baber/WOPTO huggingface dataset:
Patent ES-2034347-T3 (ES)
IPC: A01D34/66
Filed: 1988-12-16
Granted: 1993-04-01
Abstract: A cutting bar 2 is connected to the frame 13 by at least one additional connecting element 16. On each side of the additional connecting element 16 is provided a transport element 101, 100, 29 rotating around an axis pointed upwardly. The direction of rotation of the transport elements 101, 100, 29 is such that their movements of rotation diverge toward the front. The front edge 46 of the additional connecting element 16 extends toward the rear and downwardly to the vicinity of the cutting plane 31 of the cutting elements 10 and in the operational zone of the transport elements 101, 100, 29 located on both sides of the additional connecting element 16.
Patent ES-2043882-T3 (ES)
Inventor: NICKISCH KLAUS DR
IPC: C07J71/00
Filed: 1988-07-01
Granted: 1994-01-01
Abstract: An epoxidation reagent comprising hydrogen peroxide and at least one aryl methyl ketone of the formula I <IMAGE>  in which  X represents a fluorine or chlorine atom, R<1>, R<2> and R<3>, which may be identical or different, each represent a C1-C6-alkyl, C6-C10-aryl, C6-C10-Ar-C1-C6-alkyl, O-C1-C6-alkyl, O-C6-C10-aryl radical, a fluorine, chlorine, bromine or hydrogen atom, a cyano, nitro or trifluoromethyl group, an amido radical -CO-NR<4>R<5> or a sulphonyl radical -SO2R<4>, in which R<4> and R<5> are identical or different and each denote a C1-C6-alkyl, C1-C10-aryl or a C6-C10-aryl-C1-C6-alkyl group, in which in the case of -CO-NR<4>R<5> R<4> and R<5> together can form an aliphatic or aromatic 5- or 6-membered heterocycle, or R<1> and R<2> together represent a fused aliphatic or aromatic ring and its use for the epoxidation of organic compounds are described.
Patent ES-2034393-T3 (ES)
Title: Aparato para la manipulacion de piezas.
IPC: B21D43/10
Filed: 1988-09-16
Granted: 1993-04-01
Abstract: EL INVENTO SE REFIERE A UN APARATO MANIPULADOR PARA TRANSPORTAR Y MANIPULAR MERCANCIAS (4). EL APARATO INCLUYE UN EXPOSITOR O ESTRUCTURA SIMILAR; UN RAIL DE TRANSPORTE (10) O TRAYECTO QUE LLEVA EL EXHIBIDOR; UN CARRITO (17) QUE PUEDE DESPLAZARSE A LO LARGO DEL RAIL (10 MEDIANTE UN ELEMENTO MOTOR SEPARADO (19); Y UN DISPOSITIVO DE SUJECION (22) QUE ESTA MONTADO PIVOTANTEMENTE SOBRE EL CARRITO Y DESTINADO A MANIPULAR LA MERCANCIA (4). EL INVENTO SE CARACTERIZA PORQUE EL APARATO CONSTA ADEMAS DE UN EJE GUIA PIVOTANTE (28) DE SECCION TRANSVERSAL NO REDONDEADA Y QUE SE EXTIENDE EN PARALELO AL RAIL DE TRANSPORTE (10). UN SEGUIDOR (30,31) ESTA DISPUESTO GIRATORIAMENTE SOBRE EL CARRITO (17) Y CONECTADO AL EJE GUIA (28) PARA MOVERSE DESLIZANTEMENTE A LO LARGO DEL MISMO PERO CON TORSION RIGIDA EN UNA DIRECCION RADIAL. UNA TRANSMISION DE ROTACION ANGULAR (23-27) ESTA DISPUESTA ENTRE EL SEGUIR (30,31) Y EL DISPOSITIVO DE SUJECION (22)
Patent ES-2036308-T3 (ES)
IPC: B63H21/21
Filed: 1989-08-01
Granted: 1993-05-16
Abstract: A control apparatus is provided which controls a motor, clutch and drive gear arrangement. The device consists of a movable control lever assembly which moves from a neutral position into at least one other operating position. The control apparatus includes a switching device that is operated as a two-part activating member. The activating member is mounted in a guide arrangement which remains in a fixed position in relationship to such control lever assembly. The activating member can be moved from a neutral position of such control lever assembly into a second position in which the activating member will act upon the switching assembly.
