baber/WOPTO huggingface dataset:
Patent FI-115225-B (FI)
Inventor: DRUMMOND DONALD KENDALL
IPC: D21C9/10
Filed: 1997-06-13
Granted: 2005-03-31
Abstract: A method of improving the brightness of calcium carbonate filled paper. The filled paper is dried and then bleached with an aqueous solution of a bleaching agent. The process may be used on all grades of paper that contain filler and is particularly useful in the bleaching of low brightness grade papers that are produced from mechanical pulp that contain calcium carbonate.
Patent FI-110855-B (FI)
Inventor: MATONIEMI MARKKU
IPC: B62B3/00
Filed: 1997-07-30
Granted: 2003-04-15
Abstract: A roll container includes two rear, vertical, tubular profiles (5) formed with respective U-section recesses (12) which guide respective vertical, lateral rods (10) of a vertically displaceable rear gate. At one or each of vertical edges of the rear gate is provided a latching system including a latch consisting simply of a particularly shaped coil spring (30) including two co-axial coil sections (31) linked by a U-shaped section (32) and having respective end arm sections (33) parallel to each other. The spring (30) is of a size and shape that its sections (31 and 33) fit relatively snugly into rectangular corners of the profile (5). Formed through the wall of the profile (5) bounding the recess (12) is a U-shaped, curved slot (35) through both sides of which the horizontal central portion (32') of the section (32) extends. A shallow notch (18) pressed into the exterior of the rod (10) can releasably receive the portion (32') to latch the rod (10) relative to the profile (5).
Patent HU-207936-B (HU)
Title: Method for producing foodstuffs preparation suitable for human consumption bgeing equal with meat and having vegetal protein content
Inventor: HORVATHNE DR SZABO ERZSEBET
IPC: A23L13/00
Filed: 1990-04-02
Abstract: A food prod. which is comparable to all-meat mixts. is based on plant protein and contains (all pts. wt.): 1 soya, granulated, being soaked in 2 water pref. contg. salt and paprika powder, for at least two hours, and squeezed out after soaking. Of this squeezed out granulate sufficient to correspond to 1 pt. dry wt. is added to 0.8-1.5 minced pork, 1-2 raw unpressed lard or to 1 raw and 1 prepd. lard. - The mixt. is agitated and spices, e.g., garlic, salt, red paprika powder ground pepper, caraway-seed, are added. The mixt. is homogenised filled in sausage skins, allowed to stand for 3-6 hours and smoked at 5-10 deg. for 12-24 hours. Finally, the prod. is desiccated to contain less than 45% water, during a 8-12 days' peri
Patent HU-193267-B (HU)
Inventor: SCHADE WERNER
IPC: G01N33/02
Filed: 1982-07-16
Abstract: DIE ERFINDUNG BETRIFFT EIN VERFAHREN UND EINE VORRICHTUNG ZUM NACHWEIS VON KONTAMINATEN IN DER LEBENSMITTELINDUSTRIE DURCH DIREKTE PROBENAHME UND KULTIVIERUNG DER IN DEN PROBEN ENTHALTENEN MIKROORGANISMEN. ZIEL DER ERFINDUNG IST ES, DEN ARBEITS- UND GERAETETECHNISCHEN AUFWAND ZU REDUZIEREN, OHNE DIE SICHERHEIT DER AUSSAGE ZU VERRINGERN. DER ERFINDUNG LIEGT DIE AUFGABE ZUGRUNDE, EIN VERFAHREN ZU ENTWICKELN, NACH DEM DIE BEARBEITUNGSZEIT DER PROBE UND DIE ZAHL DER ARBEITSSCHRITTE DADURCH VERRINGERT WERDEN, DASS IN EINER VORRICHTUNG ENTNAHME- UND KULTIVIERUNGSSYSTEM VEREINIGT SIND. DAS VERFAHREN IST DADURCH GEKENNZEICHNET, DASS DIE UNTERSUCHUNGSPROBE MIT HILFE EINES VORBESTIMMTEN UNTERDRUCKES ODER DURCH KOLBEN IN DAS KULTIVIERUNGSGEFAESS GELANGT, MIT EINEM NAEHRMEDIUM VERMISCHT WIRD UND WAEHREND DER KULTIVIERUNG BEI GASBILDUNG DURCH DIE UNTERSUCHUNGSORGANISMEN AEQUIVALENTE MESSBARE MENGEN AN NAEHRMEDIUM-KEIMSUSPENSION AUSFLIESSEN. GLEICHZEITIG NEBENEINANDER SIND WACHSTUM, SAEUREBILDUNG UND GASBILDUNG DER KONTAMINATIONSORGANISMEN BEWERTBAR. DIE KANUELE DES KOMBINIERTEN PROBENAHME-KULTIVIERUNGSGEFAESSES IST DAZU ALS ANSAUG- UND AUSLAUFSTUTZEN AUSGEBILDET. IN EINEM GESONDERTEM GLASGEFAESS SIND AUSSERHALB DES KULTIVIERUNGSGEFAESSES EIN ODER MEHRERE FESTE NAEHRMEDIEN VOM FLUESSIGEN NAEHRMEDIUM GETRENNT ANGEORDNET.
