| Patent Number |
Title Of Patent |
Date Issued |
| RE30668 |
Process for preparing materials having improved mechanical and thermal properties and materials |
July 7, 1981 |
| The mechanical and thermal properties of aluminum oxide, such as .gamma. alumina, adapted for use as a catalyst or catalyst carrier are improved through a treatment thereof with a silicon compound such as an alkyl orthosilicate in which the aluminum oxide is impregnated with the silicon |
| RE30652 |
Method for constructing a thermoelectric module and the module so obtained |
June 16, 1981 |
| This invention relates to a method for constructing a thermoelectric module, as well as to the module so obtained. The method according to the invention comprises the steps of construction a reference shoulder on the semiconductor bar, assembling the semiconductor bars in series by using |
| RE29338 |
Process for the preparation of esters of carbonic acid |
August 2, 1977 |
| A process is described whereby carbonic acid esters, i.e., alkyl, aryl and cycloalkyl carbonates, are prepared by reacting an alcohol with oxygen and carbon monoxide in the presence of a catalyst selected from copper complexed with an organic molecule. |
| 7404942 |
Process for the production of hydrogen and the co-production of carbon dioxide |
July 29, 2008 |
| Process for the production of hydrogen and the co-production of carbon dioxide in separate streams comprising the following operations: feeding of a solid to a first reaction zone (R1) in which a liquid or gaseous hydrocarbon, preferably natural gas or methane, is also fed, which reacts |
| 7339086 |
Process for the hydrogenation of branched olefins deriving from the dimerization of isobutene |
March 4, 2008 |
| A process is described for the hydrogenation of olefinic streams containing sulfurated compounds, obtained starting from hydrocarbon cuts containing isobutene (by means of selective dimerization), characterized by fractionating said streams in one or more distillation columns and hyd |
| 7255795 |
Process for selectively removing molybdenum from liquid mixtures containing it together with van |
August 14, 2007 |
| Process for selectively removing molybdenum from liquid mixtures containing it, in a quantity greater than (200) mg/l, together with vanadium characterized in that it comprises the following steps: bringing the liquid mixture to a pH of less than (3); adding a solution of an alkaline |
| 7235706 |
Process for preparing light olefins by dehydrogenation of the corresponding paraffins |
June 26, 2007 |
| A process for preparing light olefins from corresponding paraffins consