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Method for co-producing paper pulp and fuel ethanol by wild grass on forest land

A technology for woodland waste grass and fuel ethanol is applied in the field of comprehensive utilization of woodland waste grass resources. The effect of resources

Inactive Publication Date: 2009-03-11
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In China, grass raw materials are used to make pulp, and traditional methods often have difficult problems such as low calorific value of cooking black liquor, high viscosity, and silicon interference, and serious pollution problems
In addition, the grade of the obtained pulp is low, which cannot be compared with high-grade wood pulp, and the target product is only pulp, and the product form is single

Method used

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  • Method for co-producing paper pulp and fuel ethanol by wild grass on forest land
  • Method for co-producing paper pulp and fuel ethanol by wild grass on forest land
  • Method for co-producing paper pulp and fuel ethanol by wild grass on forest land

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Cut short 300g of woodland weeds of the whole plant and place them in a steam explosion device at 1.5MPa, maintain pressure for 5min for steam explosion treatment;

[0049] (2) adopt carding device to carry out carding and classification to the material after above-mentioned steam explosion treatment, the obtained high-quality fiber bundle tissue, miscellaneous cell and fine fiber tissue;

[0050] (3) Ethanol self-catalyzed pulping of high-quality fiber bundles in steam-exploded woodland weed grass

[0051] 1) Cooking: put the steam-exploded woodland weed grass fiber bundles into the cooking kettle, add 10L of liquid ratio to 1kg of material, add 55% (v / v) ethanol aqueous solution, rapidly raise the temperature to 160°C, and keep at this temperature for 120min:

[0052] 2) Washing: After the reaction is completed, pour condensed water to rapidly cool the reactor to about 70° C., take it out, and filter to obtain filtrate and slurry. Replace and wash the pulp with 5...

Embodiment 2

[0059] (1) Cut short 300g of woodland weeds of the whole plant and place them in a steam explosion device at 1.5MPa, maintain pressure for 4min for steam explosion treatment;

[0060] (2) adopt carding device to carry out carding and classification to the material after above-mentioned steam explosion treatment, the obtained high-quality fiber bundle tissue, miscellaneous cell and fine fiber tissue;

[0061] (3) Ethanol self-catalyzed pulping of high-quality fiber bundles in steam-exploded woodland weed grass

[0062] 1) Cooking: put the steam-exploded woodland weed grass fiber bundles into a cooking kettle, add 55% (v / v) ethanol aqueous solution according to the ratio of 12L of liquid to 1kg of material, rapidly raise the temperature to 140°C, and keep at this temperature for 90min;

[0063] 2) Washing: After the reaction is completed, pour condensed water to rapidly cool the reactor to about 70° C., take it out, and filter to obtain filtrate and slurry. Replace and wash the...

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Abstract

The invention provides a method for co-producing paper pulp and fuel ethanol by waste grass in woodland. In the method, each link is clean and environment friendly ; the steam explosion pretreatment and a mechanical carding tissue are coupled in classification and are separated to obtain a high-quality fibre tissue, a miscellaneous cell tissue and a fine fibre tissue; a high-quality long fibre bundle tissue adopts the steam explosion pretreatment and an ethanol self-catalysis method which are coupled with each other to prepare high-grade paper pulp cleanly; a short fibre consisting of a thin-wall cell and the like ferments to produce the fuel ethanol; at the same time, xylo-oligosaccharides, lignin and nano-silica as byproducts are reclaimed and prepared, thereby realizing the fractionated separation, cleaning and high-value utilization of the waste grass resources in the woodland.

Description

technical field [0001] The invention belongs to the comprehensive utilization of woodland weed resources, and in particular relates to a method for cleanly grading and co-producing pulp and fuel ethanol by using woodland weeds as raw materials. Background technique [0002] Weed grasses in woodlands include Bawanggrass, Asparagus and Thatch, etc. Most of them are perennial, erect and clumped Gramineae plants, which have the characteristics of fast growth, strong tillering ability and high yield. Woodland weeds are widely distributed in hilly and mountainous areas. Due to long-term unmanned development and utilization, most of them are in a state of self-destruction. However, woodland weeds are rich in fibrous tissue, with a fiber content of more than 65%, which can replace wood as raw materials for papermaking. Saving wood can also increase farmers' economic income, and it is also an excellent vegetation for water conservation and greening of the country. Therefore, the deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/12D21B1/36D21C3/00D21C7/00D21C9/02D21C9/16C12P7/10
CPCY02E50/16Y02E50/10
Inventor 陈洪章付小果张作仿
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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