WO2014208825A1

WO2014208825A1 - Manufacturing method for compound for detecting acid, alkali and toxic gas leaks, and use thereof

Info

Publication number: WO2014208825A1
Application number: PCT/KR2013/009374
Authority: WO
Inventors: 이석구; 이종구; 성대동
Original assignee: Lee Seoggoo; Lee Jonggu
Priority date: 2013-06-28
Filing date: 2013-10-21
Publication date: 2014-12-31
Also published as: KR101396268B1; JP5951898B2; JP2015530562A

Abstract

The present invention relates to a compound that changes colour in response to acids, alkali liquid chemicals and toxic gases, and the use thereof. The colours of acids, alkali liquid chemicals and toxic gases are mostly transparent like water (H₂O), and thus it is difficult for a person to immediately sense the danger thereof. For this reason, the risk of accidents is high, and a number of accidents associated with liquid chemicals and toxic gases occur at industrial sites. To solve this problem, the present invention provides a manufacturing method for a compound for detecting acid, liquid chemical and toxic gas leaks, and the use of the compound, wherein a paint is applied or a tape is wrapped on areas that have the potential for liquid chemical and gas leaks, the paint or tape containing a special reaction compound for detection that changes colour from yellow to red or from white to red if there is a liquid chemical or gas leak. Thus, the first person who finds the colour change can take quick action.

Description

Method for preparing a compound for detecting acid, base and toxic gas leakage and its use

The present invention relates to a method for producing a compound having an automatic detection function in the visible region in the case of acid, base and toxic gas leakage, and more particularly, the use thereof, and more particularly, through a pipeline in the production process It relates to a method for producing an environmentally friendly compound for visually detecting the leakage of acid, base and toxic gases in liquid and gaseous state and its use.

Conventional paints for detecting acid and base leaks, which are commonly used, are applied to pipelines to detect acid and base leaks. There are disadvantages.

That is, acids such as hydrochloric acid, sulfuric acid, hydrofluoric acid, nitric acid and acetic acid, which are frequently used in industrial manufacturing processes, bases (alkali) such as ammonia, sodium hydroxide, potassium hydroxide and barium hydroxide, manganese oxide and sodium oxide, Likewise, metal oxides that quickly turn into strong alkalis when contacted with moisture can cause fatal damage to humans and processes when leaked even in small amounts.

Current products include On Guard Acid Detecting Paint of Allison Engineering, Basildon Essex, UK, and Acid Leakage Detection Paint of RAMCO, NJ, USA. These products are easy to apply to pipelines where acid and base are leaked from outdoor exposed pipelines, but when applied to pipelines or precision facilities in indoor processes, the applied chemicals are harmful to humans and partially applied to precision equipment. It has the disadvantage of being damaged.

Many new inventions have been tried in the meantime to compensate for these drawbacks. Safe type acid leak sensors are invented by Spring G. Everett et al. (Inventor: Spring G. Everett, Keller, Jr. Douglas V., and etection with non-Toxic Liquids US Patent No. 08 / 281,854, Filed July 26 , 1994).

In addition, recently improved products that can automatically detect acid and base leaks include the invention of Joseph C. Farmer (inventor: Joseph C. Farmer, Paint for Detection of Corrosion and Warning of Chemical and Radiological Attack US Pat. No. 7,780,913 B2, filing date: August 24, 2010).

However, these products have a disadvantage in that the efficiency of the compound itself is reduced because of safety standards. Especially mountains. In industrial sites where base leaks, it can have a fatal effect on the human body in a short time, so it must be possible to immediately identify the leak site. And mountains. When the base leaks, the reaction of the compound should be immediately visible within micro time. That is, despite the fact that it should be immediately visible in the visible region and the fast time within the microseconds, the conventional products have a disadvantage that the reaction time is long and the leakage is not clear.

Therefore, live in the industrial field. When the base leaks, the compound should be able to respond and express immediately in a micro time. There has been a demand for compounds that can react in the wavelength range of 570-590 nm and in the range of 625-760 nm when the compound reacts with the leaked acid or base.

The present invention is to provide a method for producing a compound for the detection of environmentally friendly acid, base and toxic gas leakage that is safe for the applicator and minimizes the impact on the safety of the equipment after application and excellent in acid, base leakage, and its use Its purpose is.

In addition, another object of the present invention is to safeguard the applicator and to minimize the impact on the safety of the equipment after application, and to detect the environmentally friendly acid, base and toxic gas leakage that can be quickly detected in the visible light area when acid, base leakage It provides a method for preparing the compound and its use.

