JPS61106161A - Solid 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] The present invention is directed to solid deodorizing compositions.

BACKGROUND ART Deodorizing agents comprising a combination of divalent iron salt and L-ascorbic acid have been known. This deodorizer.

It is usually used in the form of an aqueous solution, and when used in solid form, it is impregnated with a porous filler such as activated carbon. However, when a porous filler is impregnated with an aqueous solution and solidified, there are restrictions on the solubility of the divalent iron salt in water, and there are restrictions on the amount of the divalent iron salt impregnated. In addition to the problem of poor deodorizing ability per weight, since it is used in the form of an aqueous solution, there are problems in that water evaporates and the aqueous solution is susceptible to deterioration and deterioration during long-term storage or use.

The present invention aims to solve the above-mentioned problems found in conventional deodorizers.

That is, according to the present invention, there is provided a solid deodorizing composition based on a mixture of a divalent iron salt, an organic acid or its salt, and a filler.

Examples of divalent iron salts used in the present invention include sulfates, nitrates, halogenates (chlorides, bromides, iodides, etc.). This divalent iron salt contains divalent iron ions (Fe2
), and reacts with malodorous components,
Make this fixed.

The organic acid used in the present invention is
Any substance that can react with a valent iron salt to form a chelate may be used, such as L-ascorbic acid, erythorbic acid, citric acid, malic acid, maleic acid, fumaric acid, sorbic acid, Examples include various carboxylic acids such as acetic acid, propionic acid, adipic acid, benzoic acid, glycine, and glutamic acid, oxycarboxylic acids, and amino acids.

As the filler used in the present invention, conventionally known organic and inorganic fillers are used, such as activated carbon, zeolite, perlite, permuculite, diatomaceous earth, kaolin, loess, Magnesia, magnesium hydroxide, calcium hydroxide, alumina, silica, wood flour, clay, talc, acid clay, calcium sulfite, calcium carbonate, magnesium carbonate, dihydrite,
Examples include powders such as blast furnace slag and urea/formalin resin. Such fillers are used in the form of fine powder or a mixture of fine powder and coarse powder, and they exhibit a bulking effect, provide air permeability to the composition, and facilitate the reaction between divalent iron ions and malodorous components. It shows the effect of advancing the process.

The deodorizing composition of the present invention contains the above-described powders of divalent iron salt, organic acid or its salt, and filler as essential components, and a mixture containing these components or a molded product thereof includes:
Shows its deodorizing effect in the presence of moisture. That is, when a mixture of the above-mentioned components is placed in an atmosphere containing a lot of water vapor, water vapor permeates into the mixture, increases the water content in the mixture, and becomes suitable for the reaction between malodorous components and divalent iron ions. give conditions. However, this mixture does not exhibit a smooth deodorizing reaction in an atmosphere with little moisture or in a dry atmosphere, so in order to obtain a mixture that allows the deodorizing reaction to proceed smoothly,
Preferably, water is added to the mixture beforehand. This water can be added by adding and mixing an appropriate amount of water when mixing each component, but by adding water in advance to the filler, which is the mixed component, the filler containing this water can be added. Advantageously, it is mixed with other ingredients. In this case, the ratio of water added to the filler is within a range such that the surface of the filler is not substantially wetted with water, that is, below the saturated water absorption amount of the filler, in order to facilitate the mixing operation. Generally, it is suitable to use a filler containing 20 to 50% water content.

In addition, when adding this water, in order to prevent water evaporation, the added water may be a high boiling point water-soluble organic compound such as ethylene glycol, diethylene glycol, polyethylene glycol, glycerin, etc. as a drying inhibitor.
polyvinyl alcohol.

It is advantageous to use an aqueous solution prepared by mixing and dissolving an appropriate amount of a water-soluble polymer such as methoxycellulose, ethoxycellulose, carboxymethylcellulose, sodium alginate, or starch, or a water-soluble inorganic compound, especially a deliquescent substance as described later. .

According to the research of the present inventors, the above-mentioned divalent iron salt.

For mixtures consisting of organic acids or their salts and fillers,
It has been found that the addition of deliquescent substances provides highly advantageous deodorizing compositions.

