EP0448948A1 - Process for the treatment of leather and hides - Google Patents
Process for the treatment of leather and hides Download PDFInfo
- Publication number
- EP0448948A1 EP0448948A1 EP91102123A EP91102123A EP0448948A1 EP 0448948 A1 EP0448948 A1 EP 0448948A1 EP 91102123 A EP91102123 A EP 91102123A EP 91102123 A EP91102123 A EP 91102123A EP 0448948 A1 EP0448948 A1 EP 0448948A1
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- EP
- European Patent Office
- Prior art keywords
- component
- ethylene oxide
- atoms
- per mole
- alkyl
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000010985 leather Substances 0.000 title claims abstract description 10
- 238000005238 degreasing Methods 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 229920000151 polyglycol Polymers 0.000 claims abstract description 8
- 239000010695 polyglycol Substances 0.000 claims abstract description 8
- 239000003945 anionic surfactant Substances 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims description 8
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 5
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 5
- -1 alkenyl ethylene oxide Chemical compound 0.000 claims description 5
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 125000005741 alkyl alkenyl group Chemical group 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- 239000004721 Polyphenylene oxide Substances 0.000 claims 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims 1
- 150000001335 aliphatic alkanes Chemical class 0.000 claims 1
- 125000003342 alkenyl group Chemical group 0.000 claims 1
- 150000008051 alkyl sulfates Chemical class 0.000 claims 1
- 229920000570 polyether Polymers 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims 1
- 238000005187 foaming Methods 0.000 abstract description 6
- 150000002170 ethers Chemical class 0.000 abstract description 5
- 238000005237 degreasing agent Methods 0.000 abstract 1
- 239000013527 degreasing agent Substances 0.000 abstract 1
- 239000004094 surface-active agent Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 150000002191 fatty alcohols Chemical class 0.000 description 5
- 239000006260 foam Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 241001465754 Metazoa Species 0.000 description 3
- 239000003925 fat Substances 0.000 description 3
- 239000002736 nonionic surfactant Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- ALSTYHKOOCGGFT-KTKRTIGZSA-N (9Z)-octadecen-1-ol Chemical compound CCCCCCCC\C=C/CCCCCCCCO ALSTYHKOOCGGFT-KTKRTIGZSA-N 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 2
- 125000005037 alkyl phenyl group Chemical group 0.000 description 2
- 238000005108 dry cleaning Methods 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 229910052740 iodine Inorganic materials 0.000 description 2
- 239000011630 iodine Substances 0.000 description 2
- 229940055577 oleyl alcohol Drugs 0.000 description 2
- XMLQWXUVTXCDDL-UHFFFAOYSA-N oleyl alcohol Natural products CCCCCCC=CCCCCCCCCCCO XMLQWXUVTXCDDL-UHFFFAOYSA-N 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 241000283690 Bos taurus Species 0.000 description 1
- 208000010201 Exanthema Diseases 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000008953 bacterial degradation Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- MWKFXSUHUHTGQN-UHFFFAOYSA-N decan-1-ol Chemical compound CCCCCCCCCCO MWKFXSUHUHTGQN-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- YRIUSKIDOIARQF-UHFFFAOYSA-N dodecyl benzenesulfonate Chemical compound CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 YRIUSKIDOIARQF-UHFFFAOYSA-N 0.000 description 1
- 229940071161 dodecylbenzenesulfonate Drugs 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 201000005884 exanthem Diseases 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 235000003441 saturated fatty acids Nutrition 0.000 description 1
- 150000004671 saturated fatty acids Chemical class 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 230000002110 toxicologic effect Effects 0.000 description 1
- 231100000027 toxicology Toxicity 0.000 description 1
- 239000002351 wastewater 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
- C14C1/00—Chemical treatment prior to tanning
- C14C1/08—Deliming; Bating; Pickling; Degreasing
Definitions
- the invention relates to a method for producing leather and fur according to the preamble of claim 1.