Patent ES-2035491-T3 (ES)
IPC: B29C45/64
Filed: 1987-04-10
Granted: 1993-04-16
Abstract: A mould closing assembly (10;110) having two platen supporting bodies or turrets (12,14;112,114) mounted on a base (12;112) to pivot in a generally horizontal plane about two vertical pivot axes (40;140). At least one platen (20;120) reciprocats linearly to clamp the mould sections together, and a tie bar (24;124) extends above the two turrets between the pivot points. Preferably the mould closing assembly has a modular construction.
Patent ES-2047090-T3 (ES)
Inventor: THURIES EDMOND
IPC: H01H33/95
Filed: 1989-10-24
Granted: 1994-02-16
Abstract: The invention concerns a gas-blast circuit interrupter for high potential. The subject of the invention is a gas-blast circuit interrupter for high potential, of the type comprising at least one disconnection chamber comprising an insulating envelope filled with the said gas and inside which are placed a stationary assembly comprising a main stationary contact and a stationary arcing contact, a mobile assembly comprising in particular a main mobile contact and a mobile arcing contact, the disconnection chamber comprising moreover an expelling cylinder opening into an expelling nozzle and a pair of secondary contacts, characterised in that the said expelling cylinder is delimited by a first cylinder (5) constituting the mobile arcing contact, a second cylinder (7) constituting the main mobile contact and a first semi-mobile piston (14) bearing one (30) of the secondary contacts, the other contact (31) being borne by a stationary tube (15) delimiting with the first piston, an insulating tubular extension (5B) of the said first cylinder (5) and a second piston integral with the said cylinder (5) and sliding along the said stationary tube, and a second closed volume (35). 
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Patent ES-2025840-T3 (ES)
IPC: F16B19/06
Filed: 1989-07-14
Granted: 1992-04-01
Abstract: PCT No. PCT/FR89/00373 Sec. 371 Date Jan. 22, 1991 Sec. 102(e) Date Jan. 22, 1991 PCT Filed Jul. 12, 1989 PCT Pub. No. WO90/01121 PCT Pub. Date Feb. 8, 1990.The invention relates to a fastener member for the production of assemblies, in particular a rivet. This fastener means includes a shank (1) and a head (2) intended to be deformed by flattening during installation. On its front face, this head has an annular groove (5) extending around the axis and positioned in proximity to the alignment of the exterior surface of the shank. This groove defines on the head two portions, one central (2C), the other peripheral (2P), able to be deformed independently under the effect of flattening. The invention enables a considerable improvement of the distribution of compressive forces between the fastener means and the materials to be assembled. It assures a satisfactory radial expansion of the head, as well as a sufficient flow of material toward the shank and the junction zone between shank and head.
Patent ES-2039841-T3 (ES)
IPC: A01D90/10
Filed: 1989-11-08
Granted: 1993-10-01
Abstract: The invention relates to an unloader for containers (3), in particular for garbage containers, in which a side wall is designed as an unlockable unloading hatch (4), in particular as an unloading hatch (4) which can be swivelled outwards by inclining the container (3), a mounting (1) on which a device (2) for emptying the loose material in the container (3) is secured in such a way that the emptying device (2) can be connected directly to the opening, closable by the unloading hatch (4), of the container (3), being arranged on an inclined or tiltable receiving frame (12, 18) for the container (3). In order to provide a solution to the hitherto existing problem in the emptying of a loose material and its piling up into a loose pile, where the solution should require as little expenditure on plant as possible and guarantee reliable breaking up of lumps formed, it is proposed that, in order to achieve a substantially lump-free pile of the loose material upon emptying, the emptying device (2) be designed as a control device. <IMAGE>
Patent ES-2067531-T3 (ES)
Inventor: KHUDDUS MOHAMMED A
IPC: C07D209/48
Filed: 1989-02-01
Granted: 1995-04-01
Abstract: This invention relates to a process for enhancing the properties of alkylene(C1-C6)-bis-(tetrabromophthalimide) or bis-(tetrabromophthalimide) products produced by the bromination, respectively, of alkylene(C1-C6)-bis (phthalimide) or bis-(phthalimide) with a brominating agent in the presence of oleum, the process comprising curing the alkylene(C1-C6)bis-(tetrabromophthalimide) or bis-(tetrabromophthalimide) product at a temperature above about 150 DEG C and below the melting point of the tetrabromophthalimide being cured for a period of from 36 hours to 5 hours. This enhanced product and its use in molding and extrusion compositions and in molded and extruded articles is also disclosed.
Patent ES-2038408-T3 (ES)
Title: Metodo para dar forma a embriones de material termoformable.
