Catalyst for decomposition of ozone

[Detailed Description of the Invention]

Field of the Invention The present invention relates to the catalyst for ozone degradation, and it uses it for decomposition purification of the Drain ozone which arises in more detail in the apparatus which generates ozone, or the apparatus using ozone. PRIOR ART It ranks next to fluoride (F), since oxidization power is large, it is used in a wide range of fields, such as inside of the air, underwater sterilization, deodorization, and bleaching, however ozone becomes harmful [ a small quantity ] for Motion and a plant. For example, condition, such as giddiness headache and nausea, is seen also by 0.1 ppm existence 1- in the air, and it is necessary to purify even a little ozone which occurs from a copying machine. As for ozone purification Finance, there are some etc. which used together both who are looked at by activated carbon, a metal oxide, and JP,63-31253,B. An invention is solution l. - Subject made like However, it is a thing using the depurator using activated carbon being also itself purified, when ozone oxidizes activated carbon, Although a manganese oxidation thing, oxidization 2 and Sokel, cobalt oxide, iron oxide, etc. are known as an ozone purification catalyst as an one side metal oxide with the fault to which purification performance falls with time progress, Ozone purification speed is slow, shape is restricted granular, or it is into Work at the degree of low temperature, or high humidity. - It was sufficient and there was a fault to carry out. The present invention provides a highly efficient ozone purification catalyst. High performance is maintained over a long time also by the degree of low temperature, and high humidity, and a cheap catalyst which can respond to any shape is provided. Means for solving problem the present invention would not introduce a titanium dioxide into composition of having hardened the manganese oxidation thing by the cement agent -- Stone Ding introduction would not be carried out -- it consists of either of three compounds of what introduced both a titanium dioxide and gypsum. Although the compound to MnO+ and s~Mno2 has ozone purification performance, as a lump of a manganese oxidation thing, manganese dioxide etc. which are made by the electrolyzing method are one of manganese oxidation things. however, these -- each -- specific surface area -- small -- 10 -- it performance cannot be demonstrated. In order to enlarge specific surface area, it is necessary to grind finely but, and if powdered, it is hard to use it. So, in the present invention, the method of molding a pulverization manganese oxidation thing and combining, using a cement agent as a binder, was found out. Introducing the compounds (manganese nitrate, manganese sulfate, etc.) which can turn into a manganese oxidation thing into a manufacturing process, of course at this time also has the same effect. Next, a titanium dioxide, gypsum, or its both are introduced into this composition. It is a compound with large specific surface area, and a pole diameter also has a peak in 102~103 persons, and each of these brings about an effect important for improvement in ozone purification performance. Specific surface area is large and the thing of purification performance with a Anatase type crystal structure is [ a titanium dioxide ] high. Although each cement of the hydraulic property of Al Min acid lime, portland cement, etc. is effective as a cement agent which a stone and 11 become porosity at the time of the dryness after being kneaded with water, and produces large specific surface area, When molding in honeycomb shape etc., the molding auxiliary agent of an organic system is indispensable, and needs to process this molding auxiliary agent by a manufacturing process. At this time, heat treatment by 300~500 degreeC is effective, and the Al Min acid lime which has heat resistance is excellent. It is necessary to take into consideration three points, intensity, initial purification performance, and life performance, as a compounding ratio. It is necessary to limit the cement agent to a small quantity in the range which intensity allows, and the loadings of a titanium dioxide and gypsum determine that the range from which purification performance becomes a peak is the optimal. Improvement in the life performance in low temperature was attained by adding one or more sorts of metal oxides 2~10% of the weight to these systems out of the group of copper oxide, iron oxide, oxidization 2, Sokel, and cobalt oxide. OPERATION Ozone causes a reaction as shown in a following formula by operation with a metal oxide, and is changed into oxygen. 