- the removal of the natural fat from the animal hides is of crucial importance for the production of high quality leather and fur skins.
- Inadequately degreased skin material cannot be tanned or stained evenly in the desired manner.
- the end product is spotty in the case of leather and / or gets fat rashes during storage due to bacterial degradation of the fats and crystallization of the high molecular weight saturated fatty acids, with fur skins there is an unevenly colored velor side, in addition local hardening with risk of breakage of the fur leather can occur.
- solvent degreasing In solvent degreasing, a distinction is made between the use of solvents alone without water, possibly with the addition of small amounts of surfactants as so-called degreasing enhancers, and the use of solvents in emulsified form in aqueous solution.
- the first method is the so-called dry cleaning, which is usually used in suitable apparatus, especially for fur skins, in an already tanned form. This process cannot be used for large animal hides, such as cattle hides, due to the size of the apparatus required and the solvent emissions which cannot be prevented in the stand.
- alkylphenyl polyglycol ethers have been the top priority for decades. For eco / toxicological reasons, the use of these surfactants is voluntarily waived in the Federal Republic of Germany and some other countries.
- the use of alkyl polyglycol ethers has a similar degreasing effect to that of alkyl phenyl polyglycol ethers, they are easily biodegradable and do not lead to any environmentally / toxicologically harmful decomposition products.
- Mainly fatty alcohol sulfates, fatty alcohol polyglycol ether sulfates, alkane sulfonates and alkylauryl sulfonates are used as anionic surfactants.
- the surfactants and surfactant mixtures available in the individual stages lead to disturbances due to intensive foam formation.
- This foam formation occurs in the switch through to washing and in leather production predominantly in the liming and descaling.
- This foaming on the one hand, throws liquor out of the tanning vessels, and on the other hand the degreasing effect is greatly reduced by the strong reduction in the movement of the skins in a foamed compared to a foamless liquor. This results in an insufficient degreasing effect.
- a short-term removal of the foam can be achieved by adding defoamers, but these are dispersed after a short running time and thus lose their defoaming effect. In order to achieve sufficient degreasing effects, defoamers must be added again at short intervals. This significantly increases the cost of the degreasing process.
- foaming of the surfactant-containing fleets gives rise to problems in wastewater treatment. So it can e.g. B. by floating of the clarification floc in biological sewage treatment plants to malfunctions.
- the invention has for its object to provide a process for the production of leather and furs, with which an excellent degreasing can be achieved from the switch to the laundry without or with a minimal foam formation which does not disturb the degreasing process.
- fatty alcohol alkanol / alkenol
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)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
- Detergent Compositions (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung von Leder und Pelzen nach dem Oberbegriff des Anspruchs 1.The invention relates to a method for producing leather and fur according to the preamble of claim 1.
Die Entfernung des Naturfetts aus den tierischen Häuten ist für die Herstellung qualitativ hochwertiger Leder und Pelzfelle von ausschlaggebender Bedeutung. Ungenügend entfettetes Hautmaterial läßt sich weder in der gewünschten Weise gleichmäßig gerben noch färben. Das Endprodukt ist im Falle von Leder fleckig und/oder erhält durch bakteriellen Abbau der Fette und Kristallisation der hochmolekularen gesättigten Fettsäuren während der Lagerung Fettausschläge, bei Pelzfellen zeigt sich eine ungleichgemäßig gefärbte Veloursseite, zusätzlich können örtliche Verhärtungen mit Bruchgefahr des Pelzleders auftreten.The removal of the natural fat from the animal hides is of crucial importance for the production of high quality leather and fur skins. Inadequately degreased skin material cannot be tanned or stained evenly in the desired manner. The end product is spotty in the case of leather and / or gets fat rashes during storage due to bacterial degradation of the fats and crystallization of the high molecular weight saturated fatty acids, with fur skins there is an unevenly colored velor side, in addition local hardening with risk of breakage of the fur leather can occur.