That is, as described above, the divalent iron salt, the organic acid or its salt, and the filler used in the present invention are all used in solid form (powder form), and their mixture needs to be free of moisture to carry out the deodorizing reaction. The presence of water required for this deodorizing reaction can be secured by adding and mixing a deliquescent substance into the mixture in advance. Deliquescent substances have the property of absorbing moisture in the air and becoming an aqueous solution, and when a mixture containing this deliquescent substance is placed in the air,
It absorbs moisture from the air and starts a deodorizing reaction. Therefore,
This mixture containing a deliquescent substance can be stored stably for a long period of time by placing it in an airtight bag made of plastic or the like and shielding it from the outside air.When it is ready for use, it can be taken out of the bag and placed in a designated location. As a result, moisture can be absorbed from the air and a desired deodorizing reaction can be started.

The deliquescent substances used for the above purpose in the present invention include:
Examples of conventionally known substances include calcium chloride, magnesium chloride, iron chloride, aluminum chloride, potassium hydrogen sulfate, sodium hydrogen sulfate, bittern, and crude foods.

In the composition of the present invention, the proportion of each component to be used is not particularly limited, but is generally 0.01 to 2 parts by weight, preferably 0.01 to 2 parts by weight of an organic acid or salt thereof, per 1 part by weight of divalent iron salt. 1
~1 part by weight, filler 0.1-10 parts by weight, preferably 1
~5 parts by weight of the deliquescent substance.

The amount is about 1 to 5011% by weight, preferably about 5 to 30% by weight in the entire composition.

A pH adjuster can be added to the deodorizing composition of the present invention, if necessary. In other words, the deodorizing effect of divalent iron ions differs depending on the conditions (pi), and its reactivity towards malodorous components varies depending on the conditions. In this case, a solid acidic substance or an alkaline substance is used as the pH adjuster, and an organic acid as mentioned above is used as the acidic substance. On the other hand, alkaline substances include alkaline inorganic compounds such as sodium hydroxide, potassium hydroxide, calcium hydroxide, magnesium hydroxide, sodium carbonate, calcium carbonate, magnesium carbonate, potassium carbonate, sodium hydrogen carbonate, calcium oxide, magnesium, sodium peroxide,
Examples include hydroxides, carbonates, oxides, and peroxides of alkali metals and alkaline earth metals such as potassium peroxide and calcium peroxide. These pH adjusters can be used to adjust the desired P
It is added as appropriate depending on H.

The deodorizing composition of the present invention can be used in various solid forms, such as powder or molded products such as pellets or plates. When forming a molded product, a suitable binder such as a polymeric binder is used, and a conventional molding method can be employed.

Next, the present invention will be explained in more detail with reference to Examples.

Reference Example In order to examine the stabilizing effect of an organic acid or its salt on divalent iron ions, iron sulfate heptahydrate (FeSOa 71(2)
Sample aqueous solutions were prepared by adding 0.5 g of various organic acids or their salts to 10 cc of a 10% by weight aqueous solution of 0), and after standing for two weeks, the presence or absence of precipitation was examined. The results are shown in the following table along with the pH of the sample aqueous solution.

Table 1 Example 1 (1) Preparation of deodorizing composition 10 parts by weight of finely ground ferrous sulfate heptahydrate, 5 parts by weight of an organic acid or its salt, and 4 parts by weight of crude finely powdered common salt. A mixture [■] was prepared by uniformly grinding and mixing with a milk pestle.

On the other hand, powdered activated carbon was prepared separately.

Next, the mixture (1319 parts by weight) and 20 parts by weight of activated carbon were mixed uniformly, and 10 g of this mixture was poured into a breathable bag (8 parts by weight).
c+++ x 6cm) to prepare a product.

(2) Deodorization test The above product was placed in a polyethylene bag with an internal volume of approximately 1200 cc, a filter paper impregnated with 0.5 cc of aqueous ammonia (28% by weight) was placed in it, and absorbent cotton impregnated with 5 cc of water was placed. The polyethylene bag was sealed. After leaving this bag for 6 hours, it was opened and it was determined whether there was an ammonia odor inside the bag. The results are shown in the table below.

Table 2 *1...Usage of Liquorization Sa vJ page (Giburi Shoutsuki) Example 2 Put 10g of ferrous chloride into a milk drum, crush it, and add 3Na citric acid 2H20 (hereinafter referred to as citric acid) to it. (called acid soda)
Add 5g of calcium hydroxide, mix evenly, and add 2g of calcium hydroxide.
g was added and mixed uniformly to prepare a mixture (II).

