EP0349892B1 - Gerbverfahren mit hoher Chromauszehrung der Gerbflotten - Google Patents

Gerbverfahren mit hoher Chromauszehrung der Gerbflotten Download PDF

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Publication number
EP0349892B1
EP0349892B1 EP89111743A EP89111743A EP0349892B1 EP 0349892 B1 EP0349892 B1 EP 0349892B1 EP 89111743 A EP89111743 A EP 89111743A EP 89111743 A EP89111743 A EP 89111743A EP 0349892 B1 EP0349892 B1 EP 0349892B1
Authority
EP
European Patent Office
Prior art keywords
tanning
weight
chromium
aldehyde
acid
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.)
Expired - Lifetime
Application number
EP89111743A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0349892A3 (de
EP0349892A2 (de
Inventor
Hans-Herbert Dr. Friese
Emil Ruscheinsky
Rudolf Dr. Zauns
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.)
Henkel AG and Co KGaA
Original Assignee
Henkel AG and Co KGaA
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6358054&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0349892(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Henkel AG and Co KGaA filed Critical Henkel AG and Co KGaA
Publication of EP0349892A2 publication Critical patent/EP0349892A2/de
Publication of EP0349892A3 publication Critical patent/EP0349892A3/de
Application granted granted Critical
Publication of EP0349892B1 publication Critical patent/EP0349892B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C14C3/02—Chemical tanning
    • C14C3/04—Mineral tanning
    • C14C3/06—Mineral tanning using chromium compounds

Definitions

  • the invention relates to a chrome tanning process with which complete tanning is achieved and with which the chrome broths are practically completely exhausted.
  • the object of the invention was therefore to develop a chrome tanning process with which an even higher exhaustion of the tanning liquors is achieved in comparison with the known processes.
  • the invention is based on the surprising finding that the degree of exhaustion of tanning liquors is substantially improved if the tanning liquor is pre-dulled with basic agents in the presence of aldehyde and / or keto acids.
  • the invention accordingly relates to a process for chrome tanning with a high chromium exhaustion of the tanning liquors, which is characterized in that pelts pickled with formic acid and / or sulfuric acid are tanned with 0.5 to 12 percent by weight of chromium III salts, based on pelvis weight, which Pre-dull tanning liquor with base agents in the presence of aldehyde and / or keto acids to a pH between 3.6 and 4.3 and then blunted to a pH of 4.2 to 5.5 with alkali aluminum silicates. Pre-blunting is preferably carried out in the presence of glyoxylic acid.
  • the process according to the invention is distinguished by a very high degree of exhaustion of the chrome tanning agents, with the result that the concentration of the chromium III salts in the tanning liquor can be significantly reduced in comparison with known processes.
  • the residual chromium content of the exhausted tanning liquors is reduced to values less than 0.2 g Cr2O3 per liter of tanning liquor.
  • the quality of the wetblue which are subjected to the tanning process according to the invention is significantly improved.
  • the scar is finer and the wetblue color lighter than in conventional tanning processes, in which the blunting is carried out in the presence of dicarboxylic acids.
  • the tanning of pelts piqued with formic acid and / or sulfuric acid is masked in a manner known per se with chromium III salts, for example with chromium III sulfates, basic chromium III sulfates and / or with organic acids such as formic acid, acetic acid Chromium III salts carried out in a pimple bath or in a new fleet.
  • chromium III salts 0.5 to 12% by weight, preferably 3 to 6% by weight, based in each case on the pelvic weight, of chromium III salts are used.
  • chromium III salts 0.5 to 3.0 wt. such as alkyl sulfars containing 12-18 carbon atoms.
  • the tanning liquors preferably 0.3 to 0.7% by weight, based on the pelt weight, of base agents in the presence of preferably 0.3 to 4.0% by weight, particularly preferably 0.5 to 2.0% by weight .-%, based in each case on pelt weight, aldehyde and / or keto acids, such as pyruvic acid and / or glyoxylic acid.
  • base agents preferably 0.3 to 4.0% by weight, particularly preferably 0.5 to 2.0% by weight .-%, based in each case on pelt weight, aldehyde and / or keto acids, such as pyruvic acid and / or glyoxylic acid.
  • aldehyde and / or keto acids such as pyruvic acid and / or glyoxylic acid.
  • keto acids such as pyruvic acid and / or glyoxylic acid.
  • Magnesium oxide, dolomite, alkali metal carbonates, alkali metal bicarbonates are suitable as base agents and
  • the tanning liquor is dulled to pH values between 4.2 and 5.5, preferably to pH values between 4.5 and 5.0, with 0.5 to 3.0% by weight, preferably with 1.0 to 2.0% by weight, based in each case on the pelt weight, of alkali aluminum silicates.
  • the alkali aluminum silicates preferably sodium aluminum silicates, are added to the tanning liquors either in solid form or in the form of aqueous dispersions.
  • the alkali aluminum silicates are accessible by known processes, for example by the processes written in DE-OS 27 32 217.
  • the temperature of the tanning liquor after the addition of the alkali aluminum silicates is between 30 and 50 ° C., preferably between 35 and 45 ° C.
  • all skin types for example of beef, pork, goat or sheep, can be tanned.
  • Example 2 (comparison: DE-OS 35 16 842)

