JPH0639367B2 - Deodorizing and sterilizing composition - Google Patents

Description

The present invention relates to a composition for deodorization and sterilization,
More specifically, it relates to a deodorizing and sterilizing composition using chlorite.

[Conventional technology]

In our living environment, there are many sources of offensive odors such as dust, filth, and spoilage. The bad odor is not only a problem of odor but also a source of various bacteria, causing many problems in environmental hygiene.

Conventionally widely used methods for sterilization, disinfection and / or deodorization and deodorization are aromatic masking agents used in toilets, etc., or adsorbents such as activated carbon used in refrigerators, etc. It is utilized depending on the purpose such as a method of sterilizing or oxidatively decomposing, a method of fixing hydrogen sulfide with a metal salt, a neutralization method, and the like. Of these methods, the method of using chlorine dioxide as an oxidant is also very effective, but chlorine dioxide is very unstable and has a risk of explosion and corrosion, so it can be sold as a gas or an aqueous solution. However, since it is highly dangerous to transport, chlorate or chlorite was used as a raw material at the place of use, and the device became large, which was unsuitable for small to medium-sized applications. Therefore, various attempts have been made to keep the aqueous solution of chlorite stable and to generate chlorine dioxide when necessary. For example, in JP-A-54-140718, use of lactic acid, JP-A-61-181468. The publication proposes the use of dialdehyde compounds as stabilizers.

[Problems to be Solved by the Invention]

However, the results of the studies conducted by the present inventors on these stabilizers have not been sufficient.
In order to perform bleaching with chlorite in the most desirable manner, even if a stabilizer is added to a chlorinated hydrochloric acid aqueous solution, a constant pH is maintained for a long time, and bleached substances and sterilized substances are The desired reaction occurs only when added.

[Means for Solving the Problems]

As a result of intensive studies, the present inventors have found that a combination of chlorite and a stabilizer having a specific structure can solve such a problem.

That is, the present invention relates to an aqueous solution of chlorinated hydrochloric acid and general formula (I), (Wherein A ₁ represents a hydrogen atom or a lower alkyl group, A _{2 to} A ₆ represent a hydrogen atom, an alkali metal or an ammonium group) and a diphosphonic acid compound represented by the following formula for deodorization and sterilization. It is a thing.

The chlorite ClO ₂ ^- sodium chlorite have both if salt effects, including ions, alkali metal salts such as potassium chlorite, be used as the alkaline earth metal salts such as calcium chlorite it can. The chlorite aqueous solution is stable at room temperature, neutral or alkaline, and safe and easy to carry.

Specific examples of the diphosphonic acid compound represented by the general formula (I) include sodium hydroxyethylidene diphosphonate and sodium hydroxypropylidene diphosphonate.

In the present invention, chlorite is usually an aqueous solution such as 0.01 to 25
Used in the form of a wt% concentration.

The deodorizing and sterilizing composition of the present invention is produced by adding and mixing an aqueous solution of the organic phosphonic acid or / and its salt to the above aqueous solution of chlorite. The mixing ratio of the two can be changed over a wide range, for example,
The amount of the diphosphonic acid represented by the general formula (I) and / or its salt is 0.001 to 5 parts, and more preferably 0.01 to 2 parts, relative to 1 part of the chlorite.

The deodorizing and sterilizing composition of the present invention may further contain other components such as a fragrance and a pH adjusting agent, if necessary.

The deodorizing and sterilizing composition of the present invention is usually used in the form of an aqueous solution, but it may be in the form of an aerosol provided with a valve-type adjusting means which can be moved by merely applying light pressure with a finger. When used in an aqueous solution, the pH is 6-12, preferably 7.
If adjusted to 5 to 9.0, stability during storage is good and stable deodorizing and sterilizing effects can be obtained.

The method of using the deodorizing and sterilizing composition of the present invention is, for example, 10
The malodorous source is sprayed off as an aqueous solution having a concentration of about ppm to 10% by weight or in the form of an aerosol. In the case of a malodorous gas, it may be passed through the aqueous solution. In the case of a malodorous substance, the composition of the present invention may be dipped or coated with the composition of the present invention.

Since the deodorizing and sterilizing composition of the present invention has a strong deodorizing and sterilizing effect, it has a wide range of toilets, human waste, sewage treatment plants, dust treatment plants, atmospheric Nox, fishing boats, livestock houses, passenger cars contaminated with smoking, etc. It is applied to deodorize and sterilize the object of.

〔Example〕

 The present invention will be further described with reference to the following examples.

Example 1 Deodorization of hydrogen sulfide A diameter of 2 cm in the center of the desiccator with an internal volume of 4.5 above the eyes.
No. 5A filter paper with a cutout (Toyo Roshi Kaisha Ltd. product,
(Diameter 15 cm), and while injecting hydrogen sulfide gas with a syringe while suction-circulating at a flow rate of 1 / min with an air pump, 0.5 ml of the liquid deodorizing and sterilizing composition of the present invention ^{* 1} is filtered on a filter paper with a syringe. Then, the time-dependent change in the hydrogen sulfide concentration was measured with a gastex detector tube. Since the internal pressure of the desiccator changes depending on the amount of gas sampled from the desiccator for measurement and the amount of gas sampled in the detector tube also causes measurement error, the measured values were corrected by calculation. A blank test was conducted at the same time, and the results are shown in Table 1.

