WO2019193919A1

WO2019193919A1 - Fire extinguishing agent

Info

Publication number: WO2019193919A1
Application number: PCT/JP2019/009216
Authority: WO
Inventors: 大矢　淳之; 藤田　諭
Original assignee: モリタ宮田工業株式会社
Priority date: 2018-04-02
Filing date: 2019-03-08
Publication date: 2019-10-10
Also published as: JP6644280B2; KR20200136947A; JP2019180465A; CN112004581A; TW201943439A; CN112004581B; TWI806972B

Abstract

This fire extinguishing agent comprises: a carboxylic acid alkali metal salt comprising one or two or more selected from among potassium acetate, potassium citrate, sodium acetate, and sodium citrate; a natural surfactant comprising one or two or more selected from among a lecithin, a saponin, and a casein; and water, wherein 30-55 g of the carboxylic acid alkali metal salt and 0.107-0.200 g of the natural surfactant are contained in a total amount of 100 milliliters of the fire extinguishing agent, and the content ratio of the carboxylic acid alkali metal salt to the natural surfactant is 150:1-275:1 (the carboxylic acid alkali metal salt:the natural surfactant) by mass. Accordingly, the fire extinguishing agent exhibits excellent fire extinguishing performance while also being highly safe for the human body, and uses a reduced amount of natural surfactant.

Description

Fire extinguisher

The present invention relates to a fire extinguisher used for a fire extinguisher, a fire extinguisher, or a fire extinguishing equipment.

As a general aqueous fire extinguisher, there is a strengthening liquid fire extinguisher (potassium carbonate aqueous solution having a concentration of 35 to 40% by volume). This is effective for fire A (normal fire), fire B (oil fire) and fire C (electric fire), and is particularly effective in extinguishing tempura oil fires. Be careful.
Conventional fire extinguishing agents, including reinforced liquid fire extinguishing agents, do not ensure the safety of the ingredients to the human body. When a fire extinguisher is released due to a fire or misoperation, it is necessary to wash or dispose of the fire extinguisher attached. In other words, because the safety of the extinguishing agent component to the human body has not been secured, secondary damage will occur due to the addition of extinguishing agent in addition to those directly damaged by fire, so this may be reduced It has been demanded.

In Patent Document 1, 20 to 55 g of a carboxylic acid alkali metal salt and 0.10 to 2.0 g of a natural surfactant are contained in a total amount of 100 ml, and the carboxylic acid alkali metal salt and the natural surfactant are contained. Disclosed is a fire extinguisher in which the content ratio to the agent is, by mass ratio, carboxylic acid alkali metal salt: natural surfactant = 30: 1 to 100: 1.
According to Patent Document 1, it is possible to obtain a fire extinguisher that has both high fire extinguishing performance and high safety for the human body.

JP 2009-291257 A

Since natural surfactants are expensive, a large cost advantage can be obtained by reducing the amount used even slightly. However, the natural surfactant has an effect of foaming and covering the surface of the fire extinguisher, so that the fire extinguishing performance deteriorates when the amount of the natural surfactant used is reduced.
In Patent Document 1, although depending on the content ratio of the alkali metal carboxylate and the natural surfactant, etc., the natural surfactant is mixed in an amount of 1 to 2 g in a total amount of 100 ml. Sometimes the fire extinguishing performance is “◯” for any of the A fire, B fire, and tempura oil fire, indicating that it is particularly effective (Examples 6-3, 6-4, 10-3, 10-4 etc.). On the other hand, when a natural surfactant is mixed in a ratio of 0.05 to 0.20 g in a total amount of 100 ml, at least one of the fire extinguishing performance against A fire, B fire and tempura oil fire is “ “Δ” or “×” (Examples 6-1, 6-2, 10-1, 10-2, etc.).

Therefore, an object of the present invention is to provide a fire extinguishing agent that has both high fire extinguishing performance and high safety to the human body, and further uses a small amount of natural surfactant.

The fire extinguisher of the present invention according to claim 1 is composed of one or more carboxylic acid alkali metal salts selected from potassium acetate, potassium citrate, sodium acetate, and sodium citrate, lecithin, saponin, and casein. It is composed of one or more selected natural surfactants and water, and 30 to 55 g of the carboxylic acid alkali metal salt and 0.107 to the natural surfactant in a total amount of 100 ml. The ratio of the content of the alkali metal carboxylate and the natural surfactant is 0.200 g, and the weight ratio of the alkali metal carboxylate to the natural surfactant: the natural surfactant = 150: 1 to It is characterized by being 275: 1.

