CN1054014A

CN1054014A - Ozone removal and separating catalyst and their preparation method and application

Info

Publication number: CN1054014A
Application number: CN 90106857
Authority: CN
Inventors: 黄振钧
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-08-22
Filing date: 1990-08-22
Publication date: 1991-08-28
Anticipated expiration: 2005-08-22
Also published as: CN1025532C

Abstract

Ozone removal and separating catalyst and their preparation method and application.

The invention relates to a kind of removal and the catalyst that separates ozone, it comprises cupric oxide and manganese dioxide, and with porous ceramics, through type or foamed ceramic and porous fibre are made carrier as chemical fibre, glass fibre and sponge etc.Be characterized in not adding precious metal, thereby low price, be suitable for all and need remove and the place of separating ozone.This product can be made shapes such as sheet, circle, sphere.

Description

Ozone removal and separating catalyst and their preparation method and application

The invention relates to a kind of ozone and remove and separating catalyst, especially, ozone can be removed and separate to this catalyst from ozone-containing air, and these Preparation of catalysts methods and applications, and international Patent classificating number is B01J23/84.

In the prior art, from gas ozoniferous, the method for for example removing ozone in the air is a lot, comprises that (1) use up or the method for thermal release ozone; (2) use chemical solution, for example method of sodium sulphate aqueous slkali; (3) use separating catalyst, for example, active carbon, the mixture of active carbon and silica gel and zeolite commonly used and metal oxide.In said method, (4) are the most frequently used, but a problem using active carbon to be easy to produce is that carbon and ozone reaction produce carbon monoxide and carbon dioxide.

Also can use metal oxide as separating catalyst, the metal that ozone is decomposed is a lot, and some noble metals and divalent metal belong among this type of, as platinum, and rhodium, palladium, cobalt, lithium, copper, manganese, aluminium, iron etc.At BP 2,037,605, GB-2,056,424, GB2,089,671, GB2,142,324, and U.S. Pat-4,173,549, US-4,262,863, US-4, introduced in 459,269 and used metal oxide to remove the example of ozone as separating catalyst, above-mentioned document at this by with reference to introducing.They all have a common feature is exactly to make pastel with metal or metal oxide to do clean forming, or form as carrier with aluminium oxide, for improving the ozone decomposition ability, added precious metal or metal oxide, the common issue with that they exist is exactly that cost is too high, and makes complicated.

One of purpose of the present invention is to overcome the defective that above-mentioned prior art exists, and proposes a kind of new ozone and separates and remover, and it can remove the ozone in gas effectively.

Two of purpose of the present invention is to propose a kind of ozone to separate and remove the Preparation of catalysts method, uses it can be rapidly and prepare catalyst economically.

Other purpose of the present invention and advantage will be set forth further by following description.

According to the present invention, removal of the present invention is characterized in that containing manganese oxide and/or cupric oxide with the catalyst that separates ozone, and uses porous ceramics to make carrier, has 1～100m ²The specific surface of/g, 200～800 hole/inches ²Porosity, and in its pore-size distribution, the aperture is evenly distributed in the scope of 0.5～10 μ m.

Further, the content of cupric oxide is 0.1～10wt% in this catalyst, and the content of manganese dioxide is 0.1～10wt%, and preferably the content of cupric oxide is 0.5～8wt%, and the content of manganese dioxide is 0.4～7wt%.Carrier can be through type or foamed ceramic, also can adopt porous fibre, as chemical fibre, and glass fibre or sponge.

Further, catalyst of the present invention preferably has 1～50m ²The specific surface of/g, 300～700 hole/inches ²Porosity, and in its pore-size distribution, the hole is in the scope that is evenly distributed in 1～10 μ m.

Removal of the present invention prepares as follows with the catalyst that separates ozone.

At first carrier (pottery etc.) being immersed concentration is in the pure sour manganese of commercially available analysis and/or copper nitrate solution of 50～75wt%, soak time is not limit, promptly go out after can soaking, be more than ten hour, take out then, toast in temperature is 100～250 ℃ of scopes, stoving time is 3～10 hours, preferably 3～8 hours.At this moment be covered with manganese dioxide in carrier surface and the micropore and/or cupric oxide is made catalyst with ozone decomposition, its shape can be made different shapes such as slabbing, garden shape, sphere, Cylinder on demand, its thickness is decided by the ozone concentration height, be generally 1mm～10cm, for prolonging catalyst life, can filter dust with sponge.After the regeneration of catalyst can be embathed with ethanol, oven dry can be answered newly, reuses.

Catalyst of the present invention can also prepare with the described method of the prior art of routine, and for example the method for using with step sequence of the prior art prepares, the only reinforced difference that waits.Typically, can be with reference to Japan Patent 87-32,354 and 87-150,112,, introduced centrifugal flow cladding process commonly used, pressed disc method, extrusion molding, the Marmerizer method of forming, roll extrusion granulation, pill method here.The present invention can also with porous fibre carry manganese dioxide and/method of cupric oxide powder is prepared into catalyst.