The present invention is characterized in that it comprises the process of preparing a first mixture by dissolving Methylene blue in distilled water and dissolved in sorbitol and the second mixture by adding this solution to a solution dissolved in sorbitol.

1 is a view showing a process for preparing a compound that automatically detects and reacts with acid leakage according to an embodiment of the present invention.

Figure 2 is a view showing a process for preparing a compound that automatically detects and reacts to the base (base) leak according to another embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In the following description will be presented a representative embodiment in the present invention to achieve the above technical problem. And other embodiments that can be presented with the present invention are replaced by the description in the configuration of the present invention.

The invention of the production line as well as acid. Compounds for detecting acid, base and toxic gas leaks, which can detect leaks from storage of bases and leaks when transporting tanks of acids and bases, protecting production facilities that can lead to large accidents and preventing human damage, And it is characterized in that the compound is blended paint and the tape coated with the compound, it is harmless to the human body when the paint is applied or the tape is attached to protect the production facility.

In addition, the present invention is a trace acid, base value valve, pump, flange, tank, precision measuring instrument, reagent field, pipe connection point, hose connection point, acid, base that can be harmful to the human body at the same time to damage the industrial facilities at the production site Compounds of the present invention (specifically, paints incorporating the compound or tape coated with the compound) are automatically detected and harmless to the human body when leaking in the transport vehicle or during the dispersion, storage and processing of acids and bases. At the same time, it is a clear visual indication that protects precision facilities while providing quick indication of leak points.

In addition, the present invention produces an environmentally friendly compound that does not cause secondary pollution when the compound is applied and at the same time the color change that is expressed in the visible light region reacts quickly and quickly, so that the first detector can easily respond to safety. A method for preparing a compound for detecting acid, base and toxic gas leakage and its use are presented.

Particularly, in the present invention, acids, bases, and toxicities having a function of blocking secondary pollutants of the compound itself and discoloring in vivid colors so that the compound reacts quickly in a microsecond time can be quickly responded by the first discoverer. A method of preparing a compound for detecting gas leakage and its use, specifically, a paint in which the compound is blended and a tape coated with the compound are provided.

In the present invention, in order to overcome the limitations of the conventional products to completely eco-friendly manufacturing by blocking the secondary pollution source completely harmless to the human body can visually detect the color change quickly and accurately when reacting with acid, base, Using a molecule that has been thermodynamically tested for a stable molecular structure that is not easily oxidized or reduced in air, a molecule having excellent chemical stability and no human toxicity was prepared.

In particular, in the present invention, in order to manufacture a special compound that does not cause secondary contamination among the compounds reacting with acid and base, the human body using a compound that is recognized by the World Health Organization and suitable for the German Merck Index and the material safety data sheet It is a technology to increase safety. In addition, among compounds that prevent secondary contamination, compounds that can react as quickly as possible to detect the detection of acid and base were prepared.

On the other hand, the technology employed in the present invention production line and acid. The production of special functional paints and tapes for coating sensors that protect leaks from base storage facilities and leaks when transporting tanks of acids and bases protect production facilities that can lead to large accidents and prevent human damage. In order to completely remove the secondary pollution source of the conventional product is to manufacture a product that is harmless to the human body when applied and protects the production facilities.

The technology to be solved in the present invention is a trace acid, base value valve, pump, flange, tank, precision measuring instrument, reagent field, pipe connection point, hose connection point, When leaking in the acid, base transport vehicle or acid, base dispersing, storage and processing step, the paint containing the compound of the present invention or the tape coated with the compound is automatically detected to protect human body and at the same time protect the precision facility. Visually and vividly to indicate where the leak is, accurately and quickly.

Therefore, the present invention is a method for producing a product that is safe for the applicator and minimizes the effect on the safety of the equipment after application and has excellent visual effect upon acid and base leakage. In addition, the present invention is the first to invent a technology for manufacturing an environmentally friendly product that is safe for the applicator and minimizes the effect on the safety of the equipment after application and can be quickly detected in the visible light region when acid and base leak.

Hereinafter, the present invention will be described in detail based on the preferred embodiment of the present invention, but the present invention is not limited to the embodiment.

{Example 1}

(1) Among the compounds that can be detected automatically when an acid or base leaks, the molecules that are harmless to the human body and prevent secondary pollution in the production process line react as follows.