The present invention according to claim 2 is the fire extinguisher according to claim 1, wherein the alkali metal carboxylate is one or both of acetic acid and citric acid, one or both of potassium carbonate and sodium carbonate, It is obtained by mixing and reacting.

The present invention according to claim 3 is the fire extinguishing agent according to claim 1 or claim 2, wherein the lower alcohol having 4 or less carbon atoms specified in the food additive is added in a mass ratio with respect to the natural surfactant. The natural surfactant: the lower alcohol = 1: 2 to 1:40.

The present invention according to claim 4 is characterized in that the extinguishing agent according to any one of claims 1 to 3 has a pH of 5.5 to 8.5.

According to the fire extinguisher of the present invention, it is possible to provide a fire extinguisher that has both high fire extinguishing performance and high safety for the human body, and further uses a small amount of natural surfactant.

The fire extinguisher according to the first embodiment of the present invention includes one or more carboxylic acid alkali metal salts selected from potassium acetate, potassium citrate, sodium acetate, and sodium citrate, lecithin, saponin, and It is composed of one or more natural surfactants selected from casein and water, and 30 to 55 g of carboxylic acid alkali metal salt and 0.107 to natural surfactant in a total amount of 100 ml. It is contained at a ratio of 0.200 g, and the content ratio of the carboxylic acid alkali metal salt to the natural surfactant is, by mass ratio, carboxylic acid alkali metal salt: natural surfactant = 150: 1 to 275: 1. is there.
According to the present embodiment, it is possible to provide a fire extinguisher that has both a high fire extinguishing performance and a high safety to the human body and further uses a small amount of a natural surfactant.

Carboxylic acid alkali metal salt is an effective component for extinguishing fires of fire A (normal fire) and tempura oil fire. The natural surfactant has an effect of suppressing evaporation and diffusion of the flammable gas of B fire (oil fire) by foaming and covering the surface of the fire extinguisher. Therefore, according to the present embodiment, it is possible to provide a fire extinguisher having high fire extinguishing performance for any fire of fire A (normal fire), fire B (oil fire), and tempura oil fire. In addition, since the fire extinguisher for C fire (electric fire) is different from other fire extinguishers only in the way of extinguishing the fire extinguisher component, the fire extinguisher of this embodiment is also high for C fire (electric fire). Has fire extinguishing performance.

Among alkali metal carboxylates, potassium citrate, sodium acetate, and sodium citrate are components recognized as food additives in Japan. Potassium acetate is a component that has been confirmed to be safe for the human body as a result of a safety evaluation test by FAO (United Nations Food and Agriculture Organization) and JECFA (Joint Food Additives Expert Committee) under WHO (World Health Organization). Used as a food additive in the EU countries.
Lecithin, saponin, and casein are ingredients that are recognized as food additives in Japan.
Therefore, the fire extinguisher of this embodiment ensures high safety for the human body.
Moreover, the fire extinguisher of this embodiment may add an additive as needed, However, The additive shall be the component designated as the food additive.

If the content of alkali metal carboxylate is less than 20 g, fire extinguishing performance of A fire, B fire, and tempura oil fire is insufficient (specified by the Ministry of Internal Affairs and Communications “Ministerial Ordinance for Establishing Technical Standards for Fire Extinguishers”) Pass the test). If the content of the alkali metal carboxylate salt exceeds 55 g, the change with time is likely to occur, and the quality change test specified in the Ministry of Internal Affairs and Communications “Ministerial Ordinance for Establishing Technical Standards for Fire Extinguishers” fails. If the content of the natural surfactant is less than 0.100 g, the fire extinguishing performance of fire A and fire B will be insufficient. When the content of the natural surfactant exceeds 2.00 g, a change with time tends to occur.

The second embodiment of the present invention is the fire extinguisher according to the first embodiment, wherein the alkali metal carboxylate is one or both of acetic acid and citric acid, and one or both of potassium carbonate and sodium carbonate. And obtained by mixing and reacting.
According to the present embodiment, using an alkali metal carboxylate obtained by mixing and reacting either or both of acetic acid and citric acid and either or both of potassium carbonate and sodium carbonate. Can do.
Acetic acid, citric acid, potassium carbonate, and sodium carbonate are components recognized as food additives in Japan.

