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Preparation and application of a flax adsorbent

A technology of adsorbent and flax, which is applied in the field of preparation of biological adsorbents, can solve the problems of few and great influence of pH of adsorption system, and achieve the effects of fast adsorption, excellent mechanical strength and high adsorption efficiency.

Inactive Publication Date: 2015-10-21
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adsorption amount of the metal ion adsorbent in the water system obtained by chemical modification of flax is small, and it is greatly affected by the pH of the adsorption system. The patent application number: 201110276212.9 discloses a preparation method and application of mercapto flax , mercapto flax on Cd 2+ The adsorption capacity can be as high as 282mg / g, and the highest adsorption rate can reach 99.6%. 2+ The maximum adsorption capacity is 519mg / g, for Cu 2+ The maximum adsorption capacity of flax is 160mg / g, and the adsorption of dyes prepared by flax is rarely reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Flax pretreatment: wash the short-fiber flax discarded by the flax textile factory with water, dry it, crush it, and sieve it with a 10-mesh sieve to obtain pretreated flax;

[0021] (2) Degummed flax: soak 20 g of pretreated flax in 100 mL of a solution containing 1.5% by mass NaOH and 1.0% by mass of emulsifier OP-10, soak at room temperature for 10 hours, and then boil for 15 minutes. Add water continuously during boiling to keep the volume of the solution constant, wash with deionized water until neutral after cooling, and dry at 75°C after suction filtration to obtain degummed flax;

[0022] (3) Preparation of epichlorohydrin modified flax: In the reactor, add epichlorohydrin: 20mL, degummed flax: 10g, NaOH: 2g; isopropanol: 5mL; water: 33mL, keep stirring at 50°C , Reflux reaction for 2 h, after cooling, wash with deionized water and suction filter until the filtrate is neutral, wash with a small amount of ethanol, and dry in a vacuum oven at 55°C to obtain ep...

Embodiment 2

[0024] (1) Flax pretreatment: wash the short-fiber flax discarded by the flax textile factory with water, dry it, crush it, and sieve it with a 10-mesh sieve to obtain pretreated flax;

[0025] (2) Degummed flax: Soak 25g of pretreated flax in 100mL solution containing 2% NaOH by mass percent and 0.5% emulsifier OP-10 by mass percent, soak at room temperature for 6 hours, and then boil for 20 minutes. Add water continuously during boiling to keep the volume of the solution constant, wash with deionized water until neutral after cooling, and dry at 75°C after suction filtration to obtain degummed flax;

[0026] (3) Preparation of epichlorohydrin modified flax: In the reactor, add epichlorohydrin: 22mL, degummed flax: 25g, NaOH: 4; isopropanol: 5mL; water: 44mL, keep the temperature at 55°C and stir , Reflux reaction for 4 hours, after cooling, wash with deionized water, and suction filter until the filtrate is neutral, wash with a small amount of ethanol, and dry in a vacuum ov...

Embodiment 3

[0028] (1) Flax pretreatment: wash the short-fiber flax discarded by the flax textile factory with water, dry it, crush it, and sieve it with a 10-mesh sieve to obtain pretreated flax;

[0029](2) Degummed flax: soak 30 g of pretreated flax in 100 mL of a solution containing 4% NaOH by mass percent and 1.5% emulsifier OP-10 by mass percent, soak at room temperature for 12 hours, and then boil for 10 minutes. Add water continuously during boiling to keep the volume of the solution constant, wash with deionized water until neutral after cooling, and dry at 75°C after suction filtration to obtain degummed flax;

[0030] (3) Preparation of epichlorohydrin modified flax: In the reactor, add epichlorohydrin: 40mL, degummed flax: 15g, NaOH: 4g; isopropanol: 5mL; water: 36mL, keep stirring at 50°C , Reflux reaction for 3 h, after cooling, wash with deionized water and suction filter until the filtrate is neutral, wash with a small amount of ethanol, and dry in a vacuum oven at 50°C to...

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Abstract

The invention discloses a preparation method and application technology of an epoxy chloropropane modified flax adsorbent. The preparation method is characterized by washing waste short fiber flax of a flax textile factory by using water, drying and crushing; processing by using NaOH and OP water solution and drying to obtain degummed flax; adding the following components in percentage by mass in a reactor: 22-40% of epoxy chloropropane, 12-25% of degummed flax, 4-8% of NaOH, 5-10% of isopropyl alcohol and 32-55% of water, wherein the sum of all the components is 100%; stirring at the constant temperature of 55-65 DEG C, carrying out backflow reaction for 1.0-4h, cooling, washing by using de-ionized water, carrying out suction extracting and filtering until the filtrate is neutral, washing by using a small amount of ethanol, drying in a 50-55 DEG C vacuum drying box, so as to obtain the epoxy chloropropane modified flax. The adsorbent has very high adsorbing capacity to basic dye, has high regeneration property, can be used repeatedly for several times, and is low in cost and environment-friendly.

Description

technical field [0001] The invention relates to a preparation method of a biological adsorbent and the technical field of application of dye adsorption in industrial wastewater, in particular to a preparation method of an epichlorohydrin modified flax adsorbent and an application technology for adsorption and separation of basic dyes in sewage. Background technique [0002] Resource shortage and environmental pollution have become two major problems in today's world. Therefore, using natural renewable resources to develop environmentally friendly products and technologies will become an inevitable trend of sustainable development. Flax is an annual herb, one of the most valuable ecological resources and a renewable resource. At present, the planting area of ​​flax in the country is more than 3 million mu, and the output of long fiber is generally about 60kg / mu. As a textile fiber, flax has a series of excellent properties, such as softness, good luster, crispness, coolness, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
Inventor 李慧芝许崇娟庄海燕
Owner UNIV OF JINAN
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