The preparation method of three cashmere color paste

Abstract

The invention discloses a preparing method for third-class linter unbleached pulp. The preparing method includes the following steps that third-class linter is compacted after impurities are removed; the compacted third-class linter is fed into a double-screw pulping machine for twisting and grinding devillicate, 2.5-3% of KOH and 0.5% of anthraquinone are added by the dry weight of the third-class linter, and the outlet temperature of the double-screw pulping machine is controlled at 120 DEG C-125 DEG C; pulp obtained after twisting and grinding devillicate is fed into a reaction bin to react for 65-70 min, and the third-class linter unbleached pulp is obtained through washing. The preparing method is simple in technology and low in power consumption, equipment investment is small, the pulping yield can reach 90-92%, the ratio of BODcr / CODcr of mid-stage effluent is large, which is particularly suitable for biological treatment, and the treated effluent is rich in potassium and is good farm irrigation water.

Description

technical field [0001] The invention relates to a preparation method of three-way velvet natural color paste. Background technique [0002] my country is rich in cotton, and the cotton linter resources are very rich. If all the embossed cottonseeds are peeled off, the short fleece can be equivalent to 15-20% of the total output of leather surface. According to the order of stripping, cotton linters can be divided into first-line cashmere, second-line cashmere, and three-line cashmere, and three-line cashmere (also known as Type III cotton linters, which is the cotton linters stripped by three-line cashmere stripping machines) accounts for About 30% of the total cashmere yield is a cellulose resource that cannot be ignored. Since the length of the three-way fleece fiber is generally below 3mm, domestic manufacturers mainly use the three-way fleece as viscose fiber at present. When the traditional alkaline method is used to make the original color paste of the three-layer f...

AI Technical Summary

Problems solved by technology

When using the traditional alkaline method to make the original color paste of three-way cashmere, the amount of alkali used is as high as about 20%, and the cooking yield is only about 22%, which is very serious for environmental pollution.