In the fire extinguishing agent according to the first or second embodiment, the third embodiment of the present invention is a mass ratio of lower alcohol having 4 or less carbon atoms designated as a food additive to a natural surfactant. And natural surfactant: lower alcohol = 1: 2 to 1:40.
According to the present embodiment, fire extinguishing performance can be improved.
Examples of the lower alcohol having 4 or less carbon atoms specified for food additives include glycerin, propylene glycol, and polyethylene glycol.

According to a fourth embodiment of the present invention, the extinguishing agent according to any one of the first to third embodiments has a pH of 5.5 to 8.5.
According to this embodiment, it is possible to prevent corrosion of a fire extinguisher or the like. In addition, it becomes easy to corrode iron and aluminum as pH is less than 5.5. When pH exceeds 8.5, it will become easy to corrode aluminum.

Hereinafter, the fire extinguisher by one Example of this invention is demonstrated.
[Comparative Example 1-1]
30 g of potassium acetate and 0.050 g of saponin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The "potassium acetate: saponin" of this fire extinguishing agent is "600: 1" by mass ratio.
[Comparative Example 1-2]
30 g of potassium acetate and 0.100 g of saponin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The “potassium acetate: saponin” of this fire extinguishing agent is “300: 1” in mass ratio.
[Comparative Example 1-3]
30 g of potassium acetate and 0.107 g of saponin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The “potassium acetate: saponin” of this fire extinguishing agent is “280: 1” in mass ratio.
[Example 1-1]
30 g of potassium acetate and 0.111 g of saponin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The "potassium acetate: saponin" of this fire extinguisher is "270: 1" by mass ratio.
[Example 1-2]
30 g of potassium acetate and 0.115 g of saponin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The "potassium acetate: saponin" of this fire extinguishing agent is "260: 1" by mass ratio.
[Example 1-3]
30 g of potassium acetate and 0.150 g of saponin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The "potassium acetate: saponin" of this fire extinguishing agent is "200: 1" by mass ratio.
[Example 1-4]
30 g of potassium acetate and 0.200 g of saponin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The “potassium acetate: saponin” of this fire extinguishing agent is “150: 1” in mass ratio.
In Comparative Examples 1-1 to 1-3 and Examples 1-1 to 1-4, commercially available potassium acetate can be used. For example, acetic acid having a purity of 100% (molecular weight 60 ) 18.4 g and 16.2 g of potassium carbonate (molecular weight 138) with a purity of 99.5% may be mixed and reacted at 50 ° C. or lower, followed by a purification step.

[Comparative Example 2-1]
30 g of potassium acetate and 0.050 g of lecithin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The extinguishing agent “potassium acetate: lecithin” is “600: 1” in mass ratio.
[Comparative Example 2-2]
30 g of potassium acetate and 0.100 g of lecithin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The extinguishing agent “potassium acetate: lecithin” is “300: 1” in mass ratio.
[Comparative Example 2-3]
30 g of potassium acetate and 0.107 g of lecithin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The extinguishing agent “potassium acetate: lecithin” is “280: 1” in mass ratio.
[Example 2-1]
30 g of potassium acetate and 0.111 g of lecithin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The extinguishing agent “potassium acetate: lecithin” is “270: 1” in mass ratio.
[Example 2-2]
30 g of potassium acetate and 0.115 g of lecithin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The extinguishing agent “potassium acetate: lecithin” is “260: 1” in mass ratio.
[Example 2-3]
30 g of potassium acetate and 0.150 g of lecithin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The "potassium acetate: lecithin" of this fire extinguishing agent is "200: 1" by mass ratio.
[Example 2-4]
30 g of potassium acetate and 0.200 g of lecithin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The extinguishing agent “potassium acetate: lecithin” is “150: 1” in mass ratio.
In Comparative Examples 2-1 to 2-3 and Examples 2-1 to 2-4, commercially available potassium acetate can be used. For example, acetic acid having a purity of 100% (molecular weight of 60 ) 18.4 g and 16.2 g of potassium carbonate (molecular weight 138) with a purity of 99.5% may be mixed and reacted at 50 ° C. or lower, followed by a purification step.

