A method of obtaining a composition for the fatliquoring of leather and fur

 

(57) Abstract:

Usage: agents for leather and fur industry. The inventive method of making a composition for the fatliquoring of leather and fur includes oxidative sulfonation of natural fats or mixtures thereof with sodium bisulfite in the presence of surfactants and cobalt catalyst. Before oxidative sulfonation in fat type plasticizer. As the plasticizer used glycols in an amount of 10 to 40% by weight of fat. As the cobalt catalyst is used a solution of nitrate of cobalt. table 1.

The invention relates to methods for feeding means for the leather and fur industry.

Known methods for producing feeding means for skin and fur, which consists in the processing of synthetic hydrocarbon and natural raw materials sulfur-containing compounds, such as sulfuric acid, sulfuric anhydride, or salts of sulfurous acid. As a natural raw material used fish oil, various animal fat, vegetable oil.

According to the accepted standards of the quality of the thus obtained products, such as sulfonated vorva is authorized skin. Received agents used to prepare oiling compositions.

It is used in the leather and fur industries oiling compositions are stringent requirements on the stability and quality of the emulsions.

There is a method of making a composition for the fatliquoring of leather, including sulfonation fat sodium bisulfite in the presence of surfactants and oxygen-containing substances [1]

Also known is a method of obtaining a core component agents for leather and fur natural fats oxidation by air oxygen in the presence as catalyst of a salt of cobalt or manganese polyunsaturated fatty acids20-C26and sulphurization of the oxidized mass of sodium bisulfite at elevated temperatures in the presence of emulsifier and protein waste product of sulfonated fats [2]

Closest to the invention to the technical essence and the achieved result is a method of obtaining a composition for the fatliquoring of leather and fur, including oxidative sulforaphane natural fats or mixtures thereof with sodium bisulfite in the presence of surfactants and cobalt catalyst [3]

To improve the stability of the product in the method of making a composition for the fatliquoring of leather and fur, before oxidative sulfonation in fat or mixture type plasticizer, which is used as the glycol in the amount of 10-40% by weight of fat, and as a cobalt catalyst is used a solution of nitrate of cobalt.

This allows you to stabilize the process of sulfonation due to uniform distribution of the aqueous solution of salvagente in fat and to carry out the reaction of sulfonation more fully, and to exclude the possibility of resinification product, which significantly reduces the consumption of sodium bisulfite. Several times reduces the content of free of sulfates, which degrades the quality of the treated skin.

The method is as follows.

Example 1 (comparative). In the apparatus with a shirt, equipped with a stirrer and a bubbler air supply, load fish oil, add 0,0001 mA>C. With constant stirring for 2 h through the reaction mixture bubbled air. Then added 0.5% by weight of fats, surfactants, stirred for 15 min and add 30% by weight of fat from surfactants, stirred for 15 min and add 30% from fat mass aqueous solution of sodium bisulfite (37%). The oxidative sulfonation is carried out at 50oWith continuous stirring for 3 h

Example 2. Fish oil is loaded into a reactor equipped with a mixing device, the bubbler air supply and a heating jacket. Then served estimated number (10% by weight of fat) of ethylene glycol and emulsifier OP-10. With stirring the reaction mass injected a solution of nitrate of cobalt in an amount of 0.01% (calculated as metallic cobalt). The mixture is heated to 90 95oC and maintained oxidation for 1.5 hours Then add a solution of sodium bisulfite at a ratio of 1:0,2. Sulfonation is carried out at a temperature of 90 95oC. After 1.5 hours the process is stopped. In the resulting product the content of total fat 98% free of sulfates of 0.7% pH 6.0 to 6.5, the stability of the emulsion 4 h Treated skin obtained high quality.

The following examples was carried out similarly to example 2. At the same time as glenvale fish oil fat furry animals, animal fats both in pure form and with the addition of vegetable oil. The results are summarized in table.

As follows from the above examples, the proposed sposob has several advantages that are the result of a perfect mixture of glycols with fats and their complete dissolution in an aqueous solution of sodium bisulfite:

good contact of salvagente with fats;

reducing the time of sulfonation;

education sulfonic ethers of glycols;

reducing consumption of salvagente;

the increase in emulsifying and plasticizing ability of the product;

high quality composition.

A method of obtaining a composition for the fatliquoring of leather and fur, including oxidative sulfonation of natural fats or mixtures thereof with bisulfite sodium in the presence of surfactants and cobalt catalyst, characterized in that before oxidative sulfonation in fat type plasticizer, which is used as the glycol in the amount of 10 to 40 wt. fats, and as a cobalt catalyst is used a solution of nitrate of cobalt.

 

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EFFECT: facilitated procedure; increased amount of product.

1 tbl, 15 ex

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1 tbl, 19 ex

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1 ex

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2 tbl, 5 ex

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