CS273449B1

CS273449B1 - Method of leathers and furs degreasing

Info

Publication number: CS273449B1
Application number: CS52389A
Authority: CS
Inventors: Pavel Ing Csc Smejkal; Milos Ing Csc Jelinek
Original assignee: Pavel Ing Csc Smejkal; Milos Ing Csc Jelinek
Priority date: 1989-01-26
Filing date: 1989-01-26
Publication date: 1991-03-12
Also published as: CS52389A1

Abstract

The invention concerns the fur and leather industry and a method of degreasing leather and fur, particularly fleeces and skins in pickling state by the action of surfactants. The surfactant is a mixture of ethoxylated nonylphenols with a content of 12 to 15 ethoxyl groups per mol of nonylphenol and ethoxylated fatty alcohols with 3 to 5 ethoxyl groups in a ratio of 1:10 to 1:20 in a quantity of 0.l to 5 % by weight related to the weight of raw materials. The emulsion of natural fat is washed out in the next phase by a solution containing 0.01 to 10 % by weight sodium diphosphate.

Description

(57) Riešenia spadajúca do^odboru kožiarskaho priemyslu sa týká sposobu odtučňovania koži a kožušln,' zv^ášt ovčin a kozin v piklovanom stave posobením povrchovoaktivnych látok. Podstata riešenia spočívá v tom, že ako povrchovoaktívna látka slúži zmes etoxylovaných nonylfenolov s obsahom 12 až 15 etoxylových skupin na mol nonylfenolu a etoxyklovaných mastných alkoholov a 3 až 5 etoxylovými skupinami v pomere 1:10 až 1:20 v množstve 0,1 až 5 % hmot. vztlahnuté na hmotnoef suroviny, vzniknutá emulzia prirodného tuku sa v naaledujúcom kroku vypiera roztokom a obsahom 0,01 až 10 % hmot. difosforečnanu sodného.(57) The solution of the leather industry relates to the method of defatting skins and fur, especially sheep and goats in the polluted state by impregnating surfactants. The principle of the solution is that a surfactant is a mixture of ethoxylated nonylphenols containing 12 to 15 ethoxy groups per mole of nonylphenol and ethoxylated fatty alcohols and 3 to 5 ethoxy groups in a ratio of 1:10 to 1:20 in an amount of 0.1 to 5 % wt. based on the weight of the raw material, the resulting natural fat emulsion is washed in a next step with a solution containing from 0.01 to 10% by weight. sodium pyrophosphate.

CS 273449 BlCS 273449 Bl

CS 273 449 BlCS 273 449 Bl

Vynález ea týká spSsobu odtučňovania koži a kožušín, najma ovčin a kozin v piklovanom stave.The present invention relates to a method of defatting hides and skins, in particular sheep and goats, in the polished state.

V koželužnaj a kožušníckej technologii sa často spracovávajú kože a kožusiny v piklovanom stave, ktoré sa valmi tažko otučňujú. Pre odtučňovanie v kyslom prostředí sa volia rožne odtučňovacie prostriedky, ako napr. acylpolyglykolathery, alkylpolyglykoletharsulfáty at3. Uvedené typy povrchovo aktívnych látok sa musia používat v kyslom prostředí s vysokou iontovou silou, čo je spojené s potiažami pri odstraňovaní prírodných tukov, to znamená že pri bežne známých technológiach odtučňovania zostáva napr. až 5 % extrahovatelných látok v materiále, čo vyvolává potiaže v nadvazujúcich technologických operáciach. Obdobná situácia Je i pri odtučňovaní kozin a bravčovín. Či už v pilovaném stave alebo v roznych fázach rozpracovania.In tannery and fur technology, hides and skins are often processed in a spiked state, which are difficult to rotate by the walls. For defatting in an acidic environment, various defatting agents, such as e.g. acyl polyglycol ethers, alkyl polyglycol ethanesulfates and the like. Said types of surfactants have to be used in an acidic environment with high ionic strength, which is associated with difficulties in removing natural fats, i.e., in the case of conventional defatting technologies, e.g. up to 5% of extractables in the material, causing difficulties in downstream technological operations. A similar situation is also in defatting goats and pork. Whether in a sawmill or in various stages of processing.