Patent HU-193610-B (HU)
Inventor: MESZAROS LAJOS
IPC: G01V3/10
Filed: 1985-09-06
Abstract: A találmány süllyedésmérő készülék talajok, talajrétegek elmozdulásának mérésére, amellyel tetszőleges pontban és időpontban lehet mérni az erőhatás következtében előálló elmozdulásokat. A süllyedésmérő készüléknek indukációs tekercsből (3) kialakított szondája (4), ahhoz elektromosan csatlakoztatott^az induktivitás változását hang és/vagy fénnyel jelző kijelzőberendezése (7) van, a szonda (4) egy nem mágnesezhető anyagból (pl. műanyag) kialakított szondavezetőcsőben (1) van elhelyezve, a szondához mérőszalag (6) van rögzítve, a szondavezetőcsőre (1) egy vagy több mérőspirál (8) van feltűzve. A mérőspirálok (8) nem mágnesezhető anyagú, célszerűen ötvözött alumínium mérőspirálcsőből (9) ahhoz rögzített spirállemezből (10) vannak kialakítva. A mérőspirálcső (9) falában kiképzett horonyban (12) jelindító gyűrű (13) van elhelyezve. A mérőspirálok (8) lehajlására lehajtócső szolgál. (Jellemező 1. ábra.)  ® Lobra -1-
Patent HU-185748-B (HU)
Inventor: KALOCSAI ISTVAN
IPC: G01R13/32
Filed: 1982-11-04
Abstract: A találmány tárgya eljárás és áramköri elrendezés oszcilloszkópokban lévő fürészjelgenerátor automatikus indítására igen nagy frekvenciás jelek mérése esetén. A találmány szerinti megoldás lényege, hogy NORMÁL-üzemmódban megtartjuk a nagyfrekvenciás trigger jel figyelését és a fűrészjelgenerátort a trigger jellel indítjuk, míg AUTO-üzemmódban nem a nagyfrekvenciás trigger jelet figyeljük, hanem a fürészjelek visszafutását követő HOLD OFF jelet és a HOLD OFF jel végén — ha ebben az időpontban nem érkezik trigger jel - automatikusan indítjuk a fürészjelgenerátort a HOLD OFF jellel. A találmány szerinti megoldás előnye, hogy 20 Hz-300 MHz-ig indított üzemmódot biztosít és nem szinronizáltat, kvázi periodikus, jiíteres és frekvenciamodulált jelekkel indítva tökéletesen működik, AUTO-üzemmódban nem a bemenő nagyfrekvenciás jeleket figyeli, hanem a maximum 10-20 MHz-es kapujelet, ezért a nagyfrekvenciás áramköröket nem terheli, az áramkör lassúbb eszközökkel építhető fel, kivitele egyszerűbb, előállítása olcsóbb, mint az ismert megoldásoké. A kapcsolási elrendezésben bemeneti erősítő ellenálláson át csatlakozik egy másik és egy harmadik, erősítő bemenetére. A második erősítő egy szembe irányba kapcsolt diódán keresztül komparátorra csatlakozik. A dióda anódpontjára egy másik dióda anódpontja csatlakozik, amelynek katódpontja NAND kapura csatlakozik, amelynek egyik bemenete inverterre, a másik bemenete a komparátorra van csatlakoztatva.  -1-
Patent HU-203518-B (HU)
Title: Process for optical resolving (+)cys- or (+)trans-permetrinic acid
Inventor: NOHIRA HIROYUKI
IPC: C07C51/487
Filed: 1988-07-08
Abstract: A method for optically resolving (+/-)-cis or (+/-)-trans-permethric acid which comprises reacting (+/-)-cis-permethric acid and optically active 1-(p-tolyl)-ethylamine or optically active cis-N-benzyl-2-(hydroxymethyl)cyclohexylamine, or reaction (+/-)-trans-permethric acid and optically active 1-(p-isopropylphenyl)ethylamine, optically active 1-ethylbenzylamine or optically active cis-N-benzyl-2-(hydroxymethyl)cyclohexylamine.