[Comparative Example 3-1]
30 g of potassium acetate and 0.050 g of casein were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The "potassium acetate: casein" of this fire extinguishing agent is "600: 1" by mass ratio.
[Comparative Example 3-2]
30 g of potassium acetate and 0.100 g of casein were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The "potassium acetate: casein" of this fire extinguishing agent is "300: 1" by mass ratio.
[Comparative Example 3-3]
30 g of potassium acetate and 0.107 g of casein were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The "potassium acetate: casein" of this fire extinguishing agent is "280: 1" by mass ratio.
[Example 3-1]
30 g of potassium acetate and 0.111 g of casein were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The “potassium acetate: casein” of this fire extinguishing agent is “270: 1” in mass ratio.
[Example 3-2]
30 g of potassium acetate and 0.115 g of casein were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The "potassium acetate: casein" of this fire extinguishing agent is "260: 1" by mass ratio.
[Example 3-3]
30 g of potassium acetate and 0.150 g of casein were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The "potassium acetate: casein" of this fire extinguishing agent is "200: 1" by mass ratio.
[Example 3-4]
30 g of potassium acetate and 0.200 g of casein were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The "potassium acetate: casein" of this fire extinguishing agent is "150: 1" in mass ratio.
In Comparative Examples 3-1 to 3-3 and Examples 3-1 to 3-4, commercially available potassium acetate can be used. For example, acetic acid having a purity of 100% (molecular weight of 60 ) 18.4 g and 16.2 g of potassium carbonate (molecular weight 138) with a purity of 99.5% may be mixed and reacted at 50 ° C. or lower, followed by a purification step.

[Comparative Example 4-1]
30 g of potassium acetate, 0.030 g of saponin, 0.010 g of lecithin and 0.010 g of casein were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The “potassium acetate: surfactant” of this fire extinguishing agent is “600: 1” in mass ratio.
[Comparative Example 4-2]
30 g of potassium acetate, 0.060 g of saponin, 0.030 g of lecithin and 0.010 g of casein were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The “potassium acetate: surfactant” of this fire extinguishing agent is “300: 1” in mass ratio.
[Comparative Example 4-3]
30 g of potassium acetate, 0.060 g of saponin, 0.030 g of lecithin and 0.017 g of casein were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The “potassium acetate: surfactant” of this fire extinguisher is “280: 1” in mass ratio.
[Example 4-1]
30 g of potassium acetate, 0.070 g of saponin, 0.030 g of lecithin and 0.011 g of casein were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The “potassium acetate: surfactant” of this fire extinguishing agent is “270: 1” in mass ratio.
[Example 4-2]
30 g of potassium acetate, 0.070 g of saponin, 0.030 g of lecithin and 0.015 g of casein were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The “potassium acetate: surfactant” of this fire extinguishing agent is “260: 1” in mass ratio.
[Example 4-3]
30 g of potassium acetate, 0.080 g of saponin, 0.040 g of lecithin and 0.030 g of casein were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The “potassium acetate: surfactant” of this fire extinguishing agent is “200: 1” in mass ratio.
[Example 4-4]
30 g of potassium acetate, 0.100 g of saponin, 0.060 g of lecithin and 0.040 g of casein were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The “potassium acetate: surfactant” of this fire extinguishing agent is “150: 1” in mass ratio.
In Comparative Examples 4-1 to 4-3 and Examples 4-1 to 4-4, commercially available potassium acetate can be used. For example, acetic acid having a purity of 100% (molecular weight of 60 ) 18.4 g and 16.2 g of potassium carbonate (molecular weight 138) with a purity of 99.5% may be mixed and reacted at 50 ° C. or lower, followed by a purification step.

[Summary of Comparative Example 1-1 to Comparative Example 4-3 and Example 1-1 to Example 4-4]
The pH of each fire extinguisher of Comparative Example 1-1 to Comparative Example 4-3 and Example 1-1 to Example 4-4 was measured. For fire extinguishing performance of fires A, B, and tempura oil, extinguish the A-1 and B-1 models using the test method in accordance with the Ordinance of the Ministry of Internal Affairs and Communications "Ministerial Ordinance for Establishing Technical Standards for Fire Extinguishers." The experiment was conducted. The tempura oil fire was also tested by a test method according to the Ministry of Internal Affairs and Communications “Ministerial Ordinance for Establishing Technical Standards for Fire Extinguishers”. At the time of fire extinguishing, each fire extinguisher was filled into a 3 L pressure-accumulating fire extinguisher, and the fire extinguisher was sprayed onto the fire extinguishing model from a mist nozzle attached to the fire extinguisher.

