JPS63117764A - Deodorant - Google Patents

Abstract

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

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a deodorizing agent containing ferrous sulfate as a main component.

(Prior Art) Off-flavors emitted from foods eaten by humans, livestock, etc. are mainly caused by so-called organic decomposition products.

The size of these malodorous molecules is said to be 4 to 8, and the number of types is said to be 300 to 400. Typical examples include nitrogen compounds such as ammonia and trimethylamine, sulfur such as methyl mercaptan, and hydrogen sulfide. The compound fails.

Deodorizing agents that have traditionally been used to remove these bad odors include an adsorption method in which the gas that causes the bad odor is adsorbed on activated carbon, etc., a chemical absorption/oxidation method, a direct combustion method, a catalytic deodorizing method, and a biological method. Although there are engineering deodorization methods, their effects are not sufficient and the costs are extremely high.

For example, deodorizing agents that utilize oxidation include hypochlorite, chlorine dioxide, chlorite, chlorinated isocyanuric acid, and salami powder. In addition, ozone and hydrogen peroxide-based deodorizers are also highly likely to create an environment that is harmful to the human body.

Therefore, in recent years, deodorizers containing ferrous sulfate or the like as a main component have been widely used as deodorizers that are effective against a wide range of malodorous substances, are inexpensive, and are highly safe. This eliminates bad odors by reacting ferrous sulfate with ammonia, hydrogen sulfide, etc., which are components of bad odors, in an ionized solution to produce ammonium sulfate and iron sulfide.

However, ferrous sulfate is gradually oxidized in the air and in aqueous solutions, becoming reddish-brown trivalent iron, which has the property of easily forming itJ in aqueous solutions, resulting in poor stability and storage problems. . Further, such precipitates are not desirable because they cause problems in deodorizing performance and also give the user a feeling of anxiety and discomfort regarding the product.

Furthermore, ferrous sulfate crystals contain F as a trace component.
e (trivalent), Cu, Zn, Ca, Mq.

Contains metal ions such as Ti, and these metal ions may inhibit the deodorizing reaction of ferrous sulfate.
The efficiency of the deodorizing reaction using ferrous iron was decreasing. Furthermore, although it is possible to remove these metal ions from within the crystals of ferrous sulfate, it is an extremely difficult and costly task in the actual production of deodorizers. The treatment of trace amounts of metal ions has been a major problem.

(Problems to be Solved by the Invention) As mentioned above, the present invention, which uses conventional ferrous sulfate as its main component, was proposed to solve the problems of the prior art as described above. To provide a deodorizer that stabilizes the divalent iron ions of ferrous sulfate in the ferrous sulfate and eliminates the adverse effects of trace amounts of metal ions contained in the ferrous sulfate, thereby enhancing preservation and deodorizing effects. There is a particular thing.

[Structure of the Invention] (Means for Solving the Problems) The deodorizer of the present invention has ferrous sulfate as its main component, and contains ethylenediaminetetraacetic acid ( It is characterized by consisting of an aqueous solution containing EDTA (hereinafter referred to as EDTA), L-alcorbic acid as an antioxidant, and citric acid to adjust the pH to 5 or less.

(Function) In the present invention having the above configuration, L-ascorbic acid added to the aqueous solution of ferrous sulfate acts as an antioxidant, and the divalent iron ions of ferrous sulfate act as an antioxidant. to prevent the precipitation of trivalent iron.

EDTA combines with metal ions to form a chelate, so the various metal ions contained in the solution form a stable complex, and the deodorizing effect of ferrous sulfate is no longer inhibited, improving the deodorizing effect. .

In this case, the dissociation state of EDTA changes depending on its liquid properties, but Fe(3II) and Cu present in the aqueous solution
In order to chelate metal ions such as , Zn, Ca, Mg, and Ti, it is desirable to adjust the pH to <5, so citric acid is added to adjust the pH.

At the same time, this citric acid also has the effect of improving the fermentation prevention effect of L-ascorbic acid, so that the stability of ferrous sulfate becomes even better.

(Example) *Structure and manufacturing method of Example First, high-quality water that is commonly used for drinking is selected as the water for dissolving ferrous sulfate, and when used, it is treated with an ion-exchange water softener or a pure water device. Pour the filtered product into the dissolution tank at a constant rate. Add EDTA to the water beforehand.
50 to aooppm1, preferably 50 to 1100
Add pp.

Note that the sodium salt of EDTA may be used.

Next, the water temperature in the dissolution tank is adjusted to 25°C, and tilted ferrous iron is gently added so as to become a saturated solution, and stirred. Then, the EDTA added to the aqueous solution in advance removes Fe (trivalent>, Cu, Zn) contained in the ferrous sulfate crystals.
, Ca, Mg, Ti, and other metal ions are chelated, and divalent iron ions in the aqueous solution are stabilized.

After that, it was measured with a PH meter and L-ascorbic acid was 100%
~300I)I)m, more preferably 100-150p
pm, 100 to 300 ppm 1, preferably 100 to 150 DDm of citric acid is added, stirred, and allowed to stand still for 40 to 60 minutes to adjust.

Note that the dissolution tank, pipes, valves, etc. used for liquid production are all made of vinyl chloride, polyethylene, etc. to prevent rust.

Effects of this Example In the deodorizing agent of this example produced as described above, the water for dissolving ferrous sulfate is distilled water without impurities, filtered by a water softener using ion exchange or by a pure water device. Since a manufactured product was used, impurities in the raw water do not impede the deodorizing efficiency of ferrous sulfate.

