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Efficient and recyclable pH test paper and preparation method thereof

A ph test paper, an efficient technology, is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions. It can solve problems such as inability to combine ions, inability to carry, and white oil repulsion Achieve high-efficiency color rendering, easy to carry, and large degrees of freedom

Pending Publication Date: 2022-04-12
浙江正信石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary pH test paper, because its surface is all polar small molecule dyes, has a repelling effect on white oil and cannot bind to all ionized ions
After the above two negative effects are superimposed, it is difficult for ordinary pH test paper to be effectively used in the acid-base test of white oil and derivatives
At present, the method of determining the water-soluble acid or alkali of white oil and its derivatives is often to use a pH tester. Although this instrument can quickly test the acidity and alkalinity of oil products, it cannot be carried and can only be used in fixed locations. have greater restrictions

Method used

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  • Efficient and recyclable pH test paper and preparation method thereof
  • Efficient and recyclable pH test paper and preparation method thereof
  • Efficient and recyclable pH test paper and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 4-vinylpyridine (10.51g, 0.1mol), butane sultone (17.70g, 0.13mol), and dry toluene into a 250ml three-neck flask in turn, stir until fully mixed, and blow nitrogen gas while stirring. The system was reacted for 24 hours at 100°C. After the reaction was completed, white crystals of 4-vinyl-1-(3-sulfobutyl)pyridine were precipitated in the solution. Next, the solution was subjected to suction filtration, while continuously washing with butanone for several times to collect white crystals.

[0029] Pour 4-vinyl-1-(3-sulfobutyl)pyridine (1.22 g, 0.005 mol) into dichloromethane to form a 1 mol / L solution. Next, add amylacrylamide (0.71g, 0.005mol), benzoin (0.0122g) and N,N-methylenebisacrylamide (0.15g) in sequence, mix well and drop the solution evenly on neutral glass fiber filter paper On, react under 365nm ultraviolet lamp for 40min. After drying to remove the solvent, pH test paper is prepared. The nuclear magnetic detection data of the chromogenic substances ...

Embodiment 2

[0031] Add 2,4-vinylpyridine (13.11g, 0.1mol), butane sultone (34.04g, 0.13mol), and dry toluene into a 250ml three-necked flask in turn, stir until fully mixed, and pass into nitrogen. The system was reacted for 30 hours at 115°C. After the reaction was completed, white crystals of 2,4-divinyl-1-(3-sulfobutyl)pyridine were precipitated in the solution. Next, the solution was subjected to suction filtration, while continuously washing with butanone for several times to collect white crystals.

[0032] Pour 2,4-divinyl-1-(3-sulfobutyl)pyridine (1.34 g, 0.005 mol) into dichloromethane to form a 1 mol / L solution. Next, add pentylacrylamide (0.71g, 0.005mol), benzoin butyl ether (0.0134g) and N,N-methylene bisacrylamide (0.15g) in sequence, mix well and drop the solution evenly on the neutral glass On fiber filter paper, react under 365nm ultraviolet light for 30min. After drying to remove the solvent, pH test paper is prepared.

Embodiment 3

[0034]Add 2-vinylpyridine (10.51g, 0.1mol), hexanesultone (21.35g, 0.13mol), and dry toluene into a 250ml three-neck flask in turn, stir until fully mixed, and blow nitrogen gas while stirring. The system was reacted for 20 hours at 75°C. After the reaction was completed, white crystals of 2-vinyl-1-(3-sulfohexyl)pyridine were precipitated in the solution. Next, the solution was subjected to suction filtration, while continuously washing with butanone for several times to collect white crystals.

[0035] Pour 2-vinyl-1-(3-sulfohexyl)pyridine (1.35 g, 0.005 mol) into chloroform to form a 5 mol / L solution. Next, sequentially add lauryl acrylamide (0.71g, 0.005mol), benzoin dimethyl ether (0.0135g) and N,N-methylenebisacrylamide (0.15g), mix well and drop the solution evenly on On cotton non-woven fabric, react under 365nm ultraviolet lamp for 40min. After drying to remove the solvent, pH test paper is prepared.

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Abstract

The invention discloses a preparation method of efficient and recyclable pH test paper, and particularly relates to test paper capable of changing color in real time according to the pH of an oil product. The preparation method of the pH test paper comprises the following steps: mixing a zwitterionic compound synthesized by reaction of alkenyl pyridine and sultone with an initiator, a cross-linking agent and an amphiphilic monomer to prepare a precursor solution, uniformly soaking the precursor and a matrix, and drying in a heating or ultraviolet radiation mode to prepare the pH test paper. The test paper has the advantages of being recyclable and high in detection efficiency, and can be applied to the field of detection of white oil and derivatives thereof.

Description

technical field [0001] The invention relates to an efficient and recyclable pH test paper preparation method, in particular to a test paper that can change color in real time according to the pH of oil products. Background technique [0002] Petroleum is an important basic raw material of modern industry, and human life is also closely related to petroleum. With the rapid development of science and technology and the rapid growth of the global population, people's demand for oil is also increasing. Petroleum is a complex mixture of alkanes, cycloalkanes, and aromatics, but oil is often contaminated during processing or transportation, thereby introducing organic acids or other impurities. Although the content of such impurities is very small, under the action of water and oxygen, they will cause corrosion to the metal. Among them, white oil is a product of petroleum refining, and its main component is C 16 ~C 31 The mixture of normal isoparaffins can be used in vaccines,...

Claims

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Application Information

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IPC IPC(8): G01N21/80C08F226/06C08F220/54C08F222/38
Inventor 冯祎平宣梦达莫学坤徐冰冰周爱静
Owner 浙江正信石油科技有限公司
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