Manganese compound, process for producing the same, and method of utilization of the same

• US 20050214199A1
• Filed: 07/26/2002
• Published: 09/29/2005
• Est. Priority Date: 07/26/2002
• Status: Abandoned Application

• Current Assignee: Sued-Chemie Catalysts Japan Incorporated (Clariant AG)
• Original Assignee: Sued-Chemie Catalysts Japan Incorporated (Clariant AG)
• Inventors: Hayashi, Nobuyoshi, Wada, Hiroshi, Shioya, Yasushi
• Application Number:
  US10/522,029
• Publication Number:
  US 20050214199A1
• Time in Patent Office: Days
• US Class Current: 423/599
• CPC Class Codes: B01D 2253/10 Inorganic adsorbents
• CPC Class Codes: B01D 2253/306 Surface area, e.g. BET-specific surface
• CPC Class Codes: B01D 2257/302 Sulfur oxides
• CPC Class Codes: B01D 2257/404 Nitrogen oxides other than dinitrogen oxide
• CPC Class Codes: B01D 2257/702 Hydrocarbons
• CPC Class Codes: B01D 2257/708 Volatile organic compounds V.O.C.'s
• CPC Class Codes: B01D 2257/90 Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708
• CPC Class Codes: B01D 2258/00 Sources of waste gases
• CPC Class Codes: B01D 53/02 by adsorption, e.g. preparative gas chromatography solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01
• CPC Class Codes: B01D 53/86 Catalytic processes
• CPC Class Codes: B01J 23/34 Manganese
• CPC Class Codes: B01J 35/615 100-500 m2/g
• CPC Class Codes: B01J 37/03 Precipitation; Co-precipitation
• CPC Class Codes: C01G 45/02 Oxides; Hydroxides
• CPC Class Codes: C01G 45/12 Manganates manganites or permanganates
• CPC Class Codes: C01P 2006/12 Surface area
• CPC Class Codes: Y02A 50/20 Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

A manganese compound exerting a higher environmental pollutant removal performance than that of a conventional manganese oxide is provided. The manganese compound is obtained by mixing and reacting a bivalent manganese salt aqueous solution and a permanganate alkaline aqueous solution containing a quantity of an alkali larger than a stoichiometric quantity. When comparing the manganese compound with an already-known manganese oxide, it is determined that a specific surface area has significantly increased, and the environment pollutant removal performance is significantly improved. The manganese compound according to the present invention has a high specific surface area value and a high environment pollutant removal performance, and is useful in the adsorption and oxidation-removal of the odor components discharged from factories, NOx, SOx, VOC, and the unburned components such as hydrocarbons, aldehydes and the like which are generated by incomplete combustion.

Claims

1. A manganese compound wherein 1 to 10% of an alkaline substance is incorporated into a structure thereof and a BET surface area is 300 m²/g or more.

5. A method of removing environmental pollutants in a gas by allowing the gas containing the environmental pollutants to pass through a manganese compound according to claim 1.

2. A method of producing a manganese compound wherein an alkali compound and a permanganate are mixed into a bivalent manganese salt aqueous solution under being stirred to produce precipitates by reaction, and the precipitates are filtered after sufficient washing, and then dried,

which is characterized in that a quantity of the alkali compound is larger than a stoichiometric quantity to a permanganate.

3. A method of producing a manganese compound according to claim 2, characterized in that an added quantity of an alkaline compound to a permanganate is in the range of higher than 1.0 but 4.0 or less, when the added quantity is expressed in a mol ratio to an alkaline permanganate of 1 mol.

4. A method of producing a manganese compound according to claim 2, characterized in that a drying temperature is 100 to 200°

C.