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Cationoid adsorbent for quarternary ammonium salt of agricultural waste, and preparation technique

An agricultural waste and cationic technology, which is applied in other chemical processes, chemical instruments and methods, etc., can solve the problems of low weight gain rate of tertiary amine salt cationic adsorbent and easy to be affected by the amount of dimethylamine, and achieve good results. Water treatment effect, the effect of simple production process

Inactive Publication Date: 2007-12-26
SHANDONG UNIV
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Problems solved by technology

[0006] The present invention aims at the technical deficiencies in the low weight gain rate of tertiary amine salt cationic adsorbents and being easily affected by the amount of dimethylamine, and provides a high weight gain rate, good product stability, good adsorption effect, wide application range, Agricultural waste quaternary ammonium salt cationic adsorbent with convenient regeneration, good storage stability and good adsorption effect and its preparation process

Method used

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  • Cationoid adsorbent for quarternary ammonium salt of agricultural waste, and preparation technique

Examples

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Effect test

Embodiment 1

[0030] Wheat straw and epichlorohydrin are stirred and reacted, and catalyst pyridine is added, then triethylamine solution is added, and the proportioning ratio between them is wheat straw: epichlorohydrin: pyridine: triethylamine solution=1g: 10mL: 8mL : 15 mL, the wheat straw quaternary ammonium salt cationic adsorbent was prepared. The product is represented by No.1. The specific preparation method is as follows:

[0031] (1) Take 2g of 500μm wheat straw in a 250mL three-necked flask, add 20mL of epichlorohydrin, stir and add an appropriate amount of N,N-dimethylformamide, and stir at 100°C for 60min.

[0032] (2) Take 15mL of pyridine in a 250mL three-necked flask and continue stirring for 60min, the temperature is controlled at 100°C.

[0033] (3) Add 30 mL of a triethylamine solution with a mass percent concentration of 99%, the reaction temperature is 100° C., and the stirring time is 3 hours.

[0034] (4) The product was washed with the same volume of NaOH (0.1mol ...

Embodiment 2

[0036] Wheat straw and epichlorohydrin are stirred and reacted, and catalyst pyridine is added, then triethylamine solution is added, and the proportioning ratio between them is wheat straw: epichlorohydrin: pyridine: triethylamine solution=1g: 10mL: 8mL : 10 mL, the wheat straw quaternary ammonium salt cationic adsorbent was prepared. The product is represented by No.2.

[0037] The specific preparation method is as in Example 1, except that: 20 mL of triethylamine is added, and the reaction temperature is 120° C. The obtained quaternary ammonium salt cationic adsorbent has a brown-black powder appearance and a Zeta potential of 46.9mv. The pH value of the aqueous solution is 4.47.

Embodiment 3

[0039] Wheat straw and epichlorohydrin are stirred and reacted, and catalyst pyridine is added, then triethylamine solution is added, and the proportioning ratio between them is wheat straw: epichlorohydrin: pyridine: triethylamine solution=1g: 10mL: 8mL : 20mL, the wheat straw quaternary ammonium salt cationic adsorbent was prepared. The product is represented by No.3.

[0040] The specific preparation method is as in Example 1, except that: 40 mL of triethylamine is added, and the reaction temperature is 90° C. The obtained quaternary ammonium salt cationic adsorbent has a black powder appearance and a Zeta potential of 45.7mv. The pH value of the aqueous solution is 4.27.

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Abstract

The invention publishes a preparation method for agricultural reject season amine salt positive ion absorbent. The absorbent is the powdered solid, the Zeta electric potential is between 24-48mv, water solution pH is in 2.5-7, it uses the agricultural reject straw stalk or the bagasse, epichlorohydrin and triethylamine as raw material. The advantages of the invention: simple craft, suitable economy, renewable and so on. The invention's absorbent has a characteristic of a high rate of liveweight growth, good stability, and good adsorption effect, broad applicable area and so on. And it is widely used to the water eutrophication.

Description

(1) Technical field [0001] The invention relates to a cationic adsorbent and a preparation process thereof, in particular to a quaternary ammonium salt cationic adsorbent and a preparation process thereof, belonging to the technical field of environment and chemistry. (2) Background technology [0002] According to the statistics of the United Nations Environment Program (UNEP), various crops grown in the world produce as many as 1.7 billion tons of straw every year, most of which are not effectively utilized. The utilization of crop straws can be roughly divided into three categories: one is industrial raw materials, which are mainly used for papermaking, accounting for about 2.3% of the total; It is directly burned or used as biomass energy, accounting for 31.5%. The remaining stalks are left unused or burned on site. At present, agricultural waste has been widely valued by various countries for its rich and cheap biological resources. There are many kinds of agricultura...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30
Inventor 高宝玉许醒岳钦艳王燕王宇岳文文
Owner SHANDONG UNIV
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