Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture
Patent
1997-11-26
1999-12-07
Straub, Gary P.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
423237, 423230, 4232451, 423219, 4232391, 423247, 210749, 502300, 502307, 502312, 502324, 502325, 502309, 502335, 502345, 502402, 502406, 502416, 502417, 502507, 502439, 50252714, 50252715, B01J 2300, B01J 3407
Patent
active
059978295
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to an environment purifying material that adsorbs and decomposes harmful substances causing rank odors, pollution, turbidity and so forth, contained in air, water, soil and so forth, and with which the air, water, soil and so forth can be made pure.
TECHNICAL BACKGROUND
Methods by which harmful substances, rank odors and so forth, contained in gases such as air and exhaust gases are adsorbed and decomposed to make the gases pure are known to include a method in which they are caused to chemically react with chemicals such as acid, alkali and aluminum sulfate to remove them, a method in which they are adsorbed on adsorbents such as activated carbon and zeolite to remove them, a method in which they are masked with aromatics, and a method in which they are oxidized or burnt using catalytic particles of metals or metal oxides. Methods by which substances causing rank odors, pollution, turbidity and so forth, contained in water such as river water, pond water and waste water are adsorbed and decomposed to make the water pure are also known to include a method in which they are adsorbed on adsorbents such as activated carbon and zeolite, a method in which they are oxidized and decomposed using chemicals such as ozone, and a method in which they are decomposed by microorganisms.
As methods for producing porous structural materials containing adsorbent particles such as activated carbon and zeolite or particles of metals or metal oxides having a reactivity as catalyst (catalytic activity), the following methods are conventionally known.
One of them is a method in which particles such as particles of metals or metal oxides are mixed and the mixture is press-molded (a method called press molding). For example, Japanese Patent Application Laid-open (KOKAI) No. 50-30795 discloses a method in which 40 parts by weight of manganese dioxide, 20 parts by weight of cupric oxide and 40 parts by weight of gamma alumina are mixed and the mixture is formed into tablets.
Another method is a method in which a porous carrier or a porous structural material is impregnated with an aqueous solution of salts of metals such as manganese and copper, followed by baking (a method called baking or sintering). Materials used in such a method include, for example, a deodorizer comprising A-type zeolite incorporated with manganese oxide and copper oxide (Japanese Patent Application Laid-open (KOKAI) No. 1-151938), and a deodorizer comprising a honeycomb porous carrier supported with manganese dioxide and cupric oxide (Japanese Patent Application Laid-open (KOKAI) No. 4-156854).
Other methods are also known to include a method in which the adsorbent particles such as activated carbon and zeolite and/or particles of metals or metal oxides are mixed together with a binder and the mixture obtained is extruded by means of an extruder into stated shapes, followed by heating and activation to obtain porous particulate products (a method of extrusion molding with a binder), and a method in which the particles of metal oxides or the like are kneaded into a foamable thermoplastic resin, followed by heating to blow the resin into foams, which are used as deodorizing porous structural materials (a method of foaming), and so forth.
Methods for producing sheet-like deodorizers are also known to include a method in which a deodorizer powder and a thermoplastic resin powder are sprayed onto a substrate sheet made of paper or the like, followed by heating to bring them into an integral form (Japanese Patent Application Laid-open (KOKAI) No. 61-119269), and a method in which a mixture of a deodorizing powder for gas treatment and a thermoplastic resin powder is held between two layers of sheets at least one of which is an air-permeable sheet, followed by contact bonding to bring them into an integral form (Japanese Patent Application Laid-open (KOKAI) No. 5-49850), and so forth.
In the case when deodorizing porous structural materials are produced by the above pressure molding, the particles of metals or metal oxides
REFERENCES:
patent: 4665050 (1987-05-01), Degen et al.
patent: 5541147 (1996-07-01), Friedlander et al.
patent: 5662872 (1997-09-01), Shimada et al.
patent: 5883864 (1998-11-01), Miller et al.
English Abstract For DE 37 19 233 A Published Dec. 1988.
Kawada Hiroyuki
Miyadera Yasuo
Sekine Yoshika
Senda Takayuki
Tonoki Kenji
Hitachi Chemical Company Ltd.
Straub Gary P.
Vanoy Timothy C
LandOfFree
Environment purifying material does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Environment purifying material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Environment purifying material will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-820387