Für die Entfettung der tierischen Häute stehen nach dem heutigen Stand der Technik zwei Verfahrensarten zur Verfügung: die Lösemittelentfettung und die Emulgatorentfettung.According to the current state of the art, two types of processes are available for degreasing animal hides: solvent degreasing and emulsifier degreasing.
Bei der Lösemittelentfettung unterscheidet man die Anwendung der Lösemittel in alleiniger Anwendung ohne Wasser, gegebenenfalls unter Zusatz geringer Tensidmengen als sogenannte Entfettungsverstärker und die Anwendung der Lösemittel in emulgierter Form in wäßriger Lösung.In solvent degreasing, a distinction is made between the use of solvents alone without water, possibly with the addition of small amounts of surfactants as so-called degreasing enhancers, and the use of solvents in emulsified form in aqueous solution.
Bei dem ersten Verfahren handelt es sich um die sogenannte Trockenreinigung, die in geeigneten Apparaten vor allem bei Pelzfellen meist in bereits gegerbter Form angewandt wird. Für Großtierhäute, wie Z. B. Rindshäute, ist dieser Prozeß, aufgrund der Größe der benötigten Apparate sowie der im Stand nicht zu verhindernden Lösungsmittel-Emissionen, nicht anwendbar.The first method is the so-called dry cleaning, which is usually used in suitable apparatus, especially for fur skins, in an already tanned form. This process cannot be used for large animal hides, such as cattle hides, due to the size of the apparatus required and the solvent emissions which cannot be prevented in the stand.
Entfettungsprozesse auf Grundlage des Einsatzes einer Lösungsmittel-Emulsion führen im Stand der Technik zu großen, nicht tolerierbaren ökologischen Belastungen. Halogenhaltige Kohlenwasserstoffe dürfen nach den heutigen Verordnungen in vielen Ländern nur noch in Spuren, d. h. in Mengen < 0,1 mg/l, in das Abwasser gelangen. Auch der Einsatz von Petroleumemulsionen als Entfettungsmedium führt zu einer Belastung der Umwelt und stellt zusätzlich ein Gefahrenpotential aufgrund der Brennbarkeit des Petroleums dar.Degreasing processes based on the use of a solvent emulsion lead to large, intolerable ecological burdens in the state of the art. According to the current regulations, hydrocarbons containing halogen are only allowed to get into the wastewater in traces in many countries, ie in amounts <0.1 mg / l. The use of petroleum emulsions as a degreasing medium also pollutes the environment and also represents a potential hazard due to the flammability of the petroleum.
Aus diesen vorweigend ökologischen Gründen wird neben der erwähnten Trockenreinigung der Pelzfelle überwiegend eine Emulgatorentfettung durchgeführt. Hierbei werden anionische und nichtionische Tenside sowie Mischungen beider Tensidtypen eingesetzt. Als nichtionische Tenside standen in ihrer Bedeutung über Jahrzehnte die Alkylphenylpolyglykolether an erster Stelle. Aus öko/toxikologischen Gründen wird freiwillig in der Bundesrepublik Deutschland und einigen anderen Ländern auf die Verwendung dieser Tenside verzichtet. Die Anwendung der Alkylpolyglykolether bringt im Vergleich zu den Alkylphenylpolyglykolethern ähnliche Entfettungseffekte, sie lassen sich leicht biologisch abbauen und führen zu keinen öko/toxikologisch bedenklichen Spaltprodukten.For these precedent ecological reasons, in addition to the dry cleaning of the fur skins mentioned above, emulsifier degreasing is predominantly carried out. Anionic and nonionic surfactants and mixtures of both types of surfactants are used. As nonionic surfactants, alkylphenyl polyglycol ethers have been the top priority for decades. For eco / toxicological reasons, the use of these surfactants is voluntarily waived in the Federal Republic of Germany and some other countries. The use of alkyl polyglycol ethers has a similar degreasing effect to that of alkyl phenyl polyglycol ethers, they are easily biodegradable and do not lead to any environmentally / toxicologically harmful decomposition products.
