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Preparation method and use of sulfydryl flax

A flax and sulfhydryl technology, applied in the field of preparation and application of sulfhydryl flax, can solve the problem of no metal ion adsorption, etc., and achieve the effects of fast adsorption, large adsorption capacity and good desorption performance.

Inactive Publication Date: 2012-03-28
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two patents only have the preparation method of sulfhydryl adsorbent, and there is no description of the adsorption of metal ions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) flax pretreatment: take the discarded short fibers of flax weaving, wash with water, remove impurities, pulverize after drying, and sieve with a 60-mesh sieve;

[0014] (2) Mix the crushed flax according to 32% of the total mass with a concentration of 0.4mol / L NaOH solution and 1% OP solution to azeotrope for 1.5h, add distilled water continuously during the azeotropic period to keep the solution volume constant, cool Finally, wash with deionized water until the pH is 7, soak in isopropanol for 4 hours, filter with suction and dry at 60°C to obtain degummed flax.

[0015] (3) In a stoppered Erlenmeyer flask, add 20mL of thioglycolic acid (filter out the precipitate) and 15mL of tetrahydrofuran, add 0.5mL of glacial acetic acid, add two drops of concentrated sulfuric acid, mix well, add 9g of degummed flax, stopper, and set at 55 ℃, reflux with stirring for 4 hours, then wash with deionized water and suction filter until the filtrate is neutral, wash with a small am...

Embodiment 2

[0017] (1) flax pretreatment: take the discarded short fibers of flax weaving, wash with water, remove impurities, pulverize after drying, and sieve with a 60-mesh sieve;

[0018] (2) Mix the crushed flax according to 40% of the total mass with a concentration of 0.6mol / L NaOH solution and 2% OP solution to azeotrope for 1h, add distilled water continuously during the azeotropic period to keep the solution volume constant, after cooling Wash with deionized water until the pH is 7, soak in isopropanol for 3 hours, filter with suction and dry at 55°C to obtain degummed flax.

[0019] (3) In a stoppered Erlenmeyer flask, add 30mL of thioglycolic acid (filter out the precipitate) and 20mL of tetrahydrofuran, add 0.5mL of glacial acetic acid, add two drops of concentrated sulfuric acid, mix well, add 12g of degummed flax, stopper, at 50 ℃, reflux with stirring for 6 hours, then wash with deionized water and suction filter until the filtrate is neutral, wash with a small amount of e...

Embodiment 3

[0021] (1) flax pretreatment: take the discarded short fibers of flax weaving, wash with water, remove impurities, pulverize after drying, and sieve with a 60-mesh sieve;

[0022] (2) Mix the crushed flax according to 35% of the total mass with a concentration of 0.5mol / L NaOH solution and 1.5% OP solution to azeotrope for 1h, add distilled water continuously during the azeotropic period to keep the solution volume constant, after cooling Wash with deionized water until the pH is 7, soak in isopropanol for 2 hours, filter with suction and dry at 60°C to obtain degummed flax.

[0023] (3) In a stoppered Erlenmeyer flask, add 25mL of thioglycolic acid (filter out the precipitate) and 25mL of tetrahydrofuran, add 0.5mL of glacial acetic acid, add two drops of concentrated sulfuric acid, mix well, add 12g of degummed flax, stopper, and place at 60 ℃, reflux with stirring for 4 hours, then wash with deionized water and suction filter until the filtrate is neutral, wash with a small...

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Abstract

The invention discloses a preparation method and use of sulfydryl flax, which is characterized by comprising: adding 45 to 52 mass percent of thioglycolic acid, 35 to 40 mass percent of tetrahydrofuran, 23 to 30 mass percent of degummed flax, 1 to 1.5 mass percent of glacial acetic acid and 0.15 to 0.3 mass percent of concentrated sulfuric acid into a triangular flask with a plug, stirring and refluxing for 4 to 6 hours at 50 to 60 DEG C, washing with deionized water, filtering under vacuum till the filtrate is neutral, washing with a small amount of ethanol, drying in an oven at 35 DEG C, and obtaining the sulfydryl flax. The sulfydryl flax has high metal ion absorbability, has properties of sulfydryl and can be directly use to absorb and elute various metal ions in water, the absorptionefficiency and speed are high, the physical, chemical and mechanical properties of the sulfydryl flax are high, the sulfydryl flax can be used in a wide pH value range, the high regenerability of thesulfydryl flax, makes the repeated use number of the sulfydryl flax 30 percent higher than that of sulfydryl cotton, the waste from flax title is utilized, cost is saved, and environment pollution isavoided.

Description

technical field [0001] The invention relates to a preparation method and application technology of an adsorbent for metal ions in a water system, in particular to a preparation method and application technology of mercapto flax. Background technique [0002] 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, moisture absorption and air permeability, etc. It is a very precious textile fiber raw material. However, about 2% of the short fibers in the weaving process are wastes. The incomplete utilization of these wastes is a serious waste of flax resources and pollutes the environment where the enterprise is located. Making full use of these short fibers can reduce environmental pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/58
Inventor 李慧芝许崇娟庄海燕卢燕谢文秀
Owner UNIV OF JINAN
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