SU670613A1 - Method of producing composition for greasing of leather - Google Patents

Description

METHOD OF OBTAINING A COMPOSITION FOR FATING

(54)

SKIN

soybean, etc.) or various fats (fish, sea animals, animals) are mixed with unwashed substances, heat the mixture to a temperature of 90-95 ° C, and 0.05-0.1 weight is added with stirring. % (in terms of metallic cobalt) of cobalt linoleate, dissolved in oil. With constant stirring, air is bubbled for 3–4 hours, then ethoxylated fatty acids or alcohols are introduced, stirring is continued for 10–15 minutes, then an aqueous solution of sodium bisulfite (37%) is added in the fat: bisulfite ratio sodium from 1: 0.3 to 1: 1 depending on the type of fat used for sulfonation. Sulfuration is carried out with vigorous stirring to obtain a sulphonated product, 1% of whose emulsion has a dispersion of 1-3 microns and resistance to electrolyte solutions for at least 2 hours.

A grease paste is obtained which is well emulsified in water and gives an emulsion resistant to electrolyte solutions. The paste is odorless, it is used in the combined processes of tanning, pickling and fattening, and when processing fur skins and skins, it gives good softness and fullness of leather.

Example 1. Refined cottonseed oil is hydrogenated on a nickel-silica gel catalyst at a temperature of 200 ° to obtain a product with a melting point of 28.5 ° C and a saturated acid content of 30.4%. At the end of the hydrogenation, the nickel-silica gel catalyst is separated from the fat by filtration. Next, they mix hydrogenated liquor and unwashed substances, separated from foliar sulfate soap and have the following composition,%;

Alcohols38

Hydroxy derivatives15

Acids30

Other unwashed

substances17

A mixture of fat and unwashed substances is loaded into a stainless steel reactor, cobalt linoleate dissolved in oil in an amount of 0.1 weight. % (in terms of metallic cobalt) to the weight of fat, heat the mixture to 93 ° C. Open the air supply under the fat layer and mix the mixture for 4 hours. Then oxyethylated fatty acids are added to the fat mixture, stirred for 10 minutes and an aqueous solution of sodium bisulfite (37%) in a fat: sodium bisulfate ratio of 1: 1 is added. at a temperature of 93 ° C to obtain a sulfated product, the dispersion of the emulsion which was 1-2.5 microns.

The stability of the emulsion for 2 hours. This allowed the use of the paste in the combined herodess of processing fur and leather. The finished fur products were of high quality, soft, filled, supple.

Example 2. Fish oil is mixed with neat-washed substances extracted from foliar sulfate soap and having the composition as in Example 1. The mixture is loaded into a stainless steel reactor equipped with a stirrer.

device, a bubbler for air supply and a heating coil.

With stirring, 0.1% (by weight of the mixture) of cobalt linoleate (in terms of metallic cobalt) is introduced into the reactor,

air bubbling is opened, heated to a temperature of 90 ° C and stirred for 3 hours until the refractive index increases at 60 ° C by 0.0012 ± 2 units. Then, ethoxylated fatty alcohols (syntanol DS-10) and an aqueous solution of sodium bisulfite are added in a ratio of oxidized product: a solution of sodium bisulfite of 1: 0.3. The sulfonation is carried out at a temperature of 90 ° C.

After 1.5 hours of sulfonation, the process is stopped, a sulfonated product is obtained, the dispersion of the emulsion of which was 1-2.5 microns. The stability of the 1% emulsion of the resulting paste in solution

electrolytes was 2 h.

The finished crust was used to fatten a sheepskin. The resulting fur products were of high quality. Example 3. Pork fat (fatty),

having a melting point of 14.8 ° C is shifted with unwashed substances obtained as a by-product in the production of synthetic fatty acids and having the following composition,%:

alcohols 34; hydroxy derivatives 15; acids 1; other uncleanable substances 50.

A mixture of fat and unwashed substances is loaded into the reactor, precipitated cobalt linoleate is added in an amount of 0.05% (in

in terms of metal cobalt) based on the weight of the mixture, then stirred at 95 ° C for 4 hours. Oxyethylated fatty acids are then added, mixed for 15 minutes and an aqueous solution of sodium bisulfite is added in a fat mixture: sodium bisulfite solution of 1.0: 0.5 Sulfonation is carried out at a temperature of 95 ° C for 4 hours to obtain a product whose dispersion of the emulsion

was 1-3 microns. The stability of the 1% emulsion of the resulting paste in the electrolyte solution was 3 h. The paste was tested by greasing chrome leathers. Leather samples are obtained having a good

lived, soft, fullness. The proposed method allows to intensify the process of sulfonation of fats and to improve the quality of lamb paste and, accordingly, the quality of the finished fur and leather products.

Claims (2)

1. Handbook of fur and sheepskin fur industry, vol. 1. M., 1970. 2. Patent of the GDR No. 85611, cl. 28 a, 9, pub. 1974.