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Preparation method of 2,5- dyhydroxyl benzoic acid molecule blotting membrane and application of 2,5- dyhydroxyl benzoic acid molecule blotting membrane

A technology of dihydroxybenzoic acid and molecular imprinting, applied in chemical instruments and methods, separation/purification of carboxylic acid compounds, membrane technology, etc., can solve problems such as water and air pollution, eye and skin hazards, and environmental hazards. Achieve the effects of not being easily damaged, speeding up the synthesis, and reusing more times

Inactive Publication Date: 2013-07-10
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production process of salicylic acid is often accompanied by the impurity 2,5 dihydroxybenzoic acid, but 2,5 dihydroxybenzoic acid is toxic and irritating to the eyes, skin, mucous membranes and upper respiratory tract
Some data show that if the cosmetics added with 2,5 dihydroxybenzoic acid are used for a long time, it may cause serious damage to the eyes and skin, and it is also harmful to the environment, causing pollution to water bodies and the atmosphere

Method used

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  • Preparation method of 2,5- dyhydroxyl benzoic acid molecule blotting membrane and application of 2,5- dyhydroxyl benzoic acid molecule blotting membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Surface activation of alumina ceramic membrane

[0049] Take 6 pieces of ceramic membranes and place them in 60ml of 30% hydrogen peroxide solution, boil for 15min, take them out, boil them in 60ml of deionized water for 15min, dry them at 60°C, and store them in argon.

[0050] (2) Preparation of ionic liquids

[0051] Take 10ml of 1-methylimidazole and chlorinated butane according to the molar ratio of 1:1 and add it to a round-bottomed flask equipped with a reflux condenser, heat and stir at 70°C for 48h to obtain a viscous transparent liquid, cool to room temperature, and then use 40mL Ethyl acetate was washed three times, and then the remaining ethyl acetate was removed while heating in vacuum at 70 ° C, and finally the ionic liquid semi-finished product 1-butyl-3-methylimidazolium chloride was obtained.

[0052] Add 1 mol of 1-butyl-3-methylimidazolium chloride prepared into 500 mL of distilled water, then slowly add 1 moL of hexafluorophosphoric acid (to avo...

Embodiment 2

[0063] (1) Surface activation of alumina ceramic membrane

[0064] Take 8 pieces of ceramic membranes and place them in 80ml of 30% hydrogen peroxide solution, boil for 15min, take them out and boil in 80ml of deionized water for 15min, dry at 60°C and store in argon.

[0065] (2) Preparation of ionic liquids

[0066] Take 50ml of 1-methylimidazole and chlorinated butane according to the molar ratio of 1:2 into a round bottom flask equipped with a reflux condenser, heat and stir at 70°C for 72h to obtain a viscous transparent liquid, cool to room temperature, and then use 200mL Ethyl acetate was washed three times, and then the remaining ethyl acetate was removed while heating in vacuum at 70 ° C, and finally the ionic liquid semi-finished product 1-butyl-3-methylimidazolium chloride was obtained.

[0067] Add 1 mol of 1-butyl-3-methylimidazolium chloride prepared into 500 mL of distilled water, then slowly add 1.5 mol of hexafluorophosphoric acid (to avoid sudden changes in ...

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Abstract

The invention relates to a preparation method of a 2,5-dyhydroxyl benzoic acid molecule blotting membrane and application of the 2,5- dyhydroxyl benzoic acid molecule blotting membrane, belongs to the technical field of material preparation and in particular relates to a method for preparing the 2,5- dyhydroxyl benzoic acid molecule blotting membrane, which adopts an alumina ceramic membrane as a substrate, adopts impurities 2,5- dihydroxy-benzoic acid (GA) in salicylic acid as a template molecule, adopts cinnamic acid as functional monomer, adopts gamma-methylacryloyloxypropyl trimethoxy silane (MPS) as a cross-linking agent, adopts ionic liquid as 1-butyl-3-methylimidazole hexafluorophosphate as a catalyst and adopts azodiisobutyronitrile (AIBN) as an initiator. Static adsorption and selective permeability experiment are used for researching adsorption equilibrium and selective recognition performance of the prepared molecule blotting membrane. According to the results, the obtained 2,5- dyhydroxyl benzoic acid molecule blotting membrane has higher adsorption capacity and excellent recognition performance of the 2,5- dyhydroxyl benzoic acid molecule.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and relates to a preparation method of a novel imprinted membrane for removing 2,5 dihydroxybenzoic acid (Gentisic acid, GA) in salicylic acid, in particular to a molecular imprint of 2,5 dihydroxybenzoic acid Membrane and its preparation method and application. Background technique [0002] Membranes widely exist in nature and play the functions of separation, separation and selective permeation, and have been widely used in many fields such as chemical engineering, biotechnology, medicine, food industry, environmental protection, and oil exploration. Membrane separation technique (MST) has the functions of separation, concentration, purification and refining, and has obvious advantages. It has been widely used in the production process of enterprises due to its advantages of high efficiency, energy saving, convenient operation, molecular level filtration and environmental friendlin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/286B01J20/30B01D71/02B01D69/02B01D67/00C07C65/10C07C51/42
Inventor 孟敏佳张敏潘建明戴江栋闫永胜
Owner JIANGSU UNIV
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