That is, a compound that automatically detects a small leak of an acid or a base and reacts quickly in the visible range is discolored according to the pH value in the following Henderson-Hasselbalch equation (Formula 1).

Formula 1

In order to accelerate the discoloration reaction, the logarithm of the concentration ratio of the indicator reacting to the compound, the concentration of Hind, the acid participating in the reaction, and the concentration of Ind ^- generated by the base reacting with Hind is determined. It reacts quickly in the visible range of 500 ~ 780nm to maximize the visual effect and the compound itself should be an environment-friendly molecule that is harmless to the human body.

It satisfies these conditions and uses Methyl Orange, Methylene Blue, Methyl Yellow, Sorbitol, Ethyl Alcohol, Methyl Ethyl Ketone, Alizarin Yellow, which are harmless human body detection indicators, and Thymol Blue, Phenolphthalein, Sorbitol, Use Ethyl Alcohol, Cresol Red, 1,3-Dimethyl Aniline.

(2) To prepare 1 L of acid and base leak detection compound, the reaction mixture is carried out as follows.

A method for preparing a compound for acid leakage detection is as shown in FIG. 1, and the dispersion process of the pigment expression dye molecule having a leak acid detection function is described below.

That is, 0.00046 parts by weight of a pigment-expressing dye molecule methylene blue capable of reacting with the spilled acid is placed on a chemical balance. Prior to the solution of 110 parts by weight of sorbitol in 26 parts by weight of distilled water, 0,00046 parts by weight of methylene blue attached to the balance is added and stirred with a magnetic stirrer while heating at a temperature of 50 ° C. for 25 minutes (1 mixture).

4.78 parts by weight of methyl yellow is dispersed in distilled water with magnetic stirr. After sufficient dispersion, 28 parts by weight of sorbitol is added to a solution dissolved in distilled water, and stirred at a magnetic stirrer at a speed of 700 rpm while heating at a temperature of 80 ° C. for 30 minutes (2 mixtures).

Dissolve 0.00027 parts by weight of alizarin yellow in distilled water, stir with magnetic stirrer, add 31 parts by weight of sorbitol to the solution dissolved in distilled water, and stir with magnetic stirrer at 850 rpm for 55 minutes at 95 ° C (3 mixtures).

The above three mixtures (specifically, 1 + 2 + 3 mixtures presented above) are mixed together and heated while stirring with a magnetic stirrer at 600 rpm for 2 hours at 95 ° C. for 2 hours (4 mixtures).

18 parts by weight of palm oil is dissolved in anhydrous ethyl alcohol and heated at 100 ° C with stirring with a magnetic stirrer at a speed of 590 rpm for 1 hour (5 mixtures).

Four mixtures were added to the five mixtures and stirred at a magnetic stirrer at 300 rpm for three hours at 80 ° C. for five hours (6 mixtures).

The six mixtures were heated under vacuum distillation for 10 minutes under a reduced pressure of 10 mmHg to remove the distillation residue. The 6 mixture solution from which the distillation residue was removed was added to a mixed solvent of 30 parts by weight of butyl acetate and 70 parts by weight of xylene, and stirred at -780C for 2 hours using a magnetic stirrer at 780 rpm. Slowly raise the temperature and blow nitrogen gas at 30 ℃ while stirring with magnetic stirrer at 520rpm for 2 hours.

Next, the process of mixing the environment-friendly leak acid sensor compound and the coatable binder material is as described below.

The environmentally friendly sensor compound prepared above is reacted with the binder material as follows so that it can be clearly expressed in the eyes in the visible wavelength range of 570 ~ 590nm. Disperse 8 parts by weight of triethylamine in distilled water and stir vigorously with a magnetic stirrer at 880 rpm (7 mixtures).

28 parts by weight of titanium dioxide (nano powder: 25-70nm (xrd): BET surface area-20-25m ² / g) is added to the seven mixtures through a funnel and stirred at a speed of 500 rpm with a magnetic stirrer (8 mixtures). ).

Add 7.5 parts by weight of ammonium hydroxide (28% in H ₂ O, 99.99 +%) slowly to propoxy propanol and stir with a magnetic stirrer at 530 rpm.

3.23 parts by weight of iron (II) oxide (Fe ₂ O ₃ , 10mesh) is dispersed in distilled water and stirred at 4,000 rpm (9 mixtures).