Patent HU-186160-B (HU)
Title: Process for preparing azino-rifamycin derivatives
Inventor: FRANCESCHI GIOVANNI
IPC: A61K31/335
Filed: 1982-11-16
Abstract: There are provided azino rifamycin compounds of the formula (I): <IMAGE>  (I)  Y=H or CH3CO; R1 linear or branched C1-C7 alkyl or C3-C4 alkenyl- R2=linear or branched C1-C7 alkyl, C2-C4 chloroalkyl, C3-C4 alkenyl, Cycloalkyl having 3 to 7 C atoms in the ring, cycloalkyl alkyl having 3 to 6 C atoms in the ring, phenyl, or C7-C8 aralkyl, unsubstituted or mono-substituted by a halogen atom in the aryl group; or NR1R2=a cyclic moiety having 5 to 8 C atoms, unsubstituted or substituted by 1 or 2 CH3 groups, morpholino. The compounds inhibit the growth of gram positive bacteria and Mycobacterium tuberculosis. Oxidized compounds, preparative methods and pharmaceutical compositions are also described and claimed.
Patent HU-194049-B (HU)
Inventor: LAMATTINA JOHN L
IPC: A61K31/54
Filed: 1985-10-10
Abstract: Eine verbesserte entzuendungshemmende Zusammensetzung und ein Verfahren zur Behandlung von Entzuendungen, unter Verwendung einer Kombination eines entzuendungshemmenden Mittels (z. B. Indomethacin oder ein Oxicam) mit einem Histamin-H2-Antagonisten, ausgewaehlt aus der Gruppe, welche aus 2-Guanidino-4-(4-imidazolyl)thiazol, 2-Guanidino-4-(2-methyl-4-imidazolyl)thiazol, 2-(N-Benzyl-N-guanidino)-4-(2-methyl-4-imidazolyl)thiazol, 2-(N-Pentyl-N-guanidino)-4-(2-methyl-4-imidazolyl)thiazol und 2-Guanidino-4-(2-(hexylamino)-4-imidazolyl)thiazol besteht.
Patent HU-202769-B (HU)
Title: Continuous method for removing disulfides and mercaptans by extraction catalytic process
Inventor: BRICKER JEFFERY C
IPC: C10G19/08
Filed: 1987-12-15
Abstract: Reentry disulphides are eliminated in a continuous process for treating a sour hydrocarbon stream by extracting the mercaptans contained in the hydrocarbon stream 1 with a disulphide-free alkaline solution in an extraction zone 3, oxidizing the mercaptans to disulphides in the presence of an oxidation catalyst, in oxidation zone 6, separating a major portion of the disulphides from the alkaline solution at 9, reducing the residual disulphides in the alkaline solution to mercaptans and recycling the resulting substantially disulphide-free alkaline solution from the reduction zone 12 to the extraction zone 3. The reduction of the disulphides to mercaptans may be carried out by hydrogenation or by electrochemical reduction.
Patent HU-209999-B (HU)
Title: Jewellery chain
Inventor: ROZENWASSER DAVID
IPC: A44C11/00
Filed: 1989-11-07
Abstract: A rope chain has tightly interfitting rings (a, b, c) of a given cross-section diameter. Each ring has a small gap (40) slightly larger than its cross-section diameter to permit one ring to pass through the gap of a second ring, each of said rings having an inner diameter equal to just over X times greater than the ring cross-section diameter, where X is a number equal to or greater than 3. The rope chain is formed by a plurality of assemblies of said rings, in series, each assembly comprising X+1 rings, each ring of said assembly being angularly intertwined with an adjacent ring, each said assembly of rings comprising at least one ring oriented with its gap about 180 o  removed with respect of the gap of at least one other ring within said assembly. Each assembly of rings comprises at least one group of two or more adjacent rings having their gaps in the same orientation, said at least two or more adjacent rings being fixedly attached to each other, each of said at least one group of two or more adjacent rings being also fixedly attached to another ring having a gap orientation about 180 o  removed with respect of the gaps of the rings of said group of two or more adjacent rings, and the end ring of each assembly in the series enveloping the other rings of said assembly.
