Short-flow environmentally-friendly production method for jute fibers

Abstract

The invention relates to a short-flow environmentally-friendly production method for jute fibers. The method is characterized in that: the principle of deep oxidation is adopted, and jute bast is subjected to identical bath degumming and bleaching. The method comprises the following steps of: 1) performing impurity removal and washing on the jute bast; 2) performing first identical bath degumming and bleaching by using 5 to 6 g / l of nano argil preparation, 6 to 7 g / l of caustic soda, 1 to 3 g / l of soda ash and 8 to 10 g / l of hydrogen peroxide; 3) performing second identical bath degumming and bleaching by using 4 to 5 g / l of nano argil preparation, 4 to 6 g / l of caustic soda, 1 to 3 g / l of soda ash and 8 to 12 g / l of hydrogen peroxide; 4) washing after degumming and bleaching; and 5) dehydrating, shaking, softening and drying the washed jute fibers. Compared with the prior art, the method has the advantages that: 1) the production process flow is shortened by adopting a deep oxidation method; 2) the produced jute fibers have good softness and high whiteness; and 3) the process wastewater is little and has low chromaticity, and the discharge of wastewater chemical oxygen demand (COD) is greatly reduced.

Description

technical field [0001] The invention relates to the field of hemp processing in the textile industry, in particular to a short-process and environment-friendly production method of jute fiber. Background technique [0002] Jute is low in price, high in yield, and is the second most cellulose fiber after cotton. Jute can be planted in saline-alkali soil without the use of pesticides, and the growth period is short, easy to plant and maintain. All over the world, the method of field retting has been used for degumming. The fibers after degumming are thick and hard, with high lignin content, which cannot be used for textile and clothing fabrics. [0003] Due to the high lignin content of jute, in order to remove lignin, Na 2 S, Na 2 SO 3 The scouring of sulfur-containing compounds will result in high COD of wastewater, which is not conducive to the subsequent biological treatment of wastewater. Using chlorine-containing sodium hypochlorite and sodium chlorite as chlorine bl...

AI Technical Summary

Problems solved by technology

All over the world, the method of field retting has been used for degumming. The fibers after degumming are thick and hard, with high lignin content, which cannot be used for textile and clothing fabrics.

[0003] Due to the high lignin content of jute, in order to remove lignin, Na 2 S, Na 2 SO 3 The scouring of sulfur-containing compounds will result in high COD of wastewater, which is not conducive to the subsequent biological treatment of wastewater. Using chlorine-containing sodium hypochlorite and sodium chlorite as chlorine bleaching to remove lignin will produce carcinogenic organic chlorine compounds. At the same time Sodium hypochlorite and sodium chlorite are toxic substances, which seriously corrode the equipment. After chlorine bleaching, neutralization and hydrogen peroxide rebleaching are required to remove residual chlorine and prevent yellowing. The water consumption is large, the process is long, and the environment is seriously polluted.