High-gum-content raw hemp fiber degumming method

Abstract

The invention discloses a high-gum-content raw hemp fiber degumming method. The method comprises a mechanical decortication and chemical immersion pre-degumming step, a steam explosion degumming step, a lignin oxidation degumming step and an ethanol boiling step. In the invention, based on the prior art, an independent lignin catalytic oxidation step is adopted, and chemical formula and technological conditions of a lignin catalytic oxidizer are improved to control the degradation degree of lignin, so that the lignin is partially degraded into non-water-soluble polyphenol substances, thus skillfully solving the problem that the lignin is sufficiently degraded into water-soluble monophenol and enters production wastewater. The polyphenol substances obtained after the degradation of the lignin are extracted through the subsequent ethanol boiling step, i.e. the polyphenol substances enter an ethanol solution and are subjected to simple distillation and purification to produce useful industrial byproducts. According to the invention, the method has the characteristics of favorable degumming effect, mild process, small fiber damage and the like; and the obtained fiber has high strength, favorable whiteness and high comprehensive quality.

Description

technical field

[0001] The invention relates to a processing method of raw hemp fiber, in particular to a degumming method of raw hemp fiber with high colloid content, and belongs to the technical field of textile industry. Background technique

[0002] Hemp plants are an important raw material source for textile fibers. Hemp plant raw materials have gradually become the main source of fiber resources due to their renewability and easy recovery of cellulose. The most important thing in the preparation process of hemp fiber is the fiber separation technology, that is, the degumming technology.

[0003] Except for ramie, other hemp plants generally have high content of colloidal components and lignin components. It is precisely because of the high content of lignin components that the difficulty of degumming such raw hemp fibers is exacerbated.

[0004] In the prior art, a combined method of chemical degumming and steam flash degumming is commonly used to degumming raw hemp ...

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