Als anionische Tenside werden vorwiegend Fettalkoholsulfate, Fettalkoholpolyglykolethersulfate, Alkansulfonate und Alkylaurylsulfonate verwendet.Mainly fatty alcohol sulfates, fatty alcohol polyglycol ether sulfates, alkane sulfonates and alkylauryl sulfonates are used as anionic surfactants.
Nach dem heutigen Stand der Technik führen die zur Verfügung stehenden Tenside und Tensid-Gemische in den einzelnen Stufen besonders der Lederherstellung und abgeschwächt der Pelzherstellung zu Störungen durch intensive Schaumbildung. Diese Schaumbildung tritt beginnend in der Weiche bis hin zur Wäsche und bei der Lederherstellung vorwiegend im Äscher und in der Entkälkung auf. Durch dieses Schäumen wird zum einen Flotte aus den Gerbgefäßen herausgeschleudert, zum anderen wird der Entfettungseffekt durch die starke Verminderung der Bewegung der Häute in einer verschäumten gegenüber einer schaumlosen Flotte stark verringert. Hierdurch ergibt sich ein ungenügender Entfettungseffekt. Eine kurzfristige Beseitigung des Schaums kann durch Zusatz von Entschäumern erzielt werden, jedoch werden diese nach einer bereits kurzen Laufzeit dispergiert und verlieren hierdurch ihre Entschäumerwirkung. Um zu ausreichenden Entfettungseffekten zu gelangen, muß in kurzen Zeitabständen ständig erneut Entschäumer zugesetzt werden. Hierdurch erhöhen sich die Kosten für das Entfettungsverfahren erheblich.According to the current state of the art, the surfactants and surfactant mixtures available in the individual stages, particularly in leather production and weakened fur production, lead to disturbances due to intensive foam formation. This foam formation occurs in the switch through to washing and in leather production predominantly in the liming and descaling. This foaming, on the one hand, throws liquor out of the tanning vessels, and on the other hand the degreasing effect is greatly reduced by the strong reduction in the movement of the skins in a foamed compared to a foamless liquor. This results in an insufficient degreasing effect. A short-term removal of the foam can be achieved by adding defoamers, but these are dispersed after a short running time and thus lose their defoaming effect. In order to achieve sufficient degreasing effects, defoamers must be added again at short intervals. This significantly increases the cost of the degreasing process.
Zusätzlich ergeben sich durch das Schäumen der tensidhaltigen Flotten Probleme in der Abwasseraufbereitung. So kann es z. B. durch ein Aufschwimmen der Klärflocke in biologisch arbeitenden Kläranlagen zu Störungen kommen.In addition, foaming of the surfactant-containing fleets gives rise to problems in wastewater treatment. So it can e.g. B. by floating of the clarification floc in biological sewage treatment plants to malfunctions.
Die Herstellung schaumarmer, vorwiegend nichtionischer Tenside, z. B. durch eine Verringerung des Polyglykolether-Anteils, führt zu einer schlechten Wasserlöslichkeit und hiermit zu einem schlechten Entfettungseffekt dieser Verbindungen.The production of low-foaming, predominantly nonionic surfactants, e.g. B. by reducing the polyglycol ether content leads to poor water solubility and thus to a poor degreasing effect of these compounds.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Herstellung von Leder und Pelzen zu schaffen, mit dem von der Weiche bis zur Wäsche eine ausgezeichnete Entfettung ohne oder mit einer minimalen, den Entfettungsprozeß nicht störenden, Schaumbildung erzielbar ist.The invention has for its object to provide a process for the production of leather and furs, with which an excellent degreasing can be achieved from the switch to the laundry without or with a minimal foam formation which does not disturb the degreasing process.