The following example will illustrate in greater detail the present invention, though the present invention is not limited to these, this professional those of ordinary skill can be made many variations according to this, all should manage Jie within category of the present invention.

Example one

With hole originally is 300 hole/inches ²Pore-size distribution is that the commercially available pure concentration of analysis of pottery immersion of 1～10 μ m is in the manganese nitrate and copper nitrate solution of 65wt%, promptly take out after soaking, baking is 4 hours in temperature is 200 ℃ baking oven, takes out, and manganese dioxide and cupric oxide at this moment gather in ceramic surface and the micropore, after measured, the two content is respectively 8wt% and 6wt%, is made into the garden sheet of thick 5mm, and it originally is 95% that ozone is removed.

Example two

With hole originally is 400 hole/inches, and pore-size distribution is 2～8 μ m specific surface 15m ²It is in the manganese nitrate or copper nitrate solution of 68wt% that porous ceramics that/g is immerses the commercially available pure concentration of analysis, after promptly take out, baking is 5 hours in temperature is 210 ℃ of baking ovens, takes out, after measured, content is 10wt%, is made into sphere, it originally is 90% that ozone is removed.

Example three

With hole originally is 500 hole/inches ², pore-size distribution is that 2～8 μ m specific surfaces are 15m ²It is in the manganese nitrate and copper nitrate solution of 75wt% that/g general fine immersed the commercially available pure concentration of analysis, promptly take out after soaking, and be 250 ℃ baking 6 hours in temperature, take out, after measured, content is respectively 4wt% and 5wt%, is made into the garden cylindricality, and it originally is 93% that ozone is removed.

Example four

With hole originally is 400 hole/inches ², pore-size distribution is that 1～10 μ m specific surface is 18m ²It is in the nitre phenol copper solution of 50wt% that the pottery of/g immerses the commercially available pure concentration of analysis, and baking is 4 hours when temperature is 250 ℃, takes out, and after measured, content is 10wt%, is made into sphere, and it originally is 94% that ozone is removed.

Have the specific surface that the present invention retouches out in order to produce, the catalyst that porosity, pore-size distribution and repeatability are good can be played the part of end time material particles at the preparation catalyst and be added polyvinyl alcohol, and materials such as stearic acid perhaps increase the weight of it in catalyst fines when the moulding.When needing to adopt whisker or glass fibre under the less situation of degree of grinding.Can adopt the binding agent as powder such as water, fiber etc., ammonium nitrate, graphite and starch.Also can use ethanol, acetone and other organic solvent.

With remove effectively of catalyst of the present invention with separate ozone ozone and remove and originally can obtain 95%.

The present invention can be applied to all equipment that need remove ozone and places, when for example Xerox is adorned ozone generator, and refrigerator, duplicator, cinematographic projector, colour television set, between studio's vehicle of sterilization, coreless induction furnace, ultraviolet lamp cable factory, the tail gas of ozone treatment sewage etc.

Claims

1, a kind of removal and the catalyst that separates ozone is characterized in that containing manganese oxide and/or cupric oxide, and it uses porous mass to make carrier, has 1-100m ²The specific surface of/g, 200-800 hole/inch ²Porosity, and in its pore-size distribution, the aperture is evenly distributed in the scope of 0.5-10 μ m.

2, catalyst as claimed in claim 1, the content that it is characterized in that cupric oxide is 0.1-10wt%, and the content of manganese dioxide is 0.1-10wt%, and preferably the content of cupric oxide is 0.5-8wt%, and the content of manganese dioxide is 0.4-7wt%.

3, catalyst as claimed in claim 1 is characterized in that carrier can be through type or foamed ceramic, also can adopt porous fibre, as chemical fibre, and glass fibre or sponge.

4, catalyst as claimed in claim 1 is characterized in that it preferably has 1-50 μ m ²The specific surface of/gram, 300-700 hole/inch ²Porosity, and in its pore-size distribution, the aperture is evenly distributed in the scope of 1-10 μ m.

5, Preparation of catalysts method as claimed in claim 1, it is characterized in that carrier is immersed in the commercially available manganese nitrate and/or copper nitrate solution that concentration is 50-75wt%, take out then, in temperature is 100-250 ℃ scope, toast, stoving time is 3-10 hour, preferably 3-8 hour.

6, Preparation of catalysts method as claimed in claim 5 is characterized in that: be covered with manganese dioxide and/or cupric oxide in carrier surface and the micropore and make catalyst with ozone decomposition.

7, catalyst as claimed in claim 1 is characterized in that manganese dioxide and/or cupric oxide and carrier can be made into sheet shape together, garden shape, sphere, different shapes such as garden cylindricality.