Methoxy group naphthyl fluorescence marked water treating agent and its preparing method

A methoxynaphthalene, fluorescent labeling technology, applied in water/sludge/sewage treatment, chemical instruments and methods, descaling and water softening, etc. The effect of reducing interference, simplifying field operation, and stable performance

Inactive Publication Date: 2006-06-07
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthesis of the water treatment agent is made through the amide transformation reaction between the organic fluorescent derivative and the polymer. Most polymers have decomposition problems under this high temperature and pressure, which greatly limits the further development and application of this technology

Method used

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  • Methoxy group naphthyl fluorescence marked water treating agent and its preparing method
  • Methoxy group naphthyl fluorescence marked water treating agent and its preparing method
  • Methoxy group naphthyl fluorescence marked water treating agent and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 Add 4.65g (19.99mmol) 4-chloro-1.8-naphthalic anhydride in a 250mL four-necked flask equipped with a thermometer, condenser, dropping funnel and constant speed stirring device, and use glacial acetic acid under stirring and heating 50mL was dissolved, and 2.05g (20.10mmol) of 3-dimethylaminopropylamine was added dropwise, and reacted under reflux for 5h after the drop was completed. Cool to room temperature, add a certain amount of water to dilute, then neutralize with 50% sodium hydroxide solution, cool, filter with suction to obtain brown solid A, and dry it.

[0018] Add 6g of solid A into a 250mL four-neck flask equipped with a thermometer, condenser, nitrogen vent tube and constant speed stirring device, dissolve it with methanol, add about 2g of sodium methoxide, and pass N 2 , Reacted under reflux for 6h. Cool to room temperature, add a certain amount of hydrochloric acid to neutralize, and then distill off the solvent methanol under reduced pressure. ...

Embodiment 2

[0020] Example 2 Add 3.5g of phosphorous acid, 0.5g of fluorescent monomer in Example 1 and 3.5mL of telogen isopropanol into the reactor, stir and mix evenly, raise the temperature to 80°C, and drop over Ammonium sulfate 1.33g aqueous solution and the mixture of monomeric acrylic acid 8.99g and acrylamide 17.65g were added dropwise in about 2 hours. Keep stirring at this temperature for 2-3 hours and cool to room temperature to obtain the product.

[0021] The UV absorption spectrum of the polymer is similar to that of the fluorescent monomer, respectively at 194nm -1 、240nm -1 、378nm -1 There is absorption. Its excitation and emission wavelengths are also 378nm and 450nm, respectively. The fluorescence intensity was enhanced after copolymerization. The reason for the enhanced fluorescence intensity may be due to the formation of hydrogen bonds after copolymerization, because some aromatic carbonyl compounds and nitrogen heterocyclic compounds, their (π, π * ) singlet en...

Embodiment 3

[0023] Example 3 Add 7.0 g of diethyl phosphite and 2.05 g of the fluorescent monomer in Example 1 into the reactor, stir and mix evenly, raise the temperature to 90°C, and add 3.52 g of ammonium persulfate aqueous solution and The mixture of monomeric acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid (17.25g) was added dropwise in 2.5h, then the reaction temperature was maintained and the reaction was stirred for 2h. After cooling, a yellow viscous substance was obtained, namely the product.

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Abstract

The present invention discloses water treating agent containing methoxy naphthalene as fluorescent marker. The water treating agent is prepared through the first reaction of 4-chloro-1, 8-naphthalic anhydride, glacial acetic acid and 3-dimethylamino propylamine to obtain 4-chloro-N-3-dimethylamino propyl-naphthyl imide; the subsequent reaction with sodium methoxide to introduce methoxy group and obtain 4, 4-methoxyl-N-3-dimethylamino propyl-naphthyl imide, which is reacted with allyl chloride to obtain quaternary ammonium salt of 4-methoxyl-N-3-dimethylamino propyl-naphthyl imide allyl chloride as fluorescent monomer with fluorescent characteristic and double bond; and the final polymerization with phosphorus containing compound, acrylic acid and other monomer to obtain the multifunctional water treating agent with corrosion retarding, scale inhibiting, dispersing and fluorescent tracing functions.

Description

a technical field [0001] The invention relates to a corrosion and scale inhibitor for industrial circulating water systems and a preparation method thereof, in particular to a methoxynaphthalene fluorescent-labeled water treatment agent and a preparation method thereof. Two background technology [0002] In order to quickly and easily determine the concentration of corrosion and scale inhibitors in industrial circulating water systems (especially the concentration of polymers that cannot be easily detected by chemical methods), fluorescent tracer technology is used to realize online detection and automatic addition of water treatment chemicals. Research on drug control technology has always been a hot spot. Chinese patent CN 1229091A discloses a kind of water treatment agent with both tracing and scale inhibition and dispersing effects. Its synthesis method is to adopt 2-amino-7-naphthalenesulfonic acid or 1-amino-4,8-dinaphthalenesulfonic acid Add a certain proportion of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/00
Inventor 夏明珠雷武平春霞周志高王风云
Owner NANJING UNIV OF SCI & TECH
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