Patent IT-1241939-B (IT)
Title: Device for drawing passengers, in particular for chair lifts
Inventor: PABST OTTO
IPC: B61B/
Filed: 1990-06-28
Granted: 1994-02-01
Abstract: A device is described for drawing passengers, in particular for chair lifts, comprising a conveyor flanked to a station uphill and/or downhill from a chair lift and moved to bring every passenger at a relative speed reduced with respect to that of the chair lift. According to the invention, the conveyor is composed of a fixed guide 7, 8 on which a plurality of carriages 22, 18, 19, 20, 21 move, controlled to  be started on the basis of the entrance and/or exit 29, 30 of the passengers in/from the direction of the station and to be accelerated on the basis of the speed of the chairs. Each carriage 22, 18, 19, 20, 21 carries at least one drawing device 25, 26 which forms a grip for the passengers so that these are drawn on the skis they are wearing for example. <IMAGE>
Patent LT-3731-B (LT)
Title: Sulphonylcarbamide derivatives, process for preparing thereof, intermediates, herbicidal and plant growth preventing composition, method of undesirable plants growth control
Inventor: MEYER WILLY
IPC: C07D331/04
Filed: 1993-12-21
Abstract: N-phenylsulphonyl-N'-pyrimidinyl-, N'-triazinyl- and N'-triazolylureas and -thioureas of the formula I …<IMAGE>… in which … …  X represents oxygen, sulphur, SO or SO2; …  W represents oxygen or sulphur; …  R1 represents hydrogen or methyl; …  R<2> represents hydrogen, fluorine, chlorine, bromine, iodine, (X)nR3,NO2, NR4R5, - C IDENTICAL CR6, …<IMAGE>… …  or cyano; …  n represents the number 0 or 1; …  R3 represents C1-C4-alkyl, or C1-C4-alkyl which is substituted by 1-4 halogen atoms, C1-C3-alkoxy or C1-C3-alkylthio; C2-C4-alkenyl, or C2-C4-alkenyl which is substituted by 1-4 halogen atoms; …  R4 represents hydrogen, CH3O, CH3CH2O or C1-C3-alkyl; …  R5 represents hydrogen or C1-C3-alkyl; …  R6 represents hydrogen, methyl or ethyl; …  R7 represents hydrogen or methyl; …  Z represents or…<IMAGE>… …  E represents methine or nitrogen; …  R8 represents C1-C4-alkyl, C1-C4-alkoxy, C1-C4-haloalkoxy, C1-C4-haloalkyl, C1-C4-haloalkylthio, C1-C4-alkylthio, halogen, C2-C5-alkoxyalkyl, C2-C5-alkoxyalkoxy, amino, C1-C3-alkylamino or di-(C1-C3-alkyl)amino; …  R9 represents C1-C4-alkyl, C1-C4-alkoxy, C1-C4-haloalkoxy, C1-C4-haloalkylthio, C1-C4-alkylthio, C2-C5-alkoxyalkyl, C2-C5-alkoxyalkoxy, C2-C5-alkylthioalkyl or cyclopropyl; …  R10 represents hydrogen, fluorine, chlorine, methyl, trifluoromethyl, CH3O, CH3CH2O, CH3S, CH3SO, CH3SO2 or cyano; …  R11 represents methyl, ethyl, CH3O, CH3CH2O, fluorine or chlorine; …  R12 represents methyl, ethyl, CH3O, CH3CH2O, fluorine or chlorine; …  R13 represents C1-C3-alkyl; …  R14 represents C1-C3-alkyl, C1-C3-alkoxy, chlorine or OCHF2; … and the salts of these compounds; with the provisos that … …  E represents methine when R8 denotes halogen; and …  E represents methine when R8 or R9 denotes OCHF2 or SCHF2, … and the salts of these compounds with amines, alkali metal bases, alkaline earth metal bases or with quaternary ammonium bases have good selective herbicidal and growth-regulating properties pre- and post-emergence.
