JPH0256406A - Deodorizing and germicidal composition - Google Patents

Abstract

PURPOSE:To obtain the subject composition, capable of exhibiting powerful deodorizing and germicidal effects and useful for deodorizing and sterilizing water closets, raw sewage treatment and waste disposal plants, nitrogen oxide in the air, fishing boats, livestock barns, fish processing industry, preventing perishables from putrefying, etc., by combining a chlorite with inorganic phosphoric acid compound. CONSTITUTION:A composition consisting of a mixture of an aqueous solution of a chlorite, such as sodium chlorite, in 0.01-25wt.% concentration with an alkaline metal phosphate, such as disodium phosphate, and/or a condensed phosphate, such as sodium metaphosphate (R=1) and sodium tripolyphosphate (R=1.67), expressed by the formula (x and y are coefficients; 0<R<3 when the ratio of x/y is R; A is alkaline metal; B is H; a and b are positive integers and a+b=2; a is 1 or 2). The above-mentioned composition may be used by a method for spraying or scattering the composition in the form of an aqueous solution in 10ppm-10wt.% concentration or aerosol on a bad smelling source, etc. In the case of a bad smelling gas, the gas may be passed through the aqueous solution or the composition may be applied by a showering method.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a deodorizing and sterilizing composition, and more particularly to a deodorizing and sterilizing composition using chlorite.

(Prior Art) There are many sources of bad odors such as dust, filth, and putrid matter in our living environment. Offensive odors are not just a problem of odor, but also become a source of various bacteria, causing many problems in terms of environmental hygiene.

Conventionally, methods widely used for sterilization, disinfection, and/or deodorization include aromatic masking agents used in toilets, adsorbents such as activated carbon used in refrigerators, and oxidizing agents. Various methods are used depending on the purpose, such as methods for deodorizing, sterilizing, or oxidative decomposition using metal salts, methods for fixing hydrogen sulfide using metal salts, and methods for neutralizing hydrogen sulfide. Among these methods, the method of using chlorine dioxide as an oxidizing agent is also very effective, but chlorine dioxide is extremely unstable and poses a high risk of explosion and corrosion, so it is not sold as a gas or as an aqueous solution. Because of the high risk of transportation, a chlorine dioxide generator using chlorate or chlorite as raw material is used at the site of use, but the equipment is large and unsuitable for small to medium-sized applications. . For this reason, although it is known for its deodorizing effect, it is not generally used, and it is hardly used in general households to this day. When chlorine dioxide is used as a deodorizing agent, it reacts with sulfur compounds, amine compounds, nitrogen oxides, etc. to detoxify and deodorize it, resulting in the effect of environmental purification. Conventional masking methods and the like have had no or only minimal effect on environmental purification. Therefore, various attempts have been made to keep the aqueous solution of chlorite stable and generate chlorine dioxide when necessary. For example, JP-A-54-140718 discloses the use of lactic acid; Then, the use of dialdehyde compounds, JP-A-60-1
No. 27201 proposes the use of a gelling agent made of higher fatty acids, proteins, and alkali metal salts as a stabilizer.

(Problems to be Solved by the Invention) However, the results of studies conducted by the present inventors regarding these stabilizers have not yet been satisfactory. In order for deodorization and sterilization using chlorite to be carried out in the most desirable manner, it is necessary to maintain a constant pH for a long time even if a stabilizer is added to the chlorite aqueous solution, and to remove odor components and sterilized substances. The desired chlorine dioxide is generated and an oxidation reaction occurs only when it encounters a substance.

(Means for Solving the Problems) The present inventors have proposed a method that can be widely used against these bad odors.
Moreover, as a result of extensive research into developing a deodorizing and sterilizing composition with disinfectant and sterilizing properties, we discovered that a combination of chlorite and an inorganic phosphoric acid compound could solve these problems. Ta.

x-Aa B b ○・yPxOs
(1) (In the formula, x'y represents a coefficient, selected from O<R<3 when the ratio of x/y is R, A represents an alkali metal atom, B represents a hydrogen atom, a, b is a positive integer and a+b=2, and a is 1 or 2. It is a composition for use.

CI as chlorous acid! , O2- ions are effective, and alkali metal salts such as sodium chlorite and potassium chlorite can be used. Chlorous acid aqueous solution is stable at room temperature, neutral or alkaline, and is safe and easy to transport.

