JPH0416181B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to an aqueous solution composition having antibacterial and deodorizing properties. More specifically, the present invention relates to an aqueous solution composition that exerts an antibacterial and deodorizing effect when directly sprayed on a source of bad odor, such as a toilet tank, sludge, kitchen waste, or a livestock shed, to which a liquid can be sprayed. [Prior Art] Many of the wastes generated in industry or in the living environment are odorous substances themselves, and odor from decomposition products generated by microorganisms often becomes a problem. In treating these wastes, it would be extremely effective if sterilization and deodorization could be completed in one process. In addition, an effective antibacterial and deodorizing agent is long-awaited in order to protect workers who process these wastes from industrial diseases and to maintain sanitary conditions for processing equipment, transportation equipment, etc. Conventionally, many deodorizing agents, disinfectants, etc. have been put to practical use, but there are few that have both antibacterial and deodorizing effects. There are a few proposals that use chlorine dioxide, hypochlorite, and daltaraldehyde, but the range of odors that can be deodorized is limited, and their use tends to corrode peripheral equipment. There were problems such as sagging and dripping, and the results were not satisfactory. [Problems to be solved by the invention] We first investigated a deodorizing agent that is effective in deodorizing both alkaline malodorous substances and acidic malodorous substances and can be manufactured at low cost. , recognized that an aqueous deodorizing agent containing a strong metal salt such as zinc sulfate, a complexing agent, and a PH regulator, whose PH was adjusted to 5 to 9, had excellent deodorizing performance, and filed a patent application. (Tokugansho
61-191297). However, the removable type deodorizer can usually only be administered in an amount sufficient to cover the surface of the target such as dirt and sludge. Therefore, even if deodorization is performed when the object is removed, when the object is subsequently dug up for transportation, the odor is often generated again due to the influence of decomposed products caused by the generation of microorganisms. [Means for solving the problem] Glyoxal is one of the drugs known as a chemical deodorizer. Glyoxal deodorizes many malodorous substances by forming adducts with them. For example, it is known to deodorize armonia, amines, thioalcohols, etc. under acidic pH conditions (Japanese Patent Publication No. 36-2199), and to deodorize hydrogen sulfide under neutral pH conditions (Japanese Patent Publication No. 48-3383). As a result of continuing research on glyoxal, the present inventors noticed that the reaction conditions of glyoxal against malodorous substances are in a range close to that of the aqueous solution deodorizer whose main component is the above-mentioned strong metal salt. After preparing an aqueous solution composition with a pH adjusted to a specific range and examining its effects, it was found that the composition had a strong deodorizing effect and an antibacterial effect. I've reached it. [Structure of the Invention] That is, the present invention comprises a strong acid salt of a metal other than alkali metals and alkaline earth metals, a complex forming agent, glyoxal, and a PH adjustment necessary to adjust the PH of the solution to a range of 5 to 8. The present invention relates to an antibacterial and deodorizing composition comprising an aqueous solution containing the following agents. The strong acid salts of metals used in the present invention include sulfates, nitrates, and chlorides of aluminum, zinc, iron, copper, manganese, cobalt, nickel, etc., but specifically, aluminum sulfate and zinc sulfate are It is suitable for the purpose of the invention. Strong acid salt aqueous solutions of these metals exhibit acidity with a pH of 2 to 4 in a 10% aqueous solution, for example, and have a deodorizing effect on ammonium, amines, and the like. This aqueous solution contains a complexing agent and an alkaline
Adding a pH adjuster to adjust the pH to about 5 to 9 will have a deodorizing effect on hydrogen sulfide. As complexing agents, oxycarboxylic acids or their alkali salts, such as sodium citrate, sodium tartrate, sodium fumarate, etc., are used. In addition, sodium carbonate, potassium carbonate, or sodium bicarbonate is used as the pH adjuster, and a solution with good transparency can be obtained. Glyoxal is commercially available as a concentrated aqueous solution. That is, there is an aqueous solution with a specific concentration of 10 to 40%, and its pH is about 3 acidic. This glyoxal concentrated aqueous solution can be directly added and mixed with the above-prepared strong metal salt aqueous solution. In this case, even if an acidic glyoxal aqueous solution is added, the overall pH does not change much, and there is almost no need to add a pH adjuster. When the pH is finally adjusted to a range of 5 to 8, it exhibits a deodorizing effect against a wide range of malodors, and also exhibits a bacteriostatic effect against a wide range of bacteria, from gram-negative bacteria to gram-positive bacteria. It is sufficient that the amount of glyoxal contained in the aqueous solution composition of the present invention is 100 ppm or more,
A content of about 0.01 to 3% by weight is most appropriate. [Effects of the Invention] The antibacterial deodorizing composition of the present invention is itself a colorless and odorless transparent aqueous solution, has almost no corrosivity or toxicity, and can be stored for a long period of time. Sludge, municipal waste,
If sprayed on livestock waste, etc. as is or diluted appropriately with less than 200 times the amount of water, it will effectively deodorize those odors. Moreover, even if the object is dug up and transported after an appropriate period of time has elapsed after being sprayed, it can be treated in an almost odorless state if a light additional spray is applied. Even if relatively new kitchen waste is transported immediately after being sprayed, the odor can be significantly reduced, and the working environment can be greatly improved. Furthermore, the composition of the present invention diluted several tens of times with water is also effective when used for cleaning waste storage sites. [Examples] The present invention will be explained in more detail with reference to Examples below, but the present invention is not limited thereto. Example 1 Zinc sulfate heptahydrate 2g, 27% aluminum sulfate aqueous solution 15g, sodium citrate dihydrate 5.5g, 40
% glyoxal 4g, anhydrous potassium carbonate 3.5g,
A composition was obtained by mixing 70 g of water. Take 10 ml of the above aqueous solution 20 times diluted in a Petri dish, put it in a desiccator with an internal volume of 6.5, charge hydrogen sulfide in the desiccator to a concentration of 30 ppm, and measure the hydrogen sulfide gas concentration after a certain period of time using a detection tube. It was measured using Distilled water as control solution
Similar measurements were performed using 10 ml. Table 1 shows the results.
It was shown to. In addition, 10 ml of the 20-fold diluted solution was placed in a Petri dish, placed in a desiccator with an internal volume of 6.5, and ammonia was charged in the desiccator to a concentration of 300 ppm, and the ammonia concentration was measured after a certain period of time using a detection tube. . Similar measurements were performed using 10 ml of distilled water as a control solution. The results are shown in Table 2.