IPC: B29C70/54
Filed: 1989-04-27
Granted: 1993-07-16
Abstract: UN METODO PAR HACER UN MATERIAL COMPUESTO POR CONFORMADO TERMICO QUE COMPRENDE UNA MATRIZ POLIMERICA REFORZADA CON FILAMENTOS CONTINUOS, COMPRENDE LA LOCALIZACION DEL MATERIAL SUPERPUESTO CON AL MENOS UN DIAFRAGMA DE UN POLIMERO DE MATERIAL CONFORMADO TERMICAMENTE, CALENTANDO EL MONTAJE A UNA TEMPERATURA DE TERMO-CONFORMADO ADECUADA Y FORMANDO EL MONTAJE CONTRA UN SUPERFICIE HERRAMIENTA DE CONFORMADO (16) EN UN TIEMPO MENOR DE DOS MINUTOS.
Patent ES-2055066-T3 (ES)
Inventor: IMURA HIROO
IPC: C12P21/00
Filed: 1989-06-30
Granted: 1994-08-16
Abstract: Monoclonal antibodies which recognize the N-terminal of gamma-atrial natriuretic polypeptide ( gamma -ANP). Hybridomas capable of producing said monoclonal antibodies, including methods for their production, and the use of such antibodies in an immunoasssay for gamma -ANP.
Patent ES-2088905-T3 (ES)
Inventor: SCHREIBER HERBERT
IPC: C08K3/00
Filed: 1989-07-06
Granted: 1996-10-01
Abstract: Flame-retardant and heat-resistant plastics are obtained by curing a curable resin which, at least partially, comprises a mixture of
 (a) a resin component which contains or comprises at least one thermocurable compound containing 1-oxa-3-azatetraline groups; and
 (b) a second component which contains or comprises at least one flameproofing agent which is immiscible with the resin component, in particular one or more of the following substance groups or substances:
 aluminium hydroxide;
 hydrated calcium/magnesium carbonate;
 magnesium hydroxide;
 elemental red phosphorus;
 oxo-acids of phosphorus;
 inorganic salts of oxo-acids of phosphorus;
 organic salts of oxo-acids of phosphorus;
 polyphosphates;
 boric acid;
 salts of boric acid, preferably zinc borate; and expediently contains, in addition, at least one curable epoxide compound.
Patent ES-2045576-T3 (ES)
Inventor: ZWEIFEL MARTIN RUDOLF
IPC: B01D53/70
Filed: 1990-01-14
Granted: 1994-01-16
Abstract: The waste incineration plant is composed of a waste incineration furnace (1) and an afterburning chamber (2). The waste incineration furnace (1) is provided with a grate (3), above the fire chamber (4) of which a tubular passage (11) is provided on the roof (10), which opens coaxially into the bottom (13) of the afterburning chamber (2). In the afterburning chamber (2), a vortex flow is maintained by injection of oxygen (19), e.g. in the form of air, and is intensified by providing a conical constriction (23) at the upper end of the shaft (21) of the afterburning chamber (2). Complete combustion considerably decreases the fractions of the flue gases responsible for the formation of dioxins and furans, so that recombination of dioxins and furans during cooling of the flue gases is correspondingly decreased. <IMAGE>
Patent ES-2056262-T3 (ES)
Inventor: DELLEY MICHEEL
IPC: C12Q1/68
Filed: 1990-02-10
Granted: 1994-10-01
Abstract: The DNA probe comprises a DNA fragment capable of hybridisation to chromosomal DNA of strains of the L.delbrueckii species. This DNA fragment comprises an EcoRI fragment of chromosomal DNA from a strain of the L.delbrueckii species.
Patent ES-2057248-T3 (ES)
Inventor: ROTA ALBERTO
IPC: A01J25/02
Filed: 1990-04-24
Granted: 1994-10-16
Abstract: In a method for the production of coagulated products, in particular food products obtained by the coagulation of dairy and similar products, the starting material coagulation step involves the heating of the material itself at least in part by indirect means. Preferably, such indirect heating is obtained by passing steam through a jacket or similar hollow space shrouding the coagulation container. The degree of coagulation of the finished product may be controlled by the regulation of the quantity of heat transmitted directly or indirectly to the starting material.
Patent ES-2081932-T3 (ES)
Title: Hidrolizados de silano metaestables y proceso para su preparacion.
