Preparation method of polyaspartic acid scale inhibitor

A technology of polyaspartic acid and scale inhibitor, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., can solve the problems of poor chelating and dispersing ability, application limitation, etc. , to achieve the effect of high scale inhibition rate

Inactive Publication Date: 2014-01-22
SHAANXI SHENGMAI PETROLEUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its chelating and dispersing ability is not as good as that of acrylic acid and maleic acid polymers widely used at prese

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Mix 1 mole of maleic anhydride and 2 moles of distilled water, stir in a 55°C water bath, dissolve completely and cool to room temperature;

[0012] Slowly add ammonia water dropwise to the solution, keeping the solution temperature not exceeding 25°C; after the dropwise addition is completed. Raise the temperature to 80°C, react at constant temperature for 6 h, and then cool to room temperature to obtain a colorless transparent glassy liquid;

[0013] Dry the liquid at 100-110°C to obtain a white solid powder;

[0014] Heat the white solid powder in an oil bath at 240°C for 3 hours, then cool to obtain a reddish-brown brittle solid, which is added to a sodium hydroxide solution with a mass fraction of 10%, and the pH is adjusted to 9 to obtain polyaspartic acid scale inhibitor agent solution.

[0015] According to the GB / T 16632-1996 standard "Determination of Scale Inhibition Performance of Water Treatment Agents by Calcium Carbonate Deposition Method", the scale in...

Embodiment 2

[0018] Mix 2 moles of maleic anhydride and 5 moles of distilled water, stir in a 55°C water bath, dissolve completely and cool to room temperature;

[0019] Slowly add ammonia water dropwise to the solution, keeping the solution temperature not exceeding 25°C; after the dropwise addition is completed. Raise the temperature to 80°C, react at constant temperature for 6 h, and then cool to room temperature to obtain a colorless transparent glassy liquid;

[0020] Dry the liquid at 100-110°C to obtain a white solid powder;

[0021] Heat the white solid powder in an oil bath at 220°C for 4 hours, then cool to obtain a reddish-brown brittle solid, add it to a 10% sodium hydroxide solution, adjust the pH to 9, and obtain polyaspartic acid scale inhibitor agent solution.

[0022] According to the GB / T 16632-1996 standard "Calcium Carbonate Deposition Method for Determination of Scale Inhibition Performance of Water Treatment Agents", the scale inhibition rate of polyaspartic acid sc...

Embodiment 3

[0025] Mix 2 moles of maleic anhydride and 5 moles of distilled water, stir in a 55°C water bath, dissolve completely and cool to room temperature;

[0026] Slowly add ammonia water dropwise to the solution, keeping the solution temperature not exceeding 25°C; after the dropwise addition is completed. Raise the temperature to 80°C, react at constant temperature for 6 h, and then cool to room temperature to obtain a colorless transparent glassy liquid;

[0027] Dry the liquid at 100-110°C to obtain a white solid powder;

[0028] Heat the white solid powder in an oil bath at 220°C for 7 hours, then cool to obtain a reddish-brown brittle solid, which is added to a sodium hydroxide solution with a mass fraction of 10%, and the pH is adjusted to 9 to obtain polyaspartic acid scale inhibitor agent solution.

[0029] According to the GB / T 16632-1996 standard "Calcium Carbonate Deposition Method for Determination of Scale Inhibition Performance of Water Treatment Agents", the scale ...

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PUM

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Abstract

The invention relates to a preparation method of a descaling matter. A preparation method of a polyaspartic acid scale inhibitor comprises the following steps: mixing maleic anhydride and distilled water in a molar ratio of 1:1.5-2.5, performing water bath of 55 DEG C and stirring, dissolving completely, and cooling to room temperature; slowly dropping aqua ammonia into the solution, keeping the temperature no greater than 25 DEG C; after finishing dropping of the aqua ammonia, heating up to 80 DEG C, reacting at a constant temperature for 6h, cooling to the room temperature to obtain a colorless transparent glass-like liquid; drying the liquid at 100-110 DEG C to obtain white solid powder; heating the white solid powder by oil bath of 220-260 DEG C for 3-7 h, cooling to obtain a red brown brittle solid, adding the red brown brittle solid into a sodium hydroxide solution with the mass fraction of 10%, adjusting the pH to 9 to obtain a polyaspartic acid scale inhibitor solution. The polyaspartic acid scale inhibitor has a high scale inhibiting ratio, and is suitable for low-mineralization-degree industrial circulating cooling water and oilfield reinjection water.

Description

technical field [0001] The invention relates to a preparation method of a substance for descaling. Background technique [0002] Polyaspartic acid (PASP) is a water-soluble amino acid polymer. The relative molecular mass distribution is very wide, except for the properties of water-soluble polycarboxylic acid. Also because of its valuable biodegradability, non-toxic, non-polluting, and excellent characteristics of not damaging the environment, it has attracted more and more attention. However, its chelating and dispersing ability is not as good as that of acrylic acid and maleic acid polymers widely used at present, and it is not enough to replace the application of polyacrylic acid in scale inhibitors, so its application is greatly limited. Contents of the invention [0003] The invention aims to provide a preparation method of polyaspartic acid scale inhibitor with high scale inhibition rate. [0004] The preparation method of polyaspartic acid scale inhibitor o...

Claims

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Application Information

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IPC IPC(8): C08G73/10C02F5/12
Inventor 王耀斌
Owner SHAANXI SHENGMAI PETROLEUM
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