KR19990018940A - Complex salt detergent composition and preparation method thereof - Google Patents

Abstract

The present invention relates to a composition for forming a crystal as a composite of silicate and phosphate to inhibit corrosion of metals and non-metals and a method for producing the same. According to the present invention, 50% by weight of silicate (purity 99.9%, 120 mesh powder), 30% by weight of anhydrous sodium-ash, 15% by weight of sodium pyrophosphate and sodium triphosphate 5% by weight of phosphate is uniformly mixed, and this mixture is melted at about 1650 ° C. to provide a detergent composition based on silicate and phosphate, which is obtained by cooling and solidifying the melt at room temperature for 12 hours. The composition according to the present invention smoothly removes scale and rust on the metal surface, and has anticorrosive and anti-corrosive action by dispersing corrosion factors, inhibiting ionization activity, and forming a strong film, which is useful for various metal pipes and piping. Can be.

Description

Complex salt detergent composition and its manufacturing method

The present invention relates to a method for producing a composite salt cleaning agent composition, and to a composition for inhibiting corrosion of metals and nonferrous metals and a method for producing the same.

In general, the surface of a metal or non-ferrous metal tube, such as circulating vessels or foldable vessels always immersed in water, the metal surface is corroded due to various corrosion factors, or the scale is stacked to block the tube, or the green water is circulated Problems arise, especially in the case of passing water through a metal pipe using tap water, and the calcium carbonate component contained in the water is deposited on the metal surface to form scale.

To prevent this, various types of anti-scaling agents and cleaning agents for metal tubes have been developed.

So far, silicate-based detergents are known as detergents for removing such scales or preventing their formation, and the main component thereof is metasodium silicate (Na ₂ Sio ₃ ).

When added to water, metasodium silicate reacts with Fe (OH ₃ ) to form FeSiO ₃ to form a film on the metal surface, and at the same time, ion-bonded with calcium carbonate molecules to prevent scaling. However, high-purity silicates are not only difficult to obtain, they are expensive, and the chemical functions of a single silicate alone are difficult to expect various functions for corrosion prevention.

On the other hand, phosphate-based metal tube cleaning agent is mainly used to remove metal rust or to remove the film on the metal surface. But. This is less effective when the hydrogen ion concentration of water is 5-6, and can be expected only in neutral water quality. In addition, when used in hot water, the constituents are hydrolyzed so that the effect is far away, and when used in copper pipes, copper pyrophosphate which is insoluble in water is generated to shorten the life of pipes, and when used in heat exchange pipes, slime is formed to transfer heat and It may interfere with circulation.

In addition, conventional phosphate-based cleaning agents have the disadvantage of being economically expensive.

Moreover, phosphate promotes eutrophication by dissolving a large amount in water, and promotes prosperity of green algae and red algae in the water, and when eutrophication occurs, fish and microorganisms are killed due to oxygen deficiency in the water. It is regulated to add phosphate to synthetic detergents.

In addition, the conventional cleaning agent can achieve the cleaning purpose of the metal tube, etc., but there is a harmful problem that lead is extracted by the corrosion of the metal tube, requires considerable care for use in water pipes, such as water pipes, drinking water.

Therefore, the object of the present invention is 50% by weight of silicate (purity 99.9%, 120 mesh powder), 30% by weight of anhydrous soda-ash, 15% by weight of sodium pyrophosphate and sodium triphosphate 5% by weight of sodium phosphate is uniformly mixed, the mixture is melted at about 1650 ° C., and the mixture is cooled and solidified at room temperature for 12 hours to provide an inexpensive detergent composition based on silicates and phosphates. It is.

The present inventors have mixed and tested various compositions of silicate and phosphate, and found that the founding agent having the above composition was low in cost but excellent in efficacy and completed the present invention.

