Preparation method of multielement composite scale inhibitor

A multi-component composite and antiscalant technology, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., can solve the problems of low scale inhibition rate and large performance difference, and achieve anti The effect of high scale efficiency

Inactive Publication Date: 2012-05-23
HUBEI ZHONGBI ENVIRONMENTAL PROTECTION TECHCO
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there are many kinds of reverse osmosis antiscalants in the market, and the product performance varies greatly, but most of them have the problem of low scale inhibition rate. The scale inhibition rate of existing reverse osmosis scale inhibitors is generally 60-80%.

Method used

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  • Preparation method of multielement composite scale inhibitor

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Comparison scheme
Effect test

Embodiment 1

[0018] The method embodiment 1 of the present invention, its steps are:

[0019] (1) Add 50kg of melamine, 100kg of 40% hydrolyzed maleic anhydride, 100kg of ammonium chloride, and 100kg of formaldehyde into a container with a volume of 1000L, stir and dissolve, and react for 1 hour at 80±5°C;

[0020] (2) Add 100kg of urea, 100kg of ammonium chloride, and 100kg of formaldehyde, and react for 3 hours at 90±5°C;

[0021] (3) Add 100kg of 30% polyacrylic acid and 100kg of 2% cationic polyacrylamide, and react at 70±5°C for 0.5 hours;

[0022] (4) After cooling to room temperature, the multi-component polymeric reverse osmosis scale inhibitor can be prepared.

Embodiment 2

[0023] The method embodiment 2 of the present invention, its steps are:

[0024] (1) Add 50kg of melamine, 50kg of 30% hydrolyzed maleic anhydride, 100kg of ammonium chloride, and 150kg of formaldehyde into a constant temperature reaction kettle with a volume of 1200L and a stirrer. After stirring and dissolving, react at 80±5°C for 2 hours ;

[0025] (2) Add 100kg of urea, 150kg of ammonium chloride, and 100kg of formaldehyde, and react at 90±5°C for 2 hours;

[0026] (3) Add 100kg of 15% polyacrylic acid and 100kg of 0.5% cationic polyacrylamide, and react for 1 hour at 70±5°C;

[0027] (4) After cooling to room temperature, the multi-component polymeric reverse osmosis scale inhibitor can be prepared.

Embodiment 3

[0028] Embodiment 3 of the inventive method, its steps are:

[0029] (1) Add 50kg of melamine, 50kg of 40% hydrolyzed maleic anhydride, 50kg of ammonium chloride, and 100kg of formaldehyde into a container with a volume of 1000L, stir and dissolve, and react at 80±5°C for 0.5 hours;

[0030] (2) Add 50kg of urea, 50kg of ammonium chloride, and 150kg of formaldehyde, and react at 90±5°C for 4 hours;

[0031] (3) Add 150kg of 30% polyacrylic acid and 150kg of 2% cationic polyacrylamide, and react for 1 hour at 70±5°C;

[0032] (4) After cooling to room temperature, the multi-component polymeric reverse osmosis scale inhibitor can be prepared.

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Abstract

The invention discloses a preparation method of a multielement composite scale inhibitor. The method is characterized by comprising the following steps: adding 1 part of melamine, 1-3 parts of 30-40% hydrolyzed maleic anhydride, 1-3 parts of ammonium chloride and 1-3 parts of formaldehyde into a container; stirring, dissolving and reacting at 80+ / -5 DEG C for 0.5-2 h; adding 1-3 parts of urea, 1-3 parts of ammonium chloride and 1-3 parts of formaldehyde, and reacting at 90 + / -5 DEG C for 2-4 h; adding 1-3 parts of 15-30% polyacrylic acid and 1-3 parts of 0.5-2% cation polyacrylamide, reacting at 70 + / -5 DEG C for 0.5-1 h; cooling to room temperature to obtain a finished product. The method reduces equipment investment and cost of a reverse osmosis system, and reverse osmosis scale inhibitor has high scale inhibition performance.

Description

technical field [0001] The invention relates to the technical field of industrial water supply treatment and advanced water treatment, in particular to a reverse osmosis scale inhibitor, in particular to a preparation method of a multi-component composite scale inhibitor. Background technique [0002] With the continuous expansion of urbanization in our country and the continuous deepening of the industrial level, there are certain restrictions on the use of groundwater as industrial water. Therefore, most of the boiler water in modern thermal power plants should be treated with surface water. In order to ensure the quality of boiler water, modern thermal power enterprises widely adopt reverse osmosis technology and establish thermal power plant water treatment systems. [0003] Long-term operation of reverse osmosis equipment will cause a large amount of dirt to precipitate, resulting in fouling. The appearance of fouling will directly cause a large amount of energy consum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12
Inventor 李孟张斌曹教鸿刘晓宇廖祁明刘文
Owner HUBEI ZHONGBI ENVIRONMENTAL PROTECTION TECHCO
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