TW201607894A - Aqueous solution having odor purification function - Google Patents

Abstract

An aqueous solution having odor purification function is provided. The aqueous solution includes a zinc oxide, a chelant and an acid. In the presence of an acid, zinc oxide is dissolved into water as divalent zinc ion. The chelant is used to chelate divalent zinc ion of the zinc oxide, and to make the chelated complex stably dissolve in water such that the aqueous solution appears clear.

Description

Aqueous solution with odor purifying function

This invention relates to an aqueous solution, and more particularly to an aqueous solution comprising divalent zinc ions and useful for removing malodors.

Common sources of malodor include smoke, pollutants or spoilage. When contaminants and spoilages are present, they may give off a foul smell and stimulate the human sense of smell, which may cause an uncomfortable feeling.

Especially in an indoor environment, due to the low degree of air circulation, the foul smell is not easily dissipated and it is easy to continue to affect the human sense of smell. When humans feel the stench, they will all damage the spirit and even health. For example, if you have a person with respiratory or cardiovascular disease, you may have an adverse effect on your body.

Sometimes, even if you remove the source of the foul smell, there may still be some substances in the air that will give off a foul smell. Therefore, how to remove the bad smell to keep the air fresh is an important issue.

In a typical home environment, the source of odor is mainly derived from the taste of, for example, pet excrement, bath taste, food waste, mold, and the like. The chemical composition of such tastes is primarily gas molecules bearing sulfur or nitrogen atoms, such as hydrogen sulfide, methyl sulfide, methyl mercaptan, 3-methyl hydrazine, methyl amine, ammonia, and the like.

The present invention provides an aqueous solution having an odor purifying function comprising divalent zinc ions to adsorb malodorous substances, thereby achieving a purifying function.

The aqueous solution having a purifying function of the present invention includes zinc oxide, a chelant, and an acid. In the presence of an acid, zinc oxide is soluble in water to form divalent zinc ions. The chelating agent is used for chelation of divalent zinc ions formed by zinc oxide, so that the chelate formed by the divalent zinc ion and the chelating agent can be stably dissolved in water to form a clear solution, wherein the bonding strength of the divalent zinc ion and the chelating agent Less than the bond strength of divalent zinc ions and malodors.

In an embodiment of the invention, the chelating agent comprises the structure shown in Formula 1 or Formula 2:

The aqueous solution having the odor purifying function of the present invention is particularly advantageous for removing malodorous substances containing sulfur or nitrogen atoms. When the aqueous solution having the odor purifying function of the present invention is exposed to an odor molecule containing sulfur or a nitrogen atom in the air, the divalent zinc ion in the aqueous solution is chelated with the sulfur or nitrogen atom, thereby fixing the odor molecule. Passivation, to achieve the purpose of eliminating odor.

In an embodiment of the invention, the acid includes citric acid, acetic acid, phosphoric acid, hydrochloric acid, nitric acid, and/or other organic and inorganic acids.

In an embodiment of the invention, the content of the divalent zinc ion is 0.1 to 6.0% by weight of the aqueous solution.

In an embodiment of the invention, the chelating agent is present in an amount of 10 to 30% by weight of the aqueous solution.

In an embodiment of the invention, the acid content is from 1 to 40% by weight of the aqueous solution.

In an embodiment of the invention, the aqueous solution further comprises a fragrance.

In an embodiment of the invention, the aqueous solution further comprises an emulsifier.

In an embodiment of the invention, the aqueous solution further comprises a co-solvent.

Based on the above, the divalent zinc ion of the aqueous solution of the embodiment of the present invention has a function of removing malodorous taste. The chelate of the chelating agent and the divalent zinc ion can be dissolved in the water The aqueous solution of the embodiment of the invention is stably rendered in a clear state. Since the zinc atom in the zinc oxide accounts for a high proportion of the total molecular weight of the zinc oxide, the aqueous solution having the odor purifying function formed by the low concentration of zinc oxide can have a good deodorizing effect.

The above described features and advantages of the invention will be apparent from the following description.

