KR100572277B1 - Chemical adsorbent and preparation method thereof - Google Patents

Abstract

The present invention is effective in removing odors and harmful gases generated in homes and industrial sites by impregnating alkali metals, transition metals, halogenated elements and acids in a support obtained by carbonizing and activating a crosslinked polymer polymer resin of polystyrene and divinylbenzene. The present invention relates to an adsorbent and a method for manufacturing the same, wherein the chemical adsorbent provided by the present invention is spherical in shape, has high strength and wearability, has no powdering, and has excellent adsorption performance with excellent odor and toxic gas removal. It is characterized by providing.

Polymer resin, support, chemical adsorbent

Description

Chemical adsorber and its manufacturing method {CHEMICAL FILTER AND MAKING A PROCESS}

1 is a process chart showing a manufacturing method of a chemical adsorbent according to the present invention.

The present invention is a hydrogen sulfide, mecaptan, which occurs in home and industrial sites by impregnating alkali metals, transition metals, halogenated elements and acids on a support obtained by carbonizing and activating a crosslinked polymer polymer resin of polystyrene and divinylbenzene. Odors and harmful odors of sulfur compounds of SOx, NOx, ammonia, amine nitrogen, formaldehyde, acetaldehyde, aldehyde compounds of noraine, aromatic compounds of benzene, toluene, styrene and organic compounds such as CO, CO ₂ , and pyridin The present invention relates to an excellent spherical chemisorption agent which is effective for removing gas, has excellent high strength and wearability, and is free of dust, and a method for producing the same.

In general, activated carbon obtained by adding chemicals to general activated carbon manufactured by treating wood coconut shell, coal, pitch, cellulose fiber and chemical fiber with inert gas as a raw material is used to remove harmful gas. Many have been reported.

However, the activated carbon used in these patents has a relatively large specific surface area and fine pores, so that it is suitable for use as a support for a chemical adsorbent, but its shape is in the form of powder, crushed, cylindrical, or plate, so that it can be filled efficiently. In the use of the binder in the base material of the filter is not easy to stick, and the low strength and severe abrasion due to friction caused a serious problem of powder blowing.

The present invention has been made in order to solve such a conventional problem, the present invention is prepared by adhering a chemical to a support obtained by carbonizing and activating a crosslinked polymer polymer resin of polystyrene and divinylbenzene to produce a chemical adsorbent to solve the conventional problems. It is an object of the present invention to provide a chemical adsorbent and a method for preparing the same, which are excellent in solving, removing odors and harmful gases, and suitable for removing odors and harmful gases and filter media.

The present invention is characterized in that the polymeric resin, which is a crosslinked polymer of spherical polystyrene and divinylbenzene having a size of 0.01 mm to 5 mm, is obtained by treating and drying a chemical agent on a support obtained through a carbonization process and an activation process.

In addition, the carbonization process was performed for 1 to 5 hours at a temperature range of 700 to 900 degrees Celsius by operating a polymer resin, which is a crosslinked polymer of 0.01 mm to 5 mm spherical polystyrene and divinyl benzene, at a temperature of 5 to 50 degrees Celsius. The support obtained through the activation process, the chemicals are impregnated in the impregnation process, it is characterized in that it is manufactured by drying at 25 ~ 150 degrees Celsius in the drying process.

Hereinafter, in order to solve the above problems, the crosslinked polymer polymer resin of polystyrene and divinylbenzene was used as a support in place of the activated carbon used as the support for the chemical adsorbent. Ion-exchange resin in the crosslinked polymer polymer resin of polystyrene and divinylbenzene is produced and used for industrial use. Since it is generated as a waste after use, it can be easily used to obtain a cheap and high quality carrier.

The characteristic of the support obtained by carbonizing the crosslinked polymer polymer resin of polystyrene and divinylbenzene is spherical shape of 0.01mm ~ 5mm, even after carbonization and activation process, and is 500-1500m ^2. It has a large specific surface area of / g, excellent strength, and no powder blowing due to friction.

Since the support is spherical in shape, it is suitable for use by filling or by attaching or filling to a mesh, honeycomb, urethane foam, or the like.

The process for obtaining the above support will be described in detail with reference to FIG. 1 as follows.

Step 1: drying the polymer resin to remove moisture by drying in the range of 25 ~ 150 degrees Celsius; Step 2: carbonizing the polymer resin dried in the drying step in a range of 700 to 900 degrees Celsius in an inert gas atmosphere for 1 to 2 hours; Step 3: Activate the support obtained through the carbonization process using a gas activation method for 1 to 5 hours in the range of 700 ~ 900 degrees Celsius.

If moisture is not removed in the drying step of the first step, complete carbonization occurs in the carbonization process so that it does not have a spherical shape, which is one of the characteristics of the invention, and thus water must be removed.

The temperature condition of the carbonization process, which is the second step, is more suitably 700 to 800 degrees Celsius. In the carbonization process, it is desirable to pass as quickly as possible at a temperature range of 350 to 550 degrees Celsius, which is a temperature range where a lot of carbon yield is lost. The temperature rise temperature of the carbonization process is appropriate in the range of 5 to 50 degrees Celsius / min. If the elevated temperature is less than 5 degrees Celsius, it takes a lot of time and money, the productivity is undesirably undesirable.

The three-step activation process is to develop micro and mesopores using carbon dioxide, water vapor, and oxygen, and to expand the specific surface area and pore size, and to undergo a gas activation process of about 700 to 900 degrees Celsius for 1 to 5 hours. do.

