CN102701471A - High-harness water corrosion and scale inhibitor - Google Patents

Abstract

The invention relates to a high-harness water corrosion and scale inhibitor, which comprises the following components by mass percent: 10-20 percent of amino trimethylene phosphonic acid, 20-30 percent of hydroxyethylidenediphosphonic acid, 20-30 percent of 2-phosphonobutane-1, 2, 4-tricarboxylic acid, 20-50 percent of terpolymer and 0-30 percent of reverse osmosis water. The high-harness water corrosion and scale inhibitor provided by the invention can realize the goal that calcium hardness and alkalinity in circulating water reach high concentration ratio of 1500mg/L.

Description

A Corrosion and Scale Inhibitor for High Hard Water

technical field

The invention belongs to the technical field of industrial circulating cooling water treatment, and in particular relates to a corrosion and scale inhibitor for high-hard water.

Background technique

High water consumption and low reuse rate are major disadvantages of water resources utilization in industrial systems, especially for my country, a country with a lack of per capita water resources, where the shortage of water resources will seriously restrict economic development. As we all know, adding scale and corrosion inhibitors to the cooling water system to control the scaling and corrosion of the water system, to achieve the recycling of circulating water, and to increase the concentration of circulating water is one of the main methods of saving water in the industrial field. In the operation and management of industrial circulating water systems, the concentration ratio is an important technical index to determine the recycling rate of cooling water, and the realization of high concentration ratio operation is the development direction of circulating cooling water treatment. At present, most of the water treatment chemicals used at home and abroad are organic phosphine series chemicals. Under normal circumstances, this series of agents can increase the concentration ratio of circulating water by 2-3, and the higher one is no more than 4, resulting in a large waste of water resources. In recent years, with the development of high-performance water treatment chemicals, the development of high concentration multiple cooling water treatment technology has become a hot spot for enterprises. In view of the shortage of water resources in our country, many pillar industries, industries and enterprises have urgently put forward the requirement of increasing revenue and reducing expenditure of water resources. Therefore, research and development of complete sets of technology for the operation and treatment of high concentration multiples of industrial circulating water, through the establishment of demonstration projects, in the industrial field The implementation of promotion in my country will certainly help alleviate the shortage of water supply in our country. The existing scale inhibitors generally have the problem of poor corrosion inhibition effect on carbon steel, and cannot meet the national standard requirements for carbon steel corrosion rate.

CN101125715A discloses solid and liquid sustained-release agents, liquid part organic phosphonic acid 5%, organic carboxylic acid 20%, water 55%; solid part polymer 20%, alkali agent 71%, azoles 3%, zinc salt 6%. CN101417838B discloses a scale and corrosion inhibitor, PBTCA 15%, HEDP 8%, zinc sulfate heptahydrate 12%, BTA 1.5%, sodium hexametaphosphate 3%, concentrated sulfuric acid 2%, AA/AMPS 30%, and the rest is water.

The purpose of this invention is to solve the scaling problem of circulating water in the state of high hardness and high alkali. This product is mainly composed of various organic phosphine carboxylic acids, polycarboxylic acids, sulfonate-containing copolymers, corrosion inhibitors, special surfactants, etc. , suitable for circulating cooling water systems that require a high concentration rate of 1500 mg/L for calcium hardness and alkalinity in circulating water.

Contents of the invention

The invention provides a corrosion and scale inhibitor for high-hard water, including aminotrimethylene phosphonic acid, hydroxyethylidene diphosphonic acid, 2-phosphonic acid butane-1,2,4-tricarboxylic acid, terpolymer, trans Penetrating water. Wherein, the weight percent of each component is as follows:

Amino trimethylene phosphonic acid: 10% to 20%;

Hydroxyethylene diphosphonic acid: 20% to 30%;

2-phosphonic acid butane-1,2,4-tricarboxylic acid: 20%~30%;

Terpolymer: 20% to 50%;

Reverse osmosis water: 0% to 30%.

The active components of the above-mentioned aminotrimethylene phosphonic acid and hydroxyethylene diphosphonic acid are 60%, and the terpolymer refers to the copolymerization of acrylic acid-acrylic acid ester-sulfonate, with a solid content of 30%; 2- The active ingredient of phosphonobutane-1,2,4-tricarboxylic acid is 50%.

