A kind of non-phosphorus copolymer antiscaling dispersant and preparation method thereof

Abstract

The invention relates to a non-phosphorus copolymer antiscale dispersant which is prepared by carrying out one-step polymerization on 5-15% of C16-C24 unsaturated fatty acid and 85-95% of C3-C8 unsaturated carboxylic acid in an organic solvent under the initiation action of inorganic peroxide. The invention also discloses a preparation method of the copolymer antiscale dispersant. The molecular structure of the copolymer antiscale dispersant contains carboxyl groups and long carbon chains; and thus, the copolymer antiscale dispersant has certain surface activity and stripping property on the premise of having favorable calcium carbonate scale inhibition property and dispersibility, and especially has better antiscale effect than common antiscale dispersants in a water body with higher oil content. The copolymer antiscale dispersant has the advantages of simple preparation method, low cost, low consumption and favorable antiscale and dispersion effects, is free of phosphorus, is green and environment-friendly, can be widely used in an industrial circulating cooling water system, and has higher economic benefit and social benefit.

Description

Technical field [0001] The invention relates to the field of circulating cooling water treatment, and more particularly to a phosphorus-free copolymer scale inhibitor and dispersant and a preparation method thereof. Background technique [0002] With the scale of industrial production and the rapid increase in population, water resources are severely scarce. The amount of circulating cooling water accounts for 60~70% of industrial water consumption, and reasonable saving of circulating cooling water is the most direct way to reduce industrial water consumption. The main method of saving circulating cooling water is to increase the circulating utilization rate of circulating cooling water, which not only increases the concentration ratio, but it will also cause serious corrosion and scaling problems to the circulating water system, which puts forward a higher level of water treatment technology. Claim. In order to ensure the normal operation of the circulating water system under...

AI Technical Summary

Problems solved by technology

[0004] There are many patents on polycarboxylate scale inhibitors and dispersants at home and abroad, such as CN01123146 "low molecular weight (meth) acrylic acid (salt) polymer and its preparation method and use", CN94194415.8 "unsaturated carboxylic acid copolymer And its preparation method and application", etc., but with the continuous development of industrial circulating cooling water treatment process, the complexity and variability of the circulating water system are gradually deepening, and higher requirements are put forward for the adaptability of water treatment chemicals

In particular, the frequent occurrence of material leakage makes oily substances enter the circulating water. The COD, turbidity, oil content, suspended solids and other indicators of the circulating water are high. The commonly used corrosion and scale inhibitors are difficult to play a normal role and can only Increasing the amount of corrosion and scale inhibitors, or frequent sewage replacement, greatly increases the cost of circulating water treatment, and also increases the complexity of circulating water treatment

In addition, most of the scale inhibitors and dispersants that have been published and applied contain phosphorus. When these scale inhibitors and dispersants enter the circulating water system, they can provide rich nutrients for bacteria and algae in the water, are easily decomposed, and will increase the size of the circulating water system. The difficulty of sterilization and algae removal affects the stable operation of the circulating water system