In this case, the reason for using the gas activation method in the activation process is that the chemical adsorbent or the support for the catalyst is used for a special purpose through the addition of chemicals, if the chemical activation method is used to affect the metal present after activation The performance of the adsorbents and catalysts can be reduced.

On the other hand, it is possible to use as an adsorbent with only the first to third stage support, but hydrogen sulfide, mecaptan, SOx sulfur compound NOx, ammonia, amine nitrogen compound, formaldehyde, acetaldehyde, furnace In order to remove harmful gases such as aldehyde compounds of lanes and aromatic compounds of benzene, toluene, and styrene, chemicals were treated in the four-step impregnation process to increase the chemical bonding power to improve adsorption performance.

Such chemical adsorbents are prepared by treating chemicals on a support, and chemicals suitable for removing sulfur compounds of SOx, CH ₃ SH, H ₂ S and nitrogen oxides of NO, N ₂ O, and NO ₂ include KOH, NaOH, It is composed of alkali metal compound selected from KI and NaI and halogen group element of bromine and iodine, and the chemical is appropriate. To remove amine and ammonia, it is appropriate to treat chemical selected from citric acid, sulfuric acid, nitric acid and phosphoric acid. ₃ To remove the aldehyde compounds of CHO and nolane, the transition metal or alkali metal of Cu, Mn, Ni, Co is treated and chemicals with amine groups are treated. Aromatic compounds of benzene, toluene and styrene are removed by treating transition metals and alkali metals.

The above-mentioned chemicals were treated on the support obtained by carbonizing the polymer resin to evaluate the adsorption performance of nitrogen monoxide, ammonia and toluene in the adsorption performance evaluation apparatus.

Hereinafter, specific embodiments according to the present invention have been described, but the scope of the present invention is not limited to the embodiments.

Example 1

Preparation of the Support

The cation exchange resin, which is a crosslinked polymer polymer resin of polystyrene and divinylbenzene, is dried at room temperature in a first stage drying process to remove moisture, and then, in a second stage carbonization process, placed in an electric furnace and blown with nitrogen at 10 cc / min in an inert gas atmosphere. After heating up to 750 degrees Celsius at 10 degrees Celsius / minute and maintaining it at 750 degrees Celsius for 1 hour, natural cooling to room temperature and 3 steps of activation process followed by nitrogen injecting 10cc per minute in an inert gas atmosphere at 10 degrees Celsius / min. The temperature is raised to 750 degrees and the moisture containing steam at 750 degrees Celsius is added and maintained for 5 hours, followed by cooling to obtain a material for chemisorption and catalyst carrier.

Example 2)

Nitric Oxide Chemical Adsorbent

The support prepared in Example 1) was impregnated with an aqueous potassium iodide solution for about 1 hour and then dried at 120 to 150 degrees Celsius to prepare a chemical adsorbent. The supported amount of potassium iodide ranges from 0.1 to 10 wt% of the weight of the support. In order to evaluate the performance, the nitrogen monoxide adsorbent was packed in a fixed-bed reactor and nitrogen monoxide was flowed to measure the adsorption performance of nitrogen monoxide (see Figure 1).

Figure 1) Nitric Oxide Adsorption Curve

Example 3) Ammonia Chemistry

The support prepared in Example 1) was impregnated with an aqueous phosphate solution for about 30 minutes and then dried at 40 to 60 degrees Celsius to prepare a chemical adsorbent. The supported amount of phosphoric acid ranges from 0.1 to 30 wt% of the weight of the support. To evaluate the performance, the ammonia chemisorption was packed into a fixed bed reactor and ammonia gas was flowed to measure the adsorption performance of ammonia (see Figure 2).

Figure 2) Ammonia adsorption curve

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Example 4

Toluene Chemical Adsorbent

The support prepared in Example 1) was impregnated with a copper iodide solution for 1 hour to 24 hours, and then dried in a dryer at 110 degrees Celsius to prepare a chemical adsorbent. To evaluate the performance, toluene adsorption performance was measured by filling a toluene chemisorbent in a fixed bed reactor and flowing toluene gas (see Figure 3).

Figure 3) Toluene Adsorption Curve

As described above, the chemical adsorbent prepared by the present invention exhibits excellent performance in removing odors and harmful gases, has a spherical shape, and has a high strength and abrasion property, and has no property of dust blowing. It is easy to produce a filter or adsorbent that can control contamination.

Claims (6)

A chemical adsorbent prepared by treating a polymer obtained by carbonizing and activating a polymer resin, which is a crosslinked polymer of 0.01 mm to 5 mm of spherical polystyrene and divinyl benzene, through a carbonization process and an activation process. Polymerization, which is a cross-linked polymer of 0.01mm ~ 5mm spherical polystyrene and divinylbenzene, is operated at a temperature of 5 ~ 50 ° C for 1 ~ 5 hours at 700 ~ 900 ° C. After adhering the chemicals in the impregnation process to the support obtained through, and then drying them at 25 to 150 degrees Celsius in the drying process, the method for producing a chemical adsorbent. The method of claim 2, The polymer resin is a cross-linked polymer of the spherical polystyrene and divinyl benzene, characterized in that it comprises an ion exchange resin. The method according to claim 2, wherein the active gas used in the activation process is carbon dioxide, oxygen and water vapor. The method of claim 2, wherein the chemical agent is a compound selected from alkali metal compounds selected from KOH, NaOH, KI, NaI, citric acid, sulfuric acid, nitric acid, phosphoric acid, Cu, Mn, Ni, Co containing a halogen group of bromine, iodine Method for producing a chemical adsorbent, characterized in that the selected transition metal compound. delete

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