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)
EP89111743A 1988-07-06 1989-06-28 Gerbverfahren mit hoher Chromauszehrung der Gerbflotten Expired - Lifetime EP0349892B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3822823A DE3822823A1 (de) 1988-07-06 1988-07-06 Gerbverfahren mit hoher chromauszehrung der gerbflotten
DE3822823 1988-07-06

Publications (3)

Publication Number Publication Date
EP0349892A2 EP0349892A2 (de) 1990-01-10
EP0349892A3 EP0349892A3 (de) 1992-01-15
EP0349892B1 true EP0349892B1 (de) 1994-09-21

Family

ID=6358054

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89111743A Expired - Lifetime EP0349892B1 (de) 1988-07-06 1989-06-28 Gerbverfahren mit hoher Chromauszehrung der Gerbflotten

Country Status (12)

Country Link
US (1) US4938779A (ko)
EP (1) EP0349892B1 (ko)
JP (1) JPH0270800A (ko)
KR (1) KR0126916B1 (ko)
AR (1) AR245505A1 (ko)
AT (1) ATE111963T1 (ko)
BR (1) BR8903305A (ko)
DE (2) DE3822823A1 (ko)
ES (1) ES2058406T3 (ko)
FI (1) FI94149C (ko)
MX (1) MX170321B (ko)
TR (1) TR26613A (ko)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0583697A2 (de) * 1992-08-14 1994-02-23 Hoechst Aktiengesellschaft Verfahren zur Chromspar- und Chromfüllgerbung
DE4323123A1 (de) * 1993-07-10 1995-01-12 Hoechst Ag Verfahren zum Färben von Pelzfellen mit Oxidationsfarbstoffen
EP2853604A1 (en) 2013-09-30 2015-04-01 Rhodia Poliamida E Especialidades Ltda Tanning process
EP2853605A1 (en) * 2013-09-30 2015-04-01 Rhodia Poliamida E Especialidades Ltda Tanning process for obtaining leather
CN104109723B (zh) * 2014-07-18 2016-02-03 四川德华皮革制造有限公司 一种无甲醛无铬鞣制的毛革两用皮的制备方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3516842A1 (de) * 1985-05-10 1986-11-13 Hoechst Ag, 6230 Frankfurt Verfahren zur chromspargerbung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2732217A1 (de) * 1977-07-16 1979-02-01 Henkel Kgaa Verwendung feinteiliger wasserunloeslicher alkalialuminiumsilikate bei der lederherstellung
US4272242A (en) * 1977-07-16 1981-06-09 Henkel Kommanditgesellschaft Auf Aktien Use of water-insoluble aluminosilicates in tanning process for the production of leather

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3516842A1 (de) * 1985-05-10 1986-11-13 Hoechst Ag, 6230 Frankfurt Verfahren zur chromspargerbung

Also Published As

Publication number Publication date
DE3822823A1 (de) 1990-01-11
DE58908384D1 (de) 1994-10-27
JPH0270800A (ja) 1990-03-09
AR245505A1 (es) 1994-01-31
KR900001862A (ko) 1990-02-27
US4938779A (en) 1990-07-03
EP0349892A3 (de) 1992-01-15
ES2058406T3 (es) 1994-11-01
ATE111963T1 (de) 1994-10-15
BR8903305A (pt) 1990-02-13
FI94149C (fi) 1995-07-25
TR26613A (tr) 1994-04-05
FI893276A (fi) 1990-01-07
EP0349892A2 (de) 1990-01-10
KR0126916B1 (ko) 1997-12-26
FI893276A0 (fi) 1989-07-05
FI94149B (fi) 1995-04-13
MX170321B (es) 1993-08-16

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