After mixing the 8 mixture and the 9 mixture, 0.017 parts by weight of n-butyl alcohol, 0.456 parts by weight of calcium carbonate (CaCO 3, 10 μm, 98%) and 0.528 parts by weight of barium carbonate (BaCO ₃ , 26 μm, 99%) were added. Add slowly and stir at 5,000 rpm (10 mixtures). After adding the six mixtures from which the distillation residues were removed prior to the ten mixtures, the mixture was stirred at 57 ° C. with a magnetic stirrer for 6 hours at 6,700 rpm.

Next, a method for preparing a compound for detecting base leakage is as shown in FIG. 2, and the process of dispersing a pigment-expressing dye molecule having an automatic base leakage detection function is described below.

Add 0.018 parts by weight of thymol blue to a solution of 30.6 parts by weight of sorbitol in distilled water, and add 10 mL of 98% ethyl alcohol in a separate tube while stirring with a magnetic stirrer at 1200 rpm while heating at 80 ° C for 25 minutes (1 mixture). .

0.039 parts by weight of phenolphthalein was added to a solution of 29.2 parts by weight of sorbitol in distilled water, and 7.28 parts by weight of anhydrous ethyl alcohol (100% C ₂ H ₅ OH) was added thereto, followed by heating at a temperature of 55 ° C. for 2 hours at 690 rpm. Stir with a magnetic stirrer (2 mixtures).

Add 0.0062 parts of cresol red to a solution of 29.1 parts of sorbitol in distilled water, and stir with a magnetic stirrer at 870 rpm for 30 minutes at a temperature of 85 ° C (3 mixtures).

The above three mixtures (specifically, 1 + 2 + 3 mixture) are mixed one by one and heated by stirring with a magnetic stirrer at 70 ° C. for 38 hours for 1 hour (4 mixtures).

Dissolve 18.8 parts of palm oil in 220 mL of anhydrous ethyl alcohol and stir with a magnetic stirrer at 570 rpm for 20 minutes at 90 ° C. while blowing nitrogen gas under reduced pressure maintained at 15 mmHg (5 mixtures).

4 mixtures were added to the 5 mixtures and stirred for 6 hours at 60 ° C. with a magnetic stirrer at a speed of 930 rpm for 6 hours (6 mixtures).

The six mixtures were heated under vacuum distillation for 10 minutes under a reduced pressure of 10 mmHg to remove the distillation residue. The 6 mixture solution from which the distillation residue was removed was added to a mixed solvent of butyl acetate and 70 parts by weight of xylene, and stirred at a magnetic stirrer at 1120 rpm for 2 hours at -2 ° C. Slowly raise the temperature and stir with magnetic stirrer for 2 hours while blowing nitrogen gas at 30 ℃. Slowly add 2 g of 1,3-dimethyl aniline as a stabilizer to the 6 mixture from which the distillation residue was removed and stir at a speed of 370 rpm with a magnetic stirrer. A solution of 0.00071 parts by weight of triethylamine dispersed in distilled water is strongly stirred with a magnetic stirrer at a speed of 1830 rpm (7 mixtures).

Next, the process of incorporating the environmentally friendly leak base sensor compound and the coatable binder material is as described below.

8.18 parts by weight of titanium dioxide (nano powder: 25-70 nm (xrd): BET surface area-20-25 m ² / g) was added to the seven mixtures, and stirred with a magnetic stirrer at a speed of 5,500 rpm (8 mixtures).

Add 0.0021 parts of ammonium hydroxide (27% in H ₂ O, 99.99 +%) to propoxy propanol and stir with a magnetic stirrer at 840 rpm (9 mixtures).

A solution in which 0.0192 parts by weight of iron (II) oxide (Fe ₂ O ₃ , 10mesh) is dispersed in distilled water is stirred with a magnetic stirrer at 6,000 rpm (9 mixtures).

After mixing the 8 mixture and the 9 mixture, 0.013 parts by weight of n-butyl alcohol, 43.2 parts by weight of calcium carbonate (CaCO3, 10μm, 98%) and 46.9 parts by weight of barium carbonate (BaCO3, 26μm, 99%) were gradually added through the induction tube. And stir with a magnetic stirrer at a speed of 6,000 rpm (10 mixtures).

6 mixtures from which the distillation residues were removed prior to the 10 mixtures were added and then stirred with a magnetic stirrer at a speed of 7800 rpm for 4 hours at 85 ° C.

