The composition for the fatliquoring of leather

 

(57) Abstract:

The inventive composition for the fatliquoring of leather contains, by weight. % synthetic grease 10 - 40, emulsifier 30 - 40, the fraction of distillate production of bitumen viscosity at 50C for 30 - 50. The chemical composition of the fractions comprises a light aromatics 15,4 or 34.7 wt. % and the average aromatics 12,2 - to 16.8 wt. % . table 2.

The invention relates to the leather industry, in particular compositions for the fatliquoring of leather.

Known composition for the fatliquoring of leather, containing, by weight. % :

Synthetic fat

(oxidized methyl esters) 40-60

Emulsifier (leather pasta) 25-35

Mineral oil (spun) 15-25

The disadvantage of this composition is the relatively low quality of the fatliquoring of leather.

The closest in composition and effect is achieved is a composition containing, by weight. % : 10-40 synthetic based grease Emulsifier 30-40

Mineral oil

(oxidized petroleum oil) 30-50

This part of technological and allows the creasing of the skin. However, when using this composition are observed on the skin of dark spots, stains, furthermore, in the wastewater contains up to 1.4 wt. body fat%.

The task, which is directed to the processing of leather and the quality of these skins.

Technical result achieved when using this recipe: lack of grease in the wastewater; no dark spots on gerousia the surface of the skin; the possibility of partial recycling of waste bitumen production.

This technical result is achieved by the proposed qualitative and quantitative formulation of the composition, wt. % : 10-40 synthetic based grease Emulsifier 30-40 Mineral oil 30-50 - fraction of distillate production of bitumen with a viscosity of

V50- 5,1-15,6 mm2/s, having in its composition, wt. % :

Light aromatic

hydrocarbons with 1,49 < pD20< 1,53 15,4-34,7

The average aromatic

hydrocarbons with 1,53 < pD20< 1,59 12,2-16,8

A distinctive feature of the proposed structure is the content as mineral oil fractions of distillation bitumen production with V50- 5,1-15,6 mm2/s in the chemical composition of which includes the light aromatics - 15,4 of 34.6 wt. % average aromatics - 12,2-to 16.8 wt. % .

As a source of raw material was taken distillation bitumen production from the Ukhta refinery. This distillate was subjected to: dehydration; fractionation on the AVE with the conclusion of the faction required wascott the specifications specifications are given in table. 1.

To obtain a composition for the fatliquoring of leather were used as initial components:

synthetic fat GOST 11010-84

emulsifiers:

ethoxylated lard GOST 1045-73

leather emulsifying paste GOST 5344-82

sulfonated oils THAT 6-10-14-63-79

fraction distillation bitumen production.

Compositions for the fatliquoring of leather were prepared by mixing the components with their subsequent fusion at a temperature of 60-65aboutC for 5-7 minutes For the cooked part of the emulsifier at a temperature of 70aboutTo add 3-fold (calculated on the weight of the composition) of water.

the pH of the emulsion 7,5-8,0 regulate the addition of an aqueous ammonia solution.

The creasing of the skin was carried out as follows.

Leather, chrome for Shoe uppers, obtained by standard methods, it is greased proposed by the composition of the spent dye bath for skin black and pure water for lighter tones. The prepared composition is poured through the hollow shaft into the drum at one time. Liquid ratio is 1.2 to 1.5; temperature 60-65aboutWith, the processing time 60-90 min Flow rate of 6,0-7,0% by weight of shaved leather, considering the 100% fat.

Skin clean skin and applying heat air at a temperature of 60-65aboutC for 20-30 minutes Then through the hollow shaft of the drum fill prepared as described above, feeding the composition to a temperature of 60-65aboutWith in two doses with an interval of 15-20 minutes Total processing time of 2.5 hours, the Flow rate of 20-22% by weight of shaved leather, considering the 100% fat.

P R I m e R 1. Boxcalf leather for Shoe upper, received from the party hides rawhide on a standard methodology, zerouali the following composition, wt. % : Synthetic fat 40

Ethoxylated lard 30 Fraction distillation bitumen production (sample 1) 30

P R I m m e R 2. Boxcalf leather for Shoe upper, received from the party hides steer by standard methods, was jiroveci as in example 1 with the following composition, wt. % : Synthetic fat 25 Leather emulsifying paste 35

Fraction distillation bitumen production (sample 2) 40

P R I m e R 3. Skin clean skin for Shoe uppers, obtained by standard methods from the skins of byczyna, zerouali the following composition, wt. % : Synthetic fat 10 Sulfonated oils 40 Fraction distillation bitumen production (sample 3) 50

The properties of the skin treated with the proposed composition is shown in table. 2. (56) USSR Author's certificate N 777064, CL C 14 C 9/02, 1980.

USSR author's certificate N 1266862, class C otlichayushiesya fact, he as mineral oil contains a fraction of distillate production of bitumen viscosity of 5.1 - 15,6 mm2/g at 50oWith the chemical composition of which includes a light aromatics 15,4 or 34.7 wt. % and the average aromatics 12,2 - to 16.8 wt. per cent , in the following ratio, wt. % :

Synthetic grease 10 - 40

Emulsifier 30 - 40

Fraction distillation bitumen production 30 - 50

 

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