CS199020B1 - Drilling polymer irrigation - Google Patents

Abstract

Drilling polymer fluid based on glucan or mannoglucan or glucan cellulose polymer. The purpose of the invention is to increase the crosslinking of the polymer so that its efficiency, i.e. reduction of viscosity during fluid flow and its re-increase in the quiescent phase, is higher. The fluid contains 5 to 30% by weight of basic chromium sulfate, based on the dry weight of the polymer. The invention is particularly useful in fast and intensive drilling of deep boreholes.

Description

SUMMARY OF THE INVENTION The present invention provides a method for obtaining fur from genuine tanned fur, in particular for headgear, by utilizing shredded or tanned fur.

Hitherto known methods of obtaining fur from tanned fur, their trim or wastes are carried out by trimming the hair either from whole tanned fur or cutting the hair from pieces of fur adhered to paper or other support. This method is unproductive and reduces the length of the coat ·

Furthermore, various methods of mechanically disintegrating tanned fur are known, but the fibers are damaged and shortened, which are then unusable in the hat industry.

These disadvantages are eliminated by the method of obtaining fur from real tanned fur according to the invention, characterized in that the tanned fur or its cuttings or its waste is broken up in an aqueous solution of inorganic acid at a temperature of 70 to 100 ° C for 1 to 4 hours. As acids ae, sulfuric, hydrochloric, nitric and phosphoric acids can be used, in concentrations of 0.5 to 8.0 g / l. After treatment of the fur in a hot acid bath, the tanning effect is impaired and the fur is subjected to dewatering and disintegration treatment. The disintegration ae is carried out in an undried state in the wet state, most preferably by mechanical means.

The CALLAQAN type disintegrator is well suited for opening. Y undried wet condition easily loosens without damage and shortens the coat.

199 020

189020 dries and cleans dirt by blowing air.

In the examples of practical use, the method of obtaining hair from different types of fur is explained.

Example 1

In a basket of the ONNC staining apparatus, 100 kg of tan rabbit pieces and the apparatus are loaded and filled with a bath of 4 g / l sulfuric acid. The bath is heated to a temperature of 92 to 100 ° C under constant circulation and maintained at this temperature for 2 to 1 hour. After this time, the molten fur mass is dewatered by centrifugation and, when wet, is developed on a CALLAGAN-type disintegrator. The loosened raw material aa is dried in a FLEISSNBR type tumble dryer and cleaned in a cap blowing machine. This provides a coat suitable for hat making.

Example 2

100 kg of tanning chips are treated in the same manner as in Example 1 and the obtained fur is used as an ingredient in a hat blend.

Example 3

10Q kg of tanned sheepskin cuts ee is treated in the same way as in Example 1 and the obtained fur is used as an additive in hat wool blends.

The method of obtaining the hair according to the invention replaces the scarce basic raw material for the hat industry, i.e. rabbit and rabbit fur hair. Cuttings and waste of leather from various branches of the leather industry can be used.

Claims (6)

SUBJECT OF THE INVENTION Method for obtaining fur from genuine tanned fur, in particular for hat-making, characterized in that the tanned fur or scrap or scrap thereof is broken up in an aqueous solution of inorganic acid at a concentration of 0,5 to 8 g / l at a temperature of 70 to 100 ° C for 1 to 4 hours, load a and freely and finally complete · 2. The process of claim 1 wherein the inorganic acid is sulfuric, hydrochloric, nitric, and phosphoric acid. 3. A method according to claim 1, characterized in that the disintegration is carried out in the wet state without drying 4. The method according to claim 1, characterized in that the disaggregation is carried out mechanically. Method according to claim 1, characterized in that it is dried and cleaned at the final completion of the process. 6. A process as claimed in claim 1, wherein the final treatment is dried and blown by air.