FR2748210A1 - Deodorising composition for use e.g. as an air or refrigerator freshener - Google Patents

Abstract

Deodoriser comprises at least one component selected from the plant extracts of oak leaves of Quercus dentata Thunb, Quercus dentata Thunb var. erectosquamasa Nakai, Quercus dentata Thunb var. glandifolia Koidzuki and Quercus dentata Thunb var. fallax Nakai, persimmon leaves of Disopyros kaki L. F. and whole grass of Isodon japonicus Hara and Isodon glaucocalyx (Maxim.) Kado, optionally extracted using an extraction solvent.

Description

DEODORIZING AGENT CONTAINING EXTRACTS FROM
PLANTS AS ACTIVE INGREDIENT
The present invention relates to a deodorant agent containing plant extracts as an active ingredient thereof.

More particularly, the present invention relates to various forms of deodorizing agent containing at least one component selected from the group consisting of plant extracts of oak leaves, ie, Quercus dentata Thunb, Quercus dentata Thunb var .

Erectrosquamasa Nakai, of Quercus dentata Thunb var. Glandifolia
Koidzuki, and Quercus dentata Thunb var. Fallax Nakai, persimmon leaves, ie Disopyros khaki LF, and whole grass of Isodon japonicus Hara, and lsodon glaucocalvx (Maxim.) Kado, as an active ingredient of the one -this.

 Various aggressive odors are generated in the industrial sector, such as factories, and in populated areas, ie at home and at the office, and this leads to ongoing studies to provide effective deodorants that can eliminate such aggressive odors, so to create a more comfortable living environment.

 To date, physical and chemical treatment methods have been employed to eliminate various unpleasant odors.

 As a chemical method of deodorization, mention may be made of rinsing with water, cooling, or adsorption. In general, the methods of water rinsing and cooling are not widely used because large quantities of water and large equipment are required to implement these methods. The adsorption method making use of the adsorption power of an absorbent such as activated carbon, also has the disadvantage that the aggressive odors are re-released from the adsorbent after being adsorbed therein.

 Moreover, there may be mentioned as chemical deodorization method, a method of treatment or masking by a chemical agent. The chemical treatment is carried out by washing with an acid or a base, to deodorize aggressive odors, but the odors that can be eliminated by this method, are limited, and more, the caution is required when implementing these agents. Another disadvantage is having to use in this method, a large device. The masking method produces a deodorizing effect by masking aggressive odors by the scent of the deodorant itself. However, even the scent of deodorant often causes consumer disgust, and moreover, the problem is that aggressive odors can not be radically eliminated by this method.

 Several deodorizing agents that can eliminate aggressive odors in simple and effective ways have been developed and marketed. But the smells in question. able to be eliminated by these deodorants are limited. and there is a serious problem that the deodorant components may be toxic to humans since most of the active ingredients of these deodorants are artificially synthesized compounds.

 As a result, there are many studies actively conducted to provide safe deodorants, containing a natural substance. In this context, the representative prior art is as follows.

 Japanese Patent Publication Laid-open 91-61457 proposes a deodorant agent comprising a juice from immature persimmon compressed by means of a compressor, a juice freed of sugary components by fermentation of said juice for about six months, during which the juice is stored in sealed form, or a dehydrated concentrate obtained by dehydration of said juice under reduced pressure, and a formulation adjuvant.

 Although safety and a good deodorant effect are both provided by the deodorizing agent mentioned above, its preparation is somewhat complex and time consuming. In particular, there is a serious problem that large quantities of components other than the deodorizing agent are included in the deodorizing agent obtained, because the compression is effected by means of a compressor, and moreover, because of the coloring coming from the juice itself, its use against various aggressive odors is limited. Another problem is, that its wording and difficult.

