EP0575927A3 - - Google Patents

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Publication number
EP0575927A3
EP0575927A3 EP19930109846 EP93109846A EP0575927A3 EP 0575927 A3 EP0575927 A3 EP 0575927A3 EP 19930109846 EP19930109846 EP 19930109846 EP 93109846 A EP93109846 A EP 93109846A EP 0575927 A3 EP0575927 A3 EP 0575927A3
Authority
EP
European Patent Office
Prior art keywords
liming
liquor
skins
hides
processes
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
EP19930109846
Other versions
EP0575927B1 (en
EP0575927A2 (en
Inventor
Juergen Dr. Christner
Tilman Dr. Taeger
Gertrud Wick
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.)
Roehm GmbH Darmstadt
Original Assignee
Roehm GmbH Darmstadt
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 Roehm GmbH Darmstadt filed Critical Roehm GmbH Darmstadt
Publication of EP0575927A2 publication Critical patent/EP0575927A2/en
Publication of EP0575927A3 publication Critical patent/EP0575927A3/xx
Application granted granted Critical
Publication of EP0575927B1 publication Critical patent/EP0575927B1/en
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
    • C14C1/06—Facilitating unhairing, e.g. by painting, by liming
    • 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
    • C14C1/06—Facilitating unhairing, e.g. by painting, by liming
    • C14C1/065—Enzymatic unhairing

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)
  • Cosmetics (AREA)
  • Adornments (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Glass Compositions (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Coloring (AREA)
  • Gloves (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to processes for liming skins and hides using proteolytic enzymes in an aqueous alkaline liquor. The liming liquor has a pH within the range from 10 to 14 and contains, at one and the same time, thiourea dioxide and alkaline proteases having elastase activity.
EP93109846A 1992-06-25 1993-06-21 Process for liming skins and hides Expired - Lifetime EP0575927B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4220838A DE4220838A1 (en) 1992-06-25 1992-06-25 Process for the ashing of hides and skins
DE4220838 1992-06-25

Publications (3)

Publication Number Publication Date
EP0575927A2 EP0575927A2 (en) 1993-12-29
EP0575927A3 true EP0575927A3 (en) 1994-02-09
EP0575927B1 EP0575927B1 (en) 1996-08-28

Family

ID=6461801

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93109846A Expired - Lifetime EP0575927B1 (en) 1992-06-25 1993-06-21 Process for liming skins and hides

Country Status (10)

Country Link
US (1) US5508195A (en)
EP (1) EP0575927B1 (en)
JP (1) JP3211914B2 (en)
KR (1) KR100256152B1 (en)
AT (1) ATE141959T1 (en)
BR (1) BR9302644A (en)
DE (2) DE4220838A1 (en)
DK (1) DK0575927T3 (en)
ES (1) ES2091523T3 (en)
MX (1) MX9303809A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4332785A1 (en) * 1993-09-27 1995-03-30 Roehm Gmbh Improved enzyme-assisted liming process
US6340458B1 (en) * 1999-11-19 2002-01-22 Reva Amir Use of enzymes for skin expansion
JP2001164300A (en) * 1999-12-06 2001-06-19 Daiwa Kasei Kk Enzymic depilatory in hide tanning and method for enzymic dehairing
US20030061666A1 (en) * 2001-05-01 2003-04-03 Blc Leather Technology Centre Limited Leather Trade House Leather processing
US6777219B2 (en) * 2002-03-13 2004-08-17 Council Of Scientific And Industrial Research Process for the preparation of alkaline protease

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2047738A (en) * 1979-04-28 1980-12-03 Roehm Gmbh Treating skins and hides
EP0326059A2 (en) * 1988-01-29 1989-08-02 Röhm GmbH Liming process for obtaining hair

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1011668B (en) * 1973-04-28 1977-02-10 Roehm Gmbh PROCEDURE OF PURGE OF THE SKINS
AT381952B (en) * 1985-04-03 1986-12-29 Oesterr Chem Werke METHOD FOR ASHING SKIN AND SKIN
AT388387B (en) * 1987-09-02 1989-06-12 Oesterr Chem Werke METHOD FOR REFURBISHING BLOWS AND COLUMNS
DE3922748B4 (en) * 1989-07-11 2006-01-05 Röhm GmbH & Co. KG Enzymatic soft process

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2047738A (en) * 1979-04-28 1980-12-03 Roehm Gmbh Treating skins and hides
EP0326059A2 (en) * 1988-01-29 1989-08-02 Röhm GmbH Liming process for obtaining hair

Also Published As

Publication number Publication date
DE4220838A1 (en) 1994-01-05
JPH0657300A (en) 1994-03-01
US5508195A (en) 1996-04-16
ES2091523T3 (en) 1996-11-01
JP3211914B2 (en) 2001-09-25
KR940005808A (en) 1994-03-22
EP0575927B1 (en) 1996-08-28
DE59303551D1 (en) 1996-10-02
MX9303809A (en) 1994-01-31
KR100256152B1 (en) 2000-06-01
EP0575927A2 (en) 1993-12-29
ATE141959T1 (en) 1996-09-15
BR9302644A (en) 1994-01-11
DK0575927T3 (en) 1996-09-30

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