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Preparation and application of (mercaptopropyl)trimethoxy silane modified flax adsorbent

A technology of mercaptopropyltrimethoxysilane and adsorbent, which is applied in the field of biosorbent preparation, can solve the problems of great influence on the pH of the adsorption system, and achieve the effects of easy industrial production, good desorption performance and large adsorption capacity

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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adsorption amount of the adsorbent of metal ions 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 is 160mg / g, and the adsorption prepared by flax modification has not been reported for arsenic adsorption.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Flax pretreatment: wash the flax with water, cut it short, dry it and crush it to obtain pretreated flax;

[0023] (2) Treatment solution A: In the reactor, add 12g of sodium hydroxide and 86mL of water, stir to dissolve, then add 2g of sodium dodecylsulfonate, stir, and mix well to obtain treatment solution A;

[0024] (3) Treatment B: In the reactor, add 8g of potassium periodate and 92mL of water, stir and dissolve, adjust the pH between 0.5 and 1.5 with sulfuric acid, stir, and mix well to obtain treatment solution B;

[0025] (4) Oxidized flax: Mix 10 g of pretreated flax with 150 mL of treatment solution A, soak at room temperature for 12 h, then boil for 25 min, after cooling, separate solid from liquid, wash with deionized water until neutral, and put the obtained solid into 150 mL of treatment B, mixed, stirred, heated to 35 ° C, reacted for 5 hours, cooled, filtered, washed with deionized water until neutral, dried to obtain oxidized flax;

[0026] (5) Pr...

Embodiment 2

[0028] (1) Flax pretreatment: wash the flax with water, cut it short, dry it and crush it to obtain pretreated flax;

[0029] (2) Treatment solution A: In the reactor, add 20g of sodium hydroxide and 79mL of water, stir to dissolve, then add 1.0g of polyoxyethylene ether, stir, and mix well to obtain treatment solution A;

[0030] (3) Treatment B: In the reactor, add 12g of potassium periodate and 88mL of water, stir and dissolve, adjust the pH between 0.5 and 1.5 with sulfuric acid, stir, and mix well to obtain treatment solution B;

[0031] (4) Oxidized flax: Mix 10 g of pretreated flax with 80 mL of treatment solution A, soak at room temperature for 16 h, then boil for 20 min, after cooling, separate solid from liquid, wash with deionized water until neutral, and put the obtained solid into 80 mL of treatment B, mixed, stirred, heated up to 40 ° C, reacted for 6 hours, cooled, filtered, washed with deionized water until neutral, dried to obtain oxidized flax;

[0032] (5) Pr...

Embodiment 3

[0034] (1) Flax pretreatment: wash the flax with water, cut it short, dry it and crush it to obtain pretreated flax;

[0035] (2) Treatment solution A: In the reactor, add 25g of sodium hydroxide and 70mL of water, stir to dissolve, then add 5g of polyoxyethylene fatty acid amide, stir, and mix well to obtain treatment solution A;

[0036] (3) Treatment B: In the reactor, add 16g of potassium periodate and 84mL of water, stir to dissolve, adjust the pH between 0.5 and 1.5 with sulfuric acid, stir, and mix well to obtain treatment solution B;

[0037] (4) Oxygenated flax: Mix 5 g of pretreated flax with 120 mL of treatment solution A, soak at room temperature for 10 h, and then boil for 30 min. In mL treatment B, mix, stir, heat up to 35°C, react for 4 hours, after cooling, filter, wash with deionized water until neutral, dry to obtain oxidized flax;

[0038] (5) Preparation of flax modified by mercaptopropyltrimethoxysilane: In the reactor, add 56mL N,N-dimethylformamide, 30g...

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Abstract

The invention discloses a preparation method and an application technology of a (mercaptopropyl)trimethoxy silane modified flax adsorbent. The preparation method is characterized by comprising the following steps: cleaning and bobbing flax, then drying and crushing the flax, respectively treating the crushed flax with a treatment fluid A and a treatment fluid B, then carrying out drying so as to obtain oxidized flax and adding, by mass, 50 to 75% of N,N-dimethyl formamide and 10 to 30% of the oxidized flax into a reactor; and carrying out stirring and heating to 65 to 75 DEG C, slowly adding 12 to 25% of thionyl chloride drop by drop, allowing a temperature to rise to 80 to 90 DGE C after completion of addition drop by drop, carrying out a thermostatic reaction for 3 to 5 h, then carrying out cooling to room temperature, adding 1.0 to 3.0% of (mercaptopropyl)trimethoxy silane, carrying out a reaction under stirring at room temperature for 6 to 12 h and then successively carrying out filtering, washing with N,N-dimethyl formamide and vacuum drying so as to obtain the (mercaptopropyl)trimethoxy silane modified flax adsorbent; wherein all the above-mentioned components sum to 100%. The adsorbent has the advantages of high adsorption capacity to arsenic, excellent physical, chemical and mechanical performance, strong regeneration capability, capacity of being repeatedly used many times, low cost, greenness and environment-friendliness.

Description

technical field [0001] The invention relates to a preparation method of a biological adsorbent and the technical field of application of arsenic adsorption in water, in particular to a preparation method and application technology of a mercaptopropyltrimethoxysilane modified flax adsorbent. Background technique [0002] Flax is the earliest natural plant fiber used by humans, with a history of more than 10,000 years. Flax is a pure natural fiber. Because flax fiber is soft, strong, shiny, wear-resistant, small in water absorption, fast in water dissipation, and has a large expansion rate after absorbing moisture, it can make the textile tissue tight and not easy to permeate. It is an excellent textile raw material. It has notable characteristics such as sweat absorption, good air permeability and harmlessness to the human body, and is more and more valued by human beings. Using flax as a natural renewable resource to develop environmentally friendly products and technologie...

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 李慧芝庄海燕李冬梅