The present inventors have made intensive research to develop an agent which provides the solution of the problems mentioned above, and they have found that a deodorant agent containing as active ingredient at least one component selected from the group comprising vegetable extracts from leaves of
Quercus dentata Thunb var. Erectrosquamasa Nakai, of Quercus dentata Thunb var. Glandifolia Koidzuki, and Qzlercus dentata Thunb var. Fallax Nakai, Disopyros persimmon leaves LF, and whole grass of Isodon japonicus Hara, and Isodon gtaucoca4vx (Maxim.) Kado, as an active ingredient obtained by solvent extraction, has excellent deodorizing ability . These plants are edible, and so they have been used for a very long time as food products in Korea, China, and Japan. The measurement of its deodorant power reveals that the deodorizing agent according to the present invention has excellent deodorizing effects. The composition according to the present invention is safe, and it can be prepared economically.

 Accordingly, an object of the present invention is to provide a deodorizing agent having excellent deodorizing effects against various unpleasant odors, and which can be prepared by a simple and economical method.

 Another object of the present invention is to provide a diversified deodorant agent in formulation and degree of coloring, which is suitable for various uses, and forms of products meeting the requirements of the consumer.

According to the present invention, there is provided a deodorizing agent containing as active ingredient at least one component selected from the group consisting of plant extracts from leaves of Quercus dentata Thunb var. Erectrosqitamasa
Nakai, from Quercus dentata Thunb var. Glandifolia Koidzuki, and
Quercus dentata Thunb var. Fallax Nakai of leaves of Disopyros olive
LF, and whole grass of lsodon japonicus Hara, and lsodon glaucocalyx (Maxim.) Kado, which active ingredient is obtained by solvent extraction.

 As extraction solvent used to extract the plant extracts mentioned above, mention may be made of water, and the mixture of water and a hydrophilic organic solvent, such as methanol and ethanol.

 The aforementioned plants may be subjected to a rinsing, drying, and grinding treatment, if necessary.

Optionally, pretreatment of decolorization of the plant by addition of an extraction solvent such as water, or a mixture of water and methanol or ethanol, may be carried out additionally. In this case the deodorizing agent is preferably prepared by adding to the plant extracts, a phosphate salt such as sodium phosphate dibasic, and calcium chloride, followed by filtration.

 In addition to the aforementioned solvent extraction pretreatment, various methods can be envisioned for producing a bleached deodorizing agent. For example, a method involving the addition of active carbon or activated carbon, followed by filtration, or a method using a column of ion exchange resins, or adsorption resins, is preferably employed.

 According to the present invention, the liquid extracts obtained by the method mentioned above can be used as such, as a deodorizing agent. However, the deodorant agent according to the present invention can be formulated in various presentations, such as that of spray type, gel type, or granulated type. A spray-type deodorizing agent may be prepared by adding to the above-mentioned plant extracts, water, and a polyvalent alcohol such as propylene glycol to obtain an antidispersive or preservative effect, and an organic acid, such as citric acid, to enhance the deodorant effect against odors from nitrogen products, or small amounts of perfume. A gel-type deodorizing agent is prepared by adding to the above-mentioned plant extracts a gelling agent, and likewise a granular-type deodorizing agent is prepared by adding to the plant extracts mentioned above a porous vehicle, such as active carbon; and bentonite.

 A better understanding of the present invention may be obtained in light of the following Examples which are given by way of illustration, but which are not to be construed as limiting the present invention.

Example 1
1.5 liter of water was added to 15 g of oak leaves which had been rinsed, dried, and milled, and the resulting mixture was refluxed for 8 hours, followed by extraction and filtration. to obtain a liquid deodorant agent.

Example 2
In the same manner as in Example 1, except that persimmon leaves were used instead of oak leaves, a liquid deodorizing agent was obtained.

Example 3
In the same manner as in Example 1, except that Isodon japonicus Hara or lsodon glaucocalyx (Maxim.) Kado whole was used instead of oak leaves, a deodorizing agent was obtained liquid.