Patent LV-14116-B (LV)
Title: Gas condensing unit
Inventor: BLUMBERGA DAGNIJA
IPC: F28C3/00
Filed: 2010-01-06
Abstract: The invention pertains to thermal engineering, which proposes solutions for flue gas cooling and cleaning after woody fuel use in boilers. Its goal is increase of energy efficiency of heat energy production systems by improvement of heat and mass transfer conditions in gas condensing unit. Increase of contact surface and zoning of liquid, vapour, hard particle and gas flows allow to reach improvement of heat and mass transfer conditions. Gas flows through sprayed liquid curtain before inlet of gas condensing unit. Gas and vapour mixture is cooled by sprayed liquid which forms drops and sometimes films of liquid and condensate on the contact surface of packed (filling) layer. Second packed layer allows reaching more intensive condensing process, because temperature of sprayed liquid in the third spraying liquid system is lower than temperature of mixture of liquid and condensate in packed layer. Third packed layer in outlet of gas flow plays role of separator of drops from gas flow. Liquid and condensate together with hard particles come down to conical collector in bottom of gas condensing unit. Sedimentation of hard particles in bottom allows decreasing liquid losses in outlet of pulp. Rest of liquid and condensate from collector are reused in sprayed system of gas condensing system. Gas condensing unit allows reaching higher level of gas flow from hard particles because of contact of liquid drops and film which allows more effective catching of small and micro particles including particles PM2,5.
Patent LV-14637-B (LV)
Title: Method and device for transfering a tensile load to an elastic strip of composite material
Inventor: PORTNOVS GEORGIJS
IPC: E04C5/12
Filed: 2012-12-03
Abstract: The invention refers to method for transferring a tensile load to an elastic strip (22) by means of gripping device (10) having a through slit (20) adapted to accommodate the elastic strip (22), wherein the slit (20) constitutes, in its longitudinal section, a wavy curve such that the curvature of the wavy curve has a zero value at the entry point (24) into the through slit (20), and the maximum value of the curvature in each subsequent wave is greater than in the previous one; wherein the load is transmitted to the elastic strip (22) due to friction forces arising from the elastic strip (22) tensioning into the through slit (20) and microslipping over curved surfaces (16, 18) of the through slit (20).
Patent LV-11767-B (LV)
Title: Phase shift transformer for three-phase current
Inventor: ANSIS GRUNDULIS
IPC: H01F27/29
Filed: 1997-01-02
Abstract: This invention refers to the electro-technical industry and can be used for a three-phase consumer, three-phase electrical engine, loading voltage strength and phase offset angle control at symmetric, non-symmetric, non-full phase and fuse modes. It can be used as a changer for loading voltage strength and phases offset angle metric changer in phase-sensitive three-phase electrical device protection facilities. It gives the chance to indicate three-phase consumers symmetric overload, great asymmetry of voltage, lines cable breaking, one-phase fuse, identify phase, in which the gap or fuse appeared.The invention's objective is to endow a three-phase electrical device loading power multifunctional control, which gives a chance to implement its loading's automatic regulation and high-speed effective protection to electric overload in symmetric and non-symmetric modes. The invention's essence is, in difference from known three-section and two-section transformers, this transformer is made from two magnetically isolated square cores with common bars shift connection, which, in comparison to a butt-joint, substantially decreases magnetic transition flow from one core to another, limiting outgoing signal mutilations, increasing the transformer's mechanical strength, decreasing its size and simplifying the manufacturing technology, because core clamps can be used for ribbons bandage.<IMAGE>
Patent MX-168459-B (MX)
Title: Columna de reaccion
Inventor: MICHEL FLORK
IPC: B01J47/02
Filed: 1986-11-26
Abstract: La presente invención se refiere a columna de reacción, del tipo destinado a hacer pasar un componente líquido, denominado solución, que debe ser tratado en contacto con un componente estático sólido y dividido en granos, tal como un catalizador, una resina intercambiadora de iones, un tamiz molecular u otro, estando dicha columna esencialmente constituida por un recipiente vertical que comprende por lo menos dos orificios de paso de dicha solución, uno en su parte superior y otro en su parte inferior, caracterizada porque la presión que reina en la parte inferior de la columna es sensiblemente igual a la altura de carga de la solución en esta última, de tal forma que el flujo de la solución a través del componente estático resulta principalmente de su gravedad; porque la parte inferior (2) de dicho recipiente es de una forma general sensiblemente cónica; y porque el volumen interno de dicha parte cónica está parcialmente provisto de una masa de materiales divididos, inertes con respecto a dicha solución (4), estando dispuestos dichos materiales en capas horizontales (6, 7, 8) constituidas por partículas de tamaño creciente de forma por lo menos discontinua desde su capa superior (6) hasta su capa inferior (8) en tanto que las densidades de las partículas son por lo menos iguales a las del componente estático (5) o de la solución, siendo la densidad de las partículas de las capas inferiores por lo menos igual a la de las capas superiores.
