KR20030030345A - Deodorant and method for making the same using multiporous adsorbent - Google Patents

Abstract

PURPOSE: A deodorant usable for air cleaner and air conditioner is provided, to enhance the adsorption ability and the oxidative decomposition ability by special treating a porous adsorbent. Also, a preparation method thereof is provided. CONSTITUTION: The preparation method of the deodorant using the porous adsorbent includes (a) mixing the porous adsorbent such as active carbon, zeolite or ceramic and a solution of metal salt of 0.1 to 10% and stirring it; (b) evaporating moisture by heating the solution to 150 deg.C to adhere the metal to the porous adsorbent; (c) baking the evaporated porous adsorbent to 170 to 550 deg.C under no oxygen gas for 2 to 6 hours; and (d) cooling the baked porous adsorbent to 150 deg.C under no oxygen gas.

Description

Deodorant and method for making the same using porous adsorbent

The present invention relates to a deodorant using a porous adsorbent and a method of manufacturing the same, and more particularly, to a porous adsorbent on which a metal having excellent gas adsorption and oxidation resolution is prepared by stirring, water evaporation, firing, and cooling a porous adsorbent and a metal salt solution. To manufacture and use it for air cleaning in a refrigerator, air freshener or air conditioner.

As a by-product of the development of modern industrial technology, many pollutants are emitted, causing serious problems to the environment, such as water quality and the air. The damage caused by odors is becoming more serious not only at home but also at industrial sites. Odor problems occur not only in the indoor environment of homes and offices, but also in public facilities such as public restrooms, wastewater treatment plants and manure treatment plants, and sulfur-based compounds such as hydrogen sulfide and nitrogen-based compounds such as ammonia are typical odor gases. Turns out

Typically, to remove odor-causing substances that occur in refrigerators or homes, conventionally, physical and chemical sprays of vanillin, rosin, and fragrances with strong odors are used to deodorize the stomach or mix substances with different odors. It was common to remove odors by neutralization to reduce odor or odor.

However, there is a problem that it is difficult to continuously maintain the cleanliness of the refrigerator or the room by the deodorizing method because the odor is constantly generated. In general, the refrigerator is used for long-term storage of food while preventing food spoilage, but is usually controlled within the temperature range of 0 ~ 10 ℃, but if the food is left in the refrigerator for a certain period of time, the food spoilage begins, The odor is generated according to the type of food contained in the refrigerator, and different food odors may be mixed and mixed with each other to generate a bad odor that is unpleasant to the user.

Therefore, in order to effectively remove odor gas generated in various places as well as a refrigerator, a deodorant having high oxidation catalyst activity of odor gas is required.

The present invention has been tested to solve the problems of the prior art, as a result of the special processing treatment of the porous adsorbent to improve its adsorption power and oxidative decomposition to produce a deodorant that can be utilized in refrigerators, air fresheners, air conditioners, etc. Completed.

Accordingly, it is an object of the present invention to provide an air cleaning deodorant excellent in oxidation resolution and a method for producing the same. Hereinafter, the configuration of the present invention will be described in detail.

1 is a schematic diagram showing a manufacturing process of the present invention deodorant.

The above object of the present invention has been achieved by specially processing porous adsorbents such as fibrous activated carbon, granular activated carbon, zeolite, ceramic and the like to prepare a deodorant which efficiently removes the gas causing the odor.

According to the method for preparing the deodorant of the present invention for solving the above problems, the porous adsorbent and the water-soluble metal salt solution are mixed and stirred at an appropriate ratio, the water is evaporated, calcined and cooled under anoxic conditions, and excellent in oxidative decomposition of various gases. An adsorbent is prepared, and the porous adsorbent prepared by the above method is used as a deodorant to remove general odors by forming a product into a certain form and shape according to the purpose of use. That is, the method for preparing a deodorant using the porous adsorbent of the present invention comprises the steps of: (a) mixing and stirring a porous adsorbent such as activated carbon, zeolite or ceramic and a 0.1% to 10% metal salt solution; (b) the stirring solution at a temperature of 150 ° C. Attaching a metal to the porous adsorbent by heating and evaporating moisture; (c) calcining the water-evaporated porous adsorbent at 170-550 ° C. under anoxic state for 2 to 6 hours; And (d) cooling the calcined porous adsorbent to 150 ° C. in an anoxic state, wherein the method comprises the steps of (e) forming a metal-supported porous carrier into a specific shape for use as a deodorant. It may further comprise a step.

Hereinafter, the method for preparing the deodorant of the present invention will be described in more detail with reference to FIG. 1.

(1) mixing and stirring the porous adsorbent and the water-soluble metal salt

Porous adsorbents for use in the deodorant of the present invention may be granular activated carbon, fibrous activated carbon, zeolite or ceramics, and one of these porous adsorbents and a water-soluble metal salt in distilled water or pure water is sufficiently stirred in a stirrer and then these pretreated The porous adsorbent is introduced to submerge in the furnace.

