JP2560067B2 - Deodorant - Google Patents

Description

TECHNICAL FIELD The present invention relates to a deodorant for effectively removing a sulfur compound among malodorous components.

[Conventional technology]

Examples of substances that cause an offensive odor include nitrogen-containing compounds such as ammonia and amines, sulfur-containing compounds such as hydrogen sulfide and mercaptans, and oxygen-containing compounds such as aldehydes. And to remove the stench,
It is known that it is effective to remove these causative substances by adsorption or decomposition. In addition, examples of commercially available deodorants used to remove such malodors include those that use activated carbon, those that use plant extracts, those that use iron ascorbic acid chelate, zeolite, and the like.

Of these, activated carbon removes malodorous components such as sulfur compounds by physical adsorption, but it has the drawback of adsorbing moisture in the air during use and drastically lowering the adsorption capacity. There is also a problem that the articles are easily contaminated. If a solid deodorant is obtained by blending with a synthetic resin or the like and molding it, not only the processing is difficult but also the performance is lowered.

In addition, the plant extract is suitable for spraying or spraying, but when it is supported on a film-like or fibrous carrier, it has the drawback that it deteriorates or volatilizes to reduce the deodorizing ability. Conventional deodorants such as acid chelates and zeolites have a weak point that they have a low deodorizing power for sulfur compounds.

[Problems to be solved]

In view of the fact that conventional deodorants are insufficient in deodorizing ability and ease of use against bad odors based on sulfur compounds, the present invention intends to provide a deodorant having excellent ability to trap sulfur compounds. To do.

[Means for solving the problem]

The present inventor has conducted extensive research to achieve the above-mentioned object, and as a result, a hydroxide or hydrous oxide of zirconium or a lanthanoid element reacts with a sulfur compound such as hydrogen sulfide to fix it. The present invention has been completed and the present invention has been completed.

That is, the deodorant of the present invention contains zirconium and cerium hydroxide or hydrous oxide as an active ingredient.

The hydroxide or hydrous oxide of zirconium or cerium, which is the active ingredient of the deodorant of the present invention, is neutralized by adding, for example, an aqueous alkali solution to an aqueous solution of a mineral acid salt containing these metal elements. It can be obtained by precipitation, which is obtained by filtration and washing with water.

The hydroxide thus obtained can be appropriately dried to remove the attached water, and part of the bound water can be desorbed to obtain a hydrous oxide. As a method for producing such a hydroxide or hydrous oxide, for example, Imai et al .: Journal of the Chemical Society of Japan 1987.
(5) Known methods described in 807 to 813 and the like can be used, but the method is not limited thereto.

The hydroxide or hydrous oxide containing zirconium and cerium can also be obtained by physically mixing the hydroxides or hydrous oxides of the single components, but a solution containing the respective metal elements is premixed. It is more preferable to use this to generate composite precipitation.

The hydroxide or hydrous oxide thus obtained can be used after crushing, sieving, etc., if necessary.

The deodorant of the present invention, the powder of the metal hydroxide or hydrous hydroxide obtained as described above as it is, or into a pellet form by tableting, etc., to be used by filling into a container etc. However, at this time, an appropriate binder may be used. Further, it may be mixed with a plastic binder to form an appropriate shape, for example, a film shape or a fibrous shape, or may be mixed with pulp or the like to make paper having deodorizing performance, or various binders or It is also possible to mix it with a solvent or the like and use it in the form of printing ink, paint or adhesive.

The deodorizing agent of the present invention may be used alone, but other types of deodorizing agents, for example, an adsorbing deodorizing agent such as activated carbon or a deodorizing agent of the condensed zirconium phosphate type which the applicant of the present invention has filed separately ( JP-A-62-112553), various other deodorizing agents and the like may be appropriately used in combination as long as they do not impair the function by reacting with the deodorizing agent of the present invention. With such combined use, a further excellent deodorizing effect can be expected.

[Work]

The deodorant of the present invention deodorizes bad odors caused by hydrogen sulfide, mercaptan and the like. This is because when such a sulfur compound comes into contact with a metal hydroxide or hydrous oxide which is a component of the deodorant of the present invention, -SH is generated by its ion exchange ability.
It is thought to be due to the conversion to S ^2- , which is adsorbed and fixed stoichiometrically, and this effect is maintained until the OH group in the metal hydroxide is replaced by another anion and disappears. .

On the other hand, when the deodorizing power is lost due to the adsorption of such anions, the deodorizing power can be regenerated by treating the deodorant of the present invention with a weak alkaline aqueous solution or the like.

It goes without saying that such deodorizing power is effective not only for gaseous malodorous components but also for components in liquid.

〔Example〕

Comparative Example A 5% aqueous solution of sodium hydroxide was gradually added while stirring a 7% aqueous solution of zirconium sulfate to form a precipitate of zirconium hydroxide. This product was allowed to stand overnight at room temperature, filtered off, thoroughly washed with deionized water, and air-dried at room temperature on a vat to give a slightly transparent white powder (Sample A).

Example 1 Zirconium oxychloride and cerium chloride were mixed with each other at a molar ratio of 1: 1.5 using an acidic hydrochloric acid solution, and a greenish yellow powdery zirconium-cerium composite was prepared by the same procedure as in Comparative Example. A hydroxide (Sample B) was obtained.

Evaluation test-1 Samples A and B, each of which was dried at 60 ° C. for 1 hour, were sealed in a vial having a capacity of 200 ml at room temperature. 1 to 4 ml of hydrogen sulfide gas was injected into this using a gas-tight syringe, left for 5 minutes at room temperature, and then 1 m of gas in the vial bottle.
l was sampled and the concentration of hydrogen sulfide was measured by gas chromatography.

Further, an empty vial bottle containing no deodorant was treated in the same manner to obtain the concentration of blank hydrogen sulfide, and from this, the removal rate was calculated by the following formula.

The results are shown in Table 1.

Evaluation test-2 In a vial prepared in the same manner as in evaluation test-1, separately prepared ethyl mercaptan vapor-saturated room temperature air 1 ml
Was injected using a gas-tight syringe, and the evaluation test-
The concentration of ethyl mercaptan was measured in the same manner as in 1, and the removal rate was calculated.

 The results are shown in Table 2.

Evaluation Test-3 Using the samples A and B heated at 100 ° C. or 150 ° C. for 1 hour, the hydrogen sulfide removal rate was obtained by the same method as in the evaluation test-1. Blank gas concentration 350ppm
The results are shown in Table 3.

Evaluation Test-4 Samples A and B were dried at 60 ° C for 1 hour and then at 22 ° C at 83
The sample was left to stand in a room of% RH for 24 hours to absorb moisture, and the removal rate of hydrogen sulfide was determined for these samples by the same method as in Evaluation Test-1. The results when the blank gas concentration was set to 350 ppm are shown in Table 4 in comparison with activated carbon.

[Effects of the Invention] The deodorant of the present invention can be used alone to adsorb and deodorize sulfur compounds such as hydrogen sulfide and mercaptans, and other deodorants such as nitrogen compounds such as amine and ammonia are often used. When used in combination with zirconium polyphosphate that adsorbs and deodorizes, it can also be used as a deodorant having a strong deodorizing performance regardless of the type of malodorous substance.

Further, since the deodorant of the present invention has a light color, it does not contaminate other articles and can be used for various purposes, and the physical properties of the deodorant even when it is compounded with a polymer substance and molded. There is a feature that deodorizing performance can be imparted to processed products without deteriorating.

Claims (1)

(57) [Claims] 1. A deodorant containing a hydroxide or hydrous oxide of zirconium and cerium as an active ingredient.