On the other hand, the compound prepared by the method as described above can be used for a variety of uses, the most preferred among them can be used by blending the compound in the paint, and then applying it to the above-mentioned pipeline. In addition, after applying the compound to a conventional tape, it can be used by winding the pipeline or the like. As described above, the compounds for detecting acid, base and toxic gas leaks prepared by the method according to the present invention are preferably used for the use of the above-described paints and tapes. However, the compounds of the present invention may be used in various forms. .

As described above, the compounds for detecting acid, base and toxic gas leakage according to the present invention can obtain the following technical features.

First, the present invention shows an excellent sensor effect in the acid, base leaking part as a method of manufacturing a product that can quickly detect acid, base leakage while preventing secondary contamination of the existing product.

The result of applying the sensor compound prepared by the present invention is as follows.

Almost all acids used in industrial sites, HCl, HNO ₃ , H ₂ SO ₄ , HF, H ₃ PO ₄ , CH ₃ COOH, HCOOH, HBr, HI, C ₆ H ₅ COOH, C ₆ H ₄ (COOH) ₂ , Pale yellowish to red in response to C ₂ H ₅ COOH, HClO ₄ , HClO ₃ , H ₃ BO ₃ , almost all bases (alkali), KOH, NaOH, NH ₃ , NH ₄ OH, Ba (OH) ₂ , Ca (OH) ₂ , C ₆ H ₅ NH ₂ , LiOH, CsOH, Mg (OH) ₂ , Be (OH) ₂ , Sr (OH) ₂ , Ra (OH) ₂ , FeO, CaO, Na ₂ O , Colorless to red in response to CoO, NiO, CuO, Mn (OH) ₂ , RhO.

Second, the reaction discoloration range of the sensor compound in the case of acid and base leakage can be used in all processes using acid and base.

(1) Visible Detection Range (Acid Leakage Detection Sensor)

pH range 7-14 (without acid leakage): Yellow (570-590 nm visible wavelength light region)

pH range 1 to 3 (acid leak): Red (620 to 750 nm visible wavelength light region)

(2) Visible Detection Range (Base Leakage Detection Sensor)

pH range 1 ~ 7 (No base (alkali) leak): White

pH range 10 ~ 13: Red (625 ~ 760nm visible wavelength light region)

Third, the function of the reaction sensor to detect acid and base leakage is excellent. It detects 10 ~ 150 times faster than existing products.

(1) The reaction time of the sensor produced in the present invention upon acid leakage is as follows.

Table 1

Detected Reaction Time <sup> * </ sup> for Sensor Paint Coated on the Iron Pipe with Various Acids

Experimental Number	Acid	Reaction time
One	HF	1 x 10 ^-5 second
2	HCI	1 x 10 ^-4 second
3	HBr	1 x 10 ^-6 second
4	H ₂ SO ₄	1 x 10 ^-5 second
5	(COOH) ₂	1 x 10 ^-6 second
6	TFA	1 x 10 ^-5 second
7	HNO ₃	1 x 10 ^-6 second
8	H ₃ PO ₄	1 x 10 ^-6 second

^* The reaction times were recorded by the laser flash photolysis method.

(2) The reaction time of the sensor prepared in the present invention during base leakage is shown in Table 2 below.

TABLE 2

Experimental Number	Base	Reaction time
One	KOH	1 x 10 ^-3 second
2	NaOH	1 x 10 ^-5 second
3	NH ₃	1 x 10 ^-4 second
4	NH ₄ OH	1 x 10 ^-5 second
5	Ba (OH) ₂	1 x 10 ^-3 second
6	Ca (OH) ₂	1 x 10 ^-5 second
7	C ₆ H ₂ NH ₂	1 x 10 ^-4 second
8	LiOH	1 x 10 ^-5 second
9	CsOH	1 x 10 ^-4 second
10	Mg (OH) ₂	1 x 10 ^-5 second
11	Be (OH) ₂	1 x 10 ^-3 second
12	Sr (OH) ₂	1 x 10 ^-5 second
13	Ra (OH) ₂	1 x 10 ^-3 second
14	FeO	1 x 10 ^-5 second
15	CaO	1 x 10 ^-4 second
16	Na ₂ O	1 x 10 ^-5 second

^* The reaction times were recorded by the laser flash photolysis method.

