CH90873A - Process for the manufacture of a tanning material. - Google Patents

Process for the manufacture of a tanning material.

Info

Publication number
CH90873A
CH90873A CH90873DA CH90873A CH 90873 A CH90873 A CH 90873A CH 90873D A CH90873D A CH 90873DA CH 90873 A CH90873 A CH 90873A
Authority
CH
Switzerland
Prior art keywords
manufacture
formaldehyde
tanning material
tanning
action
Prior art date
Application number
Other languages
German (de)
Inventor
Gesellschaft Fuer Chemis Basel
Original Assignee
Chem Ind Basel
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 Chem Ind Basel filed Critical Chem Ind Basel
Publication of CH90873A publication Critical patent/CH90873A/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

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     zui-        Herstellung    eines     gerbenden        Stoffes.       Es wurde gefunden, dass durch     Einwirkung     von Formaldehyd auf das     äquimolekulare     Gemisch der     Sulfamide    der Formel  
EMI0001.0008     
    ein neuer wertvoller     Gerbstoff    erhalten wird.  Dieser stellt ein in Wasser leicht lösliches  Pulver dar; welches Eiweiss aus wässeriger  Lösung stark ausfällt.  



  <I>Beispiel</I>  100 Teile Formaldehyd     h,    30 % werden  in eine schwach alkalische Lösung von 429  Teilen des     äquimolekularen    Gemisches de       Sulfamide    der Formel     _     
EMI0001.0014     
    erhalten durch Einwirkung von     2-Nitro-l-          toluol-4-sulföchlorid    auf ein     äquimolekulares     Gemisch von     Sulfanilsäure    und     Metanilsäure,     darauffolgende Reduktion und nochmalige  Einwirkung von     p-Toluolsulfocbloi,id,    einge  tragen und das Ganze,

   - vorzugsweise bei  Gegenwart von 250 Teilen     kristallisiertem          Natriumsulfit,.    5 bis 6 Stunden auf 100-120  im     geschlossenen-Gefäss    erhitzt. Die filtrierte  Lösung wird dann zwecks     Entfernung    der  schwefligen Säure angesäuert und aufgekocht.  



  Aus -der so erhaltenen, mit Mineralsäure  . angesäuerten Lösung fällt     Kochsalz    den Gerb-           stoff    in     Forin    einer öligen, bald fest werden  den Substanz aus:



  Method of manufacturing a tanning substance. It has been found that the action of formaldehyde on the equimolecular mixture of the sulfamides of the formula
EMI0001.0008
    a new valuable tanning agent is obtained. This is a powder that is easily soluble in water; which protein is strongly precipitated from aqueous solution.



  <I> Example </I> 100 parts of formaldehyde h, 30% are added to a weakly alkaline solution of 429 parts of the equimolecular mixture of sulfamides of the formula _
EMI0001.0014
    obtained by the action of 2-nitro-l-toluene-4-sulfochloride on an equimolecular mixture of sulfanilic acid and metanilic acid, subsequent reduction and repeated action of p-toluenesulfocbloi, id, entered and the whole,

   - Preferably in the presence of 250 parts of crystallized sodium sulfite. Heated to 100-120 in a closed vessel for 5 to 6 hours. The filtered solution is then acidified to remove the sulphurous acid and boiled.



  From the obtained with mineral acid. acidified solution, table salt precipitates the tannin in the form of an oily, soon the substance becomes solid:

Claims (1)

_ PATENTANSPRUCH: Verfahren zur Herstellung eines - Gerb- stoffes, dadurch gekennzeichnet, dass man Formaldehyd auf das äquimolekulare Gemisch der Sulfamide -der Formel EMI0002.0011 EMI0002.0012 einwirken lässt. _ PATENT CLAIM: Process for the production of a tanning material, characterized in that formaldehyde is added to the equimolecular mixture of the sulfamides of the formula EMI0002.0011 EMI0002.0012 can act. Dieser Gerbstoff stellt ein in Wasser leicht lösliches Pulver. dar, welches Eiweiss aus w4sseriger Lösung'stark ausfällt: UNTERANSPRUCH:" Verfahren nach Patentansprucb; dadurch gekennzeichnet, dass man die Einwirkung des Formaldebydes in Gegenwart von -Natrium sulfit vollzieht. This tanning agent is a powder that is easily soluble in water. shows which protein from aqueous solution precipitates strongly: SUBSTANTIAL CLAIM: "Process according to patent claim; characterized in that the action of the formaldehyde is carried out in the presence of sodium sulfite.
CH90873D 1916-05-18 1916-05-18 Process for the manufacture of a tanning material. CH90873A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH90094T 1916-05-18
CH90873T 1916-05-18

Publications (1)

Publication Number Publication Date
CH90873A true CH90873A (en) 1921-10-01

Family

ID=25704117

Family Applications (1)

Application Number Title Priority Date Filing Date
CH90873D CH90873A (en) 1916-05-18 1916-05-18 Process for the manufacture of a tanning material.

Country Status (1)

Country Link
CH (1) CH90873A (en)

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