Regarding fire extinguishing performance, if the fire did not reignite within the prescribed time (2 minutes for fire A, 1 minute for fire B and tempura oil fire), “○” was accepted as acceptable, and the fire extinguisher was temporarily reactivated within the prescribed time. Those that were ignited were indicated by “△”, and those that could not be extinguished were indicated by “×”.
In addition, the alteration test was conducted in accordance with the “alteration test” stipulated in the Ministry of Internal Affairs and Communications ordinance “Ministry Ordinance for Establishing Technical Standards for Fire Extinguishers”. As a result, the case where there was no change in any of the appearance, pH and specific gravity was accepted, and “◯” was given, and the case where there was a change in one or more of the appearance, pH and specific gravity was assigned as “X”.
These results are shown in Table 1 for Comparative Example 1-1 to Comparative Example 1-3 and Example 1-1 to Example 1-4, and in Comparative Example 2-1 to Comparative Example 2-3 and Example 2-1. To Example 2-4 in Table 2, Comparative Example 3-1 to Comparative Example 3-3 and Example 3-1 to Example 3-4 in Table 3, Comparative Example 4-1 to Comparative Example 4-3 Table 4 shows Examples 4-1 to 4-4.

As shown in Tables 1 to 4, the fire extinguisher of this example is 30 g of potassium acetate, lecithin, even when the ratio of the natural surfactant in the total amount of 100 ml is suppressed to 0.200 g or less. A natural surfactant composed of one or more selected from saponin and casein at a ratio of 0.107 to 0.200 g, and the content ratio of the alkali metal carboxylate to the natural surfactant By setting the mass ratio of carboxylic acid alkali metal salt: natural surfactant = 150: 1 to 270: 1, fire extinguishing performance against fire A, fire B, and tempura oil fire is all high. It can be seen that
Moreover, since the result of the alteration test is “◯”, it is excellent in quality retention.
In addition, potassium acetate is a component that is used as a food additive in EU countries, and lecithin, saponin, and casein are components that are recognized as food additives in Japan, and thus are highly safe for the human body.

[Comparative Example 5-1]
20 g of potassium acetate and 0.170 g of saponin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. “Potassium acetate: saponin” of this fire extinguishing agent is “117: 1” in mass ratio.
In addition, although a commercial item can be used for potassium acetate, for example, 100% purity acetic acid (molecular weight 60) 12.2 g and 99.5% purity potassium carbonate (molecular weight 138) 14.0 g are mixed, You may use what was obtained by performing a refinement | purification process, after making it react at 50 degrees C or less.
[Comparative Example 5-2]
20 g of potassium acetate and 0.200 g of saponin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The “potassium acetate: saponin” of this fire extinguishing agent is “100: 1” in mass ratio.
In addition, although a commercial item can be used for potassium acetate, for example, 12.0 g of acetic acid having a purity of 100% (molecular weight 60) and 13.8 g of potassium carbonate having a purity of 99.5% (molecular weight 138) are mixed, You may use what was obtained by performing a refinement | purification process, after making it react at 50 degrees C or less.
[Example 5-1]
50 g of potassium acetate and 0.200 g of saponin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The "potassium acetate: saponin" of this fire extinguisher is "250: 1" by mass ratio.
In addition, although a commercial item can be used for potassium acetate, for example, 30.6 g of acetic acid having a purity of 100% (molecular weight 60) and 35.2 g of potassium carbonate having a purity of 99.5% (molecular weight 138) are mixed, You may use what was obtained by performing a refinement | purification process, after making it react at 50 degrees C or less.

[Comparative Example 6-1]
20 g of potassium citrate and 0.170 g of saponin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The “potassium citrate: saponin” of this fire extinguishing agent is “117: 1” in mass ratio.
[Comparative Example 6-2]
20 g of potassium citrate and 0.200 g of saponin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The extinguishing agent “potassium citrate: saponin” is “100: 1” in mass ratio.
In Comparative Example 6-1 and Comparative Example 6-2, commercially available potassium citrate can be used. For example, 11.9 g of citric acid having a purity of 100% (molecular weight 192) and purity of 99.5% 12.8 g of potassium carbonate (molecular weight 138) may be mixed and reacted at 50 ° C. or lower, and the product obtained by carrying out a purification step may be used.
[Example 6-1]
A fire extinguisher was obtained by putting 50 g of potassium citrate and 0.200 g of saponin into a container, adding water to make 100 ml, and stirring. The extinguishing agent “potassium citrate: saponin” is “250: 1” in mass ratio.
A commercially available product can be used as potassium citrate. For example, 29.6 g of citric acid having a purity of 100% (molecular weight 192) and 31.9 g of potassium carbonate having a purity of 99.5% (molecular weight 138) are mixed. And after making it react at 50 degrees C or less, you may use what was obtained by performing a refinement | purification process.

