| Patent Number |
Title Of Patent |
Date Issued |
| 7261284 |
Process for effecting mass transfer between a liquid phase and a gaseous phase |
August 28, 2007 |
| A process for effecting mass transfer between a liquid phase and a gaseous phase in a filled-type column comprising an external shell which accommodates at least one filler-containing basket wherethrough the phases are caused to flow in countercurrent relationship, advantageously com |
| 7115239 |
Catalysts for ammonia synthesis |
October 3, 2006 |
| Catalysts for ammonia synthesis based on ruthenium, directly supported over graphite having BET specific surface area in excess of 10 m.sup.2/g, preferably in excess of 100 m.sup.2/g and more preferably in excess of 280 m.sup.2/g, the graphite being characterised by X-ray diffraction |
| 7014177 |
Process for effecting mass transfer between a liquid phase and a gaseous phase |
March 21, 2006 |
| A process for effecting mass transfer between a liquid phase and a gaseous phase in a filled-type column having an external shell which accommodates at least one filler-containing basket wherethrough the phases are caused to flow in countercurrent relationship. The process includes the s |
| 6610259 |
High efficiency catalytic carbon monoxide conversion process |
August 26, 2003 |
| A process for high-efficiency catalytic conversion of carbon monoxide (CO) to carbon dioxide (CO.sub.2) of the type comprising the steps of feeding at predetermined speed a gaseous flow comprising carbon monoxide to a reaction space (3) and reacting in the reaction space (3) said carbon |
| 6467758 |
Process for effecting mass transfer between a liquid phase and a gaseous phase |
October 22, 2002 |
| A process for effecting mass transfer between liquid phase and a gaseous phase in a filled-type column having an external shell which accommodates at least one filler-containing basket wherethrough the phases are caused to flow in countercurrent relationship. The process advantageously |
| 6299849 |
Method for in-situ modernization of a heterogeneous exothermic synthesis reactor |
October 9, 2001 |
| A Method for in-situ modernization of a heterogeneous exothermic synthesis reactor, comprising the steps of providing at least a first and at least a second catalytic bed (12, 13) in an upper (2a) respectively lower (2b) portion of the reactor, providing additionally a lowermost catalyti |
| 6207078 |
Process for the production of synthesis gas |
March 27, 2001 |
| A process for the production of synthesis gas for obtaining compounds such as ammonia or methanol, in which hydrocarbons and steam are reacted first in a primary reforming section (11) and then--together with oxygen--in a secondary reforming section (12), thus obtaining CO, CO.sub.2, H.s |
| 5985231 |
Catalytic carbon monoxide conversion with acceleration or gaseous feed |
November 16, 1999 |
| A process is provided for the catalytic conversion of carbon monoxide to carbon dioxide by feeding a gaseous flow containing carbon monoxide and water droplets into a reactor containing a catalyst and reacting the carbon monoxide with steam in the reactor to obtain carbon dioxide. The |
| 5882606 |
Method of retrofitting a heterogeneous exothermic synthesis reactor |
March 16, 1999 |
| In a method of modernizing a heterogeneous exothermic synthesis reactor (1) of the type comprising an external shell (2), in which at least one catalytic bed (15, 16, 17) is supported, the catalytic bed (15, 16, 17) is connected to an external boiler (21), for generating high pressure st |
| 5585074 |
Method and apparatus for in-situ modernization of a heterogeneous exothermic synthesis reactor, |
December 17, 1996 |
| A method for "in-situ" modernization of a reactor for effecting heterogeneous exothermic synthesis reactions, especially of the so-called Kellogg type, including the preliminary step of providing at least three radial or axial-radial catalyst beds (11, 12, 13), includes the steps of |
| 5254316 |
Reactors for heterogeneous synthesis |
October 19, 1993 |
| Improved process to convert in situ conventional reactors with four catalytic beds with axial flow and with intermediate quenching (Kellogg reactor), Third and fourth original beds are combined thus obtaining a reactor with three beds through which the synthesis gas now flows with a |
| 5176800 |
Process for the modernization of existing urea plants and a modernized urea plant |
January 5, 1993 |
| A process to modernize existing urea plants which use a stripping with carbon dioxide, and to increase urea yields and flexibility under overload conditions while at the same time reducing energy consumption, corrosion phenomena and possible risks of explosive mixtures. The plant include |