Inventor: WEISS KEITH DAREN
IPC: C08G77/04
Filed: 1990-06-06
Granted: 1996-03-16
Abstract: EL PRESENTE INVENTO SUMINISTRA UN PROCEDIMIENTO DE SINTESIS RELATIVAMENTE SIMPLE PARA LA FORMACION DE HIDROLIZATO DE SILANO DE LA FORMULA (I), EN DONDE R ES HIDROGENO O UN GRUPO METIL, N ES UN ENTERO MAYOR QUE 8 Y X ES UN NUMERO ENTRE 0 Y 2. LOS COMPUESTOS DE HIDROLIZATO SON METAESTABLES EN UNA SOLUCION DE SOLVENTE, PERO SE VUELVEN INSOLUBLES DESPUES DE SER DEPOSITADOS SOBRE UN SUBSTRATO. LAS RESINAS SON UTILES COMO RECUBRIDORAS PLANIFICANTES PARA SUBSTRATOS TALES COMO DISPOSITIVOS ELECTRONICOS Y PUEDEN SER CERAMIFICADOS MEDIANTE SU EXPOSICION A UNA ATMOSFERA OXIDIZANTE A UNA TEMPERATURA ENTRE 100 Y 1000 (GRADOS) C PARA FORMAR REVESTIMIENTOS CERAMICOS SOBRE DICHOS SUBSTRATOS.
Patent ES-2057446-T3 (ES)
Inventor: MERRITT DAN
IPC: F02B1/04
Filed: 1990-12-05
Granted: 1994-10-16
Abstract: An internal combustion engine has first and second cylinders (12, 14), the first cylinder (12) having a larger swept volume than the second cylinder (14) and the second cylinder being formed in the crown of the first cylinder. First and second pistons (16, 18) are reciprocable respectively in the first and second cylinders (12, 14), the second piston (18) being formed as a protrusion on the crown of the first piston (16). A combustion chamber (20) is formed in the second piston (18) with an air port (44) opening into the first cylinder (12) and a second port (40) opening into the second cylinder (14). A first inlet is provided (25) for supplying air or the like into the first cylinder (12) during an induction stroke of the first piston (16) together with a fuel inlet (36) for supplying fuel to said second cylinder (14). A passage extends between the first and second cylinder to enable transfer of air from said first cylinder (12) to said second cylinder (14) other than through said combustion chamber (20) over a preselected angle of movement of the pistons relative to the cylinders for assisting movement of gases from said second cylinder (14) into said combustion chamber (20). Additional control means for controlling the movement of air is also provided. <IMAGE>
Patent ES-2048982-T3 (ES)
Title: Organo de contacto electrico macho.
Inventor: NADIN LEONARD
IPC: H01R13/04
Filed: 1990-01-08
Granted: 1994-04-01
Abstract: ORGANO DE CONTACTO ELECTRICO MACHO QUE CONSTA DE UN CUERPO DE SECCION EN U CON DOS ALAS (10,11) Y UN ALMA (9) Y CUYO EXTREMO ESTA PROLONGADO POR UNA BARRA (5), MIENTRAS QUE EL OTRO EXTREMO CONSTA DE UNOS ELEMENTOS (7) PARA SU EMPALME CON UN CONDUCTOR ELECTRICO, REALIZANDOSE DICHO ORGANO POR CORTE Y PLEGADO A PARTIR DE UNA PIEZA BRUTA METALICA BUENA CONDUCTORA DE ELECTRICIDAD QUE PRESENTA DOS BANDAS (2,3) CON ESPESORES DIFERENTES. SE CARACTERIZA PORQUE LA BARRA (5) Y LA PARTE DEL CUERPO EN U, ADYACENTE A LA BARRA (5), SE CORTAN EN LA BANDA (2) QUE TIENE MAYOR ESPESOR.
Patent ES-2071063-T3 (ES)
Inventor: DAMBRINE FRANCIS
IPC: C13B10/08
Filed: 1990-12-19
Granted: 1995-06-16
Abstract: Process and apparatus for preliminary treatment of beet slices, before diffusion, by means of a solution of calcium monosaccharate. To lower the monosaccharate content of the retained juice carried by the slices into the diffusion apparatus, while maintaining optimum conditions for the reaction between solution and slices, the treatment comprises a first stage during which the slices are placed in contact with a first solution of calcium monosaccharate, while creating a countercurrent wise movement of the solution and of the slices, and a second stage during which the slices are placed in contact with a second solution of calcium monosaccharate while creating a concurrent movement of the solution and of the slices.