Example 4
50 ml of persimmon leaf extracts of Example 2, and 50 ml of whole grass extracts of Isodon japonicus Hara or lsodon glaucocalyx (Maxim.) Kado of Example 3 were added to 100 ml. ml of oak leaf extracts of Example 1, and all was homogeneously mixed to give a liquid deodorizing agent.

Example 5
I liter of water / ethanol mixture (1 v / lv) was poured onto 100 g of oak leaves which had been rinsed, dried and crushed, and the mixture obtained was heated at reflux for 4 hours, then extracted and filtration was performed to give a liquid deodorizing agent.

Example 6
In the same manner as in Example 5, except that persimmon leaves were used instead of oak leaves, a liquid deodorizing agent was obtained.

Example 7
In the same manner as in Example 5, except that Isodon japonicus Hara or lsodon glaucocalyx (Maxim.) Kado whole was used instead of oak leaves, a deodorizing agent was obtained liquid.

Examples 8 to 10
In the same manner as in Example 5, except that a water / ethanol mixture (1 v / lv) was used as the extraction solvent, a liquid deodorizing agent was obtained.

Example 11
50 ml of persimmon leaf extracts of Example 6, and 10 ml of whole grass extracts of Isodon japonicus Hara or Isodon glaucocalyx (Maxim.) Kado of Example 7 were added to 100 ml of oak leaf extracts of Example 5, and all was homogeneously mixed to give a liquid deodorizing agent.

Example 12
To 160 ml of a liquid deodorant obtained in Example 11 was added 840 ml of water, 2% by weight of propylene glycol, 0.25% by weight of citric acid. and 0.5% by weight, sodium citrate, and a small amount of perfume, and the whole was homogeneously mixed to give a spray-type deodorizing agent. Percentages by weight are based on the total weight of water and deodorizing agent.

Example 13
50 ml of persimmon leaf extracts of Example 9, and 10 ml of whole grass extracts of lsodon japonicus Hara or lsodon glaucocalyx (Maxim.) Kado of Example 10 were added to 100 ml of oak leaf extracts of Example 8, and all was homogeneously mixed to give a liquid deodorizing agent.

Example 14
In the same manner as in Example 12, except that the liquid deodorant of Example 13 was used, a spray-type deodorizing agent was obtained.

Example 15
60 ml of persimmon leaf extracts of Example 6, and 40 ml of whole grass extracts of lsodon japoniczls Hara or lsodon glaucocalyx (Maxim.) Kado of Example 7, were mixed with 100 ml of oak leaf extracts of Example 5 to give a liquid deodorant. To 200 ml of the liquid deodorant obtained was added 800 ml of water, and 100 ml of propylene glycol, and as auxiliary additives, 5% by weight of carrageenan, 1% by weight of vitamin C and 1% by weight of citric acid based on the total amount of the mixture were added to give a gel-type deodorizing agent.

Example 16
To a mixture obtained by adding 100 g of activated charcoal, and 200 g of bentonite to 100 ml of a deodorizing agent of Example 11, was added 0.5% by weight based on the total weight of the mixture. , vitamin C, and all was mixed homogeneously to give a granular deodorizing agent.

Example 17
To 100 g of oak leaves which had been rinsed, dried, and milled, 1,400 ml of water were added, and the mixture was pretreated at 40 ° C for 4 hours to give discolored oak leaves. of these discolored leaves, a liquid deodorizing agent was obtained in the same manner as in Example 5.

Example 18
To 100 g of persimmon leaves which had been rinsed, dried, and milled, 1,400 ml of water was added, and the mixture was pretreated at 500 ° C. for 4 hours to give discolored persimmon leaves. From these discolored leaves, a liquid deodorizing agent was prepared in the same manner as in Example 6.

Example 19
The deodorant agent obtained from oak leaves as in Example 17, that obtained from persimmon leaves as in Example 18, and that obtained from whole grass of Isodon japonicus Hara or dodon gtaucocatyx (Maxim.)
Kado as in Example 18, were mixed together. From this mixture, a spray-type deodorizing agent was prepared in the same manner as in Example 12.

