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A production process of glue-free and formaldehyde-free fiberboard with co-production of fulvic acid from straw

A production process, the technology of fulvic acid, is applied in fiber raw material processing, wood processing appliances, and other household appliances, etc. It can solve the problems not involved in the sewage treatment of the production of glue-free and formaldehyde-free fiberboard, and achieve economic value and product added value High, improve industrial competitiveness, eliminate pollution effect

Active Publication Date: 2021-11-16
白博 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventor found that the purpose is to cook and soften, not to purify the fiber and obtain fulvic acid; in addition, it does not involve the production of glue-free and formaldehyde-free fiberboard and the problem of sewage treatment

Method used

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  • A production process of glue-free and formaldehyde-free fiberboard with co-production of fulvic acid from straw
  • A production process of glue-free and formaldehyde-free fiberboard with co-production of fulvic acid from straw
  • A production process of glue-free and formaldehyde-free fiberboard with co-production of fulvic acid from straw

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Use wheat straw as raw material, crush it to 2-5cm for later use, follow the steps below:

[0080] The first step, washing materials;

[0081] In the second step, preliminary purification, activation and saccharification are carried out by cooking. Dosing and dosing according to the following ratio: 2 tons of absolute dry raw materials, 200kg of ammonium sulfite, add water according to the liquid ratio of 1:5, put into steaming balls, heat to 120°C to release steam, heat up to 160°C, keep warm for 60min, and discharge. The initial purification, activation and saccharification are completed by cooking, which not only degrades non-wood fiber components such as pectin wax into low sugar and dissolves them in the cooking liquid, partially degrades hemicellulose, saccharifies and dissolves them in the cooking liquid; at the same time, makes part of the lignin sulfonate It can be activated by chemical hydrolysis, splitting lignin as a whole and separating it from cellulose; ...

Embodiment 2

[0100] Use cotton stalks as raw materials, crush them to 2-5cm for later use, and proceed as follows:

[0101] The first step, washing materials;

[0102] In the second step, preliminary purification, activation and saccharification are carried out by cooking. Dosing and dosing according to the following proportions: 1kg of absolute dry raw material, 200g of ammonium sulfite, add water according to the liquid ratio of 1:5, put it into a 15L electric heating rotary steamer, heat to 120°C to release steam, heat up to 160°C, keep it warm for 60min, and leave material. The initial purification and activation are completed by cooking, which not only degrades non-wood fiber components such as pectin wax into low sugar and dissolves them in the cooking liquid, partially degrades hemicellulose, saccharifies and dissolves them in the cooking liquid; at the same time, makes part of the lignin sulfonated and hydrolyzed Thus, it can be activated, and the whole lignin can be split and se...

Embodiment 3

[0118] Cotton stalks are used as raw materials.

[0119] Step 1~step 7 are the same as embodiment 2;

[0120] Step 8, board making and testing indicators.

[0121] Experimental conditions: SYD1 test hot press——produced by Shanghai Liangjun Hydraulic Equipment Co., Ltd. The test adopts the flat pressing method. Take 1 kg of cotton stalk purified fiber pulp with absolute dry weight, 400 g of fulvic acid black liquor, and 20 g of paraffin. Quantity 15%, stir evenly in a glue blender, set aside. Make a density board with a size of 300mm*300mm and a thickness of 3mm. The hot pressing pressure is 4 MPa, the hot pressing temperature is 200°C, and the hot pressing time is 10 minutes.

[0122] Detection Indicator:

[0123]

[0124] The main indicators meet or exceed the ordinary type standard of GB / T 31765-2015 "High Density Fiberboard".

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Abstract

The invention relates to a production process of glue-free and formaldehyde-free fiberboards for the co-production of fulvic acid from straws. Using non-wood fibers as raw materials, the purification, activation, saccharification and separation of all elements are carried out through cooking and decomposing to obtain initially activated lignin and purification. Activated fibers and hemicellulose and non-wood fiber monosaccharides, and fulvic acid; deep activation of activated lignin. Fully activated lignin and low-molecular monosaccharides are used as curing agents and binders to produce glue-free and formaldehyde-free fiberboards. Through the full activation of lignin, it not only realizes the comprehensive utilization of straw fiber resources, but also effectively meets the special requirements of high-quality fiber raw materials and high-activity lignin for glue-free and formaldehyde-free fiberboard; Fulvic acid fundamentally eliminates the pollution problem of pulping and board making; the distilled water obtained by evaporating and concentrating cooking dilute black liquor is recycled; the added value of fulvic acid obtained by co-production is high, turning waste into treasure and improving straw The performance, quality and market competitiveness of glue-free and formaldehyde-free fiberboard.

Description

technical field [0001] The invention belongs to the fields of comprehensive utilization of straw resources and clean production of circular economy industries, and in particular relates to a glue-free and formaldehyde-free fiberboard process for co-producing fulvic acid from straw. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The fiberboard market has a large capacity and is widely used. However, fiberboard consumes a lot of wood, and formaldehyde seriously affects the environment and damages people's health; at the same time, due to technical reasons, the quality and performance of non-wood fibers lead to low product grades and poor economic benefits, making the rich ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27N3/12B27N3/18D21H11/12D21C7/00D21D1/20D21C9/02D21C11/10
CPCB27N3/12B27N3/18D21H11/12D21C7/00D21D1/20D21C9/02D21C11/10D21C11/0007
Inventor 白博白嘉妮刘玉芳史晓菲
Owner 白博
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