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Application of fluorescent tracer type itaconic acid and aspartic acid copolymer in preparation of water treatment agent

A technology of itaconate-aspartic acid copolymer and itaconate-aspartic acid, which can be used in water/sludge/sewage treatment, fluorescence/phosphorescence, luminescent materials, etc., can solve the limitation of development and application, and react raw materials Rare, decomposition and other problems, to achieve the effect of online dosing, simplify on-site operation, and reduce interference

Active Publication Date: 2019-02-15
NANTONG UNIV TECH TRANSFER CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current domestic research is mainly focused on the modification of polymers, which requires that the original water treatment agent must have modifiable amine or carboxyl groups, and the conditions required for polymer modification are relatively high, such as high temperature and high pressure. , so it is relatively difficult
For example, Chinese patent CN 1229091A discloses a kind of water treatment agent with tracer and anti-scaling dispersing effect, but the water treatment agent is directly prepared by reacting with polymer through (trans)amide reaction between organic fluorescent derivatives. Fluorescence-labeled polymers, this reaction requires high temperature and high pressure, and requires no obvious decomposition of the polymer during the reaction. Since the raw materials for the reaction are rare, and most polymers have decomposition problems under this high temperature and high pressure, this greatly limits the application of this technology. Further development and application

Method used

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  • Application of fluorescent tracer type itaconic acid and aspartic acid copolymer in preparation of water treatment agent
  • Application of fluorescent tracer type itaconic acid and aspartic acid copolymer in preparation of water treatment agent
  • Application of fluorescent tracer type itaconic acid and aspartic acid copolymer in preparation of water treatment agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1 Weigh 10 g (36.09 mmol) of 4-bromo-1,8-naphthalene anhydride into a three-necked flask, add 30 mL of ethanol, stir slowly, and drop N,N-dimethyl-1,3-propanediamine 9.1 The mixed solution of mL (72.18mmol) and 20mL ethanol was dripped in half an hour, and slowly rose to reflux temperature at the same time, followed by thin-layer chromatography until the reaction was completed, cooled and filtered to obtain a yellow solid, and recrystallized from ethanol to obtain the target product ( I).

[0033] Weigh 5 g (13.84 mmol) of the product (I) generated above in a three-necked flask, add 20 mL of ethylene glycol methyl ether, stir slowly, add dropwise a mixture of 2.7 mL (27.7 mmol) of n-butylamine and 10 mL of ethanol, and simultaneously Slowly rise to 130°C, followed by thin-layer chromatography until the end of the reaction, suction filtration under reduced pressure to remove excess ethylene glycol methyl ether, DMF recrystallization, to obtain the target product ...

Embodiment 2

[0035] Example 2 Put 40mL of deionized water, aspartic acid 9.3g (0.28mol), sodium hydroxide 0.16g and fluorescent monomer (FT ) 0.3g, heated up to 80°C under stirring, passed nitrogen to remove oxygen, and under the protection of nitrogen, added dropwise 15g of 30% hydrogen peroxide solution (accounting for about 10% of monomer mass), 50mL of itaconic acid solution (Containing IA 36.4g, 0.28mol), dripping finished within 2h, continued to keep warm for 1h, cooled and discharged to obtain the product FT-IA-ASP (brown liquid) of the present invention.

[0036] The excitation wavelength and emission wavelength of the polymer are similar to those of the fluorescent monomer, which are also 474nm and 554nm respectively. figure 1 , that is, the wavelength does not shift after polymerization. At the same time, the concentration of the polymer and the relative fluorescence intensity have a good linear relationship, the linear correlation coefficient is 0.99968, and the detection limit...

Embodiment 3

[0038] Example 3 The static scale inhibition method was used to evaluate the scale inhibition performance of the fluorescent polymer on calcium carbonate. The test conditions are as follows:

[0039] Temperature: 80°C; Drug: the product of Example 2; Dosing concentration: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20mg·L -1 ;Test time: 10h; Test configuration water: Ca 2+ 250mg·L -1 , HCO 3 - 250mg·L -1 (both CaCO 3 Calculated), the concentration factor is 1.5 times; at the same time, do a blank experiment without adding medicament. According to this method, the dosage of the drug is 12mg L -1 , the scale inhibition rate to calcium carbonate is 96.1%. see attached results Figure 4 .

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Abstract

The invention discloses application of a fluorescent tracer type itaconic acid and aspartic acid copolymer in preparation of a water treatment agent. A preparation method of the fluorescent tracer type itaconic acid and aspartic acid copolymer comprises the steps of using 4-bromine-1,8-naphthalic anhydride, ethanol and N, N-dimethyl 1, 3-propane diamine as raw materials to obtain 4-bromine-N-(3-N', N'-dimethyl aminopropyl)-1, 8-naphthalimide first; and then using ethanol and ethylene glycol methyl ether as a mixed solvent to react with n-butylamine so as to obtain a product; enabling the product to react with allyl chloride to obtain 4-butylamino-N-(3-N', N'-dimethyl aminopropyl) naphthalimide diallyl ammonium chloride; and using a water-phase one-step synthesis method to copolymerize a fluorescent monomer FT, itaconic acid and aspartic acid to obtain a product. The application of the fluorescent tracer type itaconic acid and aspartic acid copolymer in the preparation of the water treatment agent, disclosed by the invention, has the advantages that a target has multiple functions such as a fluorescent tracer function and a scale inhibition and dispersion function, the formed scaleis easy to be flushed away by water, and better dispersion performance is shown.

Description

[0001] This application is a divisional application with application number: 201611006488.4, application date: 2016-11-16, and name "fluorescent tracer itaconate-aspartic acid copolymer and its preparation method and application". technical field [0002] The invention relates to a preparation method and related properties of a scale-inhibiting dispersant for industrial circulating cooling water systems, and belongs to the field of research and new technology development of industrial circulating water treatment agents, in particular to a fluorescently labeled itaconate aspartic acid Copolymers and methods for their preparation and use. Background technique [0003] In industrial circulating cooling water systems, the concentration of water treatment chemicals used is a very important parameter. Too high or too low concentration of the medicament will bring adverse effects. The traditional technical process of detecting water treatment chemicals is complicated and has many ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/04C08F222/02C08F226/02C09K11/06C02F5/12G01N21/64
CPCC02F5/12C08F283/04C09K11/06G01N21/64C08F222/02
Inventor 张跃华张睿智张其平朱西挺陈娇张所宜袁勇胡兰萍
Owner NANTONG UNIV TECH TRANSFER CENT CO LTD
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