CATALYST COMPOSITION FOR REDUCTION OF NOX, ITS PRODUCTION AND REDUCING METHOD FOR NOX IN EXHAUST COMBUSTION GAS CONTAINING OXYGEN

    公开(公告)号:JPH1099684A

    公开(公告)日:1998-04-21

    申请号:JP25408197

    申请日:1997-09-04

    Applicant: BASF AG

    Abstract: PROBLEM TO BE SOLVED: To provide catalyst composition by which oxidation of SOx in exhaust combustion gas containing oxygen is mostly avoided and also NOx is reduced. SOLUTION: TiO2 , WO3 and V2 O5 are contained in the catalyst composition for reduction of NOx . Distribution of pore diameter at least on both sides is in the ranges within 5-30nm and 45-100nm. V2 O5 is mainly distributed in the whole of larger pore in the distribution of pore diameter at least on both sides. In a method for producing the catalyst composition, firstly TiO2 , WO3 and an arbitrary additive are kneaded/mixed. V2 O5 or its precursor is dissolved in a solvent. The obtained solution is mixed with an organic polymer. Then, the solution mixed with the above-mentioned polymer is mixed with the first mixture. The produced composition is molded, dried and burned.

    CATALYST AND ITS MANUFACTURE AND USE THEREOF

    公开(公告)号:JPH09173847A

    公开(公告)日:1997-07-08

    申请号:JP35936496

    申请日:1996-12-12

    Abstract: PROBLEM TO BE SOLVED: To improve purifying effects of NOx in exhaust gas of internal combustion engine in a catalyst comprising spinel including copper, zinc, and aluminum by adding predetermined rare earth element or the like to specific copper oxide- zinc oxide-aluminum oxide spinel. SOLUTION: This catalyst, which is suitable for purifying NOx in exhaust gas produced by a Diesel engine or thin mixture engine, is composed of spinel including copper, zinc, and aluminum, in which copper oxide-zinc oxide-aluminum oxide spinel represented by the formula CuAZnBAlCO4 is used. And palladium, platinum, rhodium, ruthenium, osmium, iridium, rhenium, a rare earth element such as lanthanum or cerium, vanadium, titanium, molybdenum, tungsten, or salts thereof or oxides thereof are added to the spinel. In the formula, A+B+C 0, B>0, C>0.

    METHOD FOR PRODUCING ESTERS OF MULTIBASIC ACIDS

    公开(公告)号:CA2428575C

    公开(公告)日:2010-01-12

    申请号:CA2428575

    申请日:2001-11-13

    Applicant: BASF AG

    Abstract: The invention relates to a method for producing esters of an acid component chosen from the multibasic C4-C10-carboxylic acids and an alcohol component chosen from C3-C12-alkanols or -alkanediols whose alkyl chain can be interrupted by 1 to 3 oxygen atoms. Sad method comprises the following steps : a) a mixture consisting essentially of the acid component or an anhydride thereof and the alcohol component is heated to boiling in a reaction zone in the presence of an esterification catalyst; b) the vapours containing alcoho l and water are separated into a fragment that is rich in alcohol and a fragme nt that is rich in water by rectification; and c) the alcohol-rich fraction is fed back into the reaction zone, while the water-rich fraction is extracted from the process. The inventive method is simple to carry out and allows the rapid adjustment of an essentially quantitative conversion.

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