DE500006C - Process for the production of a tanning agent - Google Patents

Process for the production of a tanning agent

Info

Publication number
DE500006C
DE500006C DER58709D DER0058709D DE500006C DE 500006 C DE500006 C DE 500006C DE R58709 D DER58709 D DE R58709D DE R0058709 D DER0058709 D DE R0058709D DE 500006 C DE500006 C DE 500006C
Authority
DE
Germany
Prior art keywords
production
tanning agent
waste liquor
tanning
formaldehyde
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
DER58709D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RICHARD ROLL
Original Assignee
RICHARD ROLL
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 RICHARD ROLL filed Critical RICHARD ROLL
Priority to DER58709D priority Critical patent/DE500006C/en
Application granted granted Critical
Publication of DE500006C publication Critical patent/DE500006C/en
Expired legal-status Critical Current

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
    • C14C3/24—Chemical tanning by organic agents using lignin derivatives, e.g. sulfate liquor

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 Gerbmittels Man hat bereits vorgeschlagen, Sulfitablauge zur Herstellung künstlicher Gerbstoffe zu 'verwenden. Indessen hat sich die Sulfitablauge als solche für Gerbzw .ecke bisher nicht bewährt.Process for the preparation of a tanning agent It has already been proposed To use sulphite waste liquor for the production of artificial tannins. Meanwhile has The sulphite waste liquor as such has not yet proven itself for tanning and cornering.

Nach Literaturangaben soll ferner, wenn man Sulfitablauge mit Formaldehyd im Überschuß zusetzt und die Ablauge .dann eindunstet, nur ein so geringer Gehalt an Formaldehyd in der Ablauge bleiben, daß dieser zur Verwendung der Ablauge als Füllmaterial von Leder nicht schädlich ist.According to the literature, if you use sulphite waste liquor with formaldehyde is added in excess and the waste liquor then evaporates, only such a low content of formaldehyde remain in the waste liquor that this is to use the waste liquor as Filling material of leather is not harmful.

Es 'hat sich nun ,gezeigt, daß, wenn .man Formaldehyd auf Sulfitablauge in alkalischer Lösung einwirken läßt, eine Reaktion erfolgt und ein wasserlöslicher Körper entsteht, der als künstlicher Gerbstoff unmittelbar verwendbar ist.It has now been shown that when formaldehyde is used on sulphite waste liquor Allowed to act in an alkaline solution, a reaction takes place and a water-soluble one Body is created that can be used immediately as an artificial tanning agent.

Ausführungsbeispiel Man behandelt ioo g Sulfitablauge mit 5o g Formaldehyd bei Gegenwart von z Alkali bei Wasserbadtemperatur. Es entsteht dann eine klare Lösung, die zum Gerben Verwendung finden .kann.Exemplary embodiment 100 g of sulphite waste liquor are treated with 50 g of formaldehyde in the presence of z alkali at water bath temperature. A clear one then emerges Solution that can be used for tanning.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Gerbmittels, dadurch gekennzeichnet, daß Sulfitablauge bei Gegenwart von Alkali mit Formaldehyd unter Erwärmung behandelt wird.PATENT CLAIM: Process for the production of a tanning agent, thereby characterized that sulphite waste liquor in the presence of alkali with formaldehyde under Warming is treated.
DER58709D 1923-06-15 1923-06-15 Process for the production of a tanning agent Expired DE500006C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER58709D DE500006C (en) 1923-06-15 1923-06-15 Process for the production of a tanning agent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER58709D DE500006C (en) 1923-06-15 1923-06-15 Process for the production of a tanning agent

Publications (1)

Publication Number Publication Date
DE500006C true DE500006C (en) 1930-06-16

Family

ID=7410876

Family Applications (1)

Application Number Title Priority Date Filing Date
DER58709D Expired DE500006C (en) 1923-06-15 1923-06-15 Process for the production of a tanning agent

Country Status (1)

Country Link
DE (1) DE500006C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE753346C (en) * 1940-03-30 1952-08-28 Ig Farbenindustrie Ag Process for the production of condensation products

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE753346C (en) * 1940-03-30 1952-08-28 Ig Farbenindustrie Ag Process for the production of condensation products

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