Example 20
To a deodorant agent obtained from oak leaves as in Example 17, and to that obtained from persimmon leaves as in Example 18, 0.5% by weight of sodium phosphate was added respectively. dibasic sodium, and 2% by weight, calcium chloride, and it was further added to this, a deodorant agent obtained from whole grass of lsodon japonicus Hara or lodon glaucocatyx (Maxim.) Kado as in Example 7. From the resulting mixture, a spray-type deodorant was prepared in the same manner as in Example 12.

Example 21
15% by weight of activated carbon was added to a deodorizing agent obtained from oak leaves as in Example 5, and then the mixture was filtered to prepare a liquid deodorizing agent.

Example 22
20% by weight of activated charcoal was added to a deodorizing agent obtained from persimmon leaves as in Example 6, and then the mixture was filtered to prepare a liquid deodorizing agent.

Example 23
10% by weight of activated charcoal was added to a deodorizing agent obtained from whole grass of lsodon japonicus Hara or lodon glaucocalyx (Maxim.) Kado as in Example 7, and then the mixture filtered to prepare a liquid deodorant.

Examples 24 to 27
To a deodorizing agent of Example 11, 10%, by weight, 15% by weight, 20% by weight, and 25% by weight of activated carbon were added, respectively. Each of the mixtures was filtered to give each a liquid deodorizing agent.

Example 28
A liquid deodorant agent obtained from oak leaves as in Example 5 was passed sequentially through a column of cation exchange resins (strong acid), and then through a column of anion exchange resins (base low) to give a liquid deodorant.

Examples 29 and 30
Each of the liquid deodorizing agents obtained from persimmon leaves as in Example 6, and from whole grass of Isodon japonicus Hara or lodon glaucocalyx (Maxim.)
Kado as in Example 7, was passed sequentially through a column of cation exchange resins (strong acid), and then through a column of anion exchange resins (weak base), to give, respectively, an agent liquid deodorant.

Example 31
A liquid deodorizing agent was obtained in the same manner as in Example 11, except that the liquid deodorizing agents of Examples 28, 29, and 30 were used.

Example 32
A spray-type deodorant was obtained in the same manner as in Example 12 except that the deodorizing agent of Example 31 was used.

Example 33
A liquid deodorizing agent was obtained in the same manner as in Example 28, except that the deodorizing agent of Example 11 was used.

Example 34
A spray deodorant was prepared in the same manner as in Example 12, except that the deodorizing agent of Example 33 was used.

Example 35
A liquid deodorant agent was obtained by passing the deodorant agent of Example 11 through a column of anion exchange resins (strong base).

Example 36
In the same manner as in Example 12, except that the liquid deodorizing agent of Example 35 was used, a liquid deodorizing agent was prepared.

Example 37
A liquid deodorant agent was prepared by passing the deodorant agent of Example 11 through a column of adsorption resins.

Example 38
A spray-type deodorant was prepared in the same manner as in Example 12 except that the liquid deodorant agent of Example 37 was used.

Experimental example 1
From the deodorant agents from the Examples mentioned above, the color was measured using a color difference meter. Clarity (L), intensity of red color (a), intensity of yellow color (b), and SE represented by the following equation are given in Table 1, SE = (L-L ') 2 + (a-a ') 2 + (bb') 2 in which, L, a, and b, respectively represent the clarity, the red intensity, and the yellow color intensity, the deodorizing agents of the Examples 5, 6, 7, 11, and 12 which have been selected as reference materials. The, a ', and b' respectively represent the clarity, the red intensity, and the yellow color intensity of the deodorizing agents obtained in the Examples other than those mentioned above.

 Table 1 indicates that deodorizing agents that have been pretreated by solvent extraction, sodium phosphate, and calcium chloride, activated carbon ion exchange resins, or adsorption resins, have lighter colors than those deodorizing agents that have not been subjected to such pretreatment. In particular, activated carbon and ion exchange resin treatments have emerged as the most effective.