An embodiment of the present invention provides an aqueous solution having an odor purifying function comprising a divalent zinc ion, a chelant, and an acid. A chelating agent is used to sequester the divalent zinc ions. The chelate of the chelating agent and the divalent zinc ion can be dissolved in water, and the aqueous solution of the embodiment of the present invention stably exhibits a clarified state. When the source of the divalent zinc ion is zinc oxide, the presence of the acid may additionally help the zinc oxide to dissolve in water to form divalent zinc ions, and may also adjust the pH of the aqueous solution. In addition, the use of citric acid can further stabilize the divalent zinc ions in the aqueous solution, and the odor purification function is more sustainable. The description of the components included in the aqueous solution of the present embodiment is as follows, and the examples, contents, and the like of the components are merely illustrative, and are not intended to limit the present invention.

The source of the divalent zinc ion of this embodiment is, for example, zinc oxide. Divalent zinc ions have good bonding ability to common malodorous substances such as hydrogen sulfide, amines, etc. Therefore, divalent zinc ions can effectively adsorb hydrogen sulfide and amines to achieve deodorization. Features. The content of zinc oxide is about that of an aqueous solution 0.1 to 6.0 weight percent. Specifically, the molecular weight of zinc oxide is about 81.4, wherein the atomic weight of zinc ions is about 65.38, that is, the zinc ion accounts for about 80% of the molecular weight of zinc oxide, so the content of zinc ions in each molybdenum oxide is equivalent. Therefore, even if the concentration of zinc oxide in the aqueous solution is low, the number of effective deodorization equivalents can be high. In other words, a good deodorizing effect can be achieved without using excessive zinc oxide in the aqueous solution.

Zinc oxide is generally used as an additive and is used in a variety of materials and products, including plastics, ceramics, glass, medical first aid bandages and foods (zinc supplements). In other words, zinc oxide has even edible properties, so the impact on the organism or the environment is relatively small. Therefore, when the aqueous solution containing zinc oxide absorbs the malodorous substance, it can be directly poured without special treatment. The sink is not easy to impact the environment and is quite environmentally friendly.

Specifically, zinc oxide has a low solubility in water. In order to dissolve zinc oxide in water, the aqueous solution of the present embodiment further includes an acid such as acetic acid, phosphoric acid, hydrochloric acid, nitric acid, and/or other organic and inorganic acids. The acid helps the zinc oxide dissolve in the water. The acid content is from about 1 to 40 weight percent of the aqueous solution. Further, the acid can also adjust the pH of the aqueous solution of the present embodiment to meet specific needs. Tables 1 to 1 below illustrate Examples 1-6 to illustrate possible adjustment ratios, but are merely illustrative and not intended to limit the invention, wherein the chelating agent employed is as in Formula 2 above. Wherein ZnO, a chelating agent, an acid, a pure water, and a sum are all in parts by weight, which is a weight ratio used between the components, and the acid content, the chelating agent, and the Zn content described later are each component as a whole solution. Percentage by weight (wt%).

According to this embodiment, the chelating agent is, for example, used to chelate divalent zinc ions dissolved in an aqueous solution, wherein the binding ability of the chelating agent to the divalent zinc ions is less than the binding ability of the divalent zinc ions to the malodorous substances. In other words, when the aqueous solution has not been exposed to a malodorous substance such as hydrogen sulfide or an amine, the chelating agent can sequester the divalent zinc ion, and the chelate of the chelating agent and the divalent zinc ion is soluble in water. When the aqueous solution is in contact with the malodorous substance, the divalent zinc ion is easily combined with the malodorous substance to be separated from the chelating agent, thereby achieving the function of adsorbing the malodorous substance. In this way, the effect of removing the foul smell can be achieved.

In this embodiment, the chelating agent is present in an amount of 10 to 30% by weight of the aqueous solution. For example, the chelating agent includes the structure shown in Formula 1 or Formula 2. The chelating agents shown in Formula 1 and Formula 2 are derived from natural substances, have biodegradability, and can act in a wide range of pH values, and thus are environmentally friendly chelate. Mixture, which is not easy to impact the environment. In particular, the aqueous solution of the present embodiment is more preferably controlled at a pH of about 7, which will be more environmentally friendly, but the pH is not intended to limit the scope of the present invention, and the present invention is different in various fields of application. The aqueous solution having the odor purifying function can be adjusted to obtain different pH values by the formulation. It is worth mentioning that if the aqueous solution of the present embodiment is sprayed in the air, the components of the aqueous solution may come into contact with human skin, so when the aqueous solution is made of natural substances, it will not be easy for the human body. The skin has an adverse effect.