Ein diese Aufgabe lösendes Verfahren ist mit seinen kennzeichnenden Merkmalen im Hauptanspruch angegeben.A method which solves this problem is specified in the main claim with its characteristic features.
Vorteilhafte Ausgestaltungen des Verfahrens sind in den Unteransprüchen gekennzeichnet.Advantageous embodiments of the method are characterized in the subclaims.
Überraschend wurde gefunden, daß durch eine Kombination von niedrigethoxilierten Fettalkoholen (Alkyl/Alkenylpolyglykolethern) und Alkylbenzolsulfonaten sowie anderen anionischen Tensiden in den Prozeß-Stufen von der Weiche bis zur Wäsche eine ausgezeichnete Entfettung ohne oder mit einer minimalen, den Entfettungsprozeß nicht störenden, Schaumbildung erzielt werden konnte. Auch in der Abwasseraufbereitung zeigte sich beim Einsatz der obengenannten Mischung keinerlei durch Entfettungsflotten verursachte Schaumbildung.Surprisingly, it was found that a combination of low-ethoxylated fatty alcohols (alkyl / alkenyl polyglycol ethers) and alkylbenzenesulfonates as well as other anionic surfactants in the process stages from the switch to washing results in excellent degreasing without or with minimal foam formation which does not disturb the degreasing process could. In the wastewater treatment plant, too, there was no foaming caused by degreasing liquors when using the above mixture.
Durch den Zusatz von Fettalkohol (Alkanol/Alkenol) ist es möglich, hochkonzentrierte flüssige, klare Gemische aus diesen pastiösen, trüben Tensidmischungen zu erhalten. Diese Produkte können aufgrund ihrer flüssigen, einheitlichen Konsistenz in prozeßgesteuerten Anlagen problemlos zum Einsatz gelangen.The addition of fatty alcohol (alkanol / alkenol) makes it possible to obtain highly concentrated, liquid, clear mixtures from these pasty, cloudy surfactant mixtures. Due to their liquid, uniform consistency, these products can easily be used in process-controlled systems.
Im folgenden wird die Erfindung anhand von Beispielen näher erläutert:The invention is explained in more detail below with the aid of examples:
- 1.11.1
-
40 % Fettalkohol C₁₀.3 EO werden mit
2 % Fettalkohol C₁₀ und
10 96 Dodecylbenzolsulfonat (Ammoniumsalz) 80 % gemischt. Anschließend werden unter Erwärmen
48 % Wasser eingerührt.
Es ergibt sich ein flüssiges, blankes, gelbliches Produkt.40% fatty alcohol C₁₀.3 EO are with
2% fatty alcohol C₁₀ and
10 96 Dodecylbenzenesulfonate (ammonium salt) 80% mixed. Then be under heating
48% water stirred in.
The result is a liquid, bright, yellowish product. - 1.21.2
-
5 % C₁₂-Fettalkohol .4 EO,
10 % Oleylalkohol (Jodzahl 60/65) 5 EO,
10 % C₁₀-Alkohol .3 EO
3 % Oleylalkohol (Jodzahl 60/65)
mischen mit
72 % Alkansulfonat C₁₅; 40 %.
Es ergibt sich ein flüssiges, klares, farbloses Produkt Angaben in Gew.-%; EO = Ethylenoxid.5% C₁₂ fatty alcohol .4 EO,
10% oleyl alcohol (iodine number 60/65) 5 EO,
10% C₁₀ alcohol .3 EO
3% oleyl alcohol (iodine number 60/65)
mix with
72% alkanesulfonate C₁₅; 40%.
The result is a liquid, clear, colorless product, data in% by weight; EO = ethylene oxide.
