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Filter paper having boric acid adsorption and desorption functions and preparation method thereof

A technology of adsorption, desorption and boric acid, applied in the field of functional paper, can solve the problems of narrow application range of functional paper, and achieve the effects of good popularization and application value, simple preparation method, simple process and easy operation.

Active Publication Date: 2018-01-12
广西宇达环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current application of paper is mainly concentrated in household paper, packaging paper, office paper, newsprint and other fields, and the application range of functional paper is relatively narrow

Method used

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  • Filter paper having boric acid adsorption and desorption functions and preparation method thereof
  • Filter paper having boric acid adsorption and desorption functions and preparation method thereof
  • Filter paper having boric acid adsorption and desorption functions and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Tear the larch fiber pulp board into small samples with a diameter of about 4 to 5 cm, put a certain amount of water in the beater, and prepare a slurry with a pulp concentration of 2%, and stir in the beater to obtain a beating degree of The 30% cellulose pulp is squeezed and filtered to remove most of the moisture in the pulp, and dedried in a dehydrator to obtain a pulp for papermaking with an absolute dryness of 25%.

[0035] Take 2 parts of slurry with an absolute dryness of 25%, put them in 2000mL of water, and use a decomposer to decompose for 5 minutes, then add 0.5 parts of tannic acid aqueous solution with a mass concentration of 10% to the slurry, and 0.01 parts with a mass concentration of 1‰ The cationic polyacrylamide was stirred at a stirring rate of 200r / min for 10 minutes, the slurry was placed in a paper machine to make paper, and the paper was dried in a dryer at 60°C to obtain the final functional filter paper.

[0036] Under other conditions being t...

Embodiment 2

[0038] Tear the poplar fiber pulp board into small samples with a diameter of about 4 to 5 cm, put it in a beater and then add a certain amount of water to prepare a slurry with a 2% pulp concentration, stir in the beater to obtain a beating degree of 20 % of the cellulose pulp, under the action of extrusion filtration, most of the water in the pulp is removed, and dedried in a dehydrator to obtain a pulp for papermaking with an absolute dryness of 26%.

[0039] Take 2 parts of slurry with an absolute dryness of 26%, put them in 2000mL of water, and use a deconcentrator to decompose for 5 minutes, then add 5 parts of tannic acid aqueous solution with a mass concentration of 11% to the slurry, and 0.5 parts with a mass concentration of 1.5‰ The cationic starch was stirred at a stirring rate of 200r / min for 10min, the slurry was placed in a paper machine to make paper, and the paper was dried in a dryer at 70°C to obtain the final functional filter paper.

[0040] Under other co...

Embodiment 3

[0042] Tear the bagasse fiber pulp board into small samples with a diameter of about 4 to 5 cm, put it in a beater and add a certain amount of water to prepare a slurry with a 2% pulp concentration, stir in the beater, and obtain a beating degree of 40 % of the cellulose pulp, under the action of extrusion filtration, remove most of the water in the pulp, and dedry in a dehydrator to obtain pulp for papermaking with an absolute dryness of 27%.

[0043] Take 5 parts of slurry with an absolute dryness of 27%, put it in 2000mL of water, and use a deflagger to decompose it for 5 minutes, then add 6 parts of tannic acid aqueous solution with a mass concentration of 12% to the slurry, and 0.2 parts with a mass concentration of 2‰ After stirring for 10 minutes at a stirring rate of 200r / min, the slurry was placed in a paper machine to make paper, and the paper was dried in a dryer at 80°C to obtain the final functional filter paper.

[0044] Under other conditions being the same, no ...

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Abstract

The invention discloses filter paper having boric acid adsorption and desorption functions and a preparation method thereof and belongs to the technical field of functional paper. The filter paper isprepared from, by weight, 2-10 parts of fiber pulp, 0.5-10 parts of tannin solution and 0.01-0.5 part of cation flocculant. The filter paper can selectively adsorb boric acid, can desorb and recycle adsorbed boric acid and has high popularization and application value.

Description

technical field [0001] The invention relates to the technical field of functional paper, and specifically provides a filter paper with the function of absorbing and desorbing boric acid and a preparation method thereof. Background technique [0002] Boric acid is an essential trace element for plant growth, however, when it is excessive, it will be toxic and have a serious impact on plant growth. Generally, the safe concentration of boric acid in irrigation water is below 0.3mg / L, the safe concentration of boric acid for semi-tolerant plants is between 1-2mg / L, and the safe concentration of boric acid for tolerant plants is between 2-4mg / L. Therefore, it is necessary to adopt suitable methods to reduce the excess boric acid in water. [0003] At present, the methods for removing boric acid in water can be classified into several categories: reverse osmosis, ion exchange, concentration, solvent extraction, membrane separation, electrodialysis and adsorption, etc. In contras...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/08D21H21/06
Inventor 夏南南孔凡功王守娟孙浩东吴芹高超房路路
Owner 广西宇达环境科技有限公司
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