[Comparative Example 7-1]
20 g of sodium acetate and 0.170 g of saponin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. This fire extinguishing agent “sodium acetate: saponin” is “117: 1” in mass ratio.
[Comparative Example 7-2]
20 g of sodium acetate and 0.200 g of saponin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The fire extinguishing agent “sodium acetate: saponin” is “100: 1” in mass ratio.
In Comparative Example 7-1 and Comparative Example 7-2, commercially available sodium acetate can be used. For example, 14.6 g of acetic acid (molecular weight 60) having a purity of 100% and carbonic acid having a purity of 99.5% are used. After mixing 12.9 g of sodium (molecular weight 106) and reacting at 50 ° C. or lower, the product obtained by carrying out a purification step may be used.
[Example 7-1]
50 g of sodium acetate and 0.200 g of saponin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The fire extinguishing agent “sodium acetate: saponin” is “250: 1” in mass ratio.
In addition, although a commercial item can be used for sodium acetate, for example, 36.6 g of acetic acid having a purity of 100% (molecular weight 60) and 32.3 g of sodium carbonate having a purity of 99.5% (molecular weight 106) are mixed, You may use what was obtained by performing a refinement | purification process, after making it react at 50 degrees C or less.

[Comparative Example 8-1]
20 g of sodium citrate and 0.170 g of saponin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. This fire extinguishing agent “sodium citrate: saponin” is “117: 1” in mass ratio.
[Comparative Example 8-2]
20 g of sodium citrate and 0.200 g of saponin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. This fire extinguishing agent “sodium citrate: saponin” is “100: 1” in mass ratio.
In Comparative Example 8-1 and Comparative Example 8-2, commercially available sodium citrate can be used. For example, 13.1 g of citric acid (molecular weight 192) with a purity of 100% and a purity of 99.5% 10.8 g of sodium carbonate (molecular weight 106) may be mixed and reacted at 50 ° C. or lower, and then the product obtained by carrying out a purification step may be used.
[Example 8-1]
50 g of sodium citrate and 0.200 g of saponin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. This fire extinguishing agent “sodium citrate: saponin” is “250: 1” in mass ratio.
In addition, although a commercial item can be used for sodium citrate, for example, 32.7 g of citric acid having a purity of 100% (molecular weight 192) and 27.0 g of sodium carbonate having a purity of 99.5% (molecular weight 106) are mixed. And after making it react at 50 degrees C or less, you may use what was obtained by performing a refinement | purification process.

[Summary of Comparative Example 5-1 to Comparative Example 8-2 and Example 5-1 to Example 8-1]
The pH of each fire extinguisher of Comparative Example 5-1 to Comparative Example 8-2 and Example 5-1 to Example 8-1 was measured. The freezing point and fire extinguishing performance of A fire, B fire, and tempura oil fire were tested by the test method according to the Ministry of Internal Affairs and Communications “Ministerial Ordinance for Establishing Technical Standards for Fire Extinguishers”. The fire extinguishing experiment and the freezing point were measured. The tempura oil fire was also tested by a test method according to the Ministry of Internal Affairs and Communications “Ministerial Ordinance for Establishing Technical Standards for Fire Extinguishers”. At the time of fire extinguishing, each fire extinguisher was filled into a 3 L pressure-accumulating fire extinguisher, and the fire extinguisher was sprayed onto the fire extinguishing model from a mist nozzle attached to the fire extinguisher.