Patent ES-2065549-T3 (ES)
Inventor: BOYER SERGE
IPC: G05D23/19
Filed: 1990-09-14
Granted: 1995-02-16
Abstract: PCT No. PCT/FR90/00660 Sec. 371 Date Feb. 28, 1992 Sec. 102(e) Date Feb. 28, 1992 PCT Filed Sep. 14, 1990 PCT Pub. No. WO91/04524 PCT Pub. Date Apr. 4, 1991.A device and method for regulating a cooking apparatus. In order to obtain an effective servocontrol of the desired temperature with a cooking surface, when cooking for example by induction, a servocontrol curve is used in the plane (i.e., temperature, variation of the temperature as a function of time). Each time the curve is crossed the heating power is cut off or reduced. The device and method applies principally to monitoring of the heating device. The device according to the present invention is particularly well adapted to cooking surfaces and especially to cooking surfaces wherein cooking is done by induction.
Patent ES-2053222-T3 (ES)
Inventor: BECKER JOHANNES DIPL-ING
IPC: H01H5/04
Filed: 1991-02-28
Granted: 1994-07-16
Abstract: The aim exists to reduce the size of low-tension switchgears, but on the other hand it is intended to improve the switching power. New requirements now demand that the contacts of the low-tension switchgears close more quickly in order to achieve a small amount of contact erosion and hence a longer life of the low-tension switchgears. The invention indicates a means by which a switching mechanism is produced with only a few individual parts, a bell crank system 2, 3, 4 drives a contact shaft 6 via a switching lever 1, a locking device 9, 10, 11 initially locks the contacts 7, 8 shortly before touching, and, in the case of further operation of the switching lever 1, switches on suddenly, and a trip device 14, 16, 18 opens the contacts 7, 8 in the case of a fault current. Such a switching mechanism can be used in low-tension switchgears, preferably in fault-current protection switches. <IMAGE>
Patent ES-2080861-T3 (ES)
Title: Dispersiones polimeras acuosas.
Inventor: GRUBERT HEINRICH DR
IPC: C08F8/30
Filed: 1991-07-18
Granted: 1996-02-16
Abstract: LAS DISPERSIONES DE POLIMERIZADOS ACUOSOS, SE OBTIENEN POR UNA MEZCLA DE MONOMEROS, QUE CONTIENEN UN PESO DEL 10 AL 100% DE MONOMEROS QUE CONTIENEN HALOGENOS, SE POLIMERIZA SEGUN EL METODO DE POLIMERIZACION DE EMULSION RADICAL EN UN MEDIO ACUOSO, EL VALOR DEL PH DE LA FASE ACUOSA DE LA DISPERSION DE POLIMERIZADOS ACUOSOS GRACIAS A LA ADICCION DE AMONIACO ASI COMO DE AMINAS PRIMARIAS Y SECUNDARIAS SE APLICA EN DIFERENTES MEDIOS DE BASE SOBRE UN VALOR DE 5 A 10, SE APLICA SOBRE UNA MEZCLA DE MONOMEROS, Y SE ADICIONA UN ACTIVADOR DE AL MENOS 0,005 A 1% DE PESO DEL GRUPO DE GLICERINA, ACIDOS PIVALINOS, PARALDEHIDO, 2,6 -DI -TERT -BUTIL -P -KRERSOL , BENZOFENO, BENZOFENO DE ALQUIL SUSTITUIDO, ACIDO TIOSULFURICO, Y SUS SALES ASI COMO ACIDOS OXALES Y SUS SALES, EN EL QUE EL ADITAMIENTO DEL MEDIO BASE ASI COMO DE AL MENOS UN ACTIVADOR SE PUEDE CONSEGUIR MIENTRAS Y/O DESPUES DE LA POLIMERIZACION DE EMULSION.