0 +M-02+M-0 ...... ■0 +M-0-2024M ...... ■20+M-30□+M Inside ... ■+■ -- M shows a metal oxide by this equation -- especially a manganese oxidation thing is a Can increase oxide, and it knows between MnO2~MnOts(es) well as an ozone purification catalyst. However, in order to catch the ozone in the air, to cause a reaction and to emit into the air again as oxygen, it is necessary for ozone to enter moreover in the shape which is easy to capture ozone, and to have Chewy fine pores and big specific surface area. Only by the shape of a grain, or a powdered manganese oxidation thing, that actual use cannot be presented, in order to have enlarged specific surface area, the method of pulverizing into fine powder more is effective, and it took the composition which combines powdered manganese oxide by a cement agent by the present invention. However, the fine-pores characteristic which only the manganese oxidation thing and the cement agent have is still insufficient for ozone purification with the degree of low temperature, and it has a peak of fine pores near 102~10. Beam, and is Drawing 1 about introduction of a titanium dioxide with big specific surface area, or gypsum. On the other hand, it is also effective to introduce the compound which changes to a manganese oxidation thing by heat treatment like manganese nitrate or manganese sulfate, etc. in the big composition of such specific surface areas. Although it was thought as a metal oxide that many things had ozone purification performance besides a manganese oxidation thing, as a result of considering introduction of other metal oxides in the system of the present invention, copper oxide, iron oxide, cobalt oxide, oxidization 2, and Sokel were effective at the synergistic effect with a manganese oxidation thing. EXAMPLE Example 1 The result of examination which changed the compounding ratio of Al Min acid lime, a manganese oxidation thing, and a titanium dioxide is shown. As for Al Min acid lime, the amount of alumina used [ lime ] 40% or less of thing at 60% or more. The thing with an average particle diameter of 6 micro was used for the manganese oxidation thing in the pulverization article of r-MnO□. The titanium dioxide had a Anatase type crystal structure, and the thing of specific surface area 6 otdy"l was used for it. The process mixed each powder, kneaded it with a proper quantity of water, and heat-treated by after-molding 300-degreeC in the shape of [ of 6phi silk ] beret lithograph. Measurement of performance is S, V, 60% of 30000Hr-1 and temperature [ of 6 degrees ] C1 humidity, and entrance 03. The purification rate of the ozone in concentration 3 ppm was measured. & 1 was not able to carry out performance measurement of the 1 intensity weakly. & Since a purification rate of 3 is low since the titanium dioxide is not contained, and cliff 8 has too many titanium dioxides, a purification rate is low Or-It was. Beam 9 has low ~ A little performance with much Al Min acid lime. Example 2 Next, the result of examination which changed the compounding ratio of Al Min acid lime, a manganese oxidation thing, and gypsum is shown. The process and the appraisal method are the same as operation 81J1, and gypsum used Class A baking gypsum. (Following space) The performance measurement of the 1 intensity can be carried out weakly, and ilo(es) are inside - and It was. Since 416 had too much 1 gypsum, its purification rate was low. Al Min acid lime of Tight 17 increases in number, and its performance is somewhat low. Example 3 Next, the result of examination which changed the compounding ratio of Al Min acid lime, a manganese oxidation thing, gypsum, and a titanium dioxide is shown. The process and the appraisal method are the same as Example 1. (Following space) By using together a stone and ■, and a titanium dioxide, improvement in sex eta To was found rather than having used independently. Example 4 Next, in combination of Engineering 23, the half amount of the manganese oxidation thing was mixed in the form of manganese nitrate, and it molded similarly, and obtained the sample of 27 for Heat contamination to 7 by 300 *C]-7. The result of the same evaluation as Example 1 became purification rates 96/8, and showed Beam 23 and homogeneous ability. Example of real gun 6 Next, examination which adds other metal oxides to combination of Tight 23 was performed. Each metal oxide was invested in powder material in the form of the nitrate. Combination oil showed at the rate the weight in the state where it changed to the oxide for 100 minutes. Process. an appraisal method -- an example -- it took 1 When for it being the same. (Following space) As for any metal oxide, 2~10 copies of addition effects of 1 were accepted. Next, the performance comparison with activated carbon and the manganese dioxide grain is shown. Activated carbon used Granulated coal of 6phi Tomorrow. Manganese dioxide crushed electrolysis manganese dioxide and used one-lot the thing of about 61 tII. It is the same as the method shown in Example 1, and evaluation of performance is measurement of initial performance. - S, V. 30000Hr The purification rate (extraction ratio) of the ozone in ', temperature 6degreeC, 60% of humidity and entrance 0, and concentration 3 ppm was measured. The life performance did the continuous test on condition of these -11, and measured the performance in the 1o0hr and 1000hr time. (Following space) A (although 36 is 1 Beam 29 and the combination, - Bi 1.1000 molds it into the honeycomb structure which is 211M.) From this result, although activated carbon is good the first stage, the inside of a long time understands that performance falls rapidly for it. It turns out that JFL6~JK36 maintains performance satisfactorily in the example of the 5 present invention for a long time. EFFECT OF THE INVENTION a ratio with a highly efficient big ozone purification catalyst by the present invention -- it has a table +ii product and can maintain high performance over a long period of time also by the degree of fine-pores rich person 1 Am low temperature advantageous to absorption purification of ozone gas again, and high humidity. It can respond to any shape and can provide cheaply.