5552128 Selective catalytic reduction of nitrogen oxides

5552128 Selective catalytic reduction of nitrogen oxides

PatentsALERT least one other adsorbent adsorbs organic compounds. The adsorbent is provided in containers, each of which has an inlet and outlet prov...

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least one other adsorbent adsorbs organic compounds. The adsorbent is provided in containers, each of which has an inlet and outlet provided with conduit coupling means, and conduits interconnect the containers in a series flow path relationship. The container that first receives the effluent becomes exhausted first, and the container receiving the effluent last is the least exhausted. As a container becomes exhausted, a fresh container is substituted and appropriate conduits are connected so that the fresh container becomes the last container.

5552062 METHOD FOR TREATMENT OF WASTE WATER CONTAMINATED WITH CYANIDE ION Stevenson Sanford M McMurray, PA, UNITED STATES A method for treating waste water contaminated with cyanide ion, such as mine acid water is provided. The apparatus is readily portable and comprises a reaction vessel having an aerator motor operatively associated therewith. Water to be treated is received within said reaction vessel and is treated by having a neutralizing agent by way of chemical pumps and oxidant by way of the aerator introduced simultaneously into the system. Because of instantaneous elevation of pH resulting from the simultaneous introduction of oxidant and the neutralizing agent, the reaction time is greatly reduced and the equipment required is small, compact and easily transported. Where concentrations of manganese are present in the waste water being treated in this process, it is preferred that those manganese concentrations be reduced before the method of the present invention is initiated.


5552128 SELECTIVE CATALYTIC REDUCTION OF NITROGEN OXIDES Chang Clarence; Santiesteban Jose G; Shihabi David; Stevenson Scott; Vartuli James C Princeton, NJ, UNITED STATES assigned to Mobil Oil Corporation There is provided a catalytic method for converting nitrogen oxides to nitrogen (i.e., N2). The catalyst for this method comprises an acidic solid component comprising a Group IVB metal oxide modified with an oxyanion of a Group VIB metal and further comprising at least one metal selected from the group consisting of Group IB, Group IVA, Group VB, Group VIIB, Group VIII, and mixtures thereof. An example of this catalyst is zirconia, modified with tungstate, and iron. This method may be used for reducing emissions of nitrogen oxides from waste gases, including industrial exhaust gases and automobile exhaust gases. In a particular embodiment, nitrogen oxides in waste gases may be reacted with ammonia before the waste gases are discharged to the atmosphere.

5552130 PROCESS FOR THE CONTINUOUS PREPARATION OF NITROSYL CHLORIDE Kraus Helmut; Klausener Alexander; Landscheidt Heinz Odenthal, GERMANY assigned to Bayer Aktiengesellschaft The reaction of nitrogen dioxide with hydrogen chloride to give nitrosyl chloride and nitric acid can be advantageously carried out in cocurrent in a reactor in such a way that the reactants are introduced at the bottom and the nitrosyl chloride is taken off at the top and the nitric acid is taken off at the bottom of the reactor.

5552172 Lajoie M Stephen; Sargent Robin C Basking Ridge, NJ, UNITBD STATES assigned to Church & DwightCo Inc This invention provides a process for producing a particulate potassium bicarbonate composition which maintains its free-flow properties when stored under ambient temperature and relative humidity conditions. In the process, particulate potassium bicarbonate is blended with fine grain alkaline earth metal oxide, and the oxide is microdispersed on the surface of the particles. The oxide reacts with moisture and carbon dioxide to form an adherent physically-bonded coating of alkaline earth metal carbonate on the surface of the potassium bicarbonate particles. The altered particle surface prevents agglomeration of the potassium bicarbonate particles.

MULTI-DECK CLAMSHELL COOKING AND STAGING PROCESS Liebermann Benno E Louisville, .KY, UNITBD STATES The present invention is directed toward a method for transferring heat to food articles for cooking or staging ensuring bacteriological safety in the fast food production of hamburgers and other protein or farinaceous food articles. The process provides a means to initially cook frozen food articles sealed in heat conducting containers, such as a flexible pouch to cook raw food articles or previously cooked food articles, and to stage same for J. Cleaner


1997, Volume

5, Number