| 5171543 |
Reactor for exothermic heterogeneous synthesis reactions |
December 15, 1992 |
| Synthesis gas is reacted in several catalytic beds having axial-radial or radial flow. Reacted gas is collected at an outlet of a final catalytic bed and is transferred to a reaction heat recovery system situated at a top of a reactor. The reactor includes three catalytic beds, two or mo |
| 5152977 |
Process for exothermic heterogeneous synthesis with external recovery of heat |
October 6, 1992 |
| In a process for exothermic and heterogeneous synthesis, for example of ammonia, in which the synthesis gas is reacted in several catalytic beds with axial-radial or only radial flow, the reaction gas is collected at the outlet from the last catalytic bed but one and is transferred to a |
| 5130098 |
System to improve the efficiency of heterogeneous reactors for exothermic synthesis and more par |
July 14, 1992 |
| A system for modernizing exothermic heterogeneous reactors used in the synthesis of ammonia, methanol and the like, which include a pressure shell, a wall for forming an airspace, a wall or cartridge for containing a catalyst bed, and catalyst-containing basket. An airspace-forming wall |
| 4963338 |
Process for heterogeneous synthesis and related reactors |
October 16, 1990 |
| Improved process for heterogeneous synthesis and related reactors according to which the synthesis catalyst is distributed in three catalytic beds either axial-radial or radial, control of the temperature between beds being effected by means of fresh quench gas between the first and the |
| 4952375 |
System for reducing energy consumption improving reactors for heterogeneous catalytic synthesis |
August 28, 1990 |
| The energy consumption of conventional reactors for heterogeneous synthesis, e.g., ammonia synthesis and methanol synthesis, wherein the synthesis gas flows substantially axially through catalyst beds, is substantially reduced by inserting in at least one catalyst bed: two concentric |
| 4613696 |
Process for urea production |
September 23, 1986 |
| A process for the production of urea from ammonia and carbon dioxide via synthesis where the urea formation takes place in a synthesis zone (or zones) in which an excess of free ammonia is kept to favor high conversions, said synthesis zone (or zones) being followed by an ammonia sep |
| 4459369 |
Catalyst for the synthesis of oxygenated organic compounds and process for its manufacture |
July 10, 1984 |
| Catalyst for heterogeneous synthesis and more particularly for the preparation of oxygenated compounds from synthesis gas (substantially H.sub.2 and CO and CO.sub.2), based on the general formula:in which M is at least one metal selected from the group consisting of chrome, manganese, co |
| 4430254 |
Spherical cerium-activated catalyst for ammonia synthesis and process for its manufacture |
February 7, 1984 |
| A spherical cerium-activated catalyst for the NH.sub.3 synthesis is prepared by: mixing magnetite with (by weight): 2-3.5% of aluminium oxide, 0.8-2% potassium hydroxide, 2-3.5% calcium oxide, 0.1-0.4% magnesium oxide and 0.2-0.5% silica; melting this mixture in a furnace at a temperatur |
| 4407737 |
Catalysts for heterogeneous synthesis |
October 4, 1983 |
| In the process for the preparation of catalysts for heterogeneous synthesis, particularly for the ammonia synthesis, in which a mixture of magnetite and oxides of calcium, aluminium, potassium and silicon is molten, the molten mass is air cooled, freed from the slag, crushed and powd |
| 4405562 |
Axial-radial reactor for heterogeneous synthesis |
September 20, 1983 |
| In a reactor comprising an outer shell and an internal cartridge preferably obtained by assembling a number of stackable modular cartridges, each comprising from the outside to the inside at least one solid wall forming an air space with the shell inside wall, a continuous bottom to the |
| 4372920 |
Axial-radial reactor for heterogeneous synthesis |
February 8, 1983 |
| Disclosed is a reactor for heterogeneous catalytic reactions of gaseous reactants under pressure, comprising: a container having an inlet for introduction of gaseous reactants and an outlet for the efflux of products of the reactions; a cartridge having a cylindrically shaped wall placed |
| 4308174 |
Spherical cerium-activated catalyst for ammonia synthesis and process for its manufacture |
December 29, 1981 |
| A spherical cerium-activated catalyst for the NH.sub.3 synthesis is prepared by: mixing magnetite with (by weight): 2-3.5% of aluminum oxide, 0.8-2% potasium hydroxide, 2-3.5% calcium oxide, 0.1-0.4% magnesium oxide and 0.2-0.5% silica; melting this mixture in a furnace at a temperature |
