JPS62258665A - Deodorant composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an aqueous deodorizing composition suitable for use by directly spraying on sources of odor such as kitchen waste, sludge, and livestock sheds. relates to a deodorizing composition prepared by adding activated carbon powder to a strong metal salt aqueous solution.

[Conventional technology]

Removal of bad odors is one means of improving the living environment, and various methods have been taken. The most efficient method is to bring the deodorizer into direct contact with the source of the bad odor, such as an aqueous solution type deodorizer that is sprayed directly onto sewage, kitchen waste, livestock sheds, etc.

Currently, the most commonly used deodorizers of this type are aqueous solutions of strong metal salts.For example, ferrous sulfate aqueous solutions are used for urine treatment and quickly remove ammonia and amine odors.

[Problem that the invention seeks to solve]

Nitrogen compounds such as ammonia and amines are present in high concentrations among the foul-smelling gases generated in normal living environments.

These nitrogen compounds are reactive with aqueous solutions of sulfates, nitrates or chlorides of aluminum, copper, magnesium, zinc and nickel, as well as ferrous sulfate, and can be removed thereby.

However, in addition to the above-mentioned nitrogen compounds such as ammonia and amines, substances that cause bad odors include hydrogen sulfide, sulfur compounds such as mercaptans, formaldehyde, phenols, etc.
and skatole, as well as other less common trace elements. The above-mentioned strong metal salts have excellent ability to remove alkaline substances such as ammonia and amines, but their deodorizing effect is weak against acidic to neutral substances, and as a result, they cannot completely remove bad odors such as sludge. .

Note that the above-mentioned strong metal salt aqueous solutions are generally acidic, but some solutions that have been adjusted to a neutral range by adding alkali to them exhibit the ability to remove sulfur compounds; Since some metal salts may generate precipitates, this method requires selection regarding the type of metal salt.

[Means for solving problems]

The present inventors have found that a strong metal salt aqueous solution to which activated carbon powder is added exhibits a wide range of malodorous gas removal ability and is useful as a deodorizing composition, and have completed the present invention.

The strong metal salts used in the present invention include sulfates of divalent iron, trivalent iron, aluminum, copper, zinc or magnesium;
Nitrates or chlorides are widely mentioned.

Usually, aqueous deodorizers containing strong metal salts as active ingredients contain 0.5 to 25% by weight of strong metal salts, whereas activated carbon powder contains 1 to 20% by weight based on the total amount of the composition. It is appropriate to add it in a certain proportion. In this case, it is preferable to set the particle size of the activated carbon powder to 10 to 50 .mu.m, since this allows the use of a spray type and provides a rapid deodorizing effect.

In the composition of the present invention, adding 0.1 to 5% by weight of a surfactant, particularly a nonionic active agent, has the effect of improving the dispersion and suspension properties of the activated carbon fine powder and preventing precipitation of metal salts. .

〔Effect of the invention〕

For direct spray type deodorizers, quick-acting is generally more important than durability. In particular, when used in the spray method, the effective ingredients of the deodorizer come into contact with the foul-smelling gas more efficiently, so particularly rapid effectiveness can be expected. In general, the reaction rate of inorganic compounds is high, so it can be said that deodorizers containing reactive inorganic compounds as active ingredients are suitable for spray-type deodorization.

On the other hand, the deodorizing mechanism of activated carbon is an adsorption type, and its deodorization speed is slower than that of a reactive type, but the deodorization is long lasting.

The purpose of making activated carbon into fine powder is to make it suitable for dispersion, but it also increases the specific surface area, resulting in a considerably high adsorption rate.

As described above, since the deodorizing composition of the present invention has activated carbon powder added to the strong metal salt aqueous solution, it can widely eliminate bad odors caused by nitrogen compounds such as ammonia and amines, as well as bad odors caused by sulfur compounds and other trace components. It is extremely useful because it can be removed and has both the fast-acting properties required of a spray-type deodorizer and a certain degree of sustainability.

In addition, when a strong metal salt is used as a deodorizing inorganic compound, there is a specific coloration, and the spraying liquid may leave colored stains on the surrounding area and on the clothes of the worker. In this case, the color of the solution immediately after being sprayed is not very dark and is not noticeable, but after losing most of the water at the place where it adheres, a portion of it is oxidized and becomes noticeably colored. Examples of substances that exhibit this behavior include copper salts and iron salts. These deposits can be easily removed by washing with water immediately after they are deposited.

However, when dried and oxidized, it often turns into an insoluble compound that is not easily removed by washing.

Since the composition of the present invention contains activated carbon, it has the advantage that it is easy to identify the spots where the particles have adhered, and by washing them before they dry, they can be removed without leaving any stains.

〔Example〕

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

Example 1 and Comparative Example 1 A deodorizing liquid for spraying was prepared with the following composition.

Deodorizing liquid A (comparative product): 1% aqueous solution of ferrous sulfate heptahydrate Deodorizing liquid B (inventive product): Deodorizing liquid A with surfactant (polyoxyethylene sorbitan monolaurate B = 16.7) 5 % powder activated carbon (300
Added 5% of Messhiyupas).

In deodorizing solution B, no precipitation of iron sulfate was observed. The activated carbon particles were also easily dispersed uniformly when shaken before use.

Next, approximately 2 cc of each of the two were sprayed from above the toilet tank of a pump-type toilet, and the following results were obtained.

Deodorizing liquid A: Immediately after spraying, the odor was significantly reduced for several tens of minutes.

Deodorizing liquid B: The bad odor was significantly reduced for 2 to 4 hours immediately after spraying.

Claims (1)

[Scope of Claims] 1. A deodorizing composition comprising activated carbon powder added to an aqueous solution of a strong metal salt. 2. The deodorizing composition according to claim 1, wherein the activated carbon powder is added in an amount of 1 to 20% by weight based on the total amount of the composition, and is present in a suspended state in the strong metal salt aqueous solution. 3 Strong metal salts include divalent iron, trivalent iron, aluminum, copper,
The deodorizing composition according to claim 1, which is a sulfate, nitrate or chloride of zinc or magnesium.