Green environment-friendly polyether carboxylic acid ester corrosion inhibition and scale inhibitor and preparation method thereof

Abstract

The invention relates to a green environment-friendly polyether carboxylic acid ester corrosion inhibition and scale inhibitor (APEL) and preparation method thereof. The corrosion and scale inhibitor is a phosphorus-free, nitrogen-free and biodegradable water treatment agent, which is applicable to industrial recirculated cooling water and is used for water quality corrosion inhibition and scale inhibition treatment. The corrosion inhibition scale inhibitor of the present invention is obtained by free radical copolymerization of polyether carboxylic acid ester reactive monomers and vinyl unsaturated double bond monomers, which comprise the following structural general formula: wherein A is monomer copolymerized constitutional repeating unit containing vinyl unsaturated double bond; R is Hor C1 to C5 low carbon alkyl; the degree of polymerization of x is 1 to 5000; the degree of polymerization of y is 1 to 5000; repeating unit amount of m is 1 to 100. The carboxylic acid ester corrosion inhibition and scale inhibitor has good compatibleness, can be used alone or in combination with other water treatment agents, like organic phosphate, zinc salt corrosion inhibitor.

Description

technical field The invention relates to a green and environment-friendly polyether carboxylate corrosion and scale inhibitor (APEL) and a preparation method thereof, which is a phosphorus-free, nitrogen-free and biodegradable water treatment agent suitable for industrial circulating cooling water systems The invention is used for corrosion and scale inhibition treatment of water quality, and belongs to the preparation technology of corrosion and scale inhibitors in the technical field of water treatment. Background technique In the circulating cooling water system in industrial production, due to the evaporation of water, the change of pH value, the rise of temperature, the change of water flow rate, the impurities in water, the pressure of the system and other factors during use, the alkaline earth metal cations contained in the water, such as Ca 2+ , Mg 2+ 、Ba 2+ and small amounts of other cations such as Fe 2+ , Fe 3+ 、Cu 2+ 、Al 3+ , Zn 2+ etc., will react wi...

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Problems solved by technology

Chinese patent CN101172720 discloses a phosphorus-free allyloxypolyether carboxylic acid scale inhibitor and its preparation method, but the scale inhibitor preparation process will produce a large amount of inorganic waste salt that is difficult to handle, which will easily cause secondary pollution and increase the cost of its industrial application

However, since the molecular structure of polyepoxysuccinic acid is mainly carboxyl functional groups, a single functional group limits its ability to disperse iron, and the effect of inhibiting calcium phosphate is very poor. When used in combination with organic phosphine corrosion and scale inhibitors, Increases the risk of calcium phosphate scale deposition; in addition, the corrosion inhibition performance of this type of scale inhibitor is average

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