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Pretreatment method for ultra-high pressure blasting wood fiber material

A lignocellulosic material and ultra-high pressure technology, which is applied in fiber raw material processing, fiber raw material, raw material separation, etc., can solve the problems of long production cycle, high equipment requirements, and high production cost.

Inactive Publication Date: 2009-06-24
GUANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these methods are not completely ideal yet, and the main shortcomings are: 1. The process is complicated or the requirements for equipment are very high; 2. The production cycle is too long or the production cost is too high; 3. Some processes (such as steam explosion method and dilute acid treatment method) ) also produces substances harmful to microbial fermentation
However, this technology is theoretically only suitable for the processing of liquid or suspended fine particle materials, and it has not been reported so far for the pretreatment of lignocellulosic materials in solid state

Method used

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  • Pretreatment method for ultra-high pressure blasting wood fiber material
  • Pretreatment method for ultra-high pressure blasting wood fiber material
  • Pretreatment method for ultra-high pressure blasting wood fiber material

Examples

Experimental program
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Effect test

Embodiment 1

[0050] 1. Drying and crushing of materials: The bagasse is taken back from the sugar factory and air-dried naturally or dried at 70°C until the moisture content is about 7%, crushed with a suspension type crusher (WKF type), and passed through a 40-mesh sieve.

[0051] 2. Heating and wetting of materials: prepare 0.2% sodium hydroxide solution, add bagasse to make a 5% suspension solution, stir evenly, and heat at 100°C for 10 minutes to make bagasse wet and settle.

[0052] 3. Preparation of material suspension: add xanthan gum to the bagasse suspension to a concentration of 0.2%, stir and dissolve evenly, so that the bagasse is in a suspended state.

[0053]4. Ultra-high pressure blasting: use a high-pressure homogenizer (GYB40-10S type, maximum working pressure 100MPa) produced by Shanghai Donghua High-pressure Homogenizer Factory, and install an agitator in the homogenizer feed hopper. When processing, pour the material into the hopper, start the agitator immediately, and ...

Embodiment 2

[0062] 1. Material drying and crushing: cane pith is the central pith of sugarcane straw. In sugar mills, it usually refers to the smaller parts left after bagasse is sold to paper mills. This part of the material is not suitable for papermaking due to its short fibers. The cane pith bought back from the sugar factory is naturally air-dried or dried at 70°C with the example 1, until the moisture content is about 7%, then pulverized with the suspension type pulverizer with the example 1, and crossed a 40-mesh sieve.

[0063] 2. Heating and wetting of materials: first prepare 0.1% sodium hydroxide solution, add sugarcane pith to make a 3% (g / v) suspension, and heat at 100°C for 10 minutes.

[0064] 3. Preparation of material suspension: add xanthan gum to the cane pith suspension to a concentration of 0.1%, stir and dissolve evenly, so that the cane pith is in a suspended state.

[0065] 4. Ultra-high pressure blasting: the sugarcane pith is subjected to ultra-high pressure bl...

Embodiment 3

[0070] 1, material drying, crushing: bagasse pretreatment is carried out by the method for embodiment 1, obtains the dry bagasse powder crossing 40 mesh sieves.

[0071] 2. Heating and moistening of materials: Prepare 0.5% sodium hydroxide solution, add bagasse to make a 3% (g / v) suspension, heat in a sterilizing pot at 125°C for 120 minutes, and then reduce the pressure to normal pressure (Temperature below 100°C) Take it out. Bagasse is in a state of easy suspension, and the solution is brown-black.

[0072] 3. Ultra-high pressure blasting: The material suspension is subjected to ultra-high pressure blasting with a high-pressure homogenizer, the method is the same as in Example 1, and the blasting pressure is 100 MPa. The processed material is viscous paste, dark brown.

[0073] 4. Material handling after blasting

[0074] Filter: carry out by the method for embodiment 1. The solid part (filter residue) obtained by filtration is solid, with a water content of 80% to 85%,...

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Abstract

The invention discloses a pretreatment method for lignocellulosic materials. The method is as follows: a high-pressure homogenizer which is conventional but is currently only used for processing liquid state materials is taken as the treatment equipment, a stirring device is installed at the feed funnel of the homogenizer, the materials are exploded under ultrahigh pressure by means of transient pressure and pressure elimination in the homogenizing process. The method comprises the steps as follows: the pre-processes like drying, smashing and sieving, etc. of the lignocellulosic materials, the heating and moistening of the materials, the preparation of the suspending liquid, the ultrahigh pressure explosion and the material process after explosion, etc. Compared with various currently disclosed pretreatment methods for lignocellulosic materials, the method not only has the advantages of low requirement for equipment, mild process condition, no harmful substances which inhibit microorganism fermentation and low energy consumption, etc. but also can process the ultramicrostructure which totally changes the lignocellulosic materials and creatively realize the full hydrolyzation of the lignocellulosic materials by making use of the cellulolytic enzyme system of low beta-glucosidase activity.

Description

technical field [0001] The invention relates to a lignocellulosic material pretreatment technology required for the development and utilization of non-grain lignocellulosic biomass resources, in particular to a lignocellulosic material pretreatment technology for ultra-high pressure blasting, and belongs to the field of lignocellulosic material biochemical industry. Background technique [0002] The material resources formed by plants through photosynthesis are collectively referred to as biomass resources, which are composed of food biomass resources and non-food biomass resources. Non-food biomass is mainly composed of cellulose, hemicellulose and lignin, and may also contain a small amount of pectin, chitin, wax, silicate and other components. Different types of materials are different, so Also known as lignocellulosic material. The cellulose component in the lignocellulosic material usually accounts for 40-50%, the hemicellulose component accounts for 25-30%, and the li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00D21B1/06D21B1/12D21C3/02C01G1/00C08L5/14
Inventor 黄日波陈东
Owner GUANGXI ACAD OF SCI
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