In addition, in this example, EDTA is added to the water in advance, so when ferrous sulfate is dissolved, the impure metal ions immediately form a mirror body, so that impurity precipitation does not occur in the solution. , does not interfere with the action of the antioxidant added later. Although it is possible to add EDTA after dissolving 5A ferric acid in water, the stability of the solution is better if it is added to water in advance.

Furthermore, in this example, L-alcorbic acid is used as the antioxidant, so compared to other antioxidants,
The antioxidant effect is more effectively exhibited due to the synergistic effect with citric acid used for F'H adjustment.

Effects of this Example Next, we will examine the effects of the deodorizer of this example adjusted as described above.
The results obtained by measuring the ammonia gas concentration are shown below.

That is, the above chemical solution and water passage (as an untreated control experiment)
The mixture was sprinkled on 10 g of chicken manure, mixed well, and left in an incubator for 24 hours. The gas generated was measured, and an excellent deodorizing effect as shown in Table 1 was observed.

Both acid and acid are approved as food additives, and when used in a septic tank, they do not kill microorganisms in the aeration tank, such as Portichella, Albitis, Paramedium, and Filocina, and can be used to purify the tank. It does not interfere with the action. For example, if a chlorine-based deodorizer is used in an aeration tank, microorganisms will be killed and the BOD will be 500~
600, which far exceeds the legal regulation value of 120, whereas the deodorizer of this example was confirmed to have a BOD as low as 63 without fear of killing microorganisms.

A remarkable effect was also seen in deodorizing pump-type toilets. That is, the conventional deodorizing method was a method of masking or a method of spraying or pouring an appropriate amount of deodorizing liquid each time after using the toilet, but with the deodorizing agent of this example, 500
~600 If you have a toilet tank of love, 11 bottles of 350m will be 75~1
By diluting the water to 1:00 and adding it, the deodorizing effect lasted for 60 days, and no bad odor was produced until the water was drained. In fact, no bad odor was observed even after pumping.

Furthermore, since the pH of the diluted solution is low, the proliferation of miscellaneous fungi and especially anaerobic bacteria can be suppressed.

In addition, recently, soil fertility has declined due to overuse of chemical fertilizers, and the number of microorganisms, which are said to normally exist in 1 q of surface soil, has decreased dramatically.

This current situation calls for the need for organic fertilizers, but one of the major obstacles to using organic fertilizers is their foul odor. For example, 6,000 tons of livestock manure is sloppily crushed each year, and if this manure could be used effectively as fertilizer, it would be possible to make do without using any chemical fertilizers, but conventionally, There were major restrictions on its use. And conventional deodorizers are
Although it was possible to eliminate the odor to some extent, there were always problems with safety and the effect it would have on the growth of crops if it were to be used in fields, making it inconvenient to use widely.

On the other hand, the deodorizer of this example is made of ingredients recognized as food additives in the above-mentioned T-balls, and is not only safe but also
There are no inconveniences that would adversely affect crop growth. For example, when we investigated the germination and post-germination effects of komatsuna when we sprayed this deodorizer on a field that had been treated with organic fertilizer to deodorize it, and when we simply applied organic fertilizer alone, we found that there was no difference between the two. No significant difference was observed in the germination and growth after germination.

In addition, the iron contained in this deodorizer has the following functions in the soil.

・Mediates redox reactions of bacteria and other microorganisms in soil. In other words, these bacteria decompose organic matter in the soil and play a major role in the material cycle in the natural world. Mediates redox reactions of organic substances by changing valence.

- Porphyrin compounds of cytochromes (heme protein 'Jq) related to respiration, peroxidase, catalase, and ferredoxins related to photosynthesis and nitrogen fixation exist bound to cysteine, and in the presence of iron, aconitic acid water Additive enzyme and catecholic dioxygenase become active for the first time.

- Exists in high concentration in the stroma of chloroplasts, helps in the synthesis of chlorophyll, and deficiency causes whitening.

-The function of so-called iron bacteria is to oxidize divalent iron ions to trivalent iron ions using molecular enzymes, and use that energy to fix carbonate.

- As an electron transport chain, it reduces cytochrome by cytochrome reductase and becomes a trivalent iron.

In this way, iron and iron ions are essential elements in soil, and at the same time, their coexistence with organic matter promotes the proliferation of these bacteria, and by controlling pH, it helps to form fertile soil. Therefore, if the deodorizing agent of this example containing iron and iron ions as described above is used, the effects of bacteria and other bacteria can be effectively exerted, and as a result, the deodorizing agent of this example containing iron and iron ions as described above can be effectively exerted. This makes it possible to obtain soil that is rich in moisture absorption, excellent in storing solar energy, and strong for crops even in cold regions.

As mentioned above, even if the deodorizer of this example is sprayed together with organic fertilizer to remove the bad odor, it will not have a negative effect on the growth of crops, and on the contrary, it has the advantage of helping to create fertile land. .

[Effects of the Invention] As described above, according to the present invention, by adding E, D, T, and A as keylet agents, not only can the adverse effects of impurities in ferrous sulfate be eliminated, but also the keylet The citric acid used to adjust the pH of the agent also improves the antioxidant effect of monoascorbic acid, so compared to conventional deodorizers using ferrous sulfate, it has excellent storage and stability, making it an effective deodorizer. It is possible to provide a deodorizing agent that is highly effective, harmless, and excellent as a fertilizer.

Claims (1)

[Claims] (1) Ethylenediaminetetraacetic acid, which has ferrous sulfate as its main component and chelates metal ions that are impurities in the ferrous sulfate, and L-alcorbic acid as an antioxidant are added, as well as citric acid. A deodorizing agent comprising an aqueous solution whose pH is adjusted to 5 or less.