Fourth, the product of the present invention, which reacts rapidly when acid and base leaks to show the function of the sensor, is used for valves, pumps, flanges, tanks, precision measuring instruments, reagent stations, pipe connection points, hose connection points, acids, and base transports. The applicability was excellent when applied to detect leaks detected during vehicle, acid and base dispersion, storage and processing. When the acid and base leak sensor compounds prepared in the present invention were applied, the applicability was tested, and as shown in the following Table 3, Table 4, Table 5, Table 6 and Table 7, the performance of the product was superior to the existing sensor compounds. It was.

TABLE 3

Results of typical scratch test, shear test, and bend test on sensor paint for acid leakage with and without sputter cleaning after coating deposition on iron pipe after scratching treatment corresponding for three month period

Test method		Substratetreatment
	NoSputterCleaning	5 minSputter Cleaning	10 minSputter Cleaning
Scratch testLc (N)	6.6	29	68
Shear testFc (MNm ^-2 )	2.4	5.2	8.3
Bend test, Mechanical notch (MNm ^-3/2 )	1.3	5.6	8.4
Bend test, Copper Notch (MNm ^-3/2 )	0.78	3.5	7.1

Table 4

Results of typical scratch test, shear test, and bend test on sensor paint of acid leakage with and without sputter cleaning after coating deposition on PVC pipe after scratching treatment corresponding for three month period. The experimental results were obtained by Ergonic Workstation and 550 Shear / Scratch Tester, TABER.

Test method		Substratetreatment
	NoSputterCleaning	5 minSputter Cleaning	10 minSputter Cleaning
Scratch testLc (N)	5.2	27	64
Shear testFc (MNm ^-2 )	2.3	6.5	7.3
Bend test, Mechanical notch (MNm ^-3/2 )	1.6	6.3	9.2
Bend test, Copper notch (MNm ^-3/2 )	0.81	4.7	8.0

Table 5

Results of typical scratch test, shear test, and bend test on sensor paint for base leakage with and without sputter cleaning after coating deposition on iron pipe after scratching treatment corresponding for three month period. The experimental results were obtained by Ergonic Workstation and 550 Shear / Scratch Tester, TABER.

Test method		Substratetreatment
	NoSputterCleaning	5 minSputter Cleaning	10 minSputter Cleaning
Scratch testLc (N)	6.5	31	69
Shear testFc (MNm ^-2 )	2.6	5.4	8.1
Bend test, Mechanical notch (MNm ^-3/2 )	1.7	5.6	8.7
Bend test, Copper notch (MNm ^-3/2 )	0.83	3.7	7.4

Table 6

Results of typical scratch test, shear test, and bend test on sensor paint of base leakage with and without sputter cleaning after coating deposition on PVC pipe after scratching treatment corresponding for three month period. The experimental results were obtained by Ergonic Workstation and 550 Shear / Scratch Tester, TABER.

Test method		Substratetreatment
	NoSputterCleaning	5 minSputter Cleaning	10 minSputter Cleaning
Scratch testLc (N)	5.6	28	65
Shear testFc (MNm ^-2 )	2.8	6.7	7.4
Bend test, Mechanical notch (MNm ^-3/2 )	1.6	6.4	9.8
Bend test, Copper notch (MNm ^-3/2 )	0.84	4.9	8.2

TABLE 7

Relationship between porocity and thickness of sensor paints of acid leakage (A) and base leakage (B) after scratching treatment corresponding for three month period under the condition of each adhesive interlayer on the critical load of 120 Lc grams. The experimental results were obtained by Ergonic Workstation and 550 Shear / Scratch Tester, TABER.

Thickness (μm)		Porocity (dots / in ² )
	(A)		(B)
	Iron plate	PVC plate	Iron plate	PVC plate
10.0	2760.0	1876	2459.9	1657
20.0	4832.7	2145	4873.2	1986
30.0	7843.2	3547	7682.5	2876
40.0	10982	4587	9834.3	3652
50.0	15680	5490	13722	4898

The above results show the sensor paints are adequate for use of iron pipe or PVC pipe at least three months period. The experimental results were obtained by Ergonic Workstation and 550 Shear / Scratch Tester, TABER. The above results show the sensor paints are adequate for use of iron pipe or PVC pipe at least three months period. The experimental results were obtained by Ergonic Workstation and 550 Shear / Scratch Tester, TABER.

As shown in Tables 3 to 7, after the acid and base leak sensor compounds prepared in the present invention were applied to the surface of the steel pipe, the reaction result in the condition of the extreme condition was that in the present invention, when general paint was applied to the surface. It can be seen that the prepared is more than 21 ~ 38%.

