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Micro-powder cellulose preparation method

A technology of micronized cellulose and cellulose, which is applied in fiber raw material processing, textiles and papermaking, etc., can solve problems such as environmental pollution and resource waste, and achieve the effect of saving water resources and reducing pollution

Active Publication Date: 2013-05-08
SHANGHAI TONNOR MATERIAL SCI
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  • Summary
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Problems solved by technology

[0005] The invention provides a method for preparing micropowder cellulose, which uses cotton "cotton dust", that is, cotton fine fibers, as raw material, and adopts high-shear oxidation depolymerization treatment, which solves the problems of waste of resources, environmental pollution and large-scale industrial production

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Such as figure 1 , is a process flow diagram of the present invention, specifically:

[0027] (1) Cotton dust cleaning and impurity removal: The recycled cotton dust raw material 1 is blown into the sand removal box 3 through the fan 2, and non-fibrous impurities such as sand with a larger particle size are removed in the sand removal box 3 . The cotton dust raw material after desanding is passed into the cyclone separator 4, and the non-fibrous impurities such as cotton leaves are separated, and enters the powder residue chamber 5, and the remaining cotton dust raw material is fine cotton fibers with a polymerization degree below 500, and the impurities removed therein contain Cotton fibers with a higher degree of polymerization (more than 800) of about 5% of the total amount of cotton dust can be recycled as raw materials for pulp cotton linters.

[0028] (2...

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Abstract

The invention discloses a micro-powder cellulose preparation method, which is characterized in that cotton dust is adopted as a raw material, purity-increase impurity-removing and decoloration degradation are performed, and one of an improved twin-screw slurry extruder, a ball mill, a rod mill and a vibration mill is adopted to carry out a high shear oxidation depolymerization treatment to obtain the micro-powder cellulose, wherein cotton dust can not be used by textile industry. According to the present invention, the characteristic of low polymerization degree of the cotton dust fine fiber is utilized, and the resource is complete, such that large-scale industrial production can be performed, and product stability and purity are high.

Description

technical field [0001] The invention relates to a method for preparing micropowder cellulose. Background technique [0002] Micropowder (microcrystalline) cellulose is a new form of cellulose, which is a highly dispersible and adsorbable micron-sized powder product produced by hydrolysis of cellulose materials to the limit degree of polymerization. In recent years, the development and research of micropowdered cellulose has been paid much attention, and has been widely used in leather, welding rods, food, medicine, building materials and daily chemicals and other fields. However, the current domestic production of micropowder cellulose is mainly produced by hydrolyzing natural cellulose (refined cotton or high-quality wood pulp) with dilute acid to the limit degree of polymerization, and then undergoing appropriate mechanical treatment. This method consumes a large amount of high-quality cotton pulp and wood pulp resources, and produces a large amount of waste water in the ...

Claims

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Application Information

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IPC IPC(8): C08B15/08D21C5/00
Inventor 张楠
Owner SHANGHAI TONNOR MATERIAL SCI
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