The detergent composition of the present invention comprises 50% by weight of silicate (purity 99.9%, 120 mesh powder), 30% by weight of anhydrous soda-ash, 15% by weight of sodium pyrophosphate and sodium triphosphate. 5% by weight (sodium phosphate) is uniformly mixed, melted at about 1650 ° C., and then cooled and solidified at room temperature for 12 hours.

Hereinafter, the manufacturing method of the composition of this invention is demonstrated in detail.

When the composition of the present invention is dissolved in water by anhydrous sodium carbonate, it is a silicate and phosphate composite main body that forms a hydroxide hydroxide and forms a strong tetrahedral membrane on the metal surface. Sodium pyrophosphate, which forms complex salts with metal ions such as sodium carbonate, copper, iron, and magnesium, prevents the activation of metal ions, and prevents the activation of metal ions, and dissolves in water to hydrolyze to form pyrophosphate ions and soluble salts. It is prepared by incorporating sodium triphosphate, which disperses the corrosion factor on the surface and acts as a rust inhibitor by inhibiting the activation of ions.

Mixing of each component is good to use a mechanical stirrer to ensure that the foreign substances are mixed uniformly. The mixing unit was 500 kg.

The stirred mixture is subjected to a melting process in a high temperature furnace, and the melting temperature is not particularly limited as long as the mixed component can be completely dissolved, and about 1650 ° C is appropriate. The furnace uses a rotary burner is preferred for complete combustion, using indirect heat.

When the mixture is dissolved for about 24 hours, a transparent solution is formed and flows into the casting pedestal installed at the bottom of the melting furnace. When it is left at room temperature, it is naturally cooled to form solid crystals.

Broken masses during crystallization are redissolved.

In the composition of the present invention, the concentration of the phosphate salt is preferably used in a small amount, preferably 20% by weight or less in the total composition. The corrosion protection effect in the excess lead composition is inferior.

The silicate used in the composition is a poorly soluble substance, but when anhydrous sodium carbonate is added, the silicate is alkalized to dissolve in water and is decomposed to alkali silicate by an acid in the water to produce hydroxide dioxide. When the aqueous solution comes into contact with the metal surface, the double salt molecule has an electrochemical affinity for a small amount of metal oxide. The double salt molecule forms a thin and strong film of less than 1 micron on the metal surface to dissolve the metal. Prevents contact and acts as a rust preventive. The concentration of silicate does not exceed 50% by weight in the total composition.

In addition, the anhydrous sodium carbonate (Na ₂ CO ₃ ) in the composition changes the silicate to an alkali which can be dissolved in water, while hydrolyzed to show a strong alkalinity to reduce the iron oxide, etc. on the metal surface to remove the red rust Do it. In addition, the clean action is enhanced by a complex chemical function of silicate and anhydrous nitrate. Si ions in the silicate bond with the anions of organic substances in water to prevent them from adhering to the metal surface, and Na ions of anhydrous sodium carbonate function to suppress the electrochemical corrosion action of the charged metal ions in the water and the metal surface. .

In addition, sodium pyrophosphate (Na ₄ P ₂ O + 1OH ₂ O) in the composition has a weak alkalinity in water, when the aqueous solution is boiled, disodium hydrogen phosphate produced. Sodium pyrophosphate generates complex salts with ions such as Cu ²⁺ , Fe ²⁺ , Ma ²⁺ , and has a strong ability to inhibit the activation of ions. Therefore, it serves to inhibit or block the activity of the metal ions to prevent corrosion.

In addition, sodium triphosphate (Na ₃ PO ₄ ) in the composition is slightly alkaline to dissolve in water, mostly hydrolyzed to produce pyrophosphate ions and soluble salts, and active dispersing and solubilizing to corrode the metal surface It disperses and removes, and it suppresses the activation of an ion and performs anticorrosive effect.