Table 1: Results of color measurements

<tb> Example <SEP> n <SEP> L <SEP> a <SEP> b <SEP> AE
<tb><SEP> 5 <SEP> 26.04 <SEP> 36.37 <SE> 44.81
<tb><SEP> 6 <SEP> 15.69 <SEP> 41.59 <SEP> 26.67
<tb><SEP> 7 <SEP> 18.76 <SEP> 22.11 <SEP> 22.19
<tb><SEP> 11 <SEP> 24.22 <SEP> 27.39 <SE> 41.60 <SEP>
<tb><SEP> 12 <SEP> 84.50 <SEP> 20.00 <SE> 83.96
<tb><SEP> 17 <SEP> 50.38 <SEP> 34.41 <SEP> 81.79 <SE> 44.32 <SEP>
<tb><SEP> 18 <SEP> 22.65 <SEP> 35.39 <SEP> 38.97 <SEP> 15.52
<tb><SEP> 19 <SEP> 70.01 <SEP> 10.43 <SEP> 62.06 <SEP> 27.85
<tb><SEP> 20 <SEP> 88.44 <SEP> - <SEP> 0.24 <SEP> 36.94 <SEP> 51.34
<tb><SEP> 21 <SEP> 89.32 <SEP> - <SEP> 1.78 <SEP> 10.26 <SEP> 81.57
<tb><SEP> 22 <SEP> 99.00 <SEP> -0.24 <SEP> 1.14 <SEP> 96.83
<tb><SEP> 23 <SEP> 94.65 <SEP> -2.26 <SEP> 23.54 <SEP> 80.18
<tb><SEP> 24 <SEP> 68.27 <SEP> 18.03 <SE> 77.61 <SE> 57.65
<tb><SEP> 25 <SEP> 81.24 <SEP> 2.43 <SEP> 51.85 <SEP> 63.07
<tb><SEP> 26 <SEP> 91.11 <SEP> -2.42 <SEP> 30.61 <SEP> 74.04
<tb><SEP> 27 <SEP> 95.36 <SEP> - <SEP> 2.73 <SEP> 20.00 <SEP> 80.21
<tb><SEP> 28 <SEP> 91.58 <SEP> - <SEP> 1.37 <SEP> 27.99 <SEP> 77.48
<tb><SEP> 29 <SEP> 85.76 <SEP> 3.02 <SEP> 12.32 <SEP> 81.44
<tb><SEP> 30 <SEP> 96.31 <SEP> -2.16 <SEP> 11.40 <SEP> 83.87
<tb><SEP> 33 <SEP> 90.23 <SEP> -0.01 <SEP> 33.32 <SEP> 71.94
<tb><SEP> 34 <SEP> 97.59 <SEP> -0.62 <SEP> 7.22 <SEP> 80.53
<tb><SEP> 35 <SEP> 39.78 <SEP> 29.44 <SEP> 66.57 <SEP> 29.50
<tb><SEP> 36 <SEP> 72.72 <SEP> 8.96 <SEP> 56.13 <SEP> 33.91
<tb><SEP> 37 <SEP> 54.24 <SEP> 36.14 <SEP> 87.50 <SEP> 55.63
<tb><SEP> 38 <SEP> 87.28 <SEP> 1.50 <SEP> 39.80 <SEP> 47.96
<Tb>
Experimental example 2
The deodorant effect of the deodorizing agents according to the present invention on ammonia was evaluated as follows: ml or 1 mg of one of the deodorizing agents of Examples I to 38, was placed in a container containing 0 , 1 ml of a 25% ammonia solution, and the container was sealed, and kept in a water bath at 30 C for 10 minutes. The gas from the container was sampled, and the ammonia content was measured by vapor phase chromatography. As a control, 1 ml of distilled water was used instead of the deodorizing agent. The efficiency in the removal was calculated according to the following equation, and the results are shown in Table 2.

