CH252303A - Process for the production of a tanning condensation product. - Google Patents

Process for the production of a tanning condensation product.

Info

Publication number
CH252303A
CH252303A CH252303DA CH252303A CH 252303 A CH252303 A CH 252303A CH 252303D A CH252303D A CH 252303DA CH 252303 A CH252303 A CH 252303A
Authority
CH
Switzerland
Prior art keywords
diphenyl
condensation product
tanning
production
weight
Prior art date
Application number
Other languages
German (de)
Inventor
Ag J R Geigy
Original Assignee
Ag J R Geigy
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 Ag J R Geigy filed Critical Ag J R Geigy
Publication of CH252303A publication Critical patent/CH252303A/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C317/00Sulfones; Sulfoxides
    • 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)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Phenolic Resins Or Amino Resins (AREA)

Description

  

      Verfahren        zur        Herstellung        eines    gerbend     wirkenden    Kondensationsproduktes.    Gegenstand vorliegenden Patentes ist ein  Verfahren zur Herstellung eines gerbend wir  kenden     Kondensationsproduktes.    Das Ver  fahren ist dadurch gekennzeichnet, dass man       4-Oxy-diphenyl-sulfonsäure-(4'),        4,4'-Dioxy-          diphenyl-sulfon    und Formaldehyd miteinan  der kondensiert. Der erhaltene neue Gerb  stoff liefert rein weisse, volle und lichtechte  Leder.  



  <I>Beispiel 1:</I>  100     Gewichtsteile        4-Oxy-diphenyl    werden  mit 125     Gewichtsteilen        .Schwefelsäuremono-          hydrat    2     Stunden    auf 105 bis 110  erhitzt.  Die     4-Oxy-diphenylsulfonsäure-(4')    wird mit       '\4rasser        verdünnt,        mit    125 Gewichtsteilen       4,4'-Dioxy-diphenylsulfon    und 70 Gewichts  teilen Formaldehyd<B>30%</B> versetzt und hier  auf 45 Minuten bei 95     bis    100  kondensiert.

    Durch Neutralisation mit Ammoniak und       Ansäuern    mit Essigsäure wird ein ausge  zeichneter Gerbstoff erhalten, welcher rein  weisse, volle und lichtechte Leder liefert.  Ebensogut kann die     Kondensation    auch in  alkalischem Medium     vorgenommen    werden.       Beispiel   <I>2:</I>  100     Gewichtsteile        4-Oxy-diphenyl    werden  durch zweistündiges Erhitzen mit 125 Ge  dichtsteilen     S'chwefelsäuremonohydrat    auf  <B>110</B> bis 115  sulfoniert.

   Zu dieser Schmelze  gibt man eine aus     4,4'-Dioxy-diphenylsulfon     und Formaldehyd hergestellte     Methylolver-          bindung,    die man erhält, indem man 100 Ge  wichtsteile     4,4'-Dioxy-diphenylsulfon    in 80         Gewichtsteilen    Wasser und 105 Gewichtstei  len 30%iger Natronlauge löst und nach Zu  gabe von 45 Gewichtsteilen Formaldehyd       30%    24     Stunden    lang auf 50     bis    55  er  wärmt, das harzige Kondensationsprodukt  vorsichtig mit Salzsäure ausfällt, abtrennt  und mit Wasser wäscht.

   Nach Zugabe von  27 Gewichtsteilen Formaldehyd<B>30%</B>     wird     hierauf eine Stunde bei 95 bis 100  konden  siert. Anschliessend wird wie in     Beispiel    1       aufzearbeitet.  



      Process for the production of a tanning condensation product. The present patent is a process for the preparation of a tanning we kenden condensation product. The process is characterized in that 4-oxy-diphenyl-sulfonic acid- (4 '), 4,4'-dioxydiphenyl-sulfone and formaldehyde are condensed together. The new tanning material obtained provides pure white, full and lightfast leather.



  <I> Example 1 </I> 100 parts by weight of 4-oxydiphenyl are heated with 125 parts by weight of sulfuric acid monohydrate to 105 to 110 for 2 hours. The 4-oxy-diphenylsulphonic acid (4 ') is diluted with' \ 4rasser, mixed with 125 parts by weight of 4,4'-dioxy-diphenylsulphone and 70 parts by weight of formaldehyde <B> 30% </B> and here for 45 minutes 95 to 100 condensed.

    An excellent tanning agent is obtained by neutralization with ammonia and acidification with acetic acid, which gives pure white, full and lightfast leather. The condensation can also be carried out in an alkaline medium. Example <I> 2: </I> 100 parts by weight of 4-oxy-diphenyl are sulfonated to <B> 110 </B> to 115 by heating for two hours with 125 parts by weight of sulfuric acid monohydrate.

   A methylol compound prepared from 4,4'-dioxydiphenylsulfone and formaldehyde is added to this melt and is obtained by adding 100 parts by weight of 4,4'-dioxydiphenylsulfone in 80 parts by weight of water and 105 parts by weight of 30% strength Sodium hydroxide solution dissolves and after adding 45 parts by weight of formaldehyde 30% for 24 hours at 50 to 55 he warms up, the resinous condensation product carefully precipitates with hydrochloric acid, separated off and washed with water.

   After adding 27 parts by weight of formaldehyde <B> 30% </B>, the mixture is then condensed at 95 to 100 for one hour. It is then worked up as in Example 1.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines gerbend wirkenden Kondensationsproduktes, dadurch gekennzeichnet, dass man 4-Oxy-diphenyl-sul- fonsäure-(4'), 4,4'-Dioxy-diphenyl-sulfon und Formaldehyd miteinander kondensiert. Der erhaltene neue Gerbstoff liefert rein weisse, volle und lichtechte Leder. <B>UNTERANSPRÜCHE:</B> 1. Verfahren nach Patentanspruch, da durch gekennzeichnet, dass die Kondensation in saurem Medium vorgenommen wird. 2. Claim: Process for the production of a tanning condensation product, characterized in that 4-oxy-diphenyl-sulphonic acid- (4 '), 4,4'-dioxy-diphenyl-sulphone and formaldehyde are condensed with one another. The new tanning agent obtained provides pure white, full and lightfast leather. <B> SUBClaims: </B> 1. The method according to the patent claim, characterized in that the condensation is carried out in an acidic medium. 2. Verfahren nach Patentanspruch, da durch gekennzeichnet, dass die Kondensation in alkalischem Medium vorgenommen wird. 3. Verfahren nach Patentanspruch, da durch gekennzeichnet, dass man das 4,4'-Di- oxy-diphenyl-sulfon mit- Formaldehyd vor kondensiert und erst dann mit 4-Oxy-diphe- nyl-sulfonsäure-(4') und weiterem Form aldehyd umsetzt. Method according to patent claim, characterized in that the condensation is carried out in an alkaline medium. 3. The method according to claim, characterized in that the 4,4'-dioxy-diphenyl-sulfone is condensed with formaldehyde and only then with 4-oxy-diphenyl-sulfonic acid (4 ') and more Form aldehyde converts.
CH252303D 1945-08-03 1945-08-03 Process for the production of a tanning condensation product. CH252303A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH252303T 1945-08-03
CH246989T 1945-08-03

Publications (1)

Publication Number Publication Date
CH252303A true CH252303A (en) 1947-12-15

Family

ID=25729176

Family Applications (1)

Application Number Title Priority Date Filing Date
CH252303D CH252303A (en) 1945-08-03 1945-08-03 Process for the production of a tanning condensation product.

Country Status (1)

Country Link
CH (1) CH252303A (en)

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