Patent MX-167560-B (MX)
Title: Composicion de carbamato, procedimiento para su obtencion y aplicacion en fluidos funcionales
Inventor: WARD WILLIAM C JR
IPC: C10L1/24
Filed: 1987-02-19
Abstract: La presente invención se refiere a una composicón que contiene: (I) donde R1 y R2 son independientemente iguales o diferentes y están seleccionados entre hidrógeno e hidrocarbilo, con la condición de que por lo menos uno de los radicales R1 o R2 es hidrógeno para por lo menos uno de los grupos tiocarbamato y por lo menos uno de los radicales R1 o R2 es hidrocarbilo para cada uno de los grupos tiocarbamato; M es Mo o W; X es O o S; b es como mínimo 1; a es como mínimo 1 dependiendo del estado de oxidación de M; c es como mínimo 1 dependiendo del estado de oxidación de M y d es 0 o como mínimo 1 dependiendo del estado de oxidación de M.
Patent NO-140470-B (NO)
Title: Vandig dispersjon av en terpolymer av etylen, vinylklorid og en akrylamidforbindelse for anvendelse som bindemiddel
Inventor: FALLWELL WILLIAM FRANKLIN JR
IPC: C08J3/05
Filed: 1971-07-15
Abstract: Vandig dispersjon av en terpolymer av etylen,. vinylklorid og en akrylamidforbindelse for anvendelse som.bindemiddel.
Patent NO-158566-B (NO)
Inventor: OUDEJANS JOHANNES CORNELIS
IPC: B01J37/03
Filed: 1985-06-20
Abstract: The invention provides a nickel/alumina/silicate catalyst, with an atomic ratio of nickel/aluminium between 20 and 2, a nickel/silicate ratio between 20 and 1, an active nickel surface area between 70 and 150 m<sup>2</sup>/g nickel and an average pore size, depending on the above atomic ratio, between 4 and 20 nanometers. Preferably the nickel/aluminium atomic ratio is between 10 and 4 and the nickel/silicate ratio between 12 and 3. Preferably the catalyst has a specific porous structure.The invention also provides a method for preparing the catalyst by a two step process involving precipitating nickel ions and adding during a second, so-called ageing step a soluble aluminium compound and optionally the silicate. The silicate is preferably added during a second ageing step.The catalyst is useful for hydrogenating unsaturated organic compounds in particular oils.
Patent NO-167151-B (NO)
Inventor: GAROFF THOMAS
IPC: C08F10/00
Filed: 1987-03-27
Abstract: Catalyst components for alpha-olefin polymerization catalysts (which comprise an organoaluminium compound, an external electron donor and a solid magnesium-containing catalyst component obtained by the reaction of a solid magnesium-containing carrier component with a titanium halogen compound) are prepared by the steps of:   (a) bringing magnesium sulphate, in the form of an aqueous solution or an alcoholic suspension, into contact with an aqueous or alcoholic solution of barium or calcium chloride and separating the undissolved part from the solution or suspension; (b) selectively evaporating the solution until dry and heating the obtained residue at 130-150 DEG C, and dissolving this residue in alcohol if water has been used as solvent in step (a); (c) drying the alcoholic solution of the magnesium component by periodic azeotropic distillation; (d) precipitating the solid carrier component from the alcohol solution; and (e) reacting the solid carrier component with a titanium halogen compound in the presence of an internal electron donor or without an electron donor. c
Patent NO-169700-B (NO)
Inventor: KRISHNAMURTHY SOWMITHRI
IPC: B01J29/06
Filed: 1988-02-04
Abstract: NOx content of industrial exhaust gas is reduced with ammonia in the presence of a catalyst comprising a porous crystalline siliceous solid such as ZSM-5 zeolite. Fast responses to changes of NOx load is achieved with a zeolite of low acid activity.