AT69375B - Process for the production of tanning substances. - Google Patents
Process for the production of tanning substances.Info
- Publication number
- AT69375B AT69375B AT69375DA AT69375B AT 69375 B AT69375 B AT 69375B AT 69375D A AT69375D A AT 69375DA AT 69375 B AT69375 B AT 69375B
- Authority
- AT
- Austria
- Prior art keywords
- production
- tanning substances
- sugar
- substances
- tanning
- Prior art date
Links
Landscapes
- Treatment And Processing Of Natural Fur Or Leather (AREA)
- Compounds Of Unknown Constitution (AREA)
Description
<Desc/Clms Page number 1>
Verfahren zur Herstellung gerbender Stoffe.
Durch das nachstehend beschriebene Verfahren werden in technisch einfacher und wirtschaftlich vorteilhafter Weise ganz neuartige, sehr wertvolle stark gerbend wirkende Stoffe erhalten.
EMI1.1
werden. Es ist vorteilhaft dem Reaktionsgemisch etwas Essigsäure zuzufügen.
Die Reaktion kann derart bewerkstelligt werden, dass man entweder den Zucker in dem
EMI1.2
Gerbstoncharakter.
Durch die Arbeiten E. Fischers u-Freudenberg & ist es bekannt geworden, Gerbstoffe durch Kondensation von Traubenzucker mit sehr komplizierten organischen Körpern zu erhalten, diese Reaktionen, welche unter ausserordentlich schwierigen experimentellen Bedingungen vor sich gehen, haben jedoch nur ein theoretisches Interesse, sind hingegen technisch nicht verwertbar.
Ausführungsbeispiele :
EMI1.3
soviel, dass bei der Reaktion keine unlöslichen Ausscheidungen entstehen.
2. Etwa die gleichen Mengen Phenol und konzentrierte Schwefelure werden zusammen- gehracht und bis zur vollständigen Wasserlöslichkeit erhitzt. Hierauf trägt man den Zucker in dem gewünschten Verhältnis ein und erhitzt längere Zeit mit oder ohne Druck bei mässiger Temperatur solange. bis das Reaktionsgemisch wieder klar löslich geworden ist. Zur Beschleunigung
EMI1.4
PATENT-ANSPRÜCHE:
1 Verfahren zur Herstellung gerbender Stoffe, dadurch gekennzeichnet, dass Phenole oder Phenolsulfosäuren oder Gemische dieser Stoffe mit Traubenzucker oder anderen Zuckeraten buzz Zucker bildenden Stoffen und mit Schwefelsäure bzw. substituierten Schwefelsäuren bei nicht zu hoher Temperatur behandelt werden, so zwar, dass ganz oder doch im wesentlichen in Wasser lösliche Produkte entstehen.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Process for the production of tanning substances.
The process described below gives completely new, very valuable, strongly tanning substances in a technically simple and economically advantageous manner.
EMI1.1
will. It is advantageous to add a little acetic acid to the reaction mixture.
The reaction can be accomplished by either adding the sugar to the
EMI1.2
Tannin character.
Through the work of E. Fischer u-Freudenberg & it has become known to obtain tannins by condensation of grape sugar with very complicated organic bodies, but these reactions, which take place under extremely difficult experimental conditions, are only of theoretical interest technically not usable.
Embodiments:
EMI1.3
so much that no insoluble precipitates arise during the reaction.
2. Approximately the same amounts of phenol and concentrated sulfuric acid are mixed together and heated until they are completely soluble in water. The sugar is then added in the desired ratio and heated for a long time with or without pressure at a moderate temperature. until the reaction mixture has become clearly soluble again. To speed up
EMI1.4
PATENT CLAIMS:
1 Process for the production of tanning substances, characterized in that phenols or phenol sulfonic acids or mixtures of these substances with grape sugar or other sugar-forming substances and with sulfuric acid or substituted sulfuric acids are treated at a temperature that is not too high, so that all or at least essentially water-soluble products are formed.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT69375T | 1913-06-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT69375B true AT69375B (en) | 1915-07-26 |
Family
ID=3591195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT69375D AT69375B (en) | 1913-06-13 | 1913-06-13 | Process for the production of tanning substances. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT69375B (en) |
-
1913
- 1913-06-13 AT AT69375D patent/AT69375B/en active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AT69375B (en) | Process for the production of tanning substances. | |
AT123655B (en) | Process for the production of a viscous condensation product. | |
DE499710C (en) | Process for the production of urea-formaldehyde condensation products | |
DE210563C (en) | ||
DE520922C (en) | Process for the preparation of 2-phenylquinoline-4-carboxylic acid | |
DE499523C (en) | Process for the production of ª ‡ -oxy acids from their nitriles | |
DE487868C (en) | Manufacture of bleach and disinfectants | |
DE531296C (en) | Process for the production of water-soluble, in acidic and alkaline solutions soluble products from wool fatty acids | |
DE611373C (en) | Process for the preparation of fatty acid derivatives | |
AT88650B (en) | Process for the production of a tanning agent from sulphite cellulose waste liquor. | |
DE741651C (en) | Process for the production of ointments and ointment bases | |
DE478272C (en) | Process for the production of sulphonic acids | |
DE633896C (en) | Process for the production of curable condensation products from phenols, hexamethylenetetramine, urea and formaldehyde | |
AT114018B (en) | Process for the preparation of ethylidene diacetate. | |
AT122954B (en) | Process for the production of water-soluble condensation products with a tanning effect. | |
AT68796B (en) | Process for the production of tanning preparations which are easily soluble in cold water. | |
DE683802C (en) | Process for the production of synthetic tanning agents | |
AT61061B (en) | Process for the production of tanning agents. | |
DE589545C (en) | Process for the production of acetyl cellulose | |
DE352982C (en) | Process for the preparation of hydroquinone | |
DE555005C (en) | Process for the preparation of water-soluble condensation products with a tanning effect | |
AT116718B (en) | Process for the preparation of β-substitution products of pyridine. | |
AT10741B (en) | Process for decolorizing sugar juices. | |
DE381414C (en) | Process to make difficult or insoluble tannins easily soluble in cold water | |
AT128350B (en) | Process for the preparation of low-electrolyte aqueous solutions of silk fibroin. |