When preparing an aqueous solution having the odor purifying function of the present embodiment, the zinc oxide powder and the acid may be stirred and dissolved in a certain proportion in hot water, and then a chelating agent is added to stabilize the prepared divalent zinc. Ionic aqueous solution. Alternatively, the zinc oxide powder, the acid, and the chelating agent may be simultaneously dissolved and dissolved in hot water, or an aqueous solution having an odor purifying function according to the embodiment may be prepared, and the odor purification function is not different. .

The present invention can be directly formulated into a deodorizing aqueous solution by using zinc oxide without adding an emulsifier, but the present invention is not limited thereto, and the present invention can appropriately add an emulsifier according to the use case to exert a further effect. . For example, the aqueous solution of the present invention may further comprise a fragrance further. The fragrance can have an aromatic effect, and when the malodorous taste in the environment is removed, the air can further impart a fragrant and fresh feeling, and the human sense of smell is pleasant and comfortable. Moreover, it is also possible to add fragrances of different tastes depending on personal preference. At the same time, it achieves the effects of deodorization and aroma.

If the fragrance to be added is an oil phase substance, it can be further added. The emulsifier is in the aqueous solution of this example. The emulsifier helps to allow the fragrance to be uniformly mixed in the aqueous solution without turbidity or precipitation. The emulsifier may be used singly or in combination of two or more, and is not particularly limited. Examples of emulsifiers are, for example, PEG-7 hydrogenated castor oil, PEG-40 hydrogenated castor oil, PEG-60 hydrogenated castor oil, PEG-35 castor oil, PPG-1 PEG-9 lauryl glycol ether, and whale wax. Aliphatic-12, ceteareth-20, ceteareth-25, oleyl alcohol, PEG-20 glyceryl stearate, stearyl-21, PEG -20 lauric acid glyceride, oleic acid glyceride, PEG-45 palm kernel glyceride, PEG-6 caprylic/capric glyceride, PEG-20 sorbose monolaurate, PEG-40 sorbose monolaurate, PEG-60 sorbose monolaurate, PEG-80 sorbose monolaurate, and the like. In principle, it can be used as long as it contributes to dissolving the fragrance in an aqueous solution, and is not particularly limited. In other words, the aqueous solution which is uniformly mixed and exhibits clarification can be used in various containers to function by, for example, spraying, smearing, and the like.

Further, a co-solvent may be optionally added to the aqueous solution of the present embodiment, and the co-solvent may uniformly mix the fragrance with the emulsifier. The co-solvent can be, for example, an alcohol, dipropylene glycol, 1,3-butylene glycol, polyethylene glycol or other alcohol solvent. In principle, as long as a co-solvent which helps to uniformly mix the fragrance with the emulsifier can be used, considering the toxicity and irritation of the co-solvent to the human body, an alcohol co-solvent is preferred.

The following examples and comparative examples are given to illustrate the aqueous solution of the examples of the present invention, wherein the content of each component, the production steps and the like are merely illustrative and are not intended to limit the invention.

Instance

First, 2.7 grams of zinc oxide, 7.5 grams of citric acid, 7.33 grams of chelating agent, and 25.77 grams of pure water (as in the composition of Example 1 of Table 1) were mixed and heated to 70-90 ° C until stirred. The clarified state is dissolved to form an aqueous mixed solution. Then, the aqueous solution having the odor purifying function of the invention is cooled by standing to cool at room temperature, but it is necessary to pay attention to the fact that the water cannot be lost during the preparation process. The chelating agent is, for example, a chelating agent of the above formula 2.

Next, 1 gram of the fragrance, 4 grams of the emulsifier, 15 grams of the co-solvent, and 18.8 grams of pure water are mixed together to form another mixed solution, which is then mixed with the aqueous mixed solution described above, and the emulsifier is used to make two The mixture is uniformly mixed, whereby an aqueous solution which is clear and has a purifying function is obtained. The emulsifier may be used singly or in combination, and the co-solvent may be used singly or in combination, and is not particularly limited.