From the results of Table-1, the deodorizing composition of the present invention showed an excellent deodorizing effect on hydrogen sulfide.

Example 2 Deodorization of Ammonia Gas Using the same conditions and deodorizing apparatus as in Example 1, ammonia was deodorized instead of hydrogen sulfide. The concentration of ammonia was measured with a Gastec detector tube. The results are shown in Table-2.

The desorption and sterilization composition of the present invention showed an excellent desorption effect on ammonia.

Example 3 Deodorization of Hydrogen Sulfide Ammonia Mixed Gas Using the same apparatus as in Example 1, the hydrogen sulfide and ammonia gas were mixed in advance, and the reaction between hydrogen sulfide and ammonia gas was within the measurement error range within the measurement time. The composition for deodorization and sterilization of the present invention shown in Table 3 after confirming
^{* 1} Table 3 shows the results of adding 0.5 ml of hydrogen sulfide and ammonia over time and measuring the changes in their concentrations with a Gastec detector tube.

As is clear from the results in Table 3, the composition of the present invention exhibited an excellent deodorizing effect on a mixed gas of hydrogen sulfide and ammonia.

Example 4 Deodorization of Tobacco Odor Tobacco smoke and suction gas (gas inhaled into smoker's lungs) were put into a desiccator by attaching the cigarette smoking cylinder shown in FIG. 1 to the apparatus used in Example 1 by an air pump. Circulated. The smoking interval was 10 seconds, and the amount of sucked air was 1 / minute.

After smoking one mild seven light up to 1 cm from the filter part of the cigarette and extinguishing it, spray 2 ml ^{* 1} of the liquid deodorizing and sterilizing composition of the present invention on the filter paper with a syringe so that it is almost even. After being left overnight, the effect was measured by sensory test by the sense of smell. Table of these results
4 shows.

The odors were measured by 28 men aged 24 to 55 and 6 women aged. The composition of the present invention has an excellent deodorizing power for deodorizing the smoke odor of tobacco, and its effect can be easily discriminated even by a regular smoker. The filter paper in the desiccator in the blank test turned brown, but the filter paper sprinkled with the composition of the present invention was white and the decolorizing power of the tobacco tar was excellent.

Example 5 Stability of the composition for deodorization and sterilization of the present invention The composition of the present invention used in Example 1 was placed in a brown polyethylene bottle and allowed to stand at room temperature for 3 months, and the concentration of sodium chlorite in the composition was increased. Of pH, pH, and liquid color were measured. For comparison, a mixed solution using glyoxal described in JP-A-61-181468 (mixed solution of 5 g / sodium chlorite and 5 g / glyoxal) was also measured. These results are summarized in Table-5.

As is clear from Table 5, the stability of the composition of the present invention at room temperature after 3 months was also very excellent.

Example 6 Sterilization of bacteria and yeast As a sterilizing composition of the present invention, 10 g of sodium chlorite
/ And sodium hydroxyethylidene diphosphonate
A test sample solution was prepared by adjusting the pH of the aqueous solution at a concentration of 10 g / to 7.6 with formic acid.

The strain used is a normal liquid medium (meat extract, peptone, peptone, salmonella typhimurium, Bacillus subtilis, Saccharomyces cerevisiae).
Preculture was carried out for 18 hours at 37 ° C. with a salt, and 50 μl of the solution was diluted with 5 ml of sterilized water to obtain a test bacterial solution.

<Bacterial Density of Test Bacteria> Esterisha corai 3.0 × 10 ⁶ / ml Salmonella 8.8 × 10 ³ 〃 T. typhimurium Bacillus subtilis 5.1 × 10 ⁴ 〃 Saccharomyces cerevisiae 1.6 × 10 ⁴ 〃 sterile water 70 μl, normal liquid medium 100 μl, Test bacterial solution 10 μl
20 μl of the sample solution to be tested was added to the above solution and left at 25 ° C. for 4 hours. After allowing to stand, apply the whole amount on ordinary agar medium and leave at 37 ° C for 24 hours.
As a result of the time culture, it was confirmed that all strains were killed.

[Brief description of drawings]

FIG. 1 is a schematic view of a cigarette smoking tube, 1 is glass, 2 is a silicone rubber stopper, 3 is a Teflon bypass, 4 is a valve, 5 is a cigarette, and 6 is a common fitting. .

Claims (2)

[Claims] 1. A zincate aqueous solution and the following general formula (I): (Wherein A ₁ represents a hydrogen atom or a lower alkyl group, A _{2 to} A ₆ represent a hydrogen atom, an alkali metal or an ammonium group) and a diphosphonic acid compound represented by the following formula for deodorization and sterilization. object. 2. The above general formula (I) for 1 part of chlorite.
The deodorizing and sterilizing composition according to claim 1, wherein the amount of the diphosphonic acid compound represented by is 0.001 to 5 parts.