SU50782A1 - The method of using the delint to obtain a copper-ammonium spinning solution - Google Patents

Description

Cotton seeds, after removing textile fibers from them, go to further processing in order to remove shorter (than textile) fibers (the so-called “spinner”).

The result is a so-called linter fiber material used in the manufacture of smokeless powder, film, etc.

After the linter has been removed, the hair remains on the seeds, with a wolf-window length of 2 –b j..ii.

The seeds after the linter are fed to the creamery, where the seed is removed, the removal of the husk in order to release the core. Idush it to extract oil.

The waste produced during the breaking of the seeds of the seed is used for heating the steam boilers of the oil plants, but for the most part goes to the landfill.

The husks contain 22-25% of the fibers (the so-called delint) and 73 husk husks of seeds.

The technique of separating the delint from the husk (sometimes whole seeds) is mechanically known, but I meet it in practical implementation

: great difficulty.

Chemical analysis shows that

The fibrous part I of the husk (delint) and the shell itself are very different in composition from each other.

I friend: the fibrous part consists mainly of cellulose with a small admixture of lignin, pentazans, fat, wax and mineral substances, the shell, mainly from lignin, pentazans and other substances.

Based on such a difference in compositions, it is possible to use the fibrous part of the husk and the preparation of spinning solutions (for the manufacture of artificial fibers) using a simplified method without first separating the fibers from the shell.

To obtain a spinning dope (for example, for the manufacture of copper-ammonium or acetate artificial fiber), the crack is available on offer. the method should be boiled in alkalis, washed,

I bleach and, after application, treat with chemical reagents that dissolve the purified fiber. With this treatment (dissolution), the shell will remain little.

chemically altered, and only a tiny amount of shell material will pass into the solution of the fibrous part.

After the fiber is dissolved, the mixture containing the fiber solution and the unchanged husk is pressed; the fiber solution is separated from the husk and after cleaning it is fed to the filter presses for spinning. It is possible to regenerate copper from residues from pressing by usual methods.

The invention. The method of using the delint to obtain a spinning ammonia-copper solution using conventional cleaning by alkaline decoction and bleaching, characterized in that the husks prepared in this way together with the fiber are treated with Schweitzer reagent in order to dissolve the delint and the resulting ammonium-copper cellulose solution is separated from husk filtering.