Environment-friendly polyether multifunctional water treatment agent and preparation method thereof

Abstract

An environment-friendly polyether multifunctional water treatment agent and a preparation method thereof relate to a phosphorus-free, nitrogen-free and biodegradable environment-friendly polyether multifunctional water treatment agent (APEY) and a preparation method thereof. The water treatment agent is applicable to circulating cooling water systems, and particularly applicable to high-calcium cooling water quality; in the general structural formula of the water treatment agent, A is a vinyl-containing unsaturated double-bond monomer-copolymerized repeating structural unit, the degree of polymerization x is 2 to 5000, the degree of polymerization y is 2 to 5000, the degree of polymerization n is 2 to 5000, the degree of polymerization z is 2 to 5000, and the repeating unit m is 1 to 100.

Description

Technical field [0001] The present invention involves a green environmentally friendly polyether multifunctional water treatment agent and its preparation method that is phosphorus -free, nitrogen -free and biodegradable. It is a water treatment agent preparation and application category. It is suitable for circulating cooling water system.Calcium cooling water quality. Background technique [0002] With the increasing importance to human beings to the living environment and the increasingly strict environmental protection regulations, green environmental protection water treatment agents have become increasingly valued by people.The problem of environmental pollution such as breeding and the rich nutritionalization of water bodies is imperative to develop green water treatment agents without phosphorus non -nitrogen. [0003] At present, the water treatment agents with more research and good dirt are mostly phosphates, such as hydroxyl ateromyl (HEDP), amino triameter acid (AMP)...

AI Technical Summary

Problems solved by technology

[0002]As human beings pay more and more attention to the living environment and environmental protection laws and regulations become increasingly strict, people pay more and more attention to green and environment-friendly water treatment agents. The widespread use of nitrogen scale inhibitors has caused environmental pollution problems such as the proliferation of bacteria and algae, eutrophication of water bodies, etc. Therefore, it is imperative to develop green water treatment agents without phosphorus and nitrogen

[0003] At present, most of the water treatment agents with better scale inhibition effect are phosphates, such as hydroxyethylidene diphosphonic acid (HEDP), aminotrimethylene Phosphonic acid (AMP) and 2-phosphonic acid butane-1,2,4-tricarboxylic acid (PBTC), etc., although these water treatment agents have excellent performance in inhibiting calcium carbonate deposition and good corrosion inhibition performance, but Phosphorus can act as a nutrient for bacteria and algae in water, which can easily cause eutrophication of water sources and cause water pollution; secondly, HEDP, PBTC, etc. have relatively small molecular weights (< 600) and fewer functional groups. The inhibition and dispersion of calcium scale and iron oxide particles are poor, and the stability to zinc salts is poor. In the water quality containing high calcium and high iron, it is easy to form organic calcium phosphate and organic iron phosphate that are insoluble in water, which affects its performance. application

Another type of water treatment agent that has been studied more is phosphorus-free carboxylic acid water treatment agent, such as polyacrylic acid (PAA), polyepoxysuccinic acid (PESA), etc., although US patents 5,062,962 and 5,147,555 show that PESA is effective on CaCO 3 and CaSO4 have good scale inhibition effect, but the effect of calcium phosphate inhibition is poor, and the ability to disperse iron is poor. In addition, the corrosion inhibition performance of this kind of water treatment agent generally

American Betz company launched a new generation of sulfonate copolymer AA–APES (acrylic acid–allyloxypolyethoxysulfate copolymer) in 2003, which prevents Ca3(PO4)2 The efficiency is significantly improved, and AA–APES has a higher tolerance to water hardness, suspended solids, and temperature. It is the latest generation of Ca3( PO4)2 scale phosphorus-free water treatment agent, but APES still contains nitrogen elements that cause eutrophication of water sources and the effect of inhibiting calcium sulfate scale is poor

Chinese patent CN101003410A discloses a phosphorus-free allyloxy polyether scale inhibitor and its preparation method. However, a large amount of difficult-to-handle inorganic waste salt will be produced during the preparation process of the scale inhibitor, which will easily cause secondary pollution and increase its Industrial application cost

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