CH93292A - Process for the production of leather. - Google Patents
Process for the production of leather.Info
- Publication number
- CH93292A CH93292A CH93292DA CH93292A CH 93292 A CH93292 A CH 93292A CH 93292D A CH93292D A CH 93292DA CH 93292 A CH93292 A CH 93292A
- Authority
- CH
- Switzerland
- Prior art keywords
- leather
- tanning
- production
- iron
- straw
- Prior art date
Links
- 239000010985 leather Substances 0.000 title claims description 9
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 238000000034 method Methods 0.000 title claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical class [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 3
- 235000013311 vegetables Nutrition 0.000 claims description 3
- 239000000470 constituent Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000010902 straw Substances 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- LCPUDZUWZDSKMX-UHFFFAOYSA-K azane;hydrogen sulfate;iron(3+);sulfate;dodecahydrate Chemical compound [NH4+].O.O.O.O.O.O.O.O.O.O.O.O.[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O LCPUDZUWZDSKMX-UHFFFAOYSA-K 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 241000219492 Quercus Species 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001844 chromium Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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
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 Leder. Die Gerbung von Fellen und Häuten hat den Zweck, zunächst die Haut vor Fäulnis zu bewahren, dann aber auch, sie so zu kon servieren, dass an Stelle des pergamentähn lichen Zustandes der Charakter als Leder hervortritt. Neben den bekannten organischen Gerbmitteln haben sieh auch besonders die Salze des dreiwertigen Chroms in der Ger berei eingebürgert, welche ausschliesslich zur Herstellung von Oberleder verwandt werden.
Man hat auch versucht, für das Chrom das billigere Eisen einzuführen, jedoch ohne E.- folg. Die bisherigen, mit Eisen gegerbten Leder zeigen neben Brüchigkeit des Narbs noch grosse Ähnlichkeit mit getrockneter Haut.
Die vorliegende Erfindung hilft nun die- sein Übelstand ab. Es hat sich bezeigt, da.ss man auch bei Anwesenheit von Eisensal Gerbungen erzielen kann, die der Wirkung der pflanzlichen Gerbstoffe ähnlich sind. wenn man die Gerbung bei Gegenwart der Bestandteile vornimmt, welche durch Alka lien aus Holz, Stroh und andern pflanzlichen Stoffen ausgezogen werden.
Dieselben bilden dunkelbraun gefärbte Lösungen, welche durch Säuren und Sehwermetallsalze teilweise ge fällt werden. Versetzt man eine solche, zum Beispiel durch Kochen von Stroh mit Natron lauge Hergestellte Lösung mit Eisenalaun, so fällt langsam ein gelblicher Niederschlag aus. Lässt nian diese Suspension auf eine Haut einwirken, so erhält man nach vier zehn Tagen ein Leder, das dein mit Eichen rinde erhaltenen nicht nachsteht. Man kann iiaturgeuiiiss die Gerbung mit Chromsalz ver- bess;ern.
Beispiel: 50 kg Eisenalaun werden in 4135 Liter Wasser vollständig gelöst. Unter ständigem Umrühren wird langsam ein Auszug zu begeben. der diireli Kochen von 7.(_i0 kg Stroh mit 100 kg 5 '9iger Natronlauge erhalten wurde. Das Eintragen wird nur so lange fortgesetzt. dass die Cesariitlösung einen schwachsauren Cliara.kter beibehält.
Dünnere Häute zur Erzielung von Oberleder werden in dieser Brühe in etwa \?4 Stunden durch- ,o,egerl>t. dickere in fünf bis zehn Tagen. Das Leder ist nach der Gerbung unmittelbar "rebrauchsferti;2#.
Process for the production of leather. The purpose of tanning pelts and hides is to first protect the skin from rot, but then also to preserve it in such a way that its character as leather emerges instead of its parchment-like condition. In addition to the well-known organic tanning agents, the salts of trivalent chromium, in particular, have become naturalized in tanning, which are used exclusively for the production of upper leather.
Attempts have also been made to introduce the cheaper iron for chromium, but without any consequence. The leather tanned with iron up to now shows, in addition to the fragility of the grain, great resemblance to dried skin.
The present invention now remedies this drawback. It has been shown that even in the presence of iron saline, tanning can be achieved which is similar to that of vegetable tanning agents. if the tanning is carried out in the presence of the constituents which are extracted from wood, straw and other vegetable matter by alkali.
They form dark brown colored solutions, which are partially precipitated by acids and optic metal salts. If iron alum is added to such a solution, for example made by boiling straw with sodium hydroxide, a yellowish precipitate slowly separates out. If this suspension is not allowed to act on a skin, after fourteen days a leather is obtained that is as good as the one obtained with oak bark. You can naturally improve the tanning with chromium salt.
Example: 50 kg of iron alum are completely dissolved in 4135 liters of water. An extract is slowly issued while stirring constantly. the diireli boiling of 7. (_ 10 kg of straw was obtained with 100 kg of 5% sodium hydroxide solution. The addition is only continued for so long that the cesariite solution retains a weakly acidic cliara.
Thinner skins to achieve upper leather are in this broth in about \? 4 hours, o, ugh. thicker ones in five to ten days. The leather is immediately "ready for use" after tanning.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE145742X | 1917-12-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH93292A true CH93292A (en) | 1922-03-01 |
Family
ID=5670959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH93292D CH93292A (en) | 1917-12-14 | 1920-06-17 | Process for the production of leather. |
Country Status (3)
| Country | Link |
|---|---|
| AT (1) | AT91349B (en) |
| CH (1) | CH93292A (en) |
| GB (1) | GB145742A (en) |
-
1920
- 1920-06-15 AT AT91349D patent/AT91349B/en active
- 1920-06-17 CH CH93292D patent/CH93292A/en unknown
- 1920-07-02 GB GB18083/20A patent/GB145742A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB145742A (en) | 1921-10-03 |
| AT91349B (en) | 1923-02-26 |
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