Specific examples of the alkali metal phosphates include sodium phosphate, disodium phosphate, trisodium phosphate,
Examples include potassium phosphate, dipotassium phosphate, and tripotassium phosphate. As a specific example of the condensed phosphate represented by general formula (1), orthophosphate [(R
=3), polyphosphates (1<R<2), metaphosphates [(R=1), and ultraphosphates (0<R<1). In the present invention, chlorite is usually used in the form of an aqueous solution, for example in a concentration of 0.01 to 25% by weight.

The deodorizing and disinfecting composition of the present invention is produced by adding, dissolving and mixing an aqueous solution or solid substance of an alkali metal phosphate and/or an inorganic phosphoric acid compound represented by the general formula (T) to the above chlorite aqueous solution. be done. The mixing ratio of the two can be varied over a wide range, but for example, the above alkali metal phosphate and/or the inorganic phosphoric acid compound represented by the general formula (1), 0,001 to 1 part of chlorite. Parts to 5 parts, more preferably 0.01 to 2 parts.

The deodorizing and sterilizing composition of the present invention may further contain other components, such as perfumes, pH adjusters, etc., if necessary. As a pH adjuster, organic acids such as acetic acid and formic acid,
Mineral acids such as hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, etc. can be used.

The deodorizing and sterilizing composition of the present invention is usually used in the form of an aqueous solution, but may also be in the form of an aerosol equipped with a valve-type adjustment means that can be operated by applying light pressure with a finger. When used as an aqueous solution, adjusting the pH to 6 to 12, preferably 7.5 to 9.5, provides good stability during storage and provides stable deodorizing and sterilizing effects.

The method of using the deodorizing and sterilizing composition of the present invention includes, for example, 1
The odor source is sprayed or sprayed as an aqueous solution of about 0 ppm to 10% by weight or in the form of an aerosol, but in the case of a malodorous gas, it may be passed through an aqueous solution or a shower method may be used. In the case of malodorous substances, the composition of the present invention may be dipped or coated with the composition of the present invention.

The deodorizing and sterilizing composition of the present invention has strong deodorizing and sterilizing effects, so it can be used in toilets, human waste, sewage treatment plants, garbage treatment plants, nitrogen oxides in the atmosphere, fishing boats, livestock stands, seafood processing industries, and perishables. It can be applied to deodorize and sterilize a wide range of objects, such as preventing rot.

(Example) The present invention will be further explained below with reference to Examples.

Example 1 Deodorization of hydrogen sulfide Place a No. 5A filter paper (Toyo Roshi ■ product diameter 1ies) with a diameter 1 mark cutout in the center on the perforated plate of a desiccator with an internal volume of 4.51 cm, and use an air pump for 11 min. After injecting hydrogen sulfide gas with a syringe while suctioning and circulating it at a flow rate of Measured using a TEX detector tube. A blank test was also conducted at the same time, and the results are shown in Table 1.

Table-1 *1 The deodorizing composition of the present invention contains sodium chlorite 5
0 g/1. An aqueous solution of sodium phosphoric acid (10 g/f) was adjusted to pH 8.8 with formic acid.

From the results shown in Table i, the deodorizing composition of the present invention showed an excellent deodorizing effect against hydrogen sulfide.

Example 2 Deodorizing hydrogen sulfide Using the same equipment as in Example 1, 0.5 m of the deodorizing and sterilizing composition of the present invention was sprinkled onto a filter paper, and the concentration of hydrogen sulfide was changed in the same manner as in Example 1. It was measured.

The results are shown in Table-2.

Table 2: 10 g/1.2 and 3.4 phosphoric acid compounds in 50 g/l sodium solution. Each is a separate solution dissolved so that

As is clear from Table 2, the deodorizing and sterilizing composition of the present invention has an excellent deodorizing effect on hydrogen sulfide gas.

Example 3 Deodorization of hydrogen sulfide and ammonia mixed gas Using the same equipment as in Example 1, 0.5% of the deodorizing and sterilizing composition of the present invention shown in Table 3 was added to remove hydrogen sulfide and ammonia over time. Changes in concentration were measured using a Gastex detector tube. The results are shown in Table-3.

*1 The deodorizing and sterilizing composition of the present invention is chlorous acid *1 The same deodorizing and sterilizing composition as in Example 1 was used as the deodorizing and sterilizing composition of the present invention.

