CH156126A - Process for the preparation of a tanning substance. - Google Patents
Process for the preparation of a tanning substance.Info
- Publication number
- CH156126A CH156126A CH156126DA CH156126A CH 156126 A CH156126 A CH 156126A CH 156126D A CH156126D A CH 156126DA CH 156126 A CH156126 A CH 156126A
- Authority
- CH
- Switzerland
- Prior art keywords
- tanning
- preparation
- parts
- tanning substance
- para
- Prior art date
Links
Landscapes
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Description
Verfahren zur Darstellung eines gerbenden Stoffes. Es wurde gefunden, dass man ein in Wasser in jedem Verhältnis klar lösliches und zum Gerben wertvolles Produkt erhält, wenn man para-Dioxydiphenylsulfon in wäs seriger Lösung bei Gegenwart von Naphtha- litinionosulfosäure mit Formaldehyd erhitzt. Die Konstitution des Endstoffes ist unbekannt, und die Wirkungsweise der Naphthalinmorio- sulfosäure nicht mit Sicherheit anzugeben. Das neue Produkt wird in Lösung durch Kochsalz gefällt und durch Ferrichlorid ein blauvioletter Niederschlag erzeugt.
Der neue Gerbstoff liefert bei der Gerbung ein Leder, das sowohl hinsichtlich der Lichtechtheit als auch der Fülle demjenigen überlegen ist, das mit den künstlichen Gerbstoffen erhalten wird, die aus Pherlolen nach bekannten Verfahren hergestellt sind.
<I>Beispiel:</I> <B>100</B> Teile Napbthalinmonosulfosäure., <B>100</B> Teile para <B>-</B> Dioxydiphenylsulfon, <B>50</B> Teile Wasser und 40 Teile Formaldehyd 30% werden<B>1</B>1/4 Stunden auf<B>105-106 0</B> erhitzt; das schwer lösliche Sulfon geht im Verlauf der Kondensation vollständig in -Lösung. Das Reaktionsgemisch wird mit Lauge neutrali siert, mit Essigsäure schwach angesäuert und mit Wasser auf<B>800</B> Teile eingestellt.
Zur Ausführung der Gerbung genügen<B>80</B> Teile des neuen Produktes auf<B>100</B> Teile Blössen- gewicht; es wird gegerbt, wie bei vegetabi lischen Gerbstoffen üblich ist.
Process for the preparation of a tanning substance. It has been found that a product which is clearly soluble in water in any ratio and is valuable for tanning is obtained if para-dioxydiphenylsulfone is heated with formaldehyde in an aqueous solution in the presence of naphthalatinionosulfonic acid. The constitution of the end product is unknown, and the mode of action of naphthalene moriosulfonic acid cannot be stated with certainty. The new product is precipitated in solution with common salt and a blue-violet precipitate is generated by ferric chloride.
During tanning, the new tanning agent yields a leather which is superior to that obtained with the artificial tanning agents produced from pherloles by known processes in terms of both lightfastness and fullness.
<I> Example: </I> <B> 100 </B> parts naphthalene monosulphonic acid., <B> 100 </B> parts para <B> - </B> dioxydiphenylsulphone, <B> 50 </B> parts Water and 40 parts of formaldehyde 30% are heated for <B> 1 </B> 1/4 hour to <B> 105-106 0 </B>; the sparingly soluble sulfone goes completely into solution in the course of the condensation. The reaction mixture is neutralized with alkali, weakly acidified with acetic acid and adjusted to 800 parts with water.
<B> 80 </B> parts of the new product to <B> 100 </B> parts pelt weight are sufficient to carry out the tanning; it is tanned, as is common with vegetable tanning agents.
Claims (1)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1930G0025630 DE611671C (en) | 1930-11-11 | 1930-11-11 | Process for the preparation of tanning condensation products from dioxydiphenyl sulfones |
CH156126T | 1931-11-01 | ||
DEG86445D DE617469C (en) | 1930-11-11 | 1933-09-17 | Process for the preparation of tanning condensation products from dioxydiphenyl sulfones |
Publications (1)
Publication Number | Publication Date |
---|---|
CH156126A true CH156126A (en) | 1932-07-31 |
Family
ID=34108243
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH156126D CH156126A (en) | 1930-11-11 | 1931-11-01 | Process for the preparation of a tanning substance. |
CH158724D CH158724A (en) | 1930-11-11 | 1931-11-01 | Process for the preparation of a tanning substance. |
CH158723D CH158723A (en) | 1930-11-11 | 1931-11-01 | Process for the preparation of a tanning substance. |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH158724D CH158724A (en) | 1930-11-11 | 1931-11-01 | Process for the preparation of a tanning substance. |
CH158723D CH158723A (en) | 1930-11-11 | 1931-11-01 | Process for the preparation of a tanning substance. |
Country Status (1)
Country | Link |
---|---|
CH (3) | CH156126A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0008032A1 (en) * | 1978-08-03 | 1980-02-20 | Bayer Ag | Condensation products from terphenyl-sulphonic acids, naphthalene-sulphonic acids, bis-(4-hydroxyphenyl)-sulphone and formaldehyde, and their use as tanning agents |
-
1931
- 1931-11-01 CH CH156126D patent/CH156126A/en unknown
- 1931-11-01 CH CH158724D patent/CH158724A/en unknown
- 1931-11-01 CH CH158723D patent/CH158723A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0008032A1 (en) * | 1978-08-03 | 1980-02-20 | Bayer Ag | Condensation products from terphenyl-sulphonic acids, naphthalene-sulphonic acids, bis-(4-hydroxyphenyl)-sulphone and formaldehyde, and their use as tanning agents |
Also Published As
Publication number | Publication date |
---|---|
CH158724A (en) | 1932-11-30 |
CH158723A (en) | 1932-11-30 |
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