AT69195B - Process for digesting the sparingly soluble tannins present in raw quebracho broths. - Google Patents
Process for digesting the sparingly soluble tannins present in raw quebracho broths.Info
- Publication number
- AT69195B AT69195B AT69195DA AT69195B AT 69195 B AT69195 B AT 69195B AT 69195D A AT69195D A AT 69195DA AT 69195 B AT69195 B AT 69195B
- Authority
- AT
- Austria
- Prior art keywords
- quebracho
- raw
- sparingly soluble
- broths
- digesting
- Prior art date
Links
Landscapes
- Treatment And Processing Of Natural Fur Or Leather (AREA)
- Compounds Of Unknown Constitution (AREA)
Description
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längere Zeit unter Luftabschluss im Autoklaven am besten bis auf 130 erhitzt. Für 1 hl Brühe genügt der geringe Zusatz von etwa 10 bis tS Atzkalk (CaO) bzw. ungefähr die äquivalente Menge der anderen angeführten Stoffe. Nach Beendigung der Reaktion fügt man die der zu- geführten Verbindung äquivalente Menge einer Säure (z. B. Essig-Salzsäure usw. ) zu oder, wenn man die Gewinnung einer salzarmen Brühe beabsichtigt, eine Säure, die mit dem verwendeten Erdalkali ein schwer-bzw. unlösliches Salz bildet, welches man zweckmässig durch heisse Filtration aus der Brühe entfernt.
Durch nachfolgende Kühlung und Klärung können die nunmehr ausfallenden unlöslichen Stoffe vom Löslichen getrennt werden.
Der Niederschlag, dessen Menge oben mit zirka 20% angegeben wurde, enthält natur-
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Gerbstoff, welcher sich der Reaktion deshalb entzogen hat, we, es schwierig und zeitraubend ist, in jedem einzelnen Falle das schwankende Verhältnis zwischen leicht-und schwerlöslichen Gerbstoffen zu berücksichtigen, um danach die erforderliche Menge der wirksamen Substanz genauer zu bemessen. Man kann den schwerlöslichen Gerbstoff durch neuerliche Behandlung
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Körper können durch das bekannte Sulfitieren in Lösung gebracht werden und stellen dann ein Gerbmittel dar, welches wohl verwendet werden kann, aber die hervorragenden gerbenden Eigenschaften des kaltlöslichen Hauptanteils nicht besitzt.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
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It is best to heat it up to 130 for a long time in the autoclave in the absence of air. For 1 hl of broth, a small addition of about 10 to tS caustic lime (CaO) or approximately the equivalent amount of the other substances listed is sufficient. After the reaction has ended, the amount of an acid (e.g. acetic-hydrochloric acid, etc.) equivalent to the compound added is added or, if the intention is to obtain a low-salt broth, an acid which is difficult to combine with the alkaline earth metal used. or. insoluble salt forms, which is expediently removed from the broth by hot filtration.
Subsequent cooling and clarification can separate the now precipitated insoluble substances from the soluble ones.
The precipitation, the amount of which was given above as around 20%, contains natural
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Tanning agent, which has therefore evaded the reaction, because it is difficult and time-consuming to take into account the fluctuating ratio between readily and sparingly soluble tanning agents in each individual case in order to then measure the required amount of the active substance more precisely. You can remove the sparingly soluble tannin by treating it again
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Bodies can be brought into solution by the well-known sulphiting and then represent a tanning agent which can be used, but does not have the excellent tanning properties of the cold-soluble main component.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT69195T | 1913-07-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT69195B true AT69195B (en) | 1915-06-25 |
Family
ID=3591048
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT69195D AT69195B (en) | 1913-07-30 | 1913-07-30 | Process for digesting the sparingly soluble tannins present in raw quebracho broths. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT69195B (en) |
-
1913
- 1913-07-30 AT AT69195D patent/AT69195B/en active
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