Efficiency in the removal of NH3 (%) =
[(Control NH3 peak area) - (NH3 peak area of Example)] x 100
Sample NH3 peak area
Table 2: Effectiveness in ammonia removal

<tb> Example <SEP> No <SEP> Efficiency <SEP> | <SEP><SEP> Example <SEP> n <SEP> Effectiveness
<tb><SEP> of elimination <SEP> (%) <SEP> of elimination <SEP> (%)
<tb><SEP> Control <SEP> 0 <SEP> 16 <SEP> 100
<tb><SEP> 1 <SEP> 100 <SEP> 19 <SEP> 100
<tb><SEP> 2 <SEP> 100 <SEP> 20 <SEP> 100
<tb><SEP> 3 <SEP> 100 <SEP> 24 <SEP> 92.15 <SEP>
<tb><SEP> 4 <SEP> 100 <SEP> 33 <SEP> 100
<tb><SEP> 11 <SEP> 100 <SEP> 34 <SEP> 100
<tb><SEP> 12 <SEP> 100 <SEP> 35 <SEP> 100
<tb><SEP> 13 <SEP> 100 <SEP> 36 <SEP> 100
<tb><SEP> 14 <SEP> 100 <SEP> 37 <SEP> 100
<tb><SEP> 15 <SEP> 100 <SEP> 38 <SEP> / <SEP> 100
<Tb>
Experimental example 3
The deodorant effect of the deodorant agents according to the present invention on trimethylamine was evaluated in the same manner as in Experimental Example 2 mentioned above, except that a 25% trimethylamine solution was used instead. ammonia. The efficiency in the removal of trimethylamine is shown in Table 3.

Table 3: Efficacy in the elimination of trimethylamine

<tb> Example <SEP> n <SEP><SEP> Efficiency <SEP> Example <SEP> n0 <SEP> Efficiency
<tb><SEP> of elimination <SEP> (%) <SEP> of elimination <SEP> (%)
<tb><SEP> 1 <SEP> 51.20 <SEP> 23 <SEP> 12.57
<tb><SEP> 2 <SEP> 44.90 <SEP> 24 <SEP> 34.24
<tb><SEP> 3 <SEP> 33.30 <SEP> 25 <SEP> 25.75
<tb><SEP> 4 <SEP> 43.80 <SEP> 26 <SEP> 18.96
<tb><SEP> 5 <SEP> 78.86 <SEP> 27 <SEP> 17.77
<tb><SEP> 6 <SEP> 100 <SEP> 28 <SEP> 50.37 <SEP>
<tb><SEP> 7 <SEP> 84.29 <SEP> 29 <SEP> 58.10
<tb><SEP> 11 <SEP> 100 <SEP> 30 <SEP> 59.47 <SEP>
<tb><SEP> 12 <SEP> 83.38 <SEP> 33 <SEP> 66.10
<tb><SEP> 17 <SEP> 78.16 <SEP> 34 <SEP> 49.88
<tb><SEP> 18 <SEP> 90.10 <SEP> 35 <SEP> 94.78
<tb><SEP> 19 <SEP> 80.43 <SEP> 36 <SEP> 94.76
<tb><SEP> 20 <SEP> 78.56 <SEP> 37 <SEP> 97.48
<tb><SEP> 21 <SEP> 10.22 <SEP> 38 <SEP> 92.12
<tb><SEP> 22 <SEP> 19.34
<Tb>
Experimental examples 4 and 5
The deodorant effect of the deodorizing agents according to the present invention, with respect to the Kimchee odor, or the smell of garlic, was evaluated as follows: 1 ml or 1 mg of one deodorizing agents according to the present invention, was placed in containers respectively containing 1 g of Kimchee and 1 g of garlic, and the containers were sealed, and maintained at room temperature for 1 hour. The containers were then opened, and the intensity of the odor was evaluated organoleptically by a panel of experts composed of 10 members. Based on the odor intensity of Kimchee and garlic, the sensory evaluation was based on 10 points for a very strong odor and 0 points for no odor. The results are shown in Table 4.

