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Preparation method of phosphorus-free green environment-friendly scale inhibitor

A technology of green environmental protection and antiscalant, which is applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., can solve the problems of high price, achieve low cost, good product quality, energy The effect of low consumption

Inactive Publication Date: 2012-02-22
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, with the enhancement of people's awareness of environmental protection, the synthesis of new biodegradable antiscalants has gradually attracted the attention of the world, and many environmentally friendly antiscalants have been released, among which polyaspartic acid, poly Epoxy succinic acid, at present, the Chinese patent application number is 02111415.3 "preparation method of environmentally friendly scale inhibitor polyaspartic acid" application number is 200410015875.5 "preparation of biodegradable corrosion inhibitor polyaspartic acid method", application number 200610012918.3 "a polyaspartic acid copolymer and its preparation method", application number 200710173243.5 "preparation method of glycine / aspartic acid copolymer used as green scale inhibitor", etc. Particic acid scale inhibitors have good scale inhibition effect, but the price is relatively expensive, and many enterprises do not use them in order to reduce production costs.

Method used

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  • Preparation method of phosphorus-free green environment-friendly scale inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) Take 14g of maleic anhydride in a small cup, dissolve it in 20mL of water, heat it to 50°C to make it fully hydrolyzed, cool to room temperature, add 15mL of acrylic acid to make solution (I);

[0015] (2) Dissolve 10g sodium allyl sulfonate and 5g ammonium persulfate in 20mL water to form solution (II);

[0016] (3) Dissolve 35g of aconitic acid in 60mL of water, the temperature rises to 50°C, and solution (I) is added dropwise under stirring, after the dropwise addition is completed, the temperature is raised to 80°C for 30min at a constant temperature, then the temperature is increased to 80°C. Add solution (II) dropwise, and react at a constant temperature of 80°C for 3 hours after all the addition is completed, stop the reaction, add 50% NaOH solution dropwise to the product at about 50°C, adjust the pH to weak alkaline, and obtain a reddish-brown transparent Liquid, that is, quaternary phosphorus-free green environmental protection scale inhibitor.

Embodiment 2

[0018] (1) Take 20g of maleic anhydride in a beaker, dissolve in 25mL of water, heat to 55°C to make it fully hydrolyzed, cool to room temperature, add 15mL of acrylic acid to form solution (I);

[0019] (2) Dissolve 16g sodium allyl sulfonate and 7g ammonium persulfate in 25mL water to form solution (II);

[0020] (3) Dissolve 40g of aconitic acid in 50mL of water, and the temperature rises to 60°C, and solution (I) is added dropwise under stirring. After the dropwise addition is completed, the temperature is raised to 85°C for constant temperature reaction for 30min, and then the temperature is increased to 85°C. Add solution (II) dropwise, after all the addition is completed, react at a constant temperature of 85°C for 3 hours, stop the reaction, add 50% NaOH solution dropwise to the product at about 50°C, adjust the pH to weak alkaline, and obtain a reddish-brown transparent Liquid, that is, quaternary phosphorus-free green environmental protection scale inhibitor.

Embodiment 3

[0022] (1) Take 18g of maleic anhydride and place it in a beaker, dissolve it in 20mL of water, heat it to 60°C to make it fully hydrolyzed, cool to room temperature, add 15mL of acrylic acid to make solution (I);

[0023] (2) Dissolve 10g sodium allyl sulfonate and 5g ammonium persulfate in 20mL water to form solution (II);

[0024] (3) Dissolve 45g of aconitic acid in 60mL of water, the temperature rises to 60°C, and solution (I) is added dropwise under stirring, after the dropwise addition is completed, the temperature is raised to 75°C for constant temperature reaction for 30min, and then the temperature is increased to 75°C. Add solution (II) dropwise, after all the addition is completed, react at a constant temperature of 75°C for 4 hours, stop the reaction, add 50% NaOH solution dropwise to the product at about 50°C, adjust the pH to weak alkaline, and obtain a reddish-brown transparent Liquid, that is, quaternary phosphorus-free green environmental protection scale inh...

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Abstract

The invention discloses a preparation method of a phosphorus-free green environment-friendly scale inhibitor. The scale inhibitor is characterized by being a quarternary polymerization one and comprising components by weight of 25-40 parts of acomitic acid, 8-20 parts of acrylic acid, 12-18 parts of maleic anhydride, 6-12 parts of sodium alkyl sulfonate, 3-7 parts o fammonium persulfate and 130-220 parts of water. The invention also discloses a preparation method of the phosphorus-free green environment-friendly scale inhibitor. The scale inhibitor prepared by the invention has excellent scale inhibiting effects on scales of calcium carbonate, calcium phosphate and barium sulfate, and characteristics of rust inhibition, high temperature resistance, stable molecular weight and on phosphorus. The whole production process has no ''three wastes (waste gas, waste water and industrial residue)'' discharge. The product of the invention can be used for treating industrial circulating water and oil field water with a simple technology, and has small usage amount, low costs, good effect and good economic benefits and wide social benefits.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to a preparation method of a novel polymer corrosion and scale inhibitor. The scale inhibitor is a phosphorus-free low-molecular copolymer and belongs to an environment-friendly green scale inhibitor. Background technique [0002] With the scale of industrial production and the rapid increase of population, water resources are seriously scarce. Since cooling water consumption accounts for 60-70% of industrial water consumption, it is particularly important to save cooling water reasonably. The main way to save cooling water is to increase the recycling rate of cooling water and increase the concentration of cooling water, but this will bring serious corrosion and scaling problems to the cooling water system, and also put forward higher requirements for scale inhibitors. requirements. [0003] As a kind of water treatment agent, antiscalant is widely used in circulating cool...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/02C08F220/06C08F222/06C08F228/02C02F5/10
Inventor 李慧芝庄海燕许崇娟卢燕
Owner UNIV OF JINAN
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