On the other hand, add 5 g of water to 20 g of finely ground vermiculite fired product.
After adding cc, the mixture was thoroughly stirred to form a moist filler.

Next, 17 g of the mixture (If) and 25 g of filler were uniformly mixed, and this mixture was placed in a breathable bag (8 cm x 6
cm) to produce a product.

One of the two products obtained as described above has an internal volume of approximately 1
The mixture was placed in a 200 cc polyethylene bag, and a filter paper impregnated with 0.5 cc of aqueous ammonia was added, and the polyethylene bag was sealed. In addition, another product was placed in a polyethylene bag having an internal volume of approximately 1200 cc, hydrogen sulfide gas was poured into the bag until its foul odor was felt, and the polyethylene bag was sealed. When these bags were opened after being left for 18 hours and the odor inside was examined, no odor was detected inside any of the bags.

Example 3 A mixture (III) consisting of 5 g of ferrous sulfate heptahydrate, 2.5 g of sodium citrate, and 19 activated carbon was prepared in the same manner as in Example 1 (1), and this was placed in a breathable bag. The deodorization test was conducted in the same manner as in Example 1 (2). After 24 hours, the polyethylene bag was opened and the ammonia odor inside the bag was examined, and almost no ammonia odor was detected.

Example 4 In the same manner as in Example 2, 782,010 g of ferrous sulfate,
A mixture (rV) consisting of 5 g of sodium citrate, 2 g of crude common salt, 20 g of burned vermiculite and 5 cc of water was added as a filler (rV), and this mixture was placed in a breathable bag to prepare a product. One of the two products obtained in this way,
When one sample was subjected to an ammonia deodorization test in the same manner as in Example 2, and another one was subjected to a hydrogen sulfide deodorization test in the same manner as in Example 2, no odor was detected in either case.

Example 5 Ferrous sulfate 7H2010 parts by weight, magnesium oxide 5
A fine homogeneous mixture (V) consisting of 5 parts by weight of sodium citrate and 5 parts by weight of crude common salt was prepared. This mixture (
V) 5 g of 2; and 2.5 g of activated carbon were uniformly mixed, placed in a breathable bag, and subjected to a hydrogen sulfide deodorization test in the same manner as in Example 2. After 18 hours, open the polyethylene bag and
When the hydrogen sulfide odor was examined, no odor was detected at all.

Example 6 The deodorizing agent of sample No. 1 shown in Table 2 of Example 1 was left in a household refrigerator for 3 months, and then a deodorization test was conducted in the same manner as in (2) of Example 1. In this case as well, no ammonia odor was detected, confirming that the deodorizer was working effectively.

Example 7 Using the sample No. 1 deodorizer shown in Table 2 of Example 1,
A deodorization test was conducted on cysteamine hydrochloride. In this case, the deodorization test was conducted using 0.5 cc of ammonia water in (2) of Example 1.
Instead, cysteamine hydrochloride aqueous solution (concentration 10% by weight)
) The same procedure was carried out except that 0 and 5 cc were used. As a result, no odor was detected within the polyethylene bag during the 3-hour test period.

Example 8 A deodorizer was obtained in the same manner as in Example 5, except that 5 parts by weight of magnesium hydroxide was used instead of 5 parts by weight of magnesium oxide. As a result of a garlic odor deodorization test using this deodorizer, most of the garlic odor was removed in about 16 hours.

In this case, the deodorization test was conducted by putting about 3 g of shredded garlic into a polyethylene bag (inner volume: about 1200 cc), leaving it for about 30 minutes, removing the garlic from the bag, and then using this strong The deodorizer was placed in a bag containing a garlic odor, and the bag was sealed together with absorbent cotton impregnated with 5 cc of water. After about 16 hours, the bag was opened and the garlic odor inside the bag was examined.

Claims (5)

[Claims] (1) A solid deodorizing composition consisting of a powdery mixture or a molded product thereof containing a divalent iron salt, an organic acid or its salt, a filler and, if necessary, a pH adjuster. (2) The composition according to claim 1, wherein the filler has water added thereto in advance. (3) The composition according to claim 1 or 2, wherein the pH adjuster is an alkaline substance. (4) A solid deodorizing composition comprising a powder mixture or molded product thereof containing a divalent iron salt, an organic acid or its salt, a filler, a deliquescent substance, and, if necessary, a pH adjuster. (5) The composition according to claim 4, wherein the pH adjuster is an alkaline substance.