Sea water desalination scale inhibitor and preparation method thereof

A scale inhibitor and raw material technology, applied in the field of seawater desalination treatment scale inhibitor and its preparation, can solve the problems of low scale inhibition rate, low biodegradation rate and high phosphorus content of scale inhibitors, and achieve good scale inhibition performance, Good biodegradability and good water solubility

Inactive Publication Date: 2017-02-15
JIANGSU JINGWEI TECH INNOVATION CONSULTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The invention provides a scale inhibitor for seawater desalination treatment and a preparation method thereof, which solves technical problems such as low scale inhibition rate, poor compatibility, low biodegradation rate and high phosphorus content rate of existing scale inhibitors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The first step: weighing according to the ratio of parts by mass: 100 parts of high-purity water; 10 parts of polyamino polyether group methylene phosphonic acid; 8 parts of hydroxymethylene ammonium phosphate; 6 parts of sodium ethylenediamine tetramethylene phosphonate 15 parts of polyaspartic acid; 10 parts of hydrolyzed polymaleic anhydride; 20 parts of butyl acrylate; 4 parts of polyacrylic acid; 1 part of octyl acrylate; 13 parts of acid sodium salt; 5 parts of isothiazolinone.

[0026] Step 2: Put high-purity water, polyaspartic acid, butyl acrylate and ammonium hydroxymethylene phosphate into a reaction kettle equipped with a thermometer, heating device and stirring device, raise the temperature to 50°C, stir for 20 minutes, and the stirring speed is 80 rpm / minute.

[0027] Step 3: heat up to 60°C, add isothiazolinone and remaining raw materials, and stir for 2 hours.

[0028] Wide range of sources of raw materials, good water solubility, suitable for seawate...

Embodiment 2

[0030] The first step: weighing according to the ratio of parts by mass: 100 parts of high-purity water; 30 parts of polyamino polyether group methylene phosphonic acid; 12 parts of hydroxymethylene ammonium phosphate; 10 parts of sodium ethylenediamine tetramethylene phosphonate 35 parts of polyaspartic acid; 30 parts of hydrolyzed polymaleic anhydride; 40 parts of butyl acrylate; 8 parts of polyacrylic acid; 20 parts of octyl acrylate; 17 parts of acid sodium salt; 9 parts of isothiazolinone.

[0031] Step 2: Put high-purity water, polyaspartic acid, butyl acrylate and ammonium hydroxymethylene phosphate into a reaction kettle equipped with a thermometer, heating device and stirring device, raise the temperature to 70°C, stir for 40 minutes, and the stirring speed is 120 rpm / minute.

[0032] Step 3: heat up to 80°C, add isothiazolinone and remaining raw materials, and stir for 4 hours.

[0033]Wide range of sources of raw materials, good water solubility, suitable for sea...

Embodiment 3

[0035] The first step: weighing according to the ratio of parts by mass: 100 parts of high-purity water; 15 parts of polyamino polyether group methylene phosphonic acid; 9 parts of ammonium hydroxymethylene phosphate; 7 parts of sodium ethylenediamine tetramethylene phosphonate 20 parts of polyaspartic acid; 15 parts of hydrolyzed polymaleic anhydride; 25 parts of butyl acrylate; 5 parts of polyacrylic acid; 5 parts of octyl acrylate; 14 parts of acid sodium salt; 6 parts of isothiazolinone.

[0036] Step 2: Put high-purity water, polyaspartic acid, butyl acrylate and ammonium hydroxymethylene phosphate into a reaction kettle equipped with a thermometer, heating device and stirring device, raise the temperature to 50°C, stir for 20 minutes, and the stirring speed is 80 rpm / minute.

[0037] Step 3: heat up to 60°C, add isothiazolinone and remaining raw materials, and stir for 2 hours.

[0038] Wide range of sources of raw materials, good water solubility, suitable for seawat...

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Abstract

A sea water desalination scale inhibitor is prepared from high-purity water, polyamino polyether methylene phosphonic acid, hydroxyl methylene ammonium phosphate, ethylenediamine tetramethylene sodium phosphate, polyaspartic acid, hydrolytic polymaleic anhydride, butyl acrylate, polyacrylic acid, n-octyl acrylate, 2- phosphonobutane-1,2,4-tricarboxylic acid sodium salt and isothiazolinone. Calcium chelating ability is 240-260mg/g, the content of phosphorus in discharged water is 0.08-0.12mg/L, and a cleaning period of sea water desalination membranes is prolonged from 6 months to 8-10 months. Addition amount of the sea water desalination scale inhibitor in per liter of seawater is 2-6mg, the sea water desalination scale inhibitor is used for water high in alkalinity, hardness, pH value and concentration, synergistic effects of components are achieved, and the sea water desalination scale inhibitor is 0.0015-0.0035micron.a<-1> in carbon steel corrosion rate and 95.5-99.5% in calcium carbonate scale inhibition rate and makes seawater to replace fresh water to serve as industrial recycling cooling water.

Description

technical field [0001] The invention relates to an environment-friendly material, in particular to a scale inhibitor for seawater desalination treatment and a preparation method thereof. Background technique [0002] Scale inhibitor: It is a class of agents that can disperse insoluble inorganic salts in water, prevent or interfere with the precipitation and scaling of insoluble inorganic salts on metal surfaces, and maintain good heat transfer effects on metal equipment . [0003] From the perspective of the mechanism of action, the role of scale inhibitors can be divided into three parts: chelation, dispersion and lattice distortion. And in the laboratory evaluation test, the dispersion effect is the remedial measure of the chelation effect, and the lattice distortion effect is the remedial measure of the dispersion effect. [0004] The anti-corrosion and anti-scaling agent for cold-changing equipment is formulated with epoxy resin and specific amino resin as the base mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14C02F5/12C02F5/10C02F103/08
CPCC02F5/14C02F5/10C02F5/12C02F2101/20C02F2103/08C02F2303/14
Inventor 王静
Owner JIANGSU JINGWEI TECH INNOVATION CONSULTING CO LTD
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