*2 Comparative example 1 is 50g/l of sodium chlorite alone
It is a solution of

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 Stability of the deodorizing and sterilizing composition of the present invention The composition of the present invention was placed in a transparent glass bottle and left at 50"C for 3 weeks. Changes in the concentration of sodium chlorite in the composition, changes in pH, and liquid color. For comparison, we measured the irregularities of JP-A-61-18
A mixed solution using glyoxal (a solution in which 1% by weight of glyoxal was dissolved in 10% by weight sodium chlorite) described in Japanese Patent No. 468 was also measured.

Hiroshi These results are summarized in Table-5.

*1 The composition of the present invention is a solution prepared by adjusting the pH of an 8% by weight solution of sodium chlorite and 1% by weight disodium phosphate solution with formic acid.

*2 Comparative example is a solution in which a 25% by weight sodium chlorite solution was diluted with ion-exchanged water and the pH was adjusted with formic acid.

*3 Comparative example is a mixed solution using glyoxal (a solution of 1% by weight glyoxal dissolved in 8% by weight sodium chlorite) described in JP-A-61-181468.

*4 Absorbance is the absorbance (-1
ogT).

From the results in Table 4, the deodorizing and sterilizing composition of the present invention was found to be 50%
There was no change in concentration or pH after storage for 3 weeks at °C.
In addition, there was little change in absorbance (coloring) and no odor was detected, indicating excellent stability.

Example 5 Sterilization of bacteria and yeast 10 g of sodium chlorite as a sterilization composition of the present invention
/f and disodium phosphate 10g/j! An aqueous solution with a concentration of 100% was adjusted to pH 8.8 with formic acid and used as a test sample solution.

The bacterial strains used were E. teriscia korai, Salmonella typhiculium, Bacillus subtilis, and Satucharomyces cerevisiae, and a normal liquid medium (meat extract, peptone,
A test bacterial solution was prepared by pre-cultivating the cells in 37° C. for 18 hours using sodium chloride (salt) and diluting 50μ2 of the culture with 5I11 of sterile water.

(Seedling density of test bacterial solution) Estelisha Corai 3.2X10” Ken Ild
Salmonella typhiculium 8.6X10' ke/d Bacillus subtilis 5.0X10' Ken-Satucharomyces cerevisiae], 8X10' ke/, d Sterile water 70d, normal liquid medium 100μ! , test bacterial solution 10
20 μl of the test sample solution was added to 1 μl of the solution, and the mixture was left at 25° C. for 4 hours. After being left to stand, the entire amount was applied to an ordinary agar medium and cultured at 37°C for 24 hours. As a result, it was confirmed that all the bacterial strains were extinct.

Example 5 Removal of Nitrogen Oxide Gas The deodorizing and sterilizing composition of the present invention was applied to a reaction tower (packed terraret) with a diameter of 200 m+ and a height of 11,000 m2.
Nitric oxide with a concentration of 11000 pp circulated at a flow rate of 61,/sin ~ 7.61/win and diluted with air for 6.717 sec (LVo, 21 s/sec)
When air is supplied to the reaction tower at a flow rate of
05 type). The results are shown in Table-5.

*1 The deodorizing and sterilizing composition used in Example 1 was used as the composition of the present invention.

*2 No gas was adjusted to 11,000 pp by mixing it with air from a high-purity nitrogen oxide cylinder (15 kg/c4 pack) manufactured by Takachiho Chemical Industry ■ using a gas divider (Standard Technology 5GI-3C5L). The span of the NOX meter was adjusted using standard nitrogen oxide gas for span adjustment.

As is clear from Table 5, the deodorizing and sterilizing composition of the present invention had an excellent deodorizing effect against nitrogen oxide gas.

Hodogaya Chemical Industry Co., Ltd.

Claims (1)

[Claims] 1. Chlorite aqueous solution and alkali metal phosphate and/or general formula (I) x・A_aB_bO・yP_2O_5(I) (in the formula x
・y represents a coefficient, and when the ratio of x/y is R, 0<R
<3, A represents an alkali metal atom, B represents a hydrogen atom, a, b are positive integers and a+b=2,
a is 1 or 2. ) A liquid deodorizing and disinfecting composition comprising a mixture of condensed phosphates represented by: