Preparation method of polypropylene fiber for absorbing mercury ions in waste water

A polypropylene fiber and mercury ion technology, applied in the direction of adsorption of water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of lack of organic mercury ion adsorption materials, non-recyclable utilization, low economic benefits, etc. Achieve the effect of low cost, convenient source and good mercury adsorption effect

Inactive Publication Date: 2009-09-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually chemists use organic compounds that can chemically react with mercury ions to detect mercury ions [7-8] , although this method is sensitive and quantitative, but this process is irreversible, cannot be recycled, and the economic benefit is low, so it is not suitable for the treatment

Method used

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  • Preparation method of polypropylene fiber for absorbing mercury ions in waste water
  • Preparation method of polypropylene fiber for absorbing mercury ions in waste water
  • Preparation method of polypropylene fiber for absorbing mercury ions in waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] (1) Synthesis of organic mercury ion adsorption compound 1 (n 1 =0,n 2 =1)

[0063] Weigh 1.5 grams (8.4 millimoles) of 4-diethylaminobenzaldehyde and dissolve it in 50 milliliters of absolute ethanol, heat it in a water bath to 80 degrees Celsius, slowly add 0.17 grams (4.2 millimoles) of 85t% hydrazine hydrate dropwise, and condense Reflux for 1.5h, a yellow precipitate was obtained. After recrystallization, it was filtered and dried to obtain the target compound 1 as a yellow solid with a mass of 1.01 g (yield 57.4%).

[0064] Mass spectrum (EI): m / z350

[0065] Melting point: 193 degrees Celsius

[0066] H NMR 1 H-NMR (300MHz, CDCl 3 , 25 degrees Celsius, TMS): δ=8.54 (s, 2H), 7.67 (d, 4H), 6.67 (d, 4H), 3.42 (m, 8H), 1.19 (m, 12H). Elemental Analysis C 22 h 30 N 4 (35.025) Calculated: C, 75.43; H, 8.57; N, 16.00. Measured values: C, 75.73; H, 8.77; N, 15.54.

[0067] (2) Synthesis of organic mercury ion adsorption compound 2 (n 1 = 1, n 2 =1, R=-Ph) ...

Embodiment 2

[0073] Preparation of Luminescent Polypropylene Fiber

[0074] Raw materials: 200 grams of polypropylene, 2 grams of organic mercury ion adsorption compound

[0075] Preparation method: After mixing the above raw materials evenly, melt blending with a multifilament 400 melt spinning machine, extrusion and spinning. The spinning speed is 400 meters per minute, the spinning temperature is 270 degrees Celsius, and the post-drawing ratio is 2.8 times.

[0076] Results: The specifications of the luminescent fiber drawing yarn are 67 dtex per 18 holes, the strength is 3.89 centinewtons per dtex, enough fibers can make the content of mercury ions in water less than 10 -6 moles per liter.

Embodiment 3

[0078] Preparation of Luminescent Polypropylene Fiber

[0079] Raw materials: 200 grams of polypropylene, 4 grams of organic mercury ion adsorption compound

[0080] Preparation method: After mixing the above raw materials evenly, melt blending with a multifilament 400 melt spinning machine, extrusion and spinning. The spinning speed is 600 meters per minute, the spinning temperature is 290 degrees Celsius, and the post-drawing ratio is 2.8 times.

[0081] Results: The specification of the luminescent fiber drawing yarn is 62 dtex per 18 holes, the strength is 3.51 centinewtons per dtex, enough fibers can make the content of mercury ions in water less than 10 -6 moles per liter.

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Abstract

The invention relates to a preparation method of polypropylene fiber for absorbing mercury ions in waste water. The preparation method comprises the following steps of: (1) weighing and dissolving 1 to 3g of para-diethylamino benzaldehyde and derivatives thereof into absolute alcohol, heating in water bath, slowly dipping alcohol solution of diamine compounds, condensing and refluxing, standing, obtaining yellow precipitates, filtering and precipitating, recrystallizing with alcohol, then filtering, drying and obtaining organic compound for absorbing mercury ions; and (2) evenly mixing 150 to 300g of polypropylene and 2 to 5g of organic compound for absorbing mercury ions, carrying out melting and blending by a multifilament 400 melt spinning machine, extruding, spinning and obtaining the polypropylene fiber. The invention has simple preparation and high yield; the obtained organic compound has good effect of absorbing mercury ions, can generate color variation or fluorescence variation when reacting with mercury and has no toxicity and no radiation; the polypropylene fiber has uniform dispersion in polypropylene high polymer and good spinnability and can achieve good mercury absorbing effect when addition is less than 2 percent.

Description

technical field [0001] The invention belongs to the field of polypropylene fiber preparation, in particular to a preparation method of polypropylene fiber which absorbs mercury ions in waste water. Background technique [0002] Mercury is one of the six major poisons recognized internationally, which is highly toxic and bioaccumulative. Organic mercury is also a nerve agent, which can cause prenatal brain damage, movement disorders and other diseases in infants, especially Minamata disease (a serious neurological disease caused by mercury poisoning) [1-3] . With the increase of mercury consumption in industrial and agricultural production, mercury pollution is becoming more and more serious, causing great harm to human health and the environment [4-6] . At present, the methods for treating mercury-containing wastewater include electrolysis, coagulation precipitation, sulfuration, reduction, and activated carbon adsorption. Although these treatment methods have certain eff...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30D01F6/48C02F1/28C02F1/62
Inventor 付艳艳李光苗自婷江建明
Owner DONGHUA UNIV
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