The physical index of a kind of high-hard water corrosion and scale inhibitor of the present invention is as follows:

Appearance: light yellow transparent liquid;

Density: (20°C) ≥ 1.20 g/cm ³ ;

Solid content: ≥45.0%;

pH (1% aqueous solution): 2.0±1.0.

Compared with the prior art, the positive effect of the present invention is: adopting the highly hard water corrosion and scale inhibitor of the present invention can realize the high concentration ratio of calcium hardness and alkalinity in circulating cooling water reaching 1500 mg/L.

Detailed ways

Specific embodiments of the present invention are provided below.

Example 1

A corrosion and scale inhibitor for high-hard water, formulated according to the following mass percentages:

Amino trimethylene phosphonic acid: 20%;

Hydroxyethylene diphosphonic acid: 25%;

2-phosphonobutane-1,2,4-tricarboxylic acid: 25%;

Terpolymer: 20%;

Reverse osmosis water: 10%.

The active components of the above-mentioned aminotrimethylene phosphonic acid and hydroxyethylene diphosphonic acid are 60%, and the terpolymer refers to the copolymerization of acrylic acid-acrylic acid ester-sulfonate, with a solid content of 30%; 2- The active ingredient of phosphonobutane-1,2,4-tricarboxylic acid is 50%.

Embodiment 2 (best embodiment)

A corrosion and scale inhibitor for high-hard water, formulated according to the following mass percentages:

Amino trimethylene phosphonic acid: 16%;

Hydroxyethylene diphosphonic acid: 25%;

2-phosphonobutane-1,2,4-tricarboxylic acid: 25%;

Terpolymer: 34%.

The active components of the above-mentioned aminotrimethylene phosphonic acid and hydroxyethylene diphosphonic acid are 60%, and the terpolymer refers to the copolymerization of acrylic acid-acrylic acid ester-sulfonate, with a solid content of 30%; 2- The active ingredient of phosphonobutane-1,2,4-tricarboxylic acid is 50%.

Example 3

A corrosion and scale inhibitor for high-hard water, formulated according to the following mass percentages:

Amino trimethylene phosphonic acid: 18%;

Hydroxyethylene diphosphonic acid: 23%;

2-phosphonobutane-1,2,4-tricarboxylic acid: 23%;

Terpolymer: 36%.

The active components of the above-mentioned aminotrimethylene phosphonic acid and hydroxyethylene diphosphonic acid are 60%, and the terpolymer refers to the copolymerization of acrylic acid-acrylic acid ester-sulfonate, with a solid content of 30%; 2- The active ingredient of phosphonobutane-1,2,4-tricarboxylic acid is 50%.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be considered Within the protection scope of the present invention.

Claims (3)

1. high hardness corrosion inhibiting and descaling agent is characterized in that: it is by ATMP, HEDP, 2-phosphonic acids butane-1,2, and 4-tricarboxylic acid, terpolymer are formed, and each constituent mass per-cent is:

ATMP 10 ~ 20%;

Hydroxy ethylene diphosphonic acid 20 ~ 30%;

2-phosphonic acids butane-1,2,4-tricarboxylic acid 20 ~ 30%;

Terpolymer 20 ~ 50%;

Reverse osmosis water 0 ~ 30%.

2. according to claims 1 described a kind of high hardness corrosion inhibiting and descaling agent; It is characterized in that: the active constituent of ATMP, hydroxy ethylene diphosphonic acid is 60%; Terpolymer is meant by vinylformic acid-propenoate-sulphonate copolymerization and forms, solid content 30%; 2-phosphonic acids butane-1,2, the tricarboxylic active ingredient of 4-is 50%.

3. according to claims 2 described a kind of high hardness corrosion inhibiting and descaling agents, it is characterized in that: its each constituent mass per-cent is:

ATMP: 16%;

Hydroxy ethylene diphosphonic acid: 25%;

2-phosphonic acids butane-1,2,4-tricarboxylic acid: 25%;

Vinylformic acid-propenoate-sulphonate terpolymer: 34%.