CH112327A - Process for the preparation of a tanning agent. - Google Patents

Process for the preparation of a tanning agent.

Info

Publication number
CH112327A
CH112327A CH112327DA CH112327A CH 112327 A CH112327 A CH 112327A CH 112327D A CH112327D A CH 112327DA CH 112327 A CH112327 A CH 112327A
Authority
CH
Switzerland
Prior art keywords
preparation
tanning
tanning agent
solution
parts
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 CH112327A publication Critical patent/CH112327A/en

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
    • C14C3/18—Chemical tanning by organic agents using polycondensation products or precursors thereof
    • C14C3/20—Chemical tanning by organic agents using polycondensation products or precursors thereof sulfonated
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G16/00—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00
    • C08G16/02—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes
    • C08G16/0212—Condensation 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
    • C08G16/0218—Condensation 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
    • C08G16/0237—Condensation 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

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     Kresol    mit     Al-          dol    und     Chlornitrobenzolsulfosäure    umsetzt.  Man kondensiert zweckmässig das     Kresol    mit       Aldol    und setzt das entstandene Konden  sationsprodukt mit     Chlornitrobenzolsulfo-          säure    um. Es kann von Vorteil sein, die Um  setzung unter     Druck    vorzunehmen.

   Der Gerb  stoff stellt eine homogene, bräunlich gefärbte,       sirupartige        Lösung    dar. ist leicht löslich in       N,#'asser        und        Alkalien,    fällt Gelatine aus  ihrer Lösung und gibt charakteristische Fär  bungen mit Eisensalzen.    <I>Beispiel</I>    ?0 Teile     Kresol    werden mit 40 Teilen       Aldo,l    in Gegenwart eines     Katalysators,    z.     B.     G 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     naeli     Verdünnen mit Wasser auf Zusatz von Säure  leinen Niederschlag mehr ausscheidet. Die  erhaltene     wässerige    Lösung kann zur  Trockne eingedampft oder auch als solche  nach erforderlicher Verdünnung und Ein  stellung auf die erwünschte     Acidität    zum       Gerben    verwendet werden.

   Man erzielt eine  rasche     Durchgerbung.    Die erhaltenen Leder  zeichnen sich durch helle Farbe, vollen  Griff und hohe Reissfestigkeit aus. Die Ger  bung kann natürlich auch ausgeführt wer  den 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 tanning agent with valuable properties is created when cresol is reacted with aldol and chloronitrobenzenesulfonic acid. The cresol is expediently 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 material is a homogeneous, brownish, syrupy solution. It is easily soluble in N, water and alkalis, gelatine falls out of its solution and gives characteristic colorations with iron salts. <I> Example </I>? 0 parts of cresol are mixed with 40 parts of Aldo, l in the presence of a catalyst, e.g. B. G parts 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).

   Brings into the solution. 120 parts of sodium chloronitrobenzenesulphate are added while stirring well and, after everything has dissolved, the mass is slowly heated to a low boiling point. The boiling temperature is maintained for so long. until a sample after dilution with water on the addition of acid, no more precipitate separates out. The aqueous solution obtained can be evaporated to dryness or used as such for tanning after the required dilution and adjustment to the desired acidity.

   Quick tanning is achieved. The leathers obtained are distinguished by their light color, full handle and high tear 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 Kresol mit Aldol und Chl.ornitrob@enzolsulfosäixre kondensiert. Der Gerbstoff stellt eine homo- gene, bräunlich gefärbte, sirupartige Lösung dar, ist leicht löslich in Wasser und Alka lien. fiillt Gelatine aus ihrer Lösung und gibt charakteristische Färbungen mit Eisen salzen. PATENT CLAIM: Process for the preparation of a tanning substance, consisting in that cresol is condensed with aldol and Chl.ornitrob@enzolsulfosäixre. The tanning agent is a homogeneous, brownish, syrupy solution and is easily soluble in water and alkali. fills gelatine from its solution and gives characteristic colorations with iron salts.
CH112327D 1923-02-07 1924-09-15 Process for the preparation of a tanning agent. CH112327A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE107632X 1923-02-07
CH112327T 1924-09-15

Publications (1)

Publication Number Publication Date
CH112327A true CH112327A (en) 1925-10-16

Family

ID=25708015

Family Applications (1)

Application Number Title Priority Date Filing Date
CH112327D CH112327A (en) 1923-02-07 1924-09-15 Process for the preparation of a tanning agent.

Country Status (1)

Country Link
CH (1) CH112327A (en)

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