Polyaspartic acid for water treatment scale inhibitor, as well as preparation method and application of polyaspartic acid

A technology of polyaspartic acid and scale inhibitor, which is applied in water/sludge/sewage treatment, special treatment targets, chemical instruments and methods, etc., can solve the problems of lack of structure and performance, and achieve high degree of freedom and good The effect of scale inhibition performance and fast biodegradation performance

Active Publication Date: 2016-10-12
山东玉泉食品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, there is a lack ...

Method used

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  • Polyaspartic acid for water treatment scale inhibitor, as well as preparation method and application of polyaspartic acid
  • Polyaspartic acid for water treatment scale inhibitor, as well as preparation method and application of polyaspartic acid
  • Polyaspartic acid for water treatment scale inhibitor, as well as preparation method and application of polyaspartic acid

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0019] Preparation of polysuccinimide

[0020] A certain amount of 1000g L-aspartic acid and 13g H 3 PO 4 Add it to liquid paraffin, heat to 200°C and react for 2 hours, separate the water produced by the reaction with a water separator, cool down to 35°C, and separate the liquid paraffin by suction filtration, wash the solid product three times with ethanol and distilled water respectively, and place at 80°C Dry in a constant temperature drying oven for 10 hours to obtain a light yellow polysuccinimide powder. After testing, the mass average molecular weight of the polysuccinimide is 6810, and it is ready for use.

preparation example 2

[0022] Preparation of polysuccinimide

[0023] A certain amount of 1000g L-aspartic acid and 15g H 3 PO 4 Add it to liquid paraffin, heat to 200°C and react for 2.5 hours, separate the water produced by the reaction with a water separator, cool down to 35°C, and separate the liquid paraffin by suction filtration, wash the solid product with ethanol and distilled water three times respectively, and place at 80°C Dry in a constant temperature drying oven for 10 hours to obtain light brown polysuccinimide powder. After testing, the mass average molecular weight of polysuccinimide is 7530, and it is ready for use.

preparation example 3

[0025] Preparation of polysuccinimide

[0026] A certain amount of 1000g L-aspartic acid and 10g H 3 PO 4 Add it to liquid paraffin, heat to 190°C and react for 3 hours, separate the water produced by the reaction with a water separator, cool down to 35°C, and separate the liquid paraffin by suction filtration, wash the solid product with ethanol and distilled water three times respectively, and place at 80°C Dry it in a constant temperature drying oven for 10 hours to obtain light yellow polysuccinimide powder. After testing, the mass average molecular weight of polysuccinimide is 7460, and it is ready for use.

[0027] In the present invention, the test of molecular weight adopts gel chromatography to carry out on Waters510 gel chromatograph, specifically: adopt differential refraction detector, polystyrene is used as standard sample, and chromatographic column adopts PlgelMIXED-B 300 * 7.5, 10 μ m, The temperature is 35°C.

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PUM

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Abstract

The invention discloses polyaspartic acid for a water treatment scale inhibitor. The structural formula of the polyaspartic acid is shown in formula I of the description, where x/(x+y) is more than or equal to 0.50 and less than or equal to 0.8. The preparation method for the polyaspartic acid comprises the following steps: performing contact reaction on polysuccinimide and a mixed base in the presence of triethanolamine and zinc acetate, and regulating the pH of a solution to 6 to 7 by virtue of hydrochloric acid, wherein the mixed base is prepared from potassium hydroxide and tetramethyl guanidine of which the mass ratio is (1 to 3):1. The polyaspartic acid is higher in scale inhibition performance and biological degradation performance and more environmentally-friendly.

Description

technical field [0001] The invention relates to a polyaspartic acid used as a scale inhibitor for water treatment, a preparation method and application thereof. Background technique [0002] At present, the green and high efficiency of water treatment antiscalant products has become the development direction of antiscalant products. At present, organic phosphoric acid, organic polyphosphonic acid and their salts are the most widely used scale inhibitors, such as ATMP, HEDP, PBTCA, etc. However, organophosphorus scale inhibitors are likely to cause eutrophication of water bodies and cause water pollution. Polyaspartic acid (Polyaspartic acid) is a polyamino acid with a carboxylic acid side chain, which is a class of biodegradable and environmentally friendly green chemicals with good scale inhibition and dispersion properties and good biodegradability sex. The synthesis and application of polyaspartic acid have also attracted much attention today when environmental problem...

Claims

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Application Information

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IPC IPC(8): C02F5/12
CPCC02F5/12C02F2303/22
Inventor 陈令浩
Owner 山东玉泉食品有限公司
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