Evaluation

The hydrogen sulfide purification effect test was performed on the aqueous solutions of the examples and the comparative examples below. The detection method is as follows. First, a commercially available simple air purifier and a hydrogen sulfide gas detecting tube (GASTEC hydrogen sulfide 4LB) are built in a 125 liter vessel, and the simple air purifier is internally filled with an aqueous solution to be tested. The 125 liter vessel is then sealed and hydrogen sulfide gas is supplied to the vessel while the air purifier is turned on to start operation. Finally, the hydrogen sulfide gas detecting tube was used to measure the concentration of hydrogen sulfide gas in the 125 liter closed container at regular intervals, and the hydrogen sulfide removal efficiency was calculated. The action mechanism of the simple air purifier firstly draws the surrounding air into the inside of the body through the pumping mechanism of the body itself, and then the aqueous solution to be tested which is installed inside the body (for example, the aqueous solution having the odor purifying function of the present invention) Diluent) The odor in the air is purified, and finally the purified air is discharged.

Table 2 shows the results of hydrogen sulfide removal in the examples of the present invention. Table 3 is a comparative example aqueous solution (the main deodorant component of the comparative example aqueous solution is zinc ricinoleate, wherein zinc ricinoleate is a zinc chelate compound derived from ramie, since zinc ricinoleate itself is an oil-soluble substance, The result of removal of hydrogen sulfide by the addition of an emulsifier to dissolve it in water and the proportion of zinc in the molecule is low. The test sample for filling the simple air purifier (including the example of the present invention and the aqueous solution of the comparative example) is diluted 100 times with pure water, and about 300 g of the diluted solution is respectively filled in a simple air purifier for testing, wherein The aqueous solution of the comparative example is a commercially available deodorant product, and the component of the aqueous solution mainly contains zinc ricinoleate.

As can be seen from Table 2 and Table 3, the aqueous solution dilution of this example (Table 2) can remove about half of the hydrogen sulfide after 5 minutes, and after 30 minutes, the hydrogen sulfide removal rate can be as high as 98.2%. . In comparison, the aqueous solution dilution of the comparative example (Table 3) only reached 61.3% hydrogen sulfide removal rate after 30 minutes. From this, it is understood that the aqueous solution of the present invention can exert an efficient hydrogen sulfide removal force in a short period of time, and does have a good malodor removal effect.

In summary, the aqueous solution of the embodiment of the present invention contains divalent zinc ions, which have a function of absorbing malodorous substances to remove malodorous taste. The presence of an acid can help the zinc oxide dissolve in the water to facilitate sequestration of the divalent zinc ions by the chelating agent. The chelate of the divalent zinc ion and the chelating agent can be dissolved in water and the aqueous solution of the embodiment of the present invention assumes a clear state. Since the zinc oxide content in the zinc oxide is high, the concentration of the zinc oxide does not need to be too high, so that it has a sufficient number of deodorizing equivalents, and thus has a good deodorizing effect.

Claims (10)

An aqueous solution having an odor purifying function, comprising: zinc oxide; an acid, in the presence of the acid, the zinc oxide is dissolved in water to form divalent zinc ions; and a chelating agent for sequestering the zinc oxide a divalent zinc ion formed, the chelate of the divalent zinc ion of the zinc oxide and the chelating agent being soluble in water to form a clear solution, wherein the bonding strength of the divalent zinc ion to the chelating agent is less than the divalent zinc ion The bonding strength with the malodor. The aqueous solution of claim 1, wherein the chelating agent comprises the structure shown in Formula 1: The aqueous solution of claim 1, wherein the chelating agent comprises the structure shown in Formula 2: The aqueous solution of claim 1, wherein the acid comprises citric acid, acetic acid, phosphoric acid, hydrochloric acid or nitric acid. The aqueous solution according to claim 1, wherein the content of the divalent zinc ion is 0.1 to 6.0% by weight of the aqueous solution. The aqueous solution according to claim 1, wherein the chelating agent is contained in an amount of 10 to 30% by weight of the aqueous solution. The aqueous solution of claim 1, wherein the acid is present in an amount of from 1 to 40% by weight of the aqueous solution. The aqueous solution according to claim 1, further comprising a fragrance. An aqueous solution as described in claim 8 of the patent application, further comprising an emulsifier. The aqueous solution according to claim 9 of the patent application, further comprising a co-solvent.