CH215850A - Process for the production of a tanning substance. - Google Patents

Process for the production of a tanning substance.

Info

Publication number
CH215850A
CH215850A CH215850DA CH215850A CH 215850 A CH215850 A CH 215850A CH 215850D A CH215850D A CH 215850DA CH 215850 A CH215850 A CH 215850A
Authority
CH
Switzerland
Prior art keywords
production
parts
formaldehyde
mixture
tanning
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie 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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH215850A publication Critical patent/CH215850A/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

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 zur Herstellung eines gerbend wirkenden     Stoffes.       Gegenstand des Patentes Nr. 203438     ist     ein Verfahren zur Herstellung eines gerbend  wirkenden Stoffes, bei dem man     ss-Naphtha-          linsulfonsäure,    Harnstoff, Formaldehyd und  das durch     Sulfonieren    des technischen Ge  misches von     ortho-,        meta-    und     para-gresol     erhältliche Gemisch von     Kresolmonosulfon-          säuren    miteinander umsetzt.  



  Es wurde nun gefunden, dass man     einen     besonders wertvollen, gerbend wirkenden  Stoff erhält, wenn man bei dem Verfahren  des Hauptpatentes die     Anlagerungsverbin-          dung    von     Formaldehyd-Bisulfit    an     4,4'-Di-          oxydiphenylsulfon        miteinkondensiert.     



  Im übrigen sind die     Arbeitsbedingungen     die gleichen wie bei dem Verfahren des  Hauptpatentes.  



  Der neue gerbend wirkende Stoff kann  unmittelbar oder nach dem Abstumpfen bis  zu dem gewünschten Säuregrad zum Gerben  dienen. Er zeichnet sich durch hohe     Gerb-          wirkung    aus und liefert weisses Leder von    guter Fülle und ausgezeichneter Lichtbestän  digkeit.  



  Die in dem folgenden Beispiel angege  benen Teile sind Gewichtsteile.  



  <I>Beispiel:</I>  In einer Lösung von 30 Teilen roher       ss-Naphthasinsulfonsäure    (erhalten durch     Sul-          fonierung    von Naphthalin mit der gleichen  Menge 98%iger Schwefelsäure) in 30 Teilen  Wasser werden 30     Teile    der     Anlagerungs-          verbindung    von     Formaldehydbisulfit    an     4,4'-          DioxydiphenyIsulfon    und 12     Teile        Harnstoff     heiss gelöst.

   Dann gibt man bei<B>50'</B> C allmäh  lich 24,5 Teile     30%igen        Formaldehyd,    40  Teile des     Gemisches    von     Kresolmonosulfon-          säuren,    das erhalten wurde durch     Sulfonieren     eines technischen Gemisches von o-, m- und       p-Kresol    und 50 Teile der     Anlagerungsvem-          bindung    von     Formaldehydbisulfit    an     4,4'-Di-          oxydiphenyJsulfon    zu. Das Gemisch     wird    auf  <B>80-90'</B> erwärmt.

   Nach dem Abkühlen auf      etwa 25   C gibt man 13,7 Teile 30     %        igen     Formaldehyd zu und erwärmt     ?/.1    Stunde lang  auf 60-70   C. Durch Zufügen von 12,5 Tei  len Soda erhält man einen     Gerbstoff,    der  sehr lichtbeständiges Leder von guter Fülle  liefert.



  Process for the production of a tanning substance. The subject of patent no. 203438 is a process for the production of a tanning substance, in which one ss-naphthalenesulfonic acid, urea, formaldehyde and the mixture of cresol monosulfone obtained by sulfonating the technical mixture of ortho-, meta- and para-gresol - reacts acids with each other.



  It has now been found that a particularly valuable, tanning substance is obtained if, in the process of the main patent, the addition compound of formaldehyde bisulfite to 4,4'-dioxydiphenylsulfone is also condensed.



  Otherwise, the working conditions are the same as in the process of the main patent.



  The new tanning substance can be used for tanning immediately or after dulling to the desired degree of acidity. It is characterized by a high tanning effect and provides white leather with good body and excellent lightfastness.



  The parts given in the following example are parts by weight.



  <I> Example: </I> In a solution of 30 parts of crude ß-naphthasine sulfonic acid (obtained by sulfonating naphthalene with the same amount of 98% sulfuric acid) in 30 parts of water, 30 parts of the addition compound of formaldehyde bisulfite are formed 4,4'-DioxydiphenyIsulfon and 12 parts of urea dissolved hot.

   Then at <B> 50 '</B> C, 24.5 parts of 30% formaldehyde, 40 parts of the mixture of cresol monosulfonic acids, which was obtained by sulfonating a technical mixture of o-, m- and p, are gradually added -Kresol and 50 parts of the addition compound of formaldehyde bisulfite to 4,4'-dioxydiphenyJsulfon. The mixture is heated to <B> 80-90 '</B>.

   After cooling to about 25 ° C., 13.7 parts of 30% formaldehyde are added and the mixture is heated to 60-70 ° C. for 1 hour. By adding 12.5 parts of soda, a tanning agent is obtained, which is very lightfast leather supplies of good abundance.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines gerbend wirkenden Stoffes, dadurch gekennzeichnet, da.ss man ss-Naphthalinsulfonsäure, Harnstoff, Formaldehyd und das durch Sulfonieren des technischen Gemisches von ortho-, meta- und para-Kresol erhältliche Gemisch von Kresol- monosulfonsäuren miteinander umsetzt und dabei die Anlagerungsverbindung von Form- aldehy d-Bisulfit an 4, PATENT CLAIM: Process for the production of a tanning substance, characterized in that ss-naphthalenesulfonic acid, urea, formaldehyde and the mixture of cresol monosulfonic acids obtainable by sulfonating the technical mixture of ortho-, meta- and para-cresol are reacted with one another and the addition compound of formaldehyde d-bisulfite to 4, 4'-Diogydiphenylsul- fon miteinkondensiert. Der neue Gerbstoff liefert weisses Leder von guter Fülle und hoher Lichtbeständig keit. 4'-Diogydiphenylsulfon co-condensed. The new tanning agent provides white leather with good body and high lightfastness.
CH215850D 1938-03-17 1939-02-21 Process for the production of a tanning substance. CH215850A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE215850X 1938-03-17
CH203438T 1939-02-21

Publications (1)

Publication Number Publication Date
CH215850A true CH215850A (en) 1941-07-15

Family

ID=25723938

Family Applications (1)

Application Number Title Priority Date Filing Date
CH215850D CH215850A (en) 1938-03-17 1939-02-21 Process for the production of a tanning substance.

Country Status (1)

Country Link
CH (1) CH215850A (en)

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