DE414270C - Process for the production of tanning agents - Google Patents

Process for the production of tanning agents

Info

Publication number
DE414270C
DE414270C DEF51876D DEF0051876D DE414270C DE 414270 C DE414270 C DE 414270C DE F51876 D DEF51876 D DE F51876D DE F0051876 D DEF0051876 D DE F0051876D DE 414270 C DE414270 C DE 414270C
Authority
DE
Germany
Prior art keywords
production
tanning agents
lignite
degradation products
nitric acid
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
DEF51876D
Other languages
German (de)
Inventor
Dr Karl Daimler
Dr Alfred Eckelmann
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.)
Hoechst AG
Original Assignee
Hoechst 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 Hoechst AG filed Critical Hoechst AG
Priority to DEF51876D priority Critical patent/DE414270C/en
Application granted granted Critical
Publication of DE414270C publication Critical patent/DE414270C/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

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 von Gerbmitteln. Bekanntlich wird die Sulfitcelluloseablauge (Sulfitrech) in den Gerbereien als Hilfsmittel mim Gerben benutzt. Vorteilhafter ist die -Ver«-endung der freien und dabei noch entkalkten Ligninsulfosätire bzw. der sauren Salze.Process for the manufacture of tanning agents. As is known, the sulphite cellulose waste liquor (Sulphite rake) used in tanneries as an aid in tanning. More advantageous is the "use" of the free and still decalcified lignosulfosate or of acid salts.

Es wurde atni gefunden, daß man beim --Tischen bz«-. beim Umsetzen von StilfitcelluloseabJauge mit den gerbenden, ganz oder größtenteils wasserlöslichen, braunen, aus Braunkohlen mittels Salpetersäure Hergestellten Abbauprodukten «-ertvolle Gerbstoffe erliä]t. Die in den Abbauprodukten der Braunkohle mittels Salpetersäure enthaltenen, sehr starken organischen Säuren vermögen offenbar das Calcium- oder \ atriuinsalz der Lignin-,#trIfosä ur en in die freie Säure oder zum mindesten in saure ligninstilfosaure Salze überzuführen. Das Verfahren hat insbesondere auch noch den Vorteil, daß die Abbauprodukte der Braunkohle, wie es sich gezeigt hat (vgl. Pateiit.4o5?g9), zweckmäßig nicht unmittelbar zur NI erwendung gelangen, sondern erst nach Abstumpfung mit einer Base. Im vorliegenden Falle wirken die sauren Calciunisalze der Sulfitcelluloseablauge oder die aus diesen hergestellten 1 atriumsalze auf die erwähnten stark sauren Abbauprodukte der Braunkohle abstumpfend, dienen also gleichzeitig als billiger Ersatz der Base.It was found atni that when you --table bz «-. when moving from StilfitcelluloseabJauge with the tanning, wholly or largely water-soluble, brown degradation products made from lignite using nitric acid «- valuable Tannins available. Those in the degradation products of lignite by means of nitric acid The very strong organic acids contained are evidently capable of calcium or The atrium salt of the lignin and trifonic acids in the free acid or at least in to transfer acidic ligninstilfosate salts. The procedure in particular also has nor the advantage that the degradation products of the lignite, as it has been shown (cf. Pateiit.4o5? g9), it is advisable not to get to the NI directly, but rather only after blunting with a base. In the present case, the acidic calcium salts are effective the sulphite cellulose waste liquor or the atrium salts produced from them on the The aforementioned strongly acidic degradation products of lignite deadening, so serve at the same time as a cheap replacement for the base.

Die Herstellung der obenerwähnten Gerbstofe kann durch -Mischen oder Erwärmen von ligninsulfosauren Salzen mit den durch Einwirkung von Salpetersäure auf Braunkohle erhältlichen Abbauprodukten geschehen. Beispiel.The above-mentioned tanning agents can be produced by mixing or Heating of lignin sulfonic acid salts with the action of nitric acid degradation products available on lignite happen. Example.

z Teile Braunkohleabbauprodukt, hergestellt aus i 5CioTeilen entbituminierterBraunkohlerückstände von 6¢ Prozent Trockengehalt und 3 ooo Teilen Salpetersäure von 47 Prozent, werden mit i Teil gepulverter, trockener oder gelöster Sulfitcelluloseablauge, zweckmäßig in der Wärme, verrührt. Das Produkt besitzt ausgezeichnete gerberische Eigenschaften.z parts of lignite mining product, made from i 5Cio parts of debituminated lignite residues of 6 ¢ percent dry matter and 3,000 parts of nitric acid of 47 percent with one part powdered, dry or dissolved sulphite cellulose waste liquor, appropriate in the warmth, stirred. The product has excellent tannery properties.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Gerbmitteln, darin bestehend, daß man die durch Einwirkung von Salpetersäure auf Braunkohle erhältlichen Abbauprodukte mit l.igninsulfosauren Salzen vermengt oder zur Umsetzung bringt. PATENT CLAIM: Process for the production of tanning agents, consisting in that the degradation products obtainable by the action of nitric acid on lignite are mixed with lignin sulfonic acid salts or made to react.
DEF51876D 1922-05-18 1922-05-18 Process for the production of tanning agents Expired DE414270C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEF51876D DE414270C (en) 1922-05-18 1922-05-18 Process for the production of tanning agents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF51876D DE414270C (en) 1922-05-18 1922-05-18 Process for the production of tanning agents

Publications (1)

Publication Number Publication Date
DE414270C true DE414270C (en) 1925-05-27

Family

ID=7104979

Family Applications (1)

Application Number Title Priority Date Filing Date
DEF51876D Expired DE414270C (en) 1922-05-18 1922-05-18 Process for the production of tanning agents

Country Status (1)

Country Link
DE (1) DE414270C (en)

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