The metal salts used may be organic or inorganic acid salts such as acetic acid and nitrate. Specifically, metal salts such as copper, manganese, iron, nickel, titanium, aluminum, platinum, and palladium are used. The activity is very excellent, and in some cases, one or more of these metal salts may be mixed and supported on a porous carrier. Each metal or the like is preferably supported on the porous adsorbent in a weight ratio of at least 0.1 weight ratio, and the supporting amount can be adjusted to change the ratio of the porous adsorbent mixed with the concentration of the metal salt in the aqueous solution to at least 0.1 weight ratio.

(2) water evaporation and firing

After the stirred solution was introduced into the furnace, the water was completely evaporated at a temperature within 150 ° C. in order to allow the metal to adhere to the porous adsorbent, and then, for about 2 to 6 hours under an oxygen-free atmosphere, depending on various gas types to be removed. The temperature is fired at a predetermined temperature within the range of 170-550 ° C.

At this time, in order to create an oxygen-free atmosphere, another gas such as nitrogen or carbon dioxide is injected into the furnace to create or maintain an oxygen-free atmosphere.

(3) cooling

After the above-mentioned process, the porous adsorbent carrying the calcined metal is cooled to 150 ° C. in an oxygen-free atmosphere, and the product is taken out of the furnace. Depending on the metal to be supported and the type of carrier, the porous adsorbent is immersed in an aqueous sodium chloride solution as a pretreatment so that the metal is well supported, and then dried in a furnace.

The porous adsorbent on which the metal having an oxidation catalytic activity is supported has an oxidative decomposition function for various gases at room temperature, thereby giving a role of maintaining the performance of the adsorbent for a long time. The porous adsorbent used at this time can be supported on both block and granular ones.

(4) molding

In order to use it as a deodorant, it may be used as it is prepared or molded into a specific shape. For example, it may be manufactured in sheet or granular form so as to increase the adsorption decomposition effective area to improve the adsorption capacity.

A binder is required for molding into a desired shape. Thermoplastic, thermosetting, and other resins capable of high-pressure molding may be used as the binder, and as thermoplastic materials, polyethylene, polypropylene, acrylonitrile, polyvinyl alcohol, acryl; Phenol, furan, or the like may be used as the thermosetting material. The temperature at the time of shaping | molding heat-molding 1-3 hours in 100-200 degreeC according to binder material. It will be appreciated by those skilled in the art that the use of the binder is limited to such an amount that the catalytic activity will not be reduced, which may vary sufficiently depending on the binder and the form of the molding.

Porous adsorbent treated according to the present invention not only has excellent supporting ability, but also has excellent oxidation catalyst activity of granular or block shaped shaped carriers and catalytic activity of supported catalytically active components. It can be used to remove the source of common odors. For example, when the deodorant of the present invention is used as a deodorant of a refrigerator, an unpleasant odor generated from food stored in the refrigerator and ethylene gas that promotes food decay are adsorbed and decomposed to remove odors in the refrigerator and prevent the odor from being circulated. Can be. When the deodorant of the present invention is used in an air purifier of an air conditioner, the air conditioner is mounted on the indoor air intake port and has a deodorizing function and a sterilizing function, thereby allowing the purified air to flow into the room. As well as the indoor environment. It is used to effectively remove odors generated in industrial sites and is also effective in purifying air.For example, composting plants, agricultural fields such as barns, and industrial fields such as leather and paper, and sewage treatment plants and manure treatment plants. It is also useful for removing mixed odorous gases such as sulfur-based odorous substances and nitrogen-based odorous substances to facilities.

As described above, the present invention porous adsorbent loaded with metal by special processing can be used as a deodorant which can effectively remove the gas causing odor due to its excellent oxidative decomposition ability, so it can be applied to refrigerators, air cleaners, air conditioners, etc. There is an effect that can keep more comfortable.

Claims (4)

(a) mixing and stirring a porous adsorbent such as activated carbon, zeolite or ceramics with a 0.1% to 10% metal salt solution; (b) attaching the metal to the porous adsorbent by heating the stirred solution to a temperature of 150 ° C. to evaporate moisture; (c) calcining the water-evaporated porous adsorbent at 170-550 ° C. under anoxic state for 2 to 6 hours; And (d) cooling the calcined porous adsorbent to 150 ° C. in an oxygen-free state. The method of claim 1, wherein the metal salt is acetic acid or nitrate-based metal salt of a metal selected from the group consisting of copper, manganese, iron, nickel, titanium, aluminum, platinum and palladium. The method according to claim 1 or 2, further comprising the step of (e) molding the porous adsorbent on which the metal is carried by the processes (a) to (d) into a specific shape for use as a deodorant. Method for producing a deodorant using a porous adsorbent. A deodorant prepared by the method of any one of claims 1 to 3.