EP0448948A1 - Procédé pour la préparation de cuir et de peaux - Google Patents

Procédé pour la préparation de cuir et de peaux Download PDF

Info

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
Authority
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
Application number
EP91102123A
Other languages
German (de)
English (en)
Other versions
EP0448948B1 (fr
Inventor
Dieter Graf
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.)
Dr Th Boehme KG Chemie Fabrik GmbH and Co
Original Assignee
Dr Th Boehme KG Chemie Fabrik GmbH and Co
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 Dr Th Boehme KG Chemie Fabrik GmbH and Co filed Critical Dr Th Boehme KG Chemie Fabrik GmbH and Co
Publication of EP0448948A1 publication Critical patent/EP0448948A1/fr
Application granted granted Critical
Publication of EP0448948B1 publication Critical patent/EP0448948B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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)
EP91102123A 1990-03-27 1991-02-14 Procédé pour la préparation de cuir et de peaux Expired - Lifetime EP0448948B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4009805A DE4009805C1 (fr) 1990-03-27 1990-03-27
DE4009805 1990-03-27

Publications (2)

Publication Number Publication Date
EP0448948A1 true EP0448948A1 (fr) 1991-10-02
EP0448948B1 EP0448948B1 (fr) 1994-12-21

Family

ID=6403154

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91102123A Expired - Lifetime EP0448948B1 (fr) 1990-03-27 1991-02-14 Procédé pour la préparation de cuir et de peaux

Country Status (3)

Country Link
EP (1) EP0448948B1 (fr)
DE (2) DE4009805C1 (fr)
ES (1) ES2067779T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993018188A1 (fr) * 1992-03-12 1993-09-16 Henkel Kommanditgesellschaft Auf Aktien Degraissants
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4207806A1 (de) * 1992-03-12 1993-09-16 Henkel Kgaa Biologisch vertraegliche entfettungsmittel fuer die herstellung von ledern und pelzen
DE10005669A1 (de) * 2000-02-09 2001-08-23 Boehme Chem Fab Kg Verfahren zum Entfetten von Fellen

Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2807130A1 (de) * 1977-03-01 1978-09-07 Sandoz Ag Amphotere und anionische tenside, deren herstellung und verwendung

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993018188A1 (fr) * 1992-03-12 1993-09-16 Henkel Kommanditgesellschaft Auf Aktien Degraissants
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
EP0448948B1 (fr) 1994-12-21
DE4009805C1 (fr) 1991-12-05
ES2067779T3 (es) 1995-04-01
DE59103949D1 (de) 1995-02-02

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