JPS61213052A - Deodorant - 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 (Industrial Field of Application) The present invention relates to a deodorizing agent suitable for use particularly as a deodorizing agent for refrigerators or freezers.

(Prior art) Malodorous components generated in refrigerators and freezers for food preservation include sulfur-containing acidic substances such as hydrogen sulfide and mercaptan, neutral substances such as dimethyl sulfide, and nitrogen-containing alkaline substances such as ammonia and trimethylamine. Can be mentioned.

A method of adsorbing and removing malodorous components in gases using activated carbon has been known for some time.Ordinary activated carbon adsorbs neutral substances and neutral substances among the above-mentioned malodorous components, but it does not absorb alkaline substances such as ammonia. Since it hardly adsorbs lower amines and lower amines, it tends to be unable to completely adsorb and remove the above-mentioned malodorous components.

In addition, it is not possible to tell from the appearance of activated carbon whether the adsorption amount of bad odors has reached the saturated level. Therefore, users often end up replacing it too soon or with unlucky circumstances, and may not be able to continue using it. It was inconvenient to do so.

(Problems to be Solved by the Invention) The present invention solves the drawbacks Kj1 of the above-mentioned conventional deodorizing agent made of activated carbon.
It has excellent deodorizing power against bad odors generated in refrigerated cars and freezers, regardless of whether the odor component is rutted, and the effective life can be determined from the appearance when it is time to replace it. It is an object of the present invention to provide a deodorizing agent that can be determined as to whether it is contaminated or not.

(Means for Solving the Problems) The deodorizer of the present invention is made of activated carbon and an ion exchange resin,
It is a combination of a deodorizing body obtained by holding one or both of these on a carrier, if necessary, and an indicator that indicates the useful life of the deodorizing body.

The activated carbon is not particularly specified as long as it has a function of adsorbing and removing malodorous components, and may be either powdered activated carbon or granulated activated carbon. Internal specific surface area is usually 100-30G
Onf/f approximately, preferably 800-1600m'/
It is said to be about P.

Hydrogen sulfide, mercaptan, and the like are widely used as such activated carbon, and specific examples of the ion exchange group include phenolic hydroxyl group, carboxyl group, and sulfo group. Incidentally, the cation exchange resin in the present invention includes an amphoteric ion exchange resin having cation exchange ability.

By neutralizing the ion exchange resin, such as I15, malodorous components such as ammonia and lower amines, which are hardly removed by ordinary activated carbon, can be removed.

For use, the dogs are usually held on a carrier such as a polyurethane foam sheet, but in some cases the particles may be used in a state in which they are attached to each other.

Examples of indicators that indicate the useful life of a deodorizing body include the following.

First, understand the approximate effective lifespan of a deodorizer placed in a refrigerated car etc. containing foodstuffs, and remove it from water containing a solvent that can volatilize during refrigeration, agar or acid gelatin. gel-like indicator (contains colorants and preservatives if necessary)
Adjust. At this time, the period during which most of the volatile matter in the indicator evaporates and the volume of the indicator decreases significantly is set to k, which is approximately the same as the effective life of the deodorizing element. There is a length of 2 meters per diaphragm.

For refrigerator or freezer deodorizers, the solvent is
From the viewpoint of volatility and safety, ethanol, Example 1 4f of finely powdered activated carbon was added to a polyurethane foam sheet (86
x60 x 5%), and then 34 x 60 This was used as Zemple A (composite sheet).

2 impregnated sheet, activated carbon 4y impregnated sheet, and blank (polyurethane foam only) were prepared and sample B%C% was prepared respectively.
D, L, Ri.

Next, Sample A was placed in a polyethylene tank with a capacity of 2゜L containing 50 ppm of hydrogen sulfide and left at a temperature of 20°C. A hole with a diameter of 1 aa was made in the side of the tank, a gas detection tube (manufactured by Gastic) was inserted, and the hydrogen sulfide concentration was measured. Measurements were similarly made after 1 hour, 2 hours, and 24 hours, and the removal rate of hydrogen sulfide gas was calculated.

Next, similar measurements were performed using samples B, C, and D.

The gas removal rate was as shown in Table 1.

Example 2 The deodorizing power was measured using each sample in the same manner as in Example 1 except that instead of using the nine containers containing 50 ppm of hydrogen sulfide in Example I, a container containing 200 ppm of ammonia was used. did. The results were as shown in Table 2.

Table 1 4! ! Table J2 Effects of the Invention As mentioned above, the deodorizing agent of the present invention has a K11m and has excellent deodorizing power against malodor components made of acidic, alkaline, and neutral substances, and its effective life can be easily determined from the appearance. It is extremely convenient to judge whether or not it is time to replace it.

Claims (1)

[Claims] 1. A deodorizing body consisting of activated carbon and a cation exchange resin, one or both of which is held on a carrier if necessary, and an indicator indicating the effective life of the deodorizing body. Deodorant with special features. 2. The deodorizer according to item 1, wherein the carrier is polyurethane foam. 3. The deodorizing agent according to item 1 or 2, which is used in a refrigerator. 4. The deodorizing agent according to item 1 or 2, which is used in a freezer.