Claims (10)
in den Prozessen der Weiche bis zur Wäsche mit einer Gesamtmenge von w = 0,01 - 0,05, bezogen auf Grüngewicht.Process for the production of leather and furs with degreasing from the switch to the laundry, characterized by the use of a combination of
in the processes of the switch to the washing with a total amount of w = 0.01 - 0.05, based on the green weight.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4009805A DE4009805C1 (en) | 1990-03-27 | 1990-03-27 | |
| DE4009805 | 1990-03-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0448948A1 true EP0448948A1 (en) | 1991-10-02 |
| EP0448948B1 EP0448948B1 (en) | 1994-12-21 |
Family
ID=6403154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91102123A Expired - Lifetime EP0448948B1 (en) | 1990-03-27 | 1991-02-14 | Process for the treatment of leather and hides |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0448948B1 (en) |
| DE (2) | DE4009805C1 (en) |
| ES (1) | ES2067779T3 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993018188A1 (en) * | 1992-03-12 | 1993-09-16 | Henkel Kommanditgesellschaft Auf Aktien | Degreasing agents |
| US5466263A (en) * | 1993-07-10 | 1995-11-14 | Hoechst Aktiengesellschaft | Process for dyeing fur skins with oxidation dyes |
| US8308821B2 (en) | 2003-12-17 | 2012-11-13 | Akzo Nobel N.V. | Process for treating animal skins |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4207806A1 (en) * | 1992-03-12 | 1993-09-16 | Henkel Kgaa | Biodegradable degreasing agent for skins, hides, pelts and leather - contg. major amt. of satd. fatty alcohol ethoxylate(s) and minor amt. of short chain fatty alcohol ethoxylate(s) with low deg. of ethoxylation |
| DE10005669A1 (en) * | 2000-02-09 | 2001-08-23 | Boehme Chem Fab Kg | Degreasing of pickled hides, especially sheepskins, using surfactants, especially nonionic adducts of ethylene oxide with 10-16C fatty alcohols |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB620783A (en) * | 1946-12-11 | 1949-03-30 | John Burchill | Improved process for degreasing hides and skins |
| FR2138080A1 (en) * | 1971-05-19 | 1972-12-29 | Polvarini Cesar | Simultaneous leather hydration and sealing - using mixt contg chlorohydrocarbon, non-ionic surfactant and an alkarylsul |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2807130A1 (en) * | 1977-03-01 | 1978-09-07 | Sandoz Ag | AMPHOTIC AND ANIONIC SURFACTANTS, THEIR PRODUCTION AND USE |
-
1990
- 1990-03-27 DE DE4009805A patent/DE4009805C1/de not_active Expired - Lifetime
-
1991
- 1991-02-14 EP EP91102123A patent/EP0448948B1/en not_active Expired - Lifetime
- 1991-02-14 DE DE59103949T patent/DE59103949D1/en not_active Expired - Fee Related
- 1991-02-14 ES ES91102123T patent/ES2067779T3/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB620783A (en) * | 1946-12-11 | 1949-03-30 | John Burchill | Improved process for degreasing hides and skins |
| FR2138080A1 (en) * | 1971-05-19 | 1972-12-29 | Polvarini Cesar | Simultaneous leather hydration and sealing - using mixt contg chlorohydrocarbon, non-ionic surfactant and an alkarylsul |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993018188A1 (en) * | 1992-03-12 | 1993-09-16 | Henkel Kommanditgesellschaft Auf Aktien | Degreasing agents |
| US5525120A (en) * | 1992-03-12 | 1996-06-11 | Henkel Kommanditgesellschaft Auf Aktien | Degreasing process |
| US5466263A (en) * | 1993-07-10 | 1995-11-14 | Hoechst Aktiengesellschaft | Process for dyeing fur skins with oxidation dyes |
| US8308821B2 (en) | 2003-12-17 | 2012-11-13 | Akzo Nobel N.V. | Process for treating animal skins |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2067779T3 (en) | 1995-04-01 |
| DE4009805C1 (en) | 1991-12-05 |
| DE59103949D1 (en) | 1995-02-02 |
| EP0448948B1 (en) | 1994-12-21 |
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