Regarding fire extinguishing performance, if the fire did not reignite within the prescribed time (2 minutes for fire A, 1 minute for fire B and tempura oil fire), “○” was accepted as acceptable, and the fire extinguisher was temporarily reactivated within the prescribed time. Those that were ignited were indicated by “△”, and those that could not be extinguished were indicated by “×”.
In addition, the alteration test was conducted in accordance with the “alteration test” stipulated in the Ministry of Internal Affairs and Communications ordinance “Ministry Ordinance for Establishing Technical Standards for Fire Extinguishers”. As a result, “O” indicates that the appearance, pH, specific gravity, and freezing point temperature did not change, and “X” indicates that one or more of the appearance, pH, specific gravity, and freezing point temperature has changed. did.
These results are compared in Table 5 for Comparative Example 5-1, Comparative Example 5-2 and Example 5-1, and in Table 6 for Comparative Example 6-1, Comparative Example 6-2 and Example 6-1. Table 7-1 shows Example 7-1, Comparative Example 7-2 and Example 7-1, and Table 8 shows Comparative Example 8-1, Comparative Example 8-2 and Example 8-1.

As shown in Table 5 to Table 8, the fire extinguisher of this example is potassium acetate, potassium citrate, even when the ratio of the natural surfactant in the total amount of 100 ml is suppressed to 0.200 g. 50 g of sodium acetate or sodium citrate and 0.200 g of saponin, and the ratio of the content of alkali metal carboxylate to natural surfactant in terms of mass ratio, alkali metal carboxylate: natural It can be seen that by setting the surfactant to 250: 1, the fire extinguishing performance for the A fire, B fire, and tempura oil fire all have a high fire extinguishing performance of “◯”.
Moreover, since the result of the alteration test is “◯”, it is excellent in quality retention.
In addition, potassium acetate is a component that is used as a food additive in EU countries, and potassium citrate, sodium acetate, sodium citrate, and saponin are components that are recognized as food additives in Japan. Safety is also high.

[Example 9-1]
10 g of potassium acetate and 20 g of sodium acetate and 0.150 g of saponin were put in a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The “carboxylic acid alkali metal salt: saponin” of the fire extinguishing agent is “200: 1” in mass ratio.
As the carboxylic acid alkali metal salt, a commercially available product can be used. For example, 6.1 g of acetic acid having a purity of 100% and 7.0 g of potassium carbonate having a purity of 99.5% are mixed and reacted at 50 ° C. or lower. Then, a purification step was performed to take out 10 g of potassium acetate, and 14.6 g of 100% pure acetic acid and 12.9 g of 99.5% pure sodium carbonate were mixed and reacted at 50 ° C. or lower. You may use what extracted 20 g of sodium acetate by performing a refinement | purification process.
[Example 9-2]
5 g of potassium acetate, 20 g of sodium acetate, 5 g of potassium citrate, 25 g of sodium citrate and 0.200 g of saponin were added to a container, water was added to make 100 ml, and a fire extinguisher was obtained by stirring. The “carboxylic acid alkali metal salt: saponin” of the fire extinguishing agent is “275: 1” in mass ratio.
As the carboxylic acid alkali metal salt, a commercially available product can be used. For example, 3.0 g of acetic acid having a purity of 100% and 3.5 g of potassium carbonate having a purity of 99.5% are mixed and reacted at 50 ° C. or lower. After purifying, 5 g of potassium acetate was taken out, 2.9 g of 100% purity citric acid and 3.1 g of 99.5% purity potassium carbonate were mixed and reacted at 50 ° C. or lower. Then, 5 g of potassium citrate is taken out, 14.6 g of 100% pure acetic acid and 12.9 g of 99.5% pure sodium carbonate are mixed and reacted at 50 ° C. or lower, and then the purification step After removing 20 g of sodium acetate, 16.3 g of 100% pure citric acid and 13.5 g of 99.5% pure sodium carbonate were mixed and reacted at 50 ° C. or lower, followed by a purification step. , Ku Sodium phosphate 25g may be used after taken out.

[Summary of Example 9-1 and Example 9-2]
The pH of each fire extinguisher of Example 9-1 and Example 9-2 was measured. For fire extinguishing performance of fires A, B, and tempura oil, extinguish the A-1 and B-1 models using the test method in accordance with the Ordinance of the Ministry of Internal Affairs and Communications "Ministerial Ordinance for Establishing Technical Standards for Fire Extinguishers." The experiment was conducted. The tempura oil fire was also tested by a test method according to the Ministry of Internal Affairs and Communications “Ministerial Ordinance for Establishing Technical Standards for Fire Extinguishers”. At the time of fire extinguishing, each fire extinguisher was filled into a 3 L pressure-accumulating fire extinguisher, and the fire extinguisher was sprayed onto the fire extinguishing model from a mist nozzle attached to the fire extinguisher.

