Preparation method of nanoscale solidago canadensis L. microcrystalline cellulose

A microcrystalline cellulose, nano-level technology, applied in fiber raw material processing, textiles and papermaking, etc., can solve the problems of lack of resources, high cost, single product, etc., and achieve the effect of solving ecological and environmental problems

Inactive Publication Date: 2012-07-18
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These production processes have great disadvantages: cotton and wood are used as raw materials, resulting in a lack of resources; at the same time, when preparing microcrystalline cellulose, the product is single and the cost is high. In order to continuously improve the performance of microcrystalline cellulose, reduce production costs, and cater to environmental friendliness People are constantly exploring the preparation of microcrystalline cellulose through cheaper raw materials and more environmentally friendly methods

Method used

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  • Preparation method of nanoscale solidago canadensis L. microcrystalline cellulose
  • Preparation method of nanoscale solidago canadensis L. microcrystalline cellulose
  • Preparation method of nanoscale solidago canadensis L. microcrystalline cellulose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Weigh 5g of Solidago canadensis stalks in a 250ml Erlenmeyer flask, add 60mL of 88% formic acid and 1.5mL of 37% hydrochloric acid, place in a magnetic stirring heater, and continuously stir through a magnetic rotor at a speed of 400r / min, react at 85°C for 15min, 30min, 1.5h, 2h, 2.5h, 3h, 4h, 6h, and react at 75, 80, 85, 90, 95°C for 2.5h;

[0027] (2) The reaction slurry is taken out for suction filtration, and the obtained solid is washed with about 40 mL of 88% formic acid and then suction filtered, and the collected filtrate is subjected to vacuum distillation to recover a mixed solution of formic acid and hydrochloric acid (reusable);

[0028] (3) adding water to the solution after vacuum distillation to dissolve the hydrolyzed sugar of hemicellulose, water-insoluble lignin is recovered by a centrifuge, quantified after drying, and the remaining solid obtained by suction filtration is washed to neutral with distilled water, and quantified after drying;

[00...

Embodiment 2

[0035] (1) After crushing 6g of solidago canadensis stalks, put them in a reaction vessel, add 60mL of formic acid with a mass fraction of 88% and 1.5mL of hydrochloric acid with a mass fraction of 36-38%, stir, and react at 85°C for 2.5 h; then suction filtered to obtain a solid;

[0036] (2) Add a sodium hydroxide solution with a mass concentration of 17.5% to the above solid, so that the pH of the suspension is 11, then add a hydrogen peroxide solution, and react at 80° C. for 1 hour; The material was suction filtered, washed with distilled water until neutral, and the obtained solid was dried to obtain α-cellulose;

[0037] (3) Take 5 g of the above-mentioned α-cellulose in a reaction vessel, add 100 mL of hydrochloric acid with a mass concentration of 6%, stir and react at 100° C. for 60 min, filter with suction after cooling, and finally wash, dry and grind the obtained solid to obtain Microcrystalline Cellulose Products.

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Abstract

The invention relates to a preparation method of nanoscale solidago canadensis L. microcrystalline cellulose, which includes: (1) smashing stalks of solidago canadensis L., being placed in a reaction vessel, adding formic acid and hydrochloric acid, stirring, and reacting at the temperature of 85 DEG C; and then performing suction filtration to obtain solid; (2) adding appropriate amount of sodium hydroxide solution in the solid, then adding hydrogen dioxide solution, performing suction filtration on obtained slurry after reaction is finished, washing the slurry by using distilled water to neutral, and drying obtained solid to obtain alpha-cellulose; and (3) putting the alpha-cellulose in the reaction vessel, adding sulfuric acid, stirring and reacting at the temperature of 100 DEG C, performing suction filtration after cooling, and finally washing, drying and grinding obtained solid to obtain the nanoscale solidago canadensis L. microcrystalline cellulose. The nanoscale solidago canadensis L. microcrystalline cellulose is simple in preparation method, high in resource recycling rate and small in pollution, and the preparation method is an effective measure to treat the solidago canadensis L. and can solve actual ecological environment problems.

Description

technical field [0001] The invention belongs to the field of preparation of microcrystalline cellulose, in particular to a preparation method of nano-scale canadensis microcrystalline cellulose. Background technique [0002] There are many types of microcrystalline cellulose produced, with different properties, and the process conditions and equipment selection are also different. However, its main manufacturing principle and basic process route are still the same, that is, microcrystalline cellulose is produced by chemical processes such as acid hydrolysis, washing, drying, and crushing. [0003] At present, the methods of industrial production mainly include chemical method and mechanical method. In addition, microbial fermentation method, that is, enzymatic hydrolysis method, is in the process of research and development. These production processes have great disadvantages: cotton and wood are used as raw materials, resulting in a lack of resources; at the same time, whe...

Claims

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Application Information

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IPC IPC(8): C08B15/08D21C5/00
Inventor 杨再福薛金莲
Owner DONGHUA UNIV
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