Method for preparing phosphine poly-maleic anhydride water scale inhibitor

A technology of polymaleic anhydride and maleic anhydride, which is applied in the field of preparation of phosphine-based polymaleic anhydride water scale inhibitors, can solve the problems of low scale inhibition efficiency and large dosage, and achieve good scale inhibition effect, The effect of small dosage, increasing chelation and dispersibility

Inactive Publication Date: 2012-01-04
CHENGDU YULONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a preparation method of a phosphine-based polymaleic anhydride water scale inhibitor to solve the problems of large dosage and low scale inhibition efficiency of the existing hydrolyzed polymaleic anhydride

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of preparation method of phosphine-based polymaleic anhydride water scale inhibitor, realizes by following steps:

[0027] (1) Add 50g maleic anhydride, 20g sodium hypophosphite and 10mg catalyst ferrous sulfate in a four-necked flask equipped with thermometer, stirrer, reflux condenser, dropping funnel, then add 50g water.

[0028] (2) Add 40g of hydrogen peroxide solution, 4g of ammonium persulfate and 25g of water into the dropping tank (ie dropping funnel), dissolve and mix well.

[0029] (3) Put the flask in a water bath, heat up to about 35°C, turn on the agitator to dissolve and mix the materials, continue to heat up to 85°C, start adding the mixed solution in the dropping funnel, and adjust the temperature of the water bath at 90°C to 95°C ℃ range, the entire dropping time is controlled within 2h ~ 3h. After the dropwise addition, adjust the temperature of the water bath in the range of 95°C to 100°C, and react at a constant temperature for 1.5h to 2.5h ...

Embodiment 2

[0031] A kind of preparation method of phosphine-based polymaleic anhydride water scale inhibitor, realizes by following steps:

[0032] (1) Add 50g maleic anhydride, 20g potassium hypophosphite and 10mg catalyst copper sulfate in a four-necked flask equipped with thermometer, stirrer, reflux condenser, dropping funnel, then add 50g water.

[0033] (2) Add 40g of hydrogen peroxide solution, 4g of sodium persulfate and 25g of water into the dropping tank (i.e. dropping funnel), dissolve and mix well.

[0034] (3) Put the flask in a water bath, heat up to about 35°C, turn on the agitator to dissolve and mix the materials, continue to heat up to 85°C, start adding the mixed solution in the dropping funnel, and adjust the temperature of the water bath at 90°C to 95°C ℃ range, the entire dropping time is controlled within 2h ~ 3h. After the dropwise addition is completed, adjust the temperature of the water bath in the range of 95°C to 100°C, and react at a constant temperature fo...

Embodiment 3

[0036] A kind of preparation method of phosphine-based polymaleic anhydride water scale inhibitor, realizes by following steps:

[0037] (1) Add 50g maleic anhydride, 20g hypophosphorous acid and 10mg catalyst sodium metabisulfite in a four-necked flask equipped with thermometer, stirrer, reflux condenser, dropping funnel, then add 50g water.

[0038] (2) Add 40g of hydrogen peroxide solution, 4g of potassium persulfate and 25g of water into the dropping tank (i.e. dropping funnel), dissolve and mix well.

[0039] (3) Put the flask in a water bath, heat up to about 35°C, turn on the agitator to dissolve and mix the materials, continue to heat up to 85°C, start adding the mixed solution in the dropping funnel, and adjust the temperature of the water bath at 90°C to 95°C ℃ range, the entire dropping time is controlled within 2h ~ 3h. After the dropwise addition, adjust the temperature of the water bath in the range of 95°C to 100°C, and react at a constant temperature for 1.5h ...

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PUM

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Abstract

The invention discloses a method for preparing a phosphine poly-maleic anhydride water scale inhibitor. The method comprises the following steps of: (1) adding maleic anhydride, hypophosphite compound and a catalyst into a reaction vessel which is provided with a thermometer, a stirrer and a reflux condenser, wherein the dosage of the catalyst accounts for 0.004 to 0.02 percent of the total mass of materials; adding water, dissolving the maleic anhydride and the hypophosphite compound in water under a gradually heating condition, starting the stirrer to uniformly mix; (2) adding oxidant and water into a dripping tank, and uniformly mixing, wherein the mass ratio of the maleic anhydride to the hypophosphite compound to the oxidant is 0.5-1.8:0.2-0.6:0.5-1.5; and (3) slowly dripping the oxidant solution in the dripping tank into the reactor, controlling the reaction temperature to be between 60 and 120 DEG C and the reaction time to be between 0.5 and 10h, and cooling and packaging after the reaction is completed.

Description

technical field [0001] The invention relates to the technical field of industrial circulating cooling water treatment, in particular to a preparation method of a phosphine-based polymaleic anhydride water scale inhibitor. Background technique [0002] With the development of modern industry, the water consumption in the industrial production process is increasing day by day, and higher requirements are put forward for the chemical treatment agents of industrial circulating cooling water. The preparation of water treatment chemicals with high antiscalant effect suitable for a wide range of water quality and the research on their mechanism of action have become the main content of water treatment chemicals research. [0003] In the prior art, the application research of maleic anhydride series polymer scale inhibitors is quite active and has made great progress, such as Ye Tianxu, Li Fang, etc. "Research on the Latest Synthesis Technology of Hydrolyzed Polymaleic Anhydride" (A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F122/06C08F8/40C02F5/14
Inventor 何洪波柳堤苏士勇
Owner CHENGDU YULONG CHEM
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