DE882889C - Process for de-liming bare stones - Google Patents

Process for de-liming bare stones

Info

Publication number
DE882889C
DE882889C DEB6961D DEB0006961D DE882889C DE 882889 C DE882889 C DE 882889C DE B6961 D DEB6961 D DE B6961D DE B0006961 D DEB0006961 D DE B0006961D DE 882889 C DE882889 C DE 882889C
Authority
DE
Germany
Prior art keywords
liming
acid
acids
pelts
stones
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
Application number
DEB6961D
Other languages
German (de)
Inventor
Hans Dr Krzikalla
Hermann Dr Loewe
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Priority to DEB6961D priority Critical patent/DE882889C/en
Application granted granted Critical
Publication of DE882889C publication Critical patent/DE882889C/en
Expired 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

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 zum Entkälken von Blößen Die Entkälkung von Blößen wird vorwiegend mit Ameisensäure, Essigsäure, Milchsäure oder Gemischen dieser Säuren durchgeführt, da bei diesen die Schwellungsgefahr für die, Blöße durch das bei stärkeren Säuren eintretende rasche Fallen des pH-Wertes, besonders innerhalb der Blöße, gering ist. Es haftet ihnen jedoch der Nachteil einer geringen Entkälkungsgeschwindigkeit an.Process for deliming pelts The deliming of pelts is mainly with formic acid, acetic acid, lactic acid or mixtures of these acids carried out, because with these the risk of swelling for the, nakedness by the with stronger ones Acids, rapid fall in pH, especially within the nakedness, slight is. However, they have the disadvantage of a slow descaling speed at.

Es wurde nun gefunden, daß sich Sulfocarbonr säuren, -die leichtlösliches Calciumsalze zu bilden vermögen, sehr gut zum Entkälken von Blößen verwenden lassen. Diese Säuren entkälken .schnell bei nur geringer Schwellungsgefahr. Als geeignete Sulfocarbonsäuren seien z. B. Sulfoessigsäure und Sulfobuttersäure, genannt. Auch Arylsulfocarbo,nsäuren, soweit sie keine gerbenden Eigenschaften besitzen, sind. anwendbar; als solche seien beispielsweise Sulfobenzoesäure und Sulfophthalsäure angeführt. Es können auch Sulfocarbonsäuren, die weitere -wassarlöslichmachende, Gruppen, z. B. Hydroxyl-oderÄthergruppen, enthalten, herangezogen werden, wie z. B. Sulfosalicylsäure. Die Sulfocarbonsäuren können auch ganz oder teilweise mit Ammoniak oder Aminen neutralisiert angewandt werden. Beispiel r Mit einem Gemisch aus Calciumhydroxyd und Natriumsulfid geäscherte Ziegenblößen werden mit o,6%. Sulfoessigsäure behandelt. Es tritt eine rasche Entkälkung ein.It has now been found that sulfocarboxylic acids, -the easily soluble Capable of forming calcium salts, can be used very well for decalcifying pelts. These acids decalcify quickly with little risk of swelling. As suitable Sulfocarboxylic acids are z. B. sulfoacetic acid and sulfobutyric acid, called. Even Arylsulfocarbo, nic acids, provided they have no tanning properties. applicable; such are, for example, sulfobenzoic acid and sulfophthalic acid cited. There can also be sulfocarboxylic acids, the other water-solubilizing, Groups, e.g. B. hydroxyl or ether groups, can be used, e.g. B. sulfosalicylic acid. The sulfocarboxylic acids can also be wholly or partially with Ammonia or amines neutralized can be used. Example r With a mixture Goat pelts, ashes from calcium hydroxide and sodium sulfide, are used with o.6%. Treated sulfoacetic acid. There is rapid deliming.

Beispie12 Mit Calciumhydroxyd und Natriumsulfi-d geäscherte Rindblöße wird mit 0,75010 Sulfophthalsäure behandelt. Es tritt Entkälkung ein, ohne daß sich Schwellungserscheinungen bemerkbar machen.Beispie12 Beef pelts that are ashed with calcium hydroxide and sodium sulfide are treated with 0.75010 sulfophthalic acid. Limescale occurs without any noticeable swelling.

Claims (1)

PATENTANSPRUCH: Verfahren zum Entkälken von Blößen, gekennzeichnet durch die Verwendung nicht gerbender Sulfo-carbonsäuren:, die leichtlösliche Calciumsalze bilden.PATENT CLAIM: Process for decalcifying pelts, marked through the use of non-tanning sulfo-carboxylic acids: the easily soluble calcium salts form.
DEB6961D 1942-10-03 1942-10-03 Process for de-liming bare stones Expired DE882889C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB6961D DE882889C (en) 1942-10-03 1942-10-03 Process for de-liming bare stones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB6961D DE882889C (en) 1942-10-03 1942-10-03 Process for de-liming bare stones

Publications (1)

Publication Number Publication Date
DE882889C true DE882889C (en) 1953-08-31

Family

ID=6955004

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB6961D Expired DE882889C (en) 1942-10-03 1942-10-03 Process for de-liming bare stones

Country Status (1)

Country Link
DE (1) DE882889C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1149131B (en) * 1953-09-04 1963-05-22 Roehm & Haas Gmbh Process for the production of tanned bare
DE1207037B (en) * 1960-11-12 1965-12-16 Hoechst Ag Process for liming ashed hides and pelts
DE1222618B (en) * 1961-08-08 1966-08-11 Basf Ag Manufacture of dry pimples

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1149131B (en) * 1953-09-04 1963-05-22 Roehm & Haas Gmbh Process for the production of tanned bare
DE1207037B (en) * 1960-11-12 1965-12-16 Hoechst Ag Process for liming ashed hides and pelts
DE1222618B (en) * 1961-08-08 1966-08-11 Basf Ag Manufacture of dry pimples

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