The detergent of the present invention prepared according to the content of the above components smoothly removes scale or red rust formed on the metal surface by the synergistic action of each composition, suppresses the dispersion of foreign body corrosion factor and ionization activity, and forms a strong film. The anticorrosive effect can be maintained, and the anticorrosive and anticorrosive action of various metal pipe circulation coolers, heating pipes, industrial plants, and the like can be maintained, and as a colorless, odorless and nontoxic hygienic cleaning agent, zinc, Not only does it elute the metal materials such as copper and lead, it can be safely used for a long time, and the water tank of a large building such as an urban water pipe or an apartment can be cleaned cleanly even at a concentration of 10 µg / l. In particular, since it does not cause hydrolysis or eutrophication, even if it flows into the cold side, it does not cause the eutrophication of the stream or the death of fish or the death of microorganisms due to lack of oxygen, so that there is no pollution and can be used more sanitarily.

Hereinafter, the present invention will be described in more detail with reference to the following examples, but the foreign material does not limit the present invention in any way.

Example

Example 1

After mixing the ingredients shown in Table 1 in a mechanical stirrer and mixed evenly, the composition was taken out, put into a rotary melting furnace, and dissolved for 24 hours at a temperature of 1650 ℃. As the dissolution process proceeded, a glassy transparent liquid was formed, which was eluted to the lower outlet of the furnace to flow down to the casting plate, and then cooled at room temperature for about 12 hours. A clear crystalline agent has been commercialized and used as a corrosion inhibitor.

TABLE 1

The physical property test of the cleaning agent composition of this invention is shown in following Table 2.

TABLE 2

Example 2

The composition prepared according to Example 1 was compared with the efficacy of a conventional product. The commercial detergent product and the composition according to Example 1 were mixed in tap water, and then dipped into a tube made of a copper component and held there for 1 month. The results are shown in Table 3 below.

TABLE 3

As shown in Table 3 above, the silicate-based cleaning agent of the present invention could not only clean the surface of the copper pipe but also keep it in a circular state for almost a long time.

Example 3

The composition prepared in Example 1 was used to test the efficacy of the conventional product with respect to iron pieces in a similar manner as in Example 2. The results are shown in Table 3 below.

TABLE 4

As shown in Table 4 above, the silicate cleaning agent of the present invention not only cleans the scratched surface, but also maintains the metal surface in a circular state for a long time by anticorrosive action, and thus does not cause pollution problems.

The cleaning agent of the present invention can smoothly remove the scale and red rust formed on the metal surface by the synergistic action of each composition, and maintain the anticorrosive action by dispersing foreign substance corrosion factor, suppression of ionization activity action and formation of a strong film. In addition, it can clean and anticorrosive pipes of various metal pipe circulation coolers, heating pipes, industrial plants, etc., and it will not elute heavy metal materials such as zinc, copper, and lead when used as colorless, odorless, and nontoxic hygienic cleaning agents. In addition, it can be safely used for a long time, and the water tank of a large building such as an urban water pipe or an apartment can be cleanly cleaned even at a concentration of 10 µg / l. In particular, since hydrolysis or eutrophication does not occur, even if flowed into the river eutrophication of the stream or lack of oxygen does not cause death of fish or killing of microorganisms, there is an effect that can be used more hygienic without causing pollution.

Claims (2)

50% by weight of silicate (purity 99.9%, 120 mesh powder), 30% by weight of anhydrous sodium-ash, 15% by weight of sodium pyrophosphate and 5% of sodium phosphate The detergent composition which mixes% uniformly, melts this mixture at about 1650 degreeC, and melts and solidifies by cooling and solidifying at room temperature for 12 hours. 50% by weight of silicate (purity 99.9%, 120 mesh powder), 30% by weight of anhydrous sodium-ash, 15% by weight of sodium pyrophosphate, and third-party sodium phosphate Mixing the weight percentages uniformly, melting the mixture at about 1650 ° C. A method for producing a detergent composition based on silicates and phosphates, comprising cooling and solidifying the melt at room temperature for 12 hours.