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Preparation of dimethyl diallyl ammonium chloride modified towel gourd vegetable sponge adsorbent

A technology of dimethyl diallyl ammonium chloride and loofah, which is applied in the field of water treatment to achieve the effect of low density, high removal rate and fast speed

Inactive Publication Date: 2015-01-21
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Neha Gupta et al. have studied methylene blue and malachite green in the adsorption water of potato stalks, and its maximum adsorption capacity is: 52.6mg / g, (Neha Gupta, Application of potato (Solanum tuberosum) plant wastes for the removal of methylene blue and malachite green dye from aqueous solution. Arabian Journal of Chemistry, (2011),); Runping Han et al. studied the adsorption of methylene blue in water by fallen leaves of sycamore trees, and its maximum adsorption capacity was: 89.7mg / g, (Runping Han, Biosorption of methylene blue from aqueous solution by fallen phoenix tree's leaves. Journal of Hazardous Materials, 141 (2007) 156–162); Li Shan et al. studied the adsorption of methylene blue in water by epichlorohydrin modified peanut shells, and its maximum value for methylene blue The adsorption capacity is: 25 mg / g, (Li Shan et al., Research on the Adsorption of Methylene Blue in Water by Epichlorohydrin Modified Peanut Shells, Dyestuffs and Dyeing, 2008, 45 (2): 49~51); but natural fibers are used as The application of adsorbent in oil adsorption has not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Loofah pretreatment: Loofah comes from the fruit of loofah, which is obtained by peeling and removing the core. Cut the loofah into small pieces, wash with water, dry and crush, and sieve through a 10-mesh sieve to obtain pretreated loofah network;

[0022] (2) Oxidized loofah: In the reactor, add pretreated loofah: 15g, water: 80mL, NaOH: 5g, soak at room temperature for 20 hours, boil for 30min, wash with deionized water until neutral, and then Put it into 100mL of concentrated nitric acid, keep the temperature at 90°C, stir, and reflux for 100 min. After cooling, wash with deionized water and filter with suction until the filtrate is neutral, and dry in a vacuum oven to obtain oxidized loofah;

[0023](3) Preparation of acyl chloride loofah: In the reactor, add 35mL of dimethylformamide, thionyl chloride: 35mL, oxidized loofah: 10g, keep the temperature at 70°C, stir, and reflux for 55 hours, and the reaction is complete Backwashing with acetone to remove the di...

Embodiment 2

[0026] (1) Loofah pretreatment: Loofah comes from the fruit of loofah, which is obtained by peeling and removing the core. Cut the loofah into small pieces, wash with water, dry and crush, and sieve through a 20-mesh sieve to obtain pretreated loofah network;

[0027] (2) Oxidized loofah: In the reactor, add pretreated loofah: 10g, water: 82mL, NaOH: 8g, soak at room temperature for 24 hours, boil for 40min, wash with deionized water until neutral, and then Put it into 80mL of concentrated nitric acid, keep the temperature at 85°C, stir, and reflux for 90 minutes. After cooling, wash with deionized water and filter with suction until the filtrate is neutral, and dry in a vacuum oven to obtain oxidized loofah;

[0028] (3) Preparation of acyl chloride loofah: In the reactor, add 40mL of dimethylformamide, thionyl chloride: 28mL, oxidized loofah: 15g, keep the temperature at 65°C, stir, and reflux for 60 h, and the reaction is complete Backwashing with acetone to remove the dim...

Embodiment 3

[0031] (1) Loofah pretreatment: Loofah comes from the fruit of loofah, which is obtained by peeling and removing the core. Cut the loofah into small pieces, wash with water, dry and crush, and sieve through a 40-mesh sieve to obtain pretreated loofah network;

[0032] (2) Oxidized loofah: In the reactor, add pretreated loofah: 18g, water: 72mL, NaOH: 10g, soak at room temperature for 12 hours, boil for 20min, wash with deionized water until neutral, and then Put it into 90mL of concentrated nitric acid, keep the temperature at 95°C, stir, and reflux for 120 minutes. After cooling, wash with deionized water and filter with suction until the filtrate is neutral, and dry in a vacuum oven to obtain oxidized loofah;

[0033] (3) Preparation of acyl chloride loofah: In the reactor, add 27mL of dimethylformamide, thionyl chloride: 37mL, oxidized loofah: 13g, keep the temperature at 75°C, stir and reflux for 50 h, and the reaction is complete Backwashing with acetone to remove the di...

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Abstract

The invention discloses a preparation method and an application technology of a dimethyl diallyl ammonium chloride modified towel gourd vegetable sponge adsorbent, and is characterized in that the preparation method comprises the steps: peeling and denucleating mature fruits of towel gourd, washing with water to remove soil and impurities, drying, crushing, and carrying out chemical treatment drying to obtain acylating-chlorination towel gourd vegetable sponge; adding, by the mass percentage, 56-71% of dimethyl diallyl ammonium chloride, 10-20% of the acylating-chlorination towel gourd vegetable sponge, 12-26% of water and 0.5-2.0% of ammonium persulfate into a reactor, wherein the sum of the percentages of all the components is 100%; under the nitrogen protection and at a constant temperature of 45-55 DEG C, stirring and carrying out a reflux reaction for 4-5 h; and after cooling, washing with deionized water, carrying out suction filtration until a filtrate is neutral, drying in a vacuum drying oven, and thus obtaining the dimethyl diallyl ammonium chloride modified towel gourd vegetable sponge adsorbent. The adsorbent has the advantages of quite high adsorption capacity on grease, excellent physicochemical and mechanical properties, strong regeneration capacity, capacity of being repeatedly used many times, low cost, greenness and environmental protection.

Description

technical field [0001] The invention relates to a preparation method of a biological adsorbent, which belongs to the technical field of water treatment, and is suitable for the oil removal and purification of oily sewage, in particular to the preparation and application of a dimethyl diallyl ammonium chloride modified loofah adsorbent. Application Technology. Background technique [0002] Oily wastewater mainly comes from the processes of oil extraction, oil refining, oil storage, transportation, and petrochemical production in the petroleum industry. After the oil enters the water body, a water film will be formed on the surface to prevent oxygen from dissolving into the water body, resulting in hypoxia in the water body and biological death. , causing serious environmental pollution. At present, the "Marine Environmental Protection Law of the People's Republic of my country" and other regulations promulgated by our country stipulate that the maximum allowable discharge co...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/40
CPCB01J20/24B01J20/3085B01J2220/4825C02F1/286C02F1/40
Inventor 李慧芝周英杰许崇娟
Owner UNIV OF JINAN
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