SU1356431A1 - Method of producing proteinous surfactant for leather - Google Patents

Abstract

The invention relates to surface-active substances (surfactants), in particular proteinaceous (B-surfactants) used for leather in light industry. Improving the quality of B-surfactants and increasing their solubility, wetting. abilities and giving them proteoliti-. The activity is achieved by carrying out heat treatment of annealed tanning wastes of tannery production in the presence of another hydrolyzing agent — waste of soap production, taken in an amount of 40-80Z from the mass of tannery waste. The latter contain, in wt.%: Sodium soaps of the limiting and unsaturated fatty acids of the fraction - C, sodium hydroxide 2-4, - the rest. B-surfactants possess fermentative properties and a wide range of properties. Allowing to increase the strength of the skin, compact the facial layer, change the elastic properties of the skin. In addition, the diphilic character of B-surfactant has a positive effect on both maintaining hygiene and reducing the permeability of the skin. 1 tab. t ,. Sche SP with j: with "./i

Description

1 13

This invention relates to an improved method for producing a protein ietoro surfactant for skin and can be used in light industry.

The purpose of the invention is to improve the quality of protein surfactants, increase their solubility, wetting ability and impart proteolytic activity to them. .

N e and e r 1. Into the Timokhin boiler, pumped wastes (2000 kg) with water were pumped into the ash pit, then water was poured through a false bottom, and the soap was discharged into the boiler (TU 17 RSFSR L -8-20-84) containing wt.% g

Sodium hydroxide 2

Soaps C

to- 50

H

soo

ten

Water ----- 88

The consumption of the hydrolyzing substance (soap production waste) is 80% of the mass of goleevy waste. The contents of the boiler were heated to 96 ° C and the wastes were hydrolyzed with a simultaneous modification of the hydrolysis products with radacals, the COO was stirred for 5 hours, while 70% of the finished product was mixed, and they were poured into the container. 30% of the hydrolyzate was dried on roller dryers (T shafts) to a moisture content of the finished product of 0%. Dry protein surfactant packaged in Kraft bags. Mol weight 720o.

Example 2, Under the conditions of example 1, but the hydrolyzing solution contains, wt.%

Technical hydro, - sodium hydroxide (100%) 3 Household soap

: tD.2o, H ,,. ,, COONa

12

(100%)

Water 85

Mol weight 940.

Example 3. Under the conditions of example, but the hydrolyzing solution contains, in% by weight;

Technical sodium hydroxide (100%) 4

Console, H ,, j, COONa, 15 Ёoda81

Mol weight 560.

Example4. Under the conditions of application, but the hydrolyzing solution contains, wt.%:

Sodium hydroxide 3

0

five

0

 C.ia ..--,

2

COONa

13

8A

Water

Mol weight 400.

The ratio between the sharp cut, split, and flesh is: Example 1 - 1: 1: 1, Example 2 - 0: 1: 1, Example 3 - 1: 0: 1, Example 4 - 1: 1: 0, Lree the content in sodium hydrolysis solution of sodium hydroxide less than 22 hydrolysis does not take place completely, but with more than 4% the pH of the hydrated product of type 1, which requires its neutralization. By increasing

5 contents of soaps in the solution up to 17-201, ready proteinaceous surfactant. Has non-recirculating soap that needs to be removed, and when the content of soaps is less than 10%, the surface-active properties of the finished product are sharply reduced.

. EXAMPLE 5. The round de-ashing treatment is treated under the conditions of Example 3, the flow rate of the hydrolyzing solution is 40%.

The properties of protein surfactants (liquid), obtained by implementing the method shown in the table.

Dry protein surfactants were dissolved (in quantities necessary for analyzes) to the dry matter content prior to the dehydration process, and analyzes showed that the dehydration process of the protein surfactant does not affect its properties. Analyzes of liquid and dry protein surfactants were carried out immediately after preparation and after storage for 3 months. No significant property change from storage was detected. Thanks to a large assortment.

0 starting materials, which, when preparing a protein surfactant, are completely converted into a water-soluble state, the proposed method provides a protein surfactant with a wide range of properties for various purposes - increasing skin strength, thickening the facial layer of the skin, changing the w properties. The lipophilic character of the proposed surfactant has a positive effect on the preservation of the basic valuable quality of the skin -. hygiene - and helps to improve water resistance and reduce the permeability of the skin. The ability to bind with hides, semi-finished products, and leather reduces the fragrance of the leather. The resulting protein

0

Claims (1)

Surfactant has both enzymatic properties and the properties of surface-active substances. Invention Formula A method for producing a protein surfactant for skins by thermally treating debrisized hide of the leather industry in the presence of a hydrolyzing agent, characterized in that, in order to improve the quality of the protein surfactant, Dry residue pH Proteolytic activity year g / l ml to NaOH mn / m 23.66 26.126.028, G15J5.3 172.54 174.2176.3191.4106102.7 9.0 9,510.29,510,38,82 0.1 0,24 0, 280,32О Surface tension of solutions at protein concentration; solubility, wetting ability and proteolytic activity, as a hydrolyzing reagent use waste soap production in the amount of 40-80% by weight of leather waste, containing, wt.%: Sodium soaps limit and unsaturated fatty acid fraction Cfc - С „Sodium hydroxide.