Patent ES-2067826-T3 (ES)
Inventor: GALEAZZI GIANCARLO
IPC: B09B1/00
Filed: 1991-10-04
Granted: 1995-04-01
Abstract: The waste collection device comprises a structure (1) having a base (2) and a cover (3) which are suitable for delimiting a portion of space for the accommodation of a container (4). The structure (1) is connected to lifting means (9,10) suitable for providing movement between a position in which the structure (1) is concealed within a pit (11) and a position in which it protrudes completely from the pit (11). A hollow column (15) is rigidly associated with the cover (3) and is connected to the container (4) for the insertion of waste. <IMAGE>
Patent ES-2110974-T3 (ES)
Inventor: EVANS JONATHAN C
IPC: C07C59/66
Filed: 1991-12-16
Granted: 1998-03-01
Abstract: The present invention is directed to a stereospecific synthesis of (S)-vinyl-GABA, (S)-allenyl-GABA, (S)-5-allenylpyrrolidinone, and (S)-5-vinyl-pyrrolidinone. Another aspect is directed to a class of 1,5-disubstituted-pyrrolidinone intermediates as well as a new class of chiral lactic acid derivatives. <CHEM> t
Patent ES-2041544-T3 (ES)
IPC: A61F2/46
Filed: 1992-01-01
Granted: 1993-11-16
Abstract: The invention relates to a stem for a hip joint prosthesis having an elongate stem part (2, 3) implantable in the medullary space of a femoral bone and fixable there by a cement layer. According to the invention, protuberances (17, 18, 19, 21) which have a small area in comparison with the size of the circumferential area are distributed over a few suitable sites on the circumferential area of the stem part (2, 3) as spacers relative to the inner wall of the medullary space. The lower stem part (2) is cylindrical and intended for insertion in a cylindrically drilled medullary space in the socket of the femoral neck. This achieves uniform thickness of the cement layer with only few interruptions for high primary and long-term stability.   <IMAGE>
Patent ES-2056560-T3 (ES)
Inventor: DIEMER MARTINUS BERNARDUS JOHA
IPC: G02B6/12
Filed: 1991-01-23
Granted: 1994-10-01
Abstract: The invention relates to an integrated optical polarisation splitter based on the mode filter principle, in which the asymmetry, necessary therefor, of the waveguides is obtained by using a polable glassy polymer as optical waveguide material, which material is polarisation-sensitive in the poled state and is not, or virtually not polarisation-sensitive in the unpoled state. A Y-shaped optical waveguide pattern 8 of polable glassy polymer comprises a continuous optical waveguide formed by the optical waveguide sections 8.1 (incoming) and 8.2 (outgoing) in which the polymer is in the unpoled state and an outgoing optical waveguide section 8.3 which connects to said optical waveguide at an acute angle and in a tapered fashion and in which the polymer is in the poled state. Since the poled material is also electro-optical, an electric field, for example generated between electrodes 2 and 10, can still correct any small deviations in the asymmetry. Advantages are simple production, with relatively high tolerances, and a short integration length of the component. <IMAGE>
Patent ES-2075953-T3 (ES)
Title: Procedimiento para fabricar laminas de vidrio cilindrado con dibujos.
Inventor: MARTELLI GIULIANO
IPC: B44F1/06
Filed: 1991-10-09
Granted: 1995-10-16
Abstract: UN METODO PARA FABRICAR CRISTAL EN LAMINAS DECORADO INCLUYE LOS PASOS DE SURTIR DE UN CRISTAL LAMINADO, BIEN DE TIPO TRANSPARENTE O COLOREADO, APLICAR A ESE CRISTAL LAMINADO UNA CAPA FINA DE UNA RESINA EPOXI TRANSPARENTE, APLICAR, POR UN PROCESO DE TRANSFERENCIA, UN DIBUJO SOBRE ESTA CAPA DELGADA DE RESINA EPOXI Y, FINALMENTE, APLICAR EN EL DIBUJO UNA PELICULA DE REVESTIMIENTO COLOREADA.
Patent ES-2048007-T3 (ES)
Inventor: SMITH JAMES W
IPC: B01D53/18
Filed: 1990-12-04
Granted: 1994-03-01
Abstract: Components, usually but not exclusively gaseous components, are removed in a liquid medium from gas streams and chemically converted into an insoluble phase or physically removed. Specifically, hydrogen sulfide may be removed from gas streams by oxidation in aqueous chelated transition metal solution in a modified agitated flotation cell. A gas-liquid contact apparatus, generally a combined chemical reactor and solid product separation device, comprising such modified agitated flotation cell also is described. In order to effect efficient mass transfer and rapid reaction, gas bubbles containing hydrogen sulfide and oxygen are formed by rotating an impeller at a blade tip velocity of at least about 350 in/sec. to achieve the required shear. To assist in the reaction, a surrounding shroud has a plurality of openings, generally of aspect ratio of approximately 1, of equal diameter and arranged in uniform pattern, such as to provide a gas flow therethrough less than about 0.02 lb/min/opening in the shroud. In general, the gas velocity index is at least about 18 per second per opening, preferably at least about 24 per second per opening. Each of the openings has an area corresponding to an equivalent diameter less than about one inch.