Uvedené nedostatky odstraňuje sposob odtučňovania padla vynálezu, ktorého podstata spočiva v tom; že sa na surovinu pfisobi povr.chovoaktivnou látkou tvořenou zmesou etoxylovaných nonylfenolov s obsahom 12 až 15 etoxylových skupin na mol nonylfenolu a stoxylovými skupinami v pomere 1:10 až 1:20 v množstve 0,1 až 5 % hmot. vztiahnuté na hmotnost suroviny, vzniknutá emulzia prirodného tuku sa v nasledujúcom kroku vypiera roztokom s.obsahom 0,01 až 10 % hmot. difosforečnanu sodného.These deficiencies are eliminated by the defatting process of the invention, which is based on the principle of defatting; % by weight of said feedstock comprising a mixture of ethoxylated nonylphenols containing 12 to 15 ethoxy groups per mole of nonylphenol and stoxyl groups in a ratio of 1:10 to 1:20 in an amount of 0.1 to 5% by weight; based on the weight of the raw material, the resulting natural fat emulsion is washed in a next step with a solution containing 0.01-10% by weight. sodium pyrophosphate.

Sposob odtučňovania koži a kožušín podlá vynálezu je v porovnaní s doteraz používanou technologíou niekolkokrát účinsjší; napr. u ovčin až 10-krát, pričom účinnost odtučňovania s vypočítá zo stanovenia množstva extrahovatelných látok v koži před a po odtučňovaní. Přiklad 1The method of defatting hides and skins according to the invention is several times more effective than the technology used hitherto; e.g. in sheep, up to 10 times, the defatting efficiency s calculated from the determination of the amount of extractable substances in the skin before and after defatting. Example 1

Piklované ovčiny sa opracujú v koželužnej nádobě s I % hmot. povrchovoaktivnej látky, ktorú představuje zmes etoxylovaných nonylfenolov s obsahom 15 etoxylových skupin na mol nonylfenolu a etoxylovaných mastných alkoholov so 4 etoxylovými skupinami v pomere 1:15,The plated sheep are treated in a tanner container with 1% by weight. a surfactant consisting of a mixture of ethoxylated nonylphenols containing 15 ethoxy groups per mole of nonylphenol and ethoxylated fatty alcohols with 4 ethoxy groups in a 1:15 ratio,

Po 30 minútach pohybu sa přidá 250 % obj. vody teplej 30 °C s obsahom 1 % hmot. difosforečnanu sodného na hmotnost piklovaných ovčin. Po 120 minútach pohybu sa kvapalina zleje a surovina preperie vodou.After 30 minutes of movement, 250 vol. water at 30 ° C with a content of 1% by weight sodium pyrophosphate to the weight of pickled sheep. After 120 minutes of movement, the liquid is decanted and the raw material is washed with water.

Obsah zbytkového tuku v koži nepřesahoval 2 % hmot.The residual fat content of the skin did not exceed 2% by weight.

Přiklad 2Example 2

Bravčovice sa v priebehu mořenia opracujú povrchovoaktívnou látkou v množstve 1 % hmot. na hmotnost holiny, pričom povrchovoaktívnu látku představuje zmes etoxylovaných nonylfenolov s obsahom 12 etoxylových skupin na mol nonylfenolu a etoxylovaných mastných alkoholov so 4 etoxylovanými skupinami v pomere 1:20. Po 2 hodinách pohybu sa přidá 250 % obj. vody teplej 35 °C s obsahom 5 % hmot. difosforečnanu sodného na hmotnost piklovaných bravčovíc. Po 30 minútach pohybu sa kvapalina zleje a surovina preperie vodou.Pigs are treated with a surfactant in an amount of 1% by weight during pickling. The surfactant is a mixture of ethoxylated nonylphenols containing 12 ethoxy groups per mole of nonylphenol and ethoxylated fatty alcohols with 4 ethoxylated groups in a ratio of 1:20. After 2 hours of movement, 250 vol. water at 35 ° C with a content of 5% by weight sodium pyrophosphate to the weight of the pork pigs. After 30 minutes of movement, the liquid is decanted and the raw material is washed with water.

Claims

OBJECT OF THE INVENTION

A method of defatting hides and skins of sheep and goats, in particular, in a pictogram, by surfactants, characterized in that the raw material is treated with a surfactant consisting of a mixture of ethoxylated nonylphenols containing 12 to 15 ethoxy groups per mole of nonylphenol and ethoxylated ethoxylated fatty alcohols. % in a ratio of 1:10 to 1:20 in an amount of 0.1 to 5 wt. based on the weight of the raw material, the resulting natural fat emulsion is washed in a next step with a solution containing 0.01-10 wt. sodium pyrophosphate.