In addition, the acid produced in the present invention when the acid and base leakage in general industrial sites, not extreme conditions. Acid leaked after application to iron and PVC pipes to check the coating stability of base leak sensor compound. The results of the test until the reaction with the base are shown in Table 8, Table 9, Table 10, and Table 11 below.

Table 8

ASTM Standard Test for Acid Sensor Paint Coated on the Steel Pipes by the Spot Methods (Triple-Spot Test (TST) and Single-Spot Test (SST)) after coated 18 months

	TST	TST	SST	TST
Coating	Total both sides	One Side Total	Both Sides	One side
Designation	(oz / ft ² )	(oz / ft ² )	(oz / ft ² )	(oz / ft ² )
G01	no detection	no detection	no detection	no detection
G30	0.28	0.08	0.26	0.06
G40	0.41	0.10	0.28	0.09
G60	0.61	0.17	0.34	0.13
G90	0.92	0.366	0.46	0.17
G100	1.02	0.37	0.73	0.18
G115	1.14	0.41	1.25	0.46
G140	1.47	0.52	1.43	0.67
G165	1.68	0.62	1.65	0.73
G185	1.84	0.63	1.74	0.89
G210	2.17	0.75	1.95	0.97
G235	2.36	0.89	2.01	1.25
G300	2.98	1.03	2.35	1.42
G360	3.62	1.30	3.03	1.52

* The data show the preservation period of the acid sensor paint after coated on the steel pipe is 18 months. The experimental results were obtained by Ergonic Workstation and 550 Shear / Scratch Tester, TABER.

Table 9

ASTM Standard Test for Base Sensor Paint Coated on the Steel Pipes by the Spot Methods (Triple-Spot Test (TST) and Single-Spot Test (SST)) after Coated 17 Months

	TST	TST	SST	TST
Coating	Total both sides	One Side Total	Both Sides	One side
Designation	(oz / ft ² )	(oz / ft ² )	(oz / ft ² )	(oz / ft ² )
G01	no detection	no detection	no detection	no detection
G30	0.25	0.07	0.24	0.03
G40	0.39	0.07	0.25	0.07
G60	0.59	0.15	0.31	0.11
G90	0.87	0.33	0.44	0.15
G100	1.01	0.35	0.70	0.17
G115	1.12	0.39	1.22	0.42
G140	1.39	0.48	1.41	0.64
G165	1.63	0.56	1.63	0.69
G185	1.82	0.61	1.69	0.78
G210	2.14	0.72	1.91	0.95
G235	2.33	0.84	1.99	1.22
G300	2.94	0.09	2.31	1.39
G360	3.60	1.28	3.02	1.48

* The data show the preservation period of the base sensor paint after coated on the steel pipe is 17 months. The experimental results were obtained by Ergonic Workstation and 550 Shear / Scratch Tester, TABER.

Table 10

ASTM Standard Test for Acid Sensor Paint Coated on the PVC Pipes by the Spot Methods (Triple-Spot Test (TST) and Single-Spot Test (SST)) after Coated 19 months

	TST	TST	SST	TST
Coating	Total both sides	One Side Total	Both Sides	One side
Designation	(oz / ft ² )	(oz / ft ² )	(oz / ft ² )	(oz / ft ² )
G01	no detection	no detection	no detection	no detection
G30	0.31	0.12	0.29	0.08
G40	0.43	0.15	0.31	0.12
G60	0.65	0.20	0.37	0.16
G90	0.94	0.39	0.49	0.19
G100	1.08	0.41	0.77	0.21
G115	1.17	0.46	1.29	0.49
G140	1.51	0.57	1.46	0.71
G165	1.72	0.65	1.68	0.76
G185	1.88	0.69	1.77	0.92
G210	2.21	0.78	1.99	1.02
G235	2.39	0.92	2.06	1.28
G300	3.02	1.06	2.42	1.46
G360	3.67	1.35	3.12	1.57

* The data show the preservation period of the acid sensor paint after coated on the steel pipe is 19 months. The experimental results were obtained by Ergonic Workstation and 550 Shear / Scratch Tester, TABER.

