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Fluorescent naphthalimide polymers and solutions thereof for water system fouling control

A fluorescent polymer, polymer technology, used in fluorescence/phosphorescence, luminescent materials, scale removal and water softening, etc., can solve problems such as inability to maintain free chlorine, low solubility, and damage to fluorescent signals

Pending Publication Date: 2022-03-11
诺力昂化学品国际有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A major disadvantage of the process described in US Patent Application No. 6,645,428 is that we have found that the monomers do not fully react to polymer and remain in the product
[0014] Certain other non-quaternized naphthalimide derivative monomers (such as those disclosed in RU2640339) also have fluorescent signals, but their solubility in water is low, so it is difficult to Difficulty forming water soluble fluorescent water treatment polymers using these monomers and aqueous compositions of these monomers
[0015] Non-quaternized fluorescent naphthalimide polymers are compatible with water treatment systems and bind well in compositions containing commonly used chlorine-based biocides, so they can be used in water treatment systems where quaternized polymers would Chlorine-based fungicides will react, possibly destroying the fluorescent signal, and may not retain free chlorine

Method used

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  • Fluorescent naphthalimide polymers and solutions thereof for water system fouling control
  • Fluorescent naphthalimide polymers and solutions thereof for water system fouling control
  • Fluorescent naphthalimide polymers and solutions thereof for water system fouling control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0460] Polymer Example 1: Synthesis of N-allyl Naphthalimide Polymer

[0461] 190.1 g of deionized water was initially added to a 1 liter glass reactor (equipped with a stirrer inlet, water cooled condenser, thermocouple and adapters (for addition of monomer and initiator solutions)). The reactor contents were heated to 95°C. By dissolving 298.4g acrylic acid (4.14mol, 94.5mol% polymer) in 23.1g DMF, 2.59g N-allyl naphthalimide (monomer embodiment 1, molecular weight 237, 0.0109mol, 0.25mol% polymerization The mixed monomer solution composed of the substance) is mixed, and then sent into the reactor according to the measured slow addition amount, and stirred for more than 4 hours. Simultaneously, a solution of 24.1 g of sodium hypophosphite monohydrate (0.23 mol, 5.28 mol% polymer) dissolved in 72 g of water was injected into the reactor for more than 4 hours, starting at the same time as the monomer solution. Simultaneously, an initiator solution of 6.68 g of sodium persulf...

Embodiment 2

[0462] Polymer Example 2: Synthesis of N-allyl Naphthalimide Polymer

[0463]190.3 g of deionized water was first added to a 1 liter glass reactor (equipped with stirrer inlet, water cooled condenser, thermocouple and adapters (for addition of monomer and initiator solutions)). The reactor contents were heated to 95°C. By dissolving in 46.6g DMF 298.4g acrylic acid (4.14mol, 94.23mol% polymer), 5.18g N-allyl naphthalimide (monomer embodiment 1, molecular weight 237, 0.0218mol, 0.5mol% polymerization The mixed monomer solution composed of the substance) is mixed, and then sent into the reactor according to the measured slow addition amount, and stirred for more than 4 hours. 24.1 g of sodium hypophosphite monohydrate (0.23 mol, 5.27 mol% polymer) dissolved in 72 g of water was simultaneously injected into the reactor over 4 hours, starting at the same time as the monomer solution. Simultaneously, an initiator solution of 6.68 g of sodium persulfate dissolved in 68.4 g of wate...

Embodiment 3

[0464] Embodiment 3: Fluorescent signal intensity

[0465] The polymer samples of Polymer Examples 1 and 2 were each diluted to 10 ppm in water, and the fluorescence signal was determined by exciting the samples at the excitation wavelength and measuring at the emission wavelength described in Table 1.

[0466] Table 1: Fluorescence data of polymers

[0467]

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Abstract

The invention discloses a fluorescent water-soluble water treatment polymer suitable for scale inhibition of an industrial water system. The water treatment polymer comprises a non-quaternized fluorescent naphthalimide derivative monomer. Meanwhile, the invention also discloses a preparation method of the monomer, a preparation method of the polymer, a scale inhibition method of an industrial water system, and a use method of the polymer in the aspects of coagulation and flocculation and in cleaning application.

Description

[0001] priority claim [0002] This application claims priority from U.S. Provisional Patent Application No. 62 / 853 620, filed May 28, 2019, and European Patent Application No. 19194578.1, filed August 30, 2019, said U.S. No. 62 / 853 620 Provisional Patent Application and European Patent Application No. 19194578.1 are incorporated herein by reference in their entirety. technical field [0003] The present application relates to methods for preparing water-soluble fluorescent water-treatment polymers (comprising low-water-solubility fluorescent naphthalimide monomers), fluorescent water-treatment polymers obtainable by these methods, aqueous solutions containing said polymers, their Use in a process for controlling scale in industrial water systems by treatment with a water-soluble fluorescent water treatment polymer comprising a low water-solubility fluorescent naphthalimide monomer, as an additive in anti-coagulation and anti-flocculation or in cleaning usage in the applicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64C09K11/02C09K11/06
CPCC09K11/06C09K2211/1466C08F220/06C08F230/02C08F226/06C08F222/02C08F220/585C08F220/14C08F220/1802C08F220/286C02F5/12C02F2303/14C09K11/025G01N21/6447
Inventor K·A·罗德古斯J·桑德斯K·赛托J·L·琼斯
Owner 诺力昂化学品国际有限公司
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