds containing atoms other than carbon and hydrogen containing sulfur
    • CCHEMISTRY; METALLURGY
    • C14SKINS; HIDES; PELTS; LEATHER
    • C14CCHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
    • C14C3/00Tanning; Compositions for tanning
    • C14C3/02Chemical tanning
    • C14C3/08Chemical tanning by organic agents
    • C14C3/18Chemical tanning by organic agents using polycondensation products or precursors thereof
    • C14C3/20Chemical tanning by organic agents using polycondensation products or precursors thereof sulfonated

Landscapes

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

Description

  

  Verfahren zur Darstellung eines     Gerbstoffes.       Es wurde in weiterer Ausarbeitung des  Verfahrens gemäss     Hauptpatent    gefunden,  dass -ein Gerbstoff mit wertvollen Eigen  schaften entsteht, wenn man Phenol mit Al  .dol und     Chlo-rnitrobenzolsulfosäure    umsetzt.  Man     kondensiert    zweckmässig das Phe  nol mit     Aldol    und setzt das entstan  dene     Kondensationsprodukt    .mit     Chlornitro-          benzolsulf        osäure    um. Es kann von Vor  teil sein, die Umsetzung     -unter    Druck vor  zunehmen.

   Der Gerbstoff stellt eine homo  gene, bräunlich gefärbte, sirupartige Lösung  dar, ist leicht löslich in Wasser und     Alka-          lien,    fällt Gelatine aus ihrer Lösung und       gibt    charakteristische Färbungen mit Eisen  salzen.  



  <I>Beispiel:</I>  65 Teile Phenol werden mit 40 Teilen       Aldol    in Gegenwart eines     Katalysators,    z. B.  5 Teilen konzentrierte Salzsäure, in bekann  ter Weise zu einem harzartigen Körper kon  densiert. Dieser wird in 90 Teilen Wasser  und 60 Teilen Natronlauge (40'     B6)    warm  gelöst. In die Lösung bringt man unter gu-         tem    Rühren 120 Teile     chlornitrobenzolsulfo-          saures    Natrium ein und erwärmt, nachdem  alles gelöst ist, die Masse langsam bis zum  schwachen Sieden. Die Siedetemperatur wird  so lange eingehalten, bis eine Probe nach  Verdünnen mit Wasser auf Zusatz von Säure  keinen Niederschlag mehr ausscheidet.

   Die  erhaltene wässerige Lösung kann zur  Trockne eingedampft oder auch als solche  nach erforderlicher Verdünnung und Einstel  lung auf die erwünschte     Acidität    zum Ger  ben verwendet werden. Man erzielt eine  rasche     Durehgerbung.    Die erhaltenen Leder  zeichnen sich durch helle Farbe, vollen Griff  und hohe Reissfestigkeit aus. Die     Gerbung     kann natürlich auch     ausgeführt    werden in  Gegenwart anderer vegetabilischer oder  künstlicher Gerbstoffe.



  Process for the preparation of a tanning agent. In a further elaboration of the process according to the main patent, it was found that a tannin with valuable properties is produced when phenol is reacted with Al .dol and chloro-nitrobenzenesulfonic acid. The phenol is conveniently condensed with aldol and the condensation product formed is reacted with chloronitrobenzenesulfonic acid. It can be advantageous to carry out the implementation under pressure.

   The tanning agent is a homogeneous, brownish, syrupy solution, is easily soluble in water and alkali, gelatine falls out of its solution and gives characteristic colors with iron salts.



  <I> Example: </I> 65 parts of phenol are mixed with 40 parts of aldol in the presence of a catalyst, e.g. B. 5 parts of concentrated hydrochloric acid, condensed in a well-known manner to form a resinous body. This is dissolved warm in 90 parts of water and 60 parts of sodium hydroxide solution (40 'B6). 120 parts of chloronitrobenzenesulphonic acid sodium are introduced into the solution with vigorous stirring and, once everything has dissolved, the mass is slowly heated to a gentle boil. The boiling temperature is maintained until a sample no longer separates out after dilution with water with the addition of acid.

   The resulting aqueous solution can be evaporated to dryness or used as such for tanning after the necessary dilution and adjustment to the desired acidity. Quick tanning is achieved. The leathers obtained are distinguished by their light color, full handle and high tensile strength. The tanning can of course also be carried out in the presence of other vegetable or artificial tanning agents.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Gerb stoffes, darin bestehend, dass man Phenol mit Aldol und Chornitrobenzolsulfosäure kondensiert. Der Gerbstoff stellt eine homo- bene, bräunlich gefärbte, sirupartige Lösung dar, ist leicht löslich in Wasser und Alka lien, fällt Gelatine aus ihrer Lösung und gibt charakteristische I'ärbunben mit Eisen salzen. PATENT CLAIM: Process for the preparation of a tanning substance, consisting in that phenol is condensed with aldol and chornitrobenzenesulfonic acid. The tanning agent is a homogeneous, brownish, syrupy solution, is easily soluble in water and alkali, gelatine falls out of its solution and gives characteristic coloration with iron salts.
CH112326D 1923-02-07 1924-09-15 Process for the preparation of a tanning agent. CH112326A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE107632X 1923-02-07
CH112326T 1924-09-15

Publications (1)

Publication Number Publication Date
CH112326A true CH112326A (en) 1925-10-16

Family

ID=25708014

Family Applications (1)

Application Number Title Priority Date Filing Date
CH112326D CH112326A (en) 1923-02-07 1924-09-15 Process for the preparation of a tanning agent.

Country Status (1)

Country Link
CH (1) CH112326A (en)

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