Regarding fire extinguishing performance, if the fire did not reignite within the prescribed time (2 minutes for fire A, 1 minute for fire B and tempura oil fire), “○” was accepted as acceptable, and the fire extinguisher was temporarily reactivated within the prescribed time. Those that were ignited were indicated by “△”, and those that could not be extinguished were indicated by “×”.
In addition, the alteration test was conducted in accordance with the “alteration test” stipulated in the Ministry of Internal Affairs and Communications ordinance “Ministry Ordinance for Establishing Technical Standards for Fire Extinguishers”. As a result, the case where there was no change in any of the appearance, pH and specific gravity was accepted, and “◯” was given, and the case where there was a change in one or more of the appearance, pH and specific gravity was assigned as “X”.
These results are shown in Table 9.

As shown in Table 9, the fire extinguisher of the present example is potassium acetate, potassium citrate, sodium acetate, even when the ratio of the natural surfactant in the total amount of 100 ml is suppressed to 0.200 g. Or 30 to 55 g of carboxylic acid alkali metal salt consisting of one or more selected from sodium citrate, and 0.150 to 0.200 g of saponin, and containing the carboxylic acid alkali metal salt and the natural surfactant. By setting the ratio of the content of carboxylic acid alkali metal salt: natural surfactant = 200: 1 to 275: 1 by mass ratio, all the fire extinguishing performance against A fire, B fire, and tempura oil fire is “ It turns out that it has a high fire extinguishing performance of “O”.
Moreover, since the result of the alteration test is “◯”, it is excellent in quality retention.
In addition, potassium acetate is a component that is used as a food additive in EU countries, and potassium citrate, sodium acetate, sodium citrate, and saponin are components that are recognized as food additives in Japan. Safety is also high.

As described above, according to Comparative Example 1-1 to Comparative Example 8-2 and Example 1-1 to Example 9-2, 1 or 2 selected from potassium acetate, potassium citrate, sodium acetate, and sodium citrate It consists of a carboxylic acid alkali metal salt consisting of the above, a natural surfactant consisting of one or more selected from lecithin, saponin, and casein, and water, and in a total amount of 100 ml, the carboxylic acid alkali metal 30 to 55 g of salt and 0.107 to 0.200 g of natural surfactant are contained, and the content ratio of the alkali metal carboxylate to the natural surfactant is the alkali metal carboxylate. A fire extinguisher with salt: natural surfactant = 150: 1 to 275: 1 has not only high fire extinguishing performance and high safety for human body, but also the use of natural surfactant. The amount is also excellent in cost because less is.

Further, the fire extinguishing agent of this example is a natural surfactant: lower alcohol = 1: 30 to 1 in a mass ratio of lower alcohol having 4 or less carbon atoms designated as a food additive to the natural surfactant. : It is preferable to contain by 40.
Thereby, fire extinguishing performance can be further improved while maintaining high safety for the human body.

In addition, it is preferable that the extinguishing agent of the present example has a pH of 5.5 to 8.5. Thereby, corrosion of a fire extinguisher etc. can be prevented.

Claims

A carboxylic acid alkali metal salt consisting of one or more selected from potassium acetate, potassium citrate, sodium acetate, and sodium citrate;
A natural surfactant consisting of one or more selected from lecithin, saponin, and casein;
water and,
Consisting of
In a total amount of 100 ml, 30 to 55 g of the carboxylic acid alkali metal salt and 0.107 to 0.200 g of the natural surfactant are contained,
The content ratio of the carboxylic acid alkali metal salt to the natural surfactant is, by mass ratio, the carboxylic acid alkali metal salt: the natural surfactant = 150: 1 to 275: 1. Fire extinguishing agent.
The alkali metal carboxylate is obtained by mixing and reacting either or both of acetic acid and citric acid and either or both of potassium carbonate and sodium carbonate. Item 2. A fire extinguisher according to item 1.
Containing a lower alcohol having 4 or less carbon atoms designated as a food additive in a mass ratio with respect to the natural surfactant in the ratio of the natural surfactant: the lower alcohol = 1: 30 to 1:40. The fire extinguisher of Claim 1 or Claim 2 characterized by the above-mentioned.
The fire extinguishing agent according to any one of claims 1 to 3, wherein the pH of the soot is 5.5 to 8.5.