Table 11

ASTM Standard Test for Base Sensor Paint Coated on the PVC Pipe by the Spot Methods (Triple-Spot Test (TST) and Single-Spot Test (SST)) after Coated 18 months

	TST	TST	SST	TST
Coating	Total both sides	One Side Total	Both Sides	One side
Designation	(oz / ft ² )	(oz / ft ² )	(oz / ft ² )	(oz / ft ² )
G01	no detection	no detection	no detection	no detection
G30	0.28	0.10	0.27	0.04
G40	0.41	0.14	0.29	0.09
G60	0.62	0.17	0.35	0.13
G90	0.91	0.37	0.47	0.17
G100	1.04	0.39	0.72	0.19
G115	1.15	0.42	1.25	0.45
G140	1.41	0.52	1.44	0.66
G165	1.66	0.61	1.66	0.72
G185	1.85	0.65	1.69	0.80
G210	2.19	0.77	1.94	0.97
G235	2.37	0.86	2.02	1.26
G300	2.98	0.92	2.34	1.43
G360	3.66	1.33	3.05	1.50

* The data show the preservation period of the base sensor paint after coated on the PVC pipe is 18 months. The experimental results were obtained by Ergonic Workstation and 550 Shear / Scratch Tester, TABER.

In addition, as shown in Tables 8, 9, 10, and 11, after the acid and base leaking compounds prepared in the present invention were applied to the surface of the steel pipe, the surface of the reaction resulted in the conditions of mild natural conditions in general manufacturing sites. When applied to the surface it can be seen that 22 to 34% or more is prepared in the present invention more stable.

Fifth, the acid and base leak sensor compounds prepared in the present invention are chemically stable when applied to the process. In other words, it reacts with other molecules in the air until the acid and base are leaked, and the sensor itself does not lose its function and does not harm the human body. The high stability of the sensor molecules makes them suitable for all industrial production processes.

Sixth, since the acid base leak sensor compound prepared in the present invention is manufactured in an environmentally friendly manner, it does not cause secondary pollution to the applicator or the person working in the post-application process.

The present invention produces an environmentally friendly compound that does not cause secondary pollution when the compound is applied and simultaneously changes the color that is expressed in the visible region in a quick and quick response, so that the first detector can easily respond to safety. There is this. In addition, it has the advantage of blocking the secondary pollutant of the compound itself, and the compound reacts to the fast time within the microsecond time to implement the function of discoloring the vivid color so that the first detector can respond quickly.

In addition, the present invention is completely harmless to the human body in order to completely block the secondary pollutant in order to overcome the limitations of the conventional products and to produce environmentally friendly, it is possible to quickly and accurately detect the change of color visually when reacting with acid, base and Using thermodynamically tested molecules that have a stable molecular structure that is not easily oxidized or reduced in air, it has a synergistic effect with excellent chemical stability and no human toxicity.

Claims

Detecting acid, base, and toxic gas leaks by dissolving methylene blue in distilled water and adding it to a solution dissolved in sorbitol to make a first mixed solution and adding this solution to a solution dissolved in sorbitol. Method for preparing the compound for.
The method of claim 1,

Alizarin yellow is added to a solution of distilled water in sorbitol to form a third mixture, and a fifth mixture is prepared by adding ethyl alcohol and palm oil to detect acid, base, and toxic gas leaks. Manufacturing method.
A process of preparing a first mixed solution by adding thymol blue to a solution of sorbitol in distilled water and adding ethyl alcohol. A process for preparing an acid, base and toxic gas leak, characterized in that the phenolphthalein is added to a solution of distilled water in sorbitol and anhydrous ethyl alcohol is added to prepare a second mixture.
The method of claim 3,

For the detection of acid, base and toxic gas leakage, the process consists of preparing a third mixture by adding Cresol red to a solution of distilled water in sorbitol and preparing a fifth mixture by dissolving ethyl alcohol in palm oil. Method for preparing the compound.
The method according to any one of claims 1 to 3,

Vacuum distillation of the mixture under reduced pressure to remove distillation residues and a process for adding 1,3-dimethyl aniline as a stabilizer to the mixture solution from which the distillation residues were removed. Manufacturing method.
The method according to any one of claims 1 to 3,

A process for preparing a compound for acid, base and toxic gas leakage detection comprising the process of preparing a seventh mixed solution by adding triethylamine to secondary distilled water and preparing an eighth mixed solution by adding titanium dioxide.
The method according to any one of claims 1 to 3,

The detection of acid, base, and toxic gas leaks consists of preparing a ninth mixture by adding ammonium hydroxide to propoxy propanol and preparing a tenth mixture by adding n-butyl alcohol and calcium carbonate to the ninth mixture. Method for preparing a compound for
Paint formulated with compounds for acid, base and toxic gas leak detection.
Tape coated with compounds for acid, base and toxic gas leak detection.