Table 4: Deodorizing effect on Kimchee and garlic odors

<tb> Example <SEP> n <SEP> Intensity <SEP> of <SEP> smell
<tb><SEP> Kimchee <SEP> | <SEP> Garlic
<tb><SEP> Control <SEP> 8.72 <SEP> 9.12
<tb><SEP> 11 <SEP> 1.50 <SEP> 2.50
<tb><SEP> 12 <SEP> 2.00 <SEP> 2.88
<tb><SEP> 13 <SEP> 2.10 <SEP> 2.61
<tb><SEP> 14 <SEP> 2.21 <SEP> 2.69 <SEP>
<tb><SEP> 15 <SEP> 1.02 <SEP> 1.57
<tb><SEP> 16 <SEP> 3,12 <SEP> 2.87 <SEP>
<tb><SEP> 19 <SEP> 1.58 <SE> 2.45 <SEP>
<tb><SEP> 20 <SEP> 1.61 <SEP> 2.44
<tb><SEP> 25 <SEP> 5.79 <SE> 4.82
<tb><SEP> 34 <SEP> 1.79 <SEP> 2.62
<tb><SEP> 38 <SEP> 1.68 <SEP> 2.46
<Tb>
As can be seen from the results of Tables 1 to 4, the deodorant agents according to the present invention containing plant extracts as an active ingredient are safe and exhibit excellent deodorizing effect over a broad spectrum. aggressive odors.

 In addition, since the deodorizing agents according to the present invention can be formulated in different formulations, with various coloring and deodorizing effects, they can be formulated into formulations suitable for a particular application, use and product form.

 The deodorant agents according to the present invention can be used in domestic use, for example as an indoor air freshener, or as a deodorizer for refrigerators, as well as for the deodorization against aggressive odors due to beverages or foodstuffs. . Similarly, they can be used effectively in the improvement of environmental conditions, such as the elimination of various aggressive odors generated during the treatment of excrement, sewage, or emitted by factories.

Claims (9)

 1. Deodorant agent containing as active ingredient, at least one component selected from the group comprising plant extracts of leaves of Quercus dentata Thunb, Quercus dentata Thunb var. Erectrosquamasa Nakai, of Quercus dentata Thunb var. Hara, and Isodon glaucocalyx (Maxim.) Kado, which were extracted by solvent extraction.  Glandifolia Koidzuki, and Quercus dentata Thunb var. Fallax Nakai, leaves of Disopyros khaki L.F., and whole grass of lsodonjaponlcus  2. The deodorant agent according to claim 1, wherein the extraction solvent is selected from the group consisting of water, a mixture of water and methanol, and a mixture of water and ethanol.  3. Deodorant agent according to claim 1, wherein the plant is decolorized by pretreatment by extraction with a solvent comprising water, a mixture of water and methanol, or ethanol.  4. The deodorant agent according to claim 3, wherein the plant extracts which have been treated by a solvent extraction are subjected to another treatment comprising the addition of phosphate and calcium chloride, followed by filtration. .  5. Deodorant agent according to claim 1, wherein the plant extracts are further treated by addition of activated carbon followed by filtration.  6. The deodorizing agent of claim 1, wherein the plant extracts are further treated by passing through a column of ion exchange resins, or on a column of adsorption resins.  The deodorant agent according to claim 1, wherein water, a polyvalent alcohol, an organic acid, and a small amount of perfume are added to the plant extracts to prepare a spray-type deodorizing agent.  8. Deodorant agent according to claim 1, wherein a gelling agent is added to the plant extracts, to prepare a gel deodorant agent.  9. A deodorizing agent according to claim 1, wherein a porous vehicle is added to the plant extracts to prepare a granular deodorant agent.