【table】

[Table] Example 2 The aqueous solution prepared in Example 1 was added to a sterile Trypto-Sawyer agar medium to give a 20-fold dilution to prepare a sterile agar medium. On the other hand, a sterile Trypto Soya agar medium containing no chemical solution was separately prepared (preparation of blank medium). Next, a bacterial suspension was prepared. as a strain
Pseudomonas aeruginosa IFO 3445,
Escherichia coli IFO 3301, Staphlococcus
A suspension of each of these strains at 10 ⁶ /ml was prepared in sterile physiological saline using an aureus IFO 3060. A platinum loop of each bacterial suspension was streaked onto the agar medium prepared above to a length of about 2 cm. This is 37℃
The cells were cultured for 48 hours. The culture results are shown in Table 3.

[Table] +: Bacterial growth -: No bacterial growth Example 3 The solution prepared in Example 1 was placed in a glass container, tightly closed, and stored in a constant temperature room at 40°C for 4 months. I did a test. After 4 months, a deodorization test for hydrogen sulfide and ammonia was conducted in the same manner as in Example 1. The results for hydrogen sulfide are shown in Table 4, and the results for ammonia are shown in Table 5. Furthermore, an antibacterial test was conducted in the same manner as in Example 2.
The results are shown in Table 6.

【table】

【table】

[Table] +: Bacterial growth -: Bacterial growth is not observed Example 4 A solution of 500 c.c. was prepared in the same manner as in Example 1,
Pour into a 500ml beaker. Next, a flat metal plate made of SS-41 and having dimensions of 50 mm x 30 mm x 3.0 mm without a welding beat was immersed in the above solution and left at 25°C for one month to conduct a corrosion experiment. The corrosion rate after one month is 0.0496 (mm/
Y), the best rank (Excellent resistance) in the American Corrosion Society's five-level evaluation criteria.
It was something that could fit in.

Claims (1)

[Claims] 1. A strong acid salt of a metal other than alkali metals and alkaline earth metals, a complex forming agent, glyoxal, and a PH adjusting agent necessary to adjust the PH of the solution to a range of 5 to 8. The complex forming agent is oxycarboxylic acid or polycarboxylic acid or a salt thereof, and the PH adjusting agent is sodium carbonate,
An antibacterial deodorizing composition characterized by being potassium carbonate or sodium bicarbonate. 2. The antibacterial and deodorizing composition according to claim 1, wherein the strong acid salt of a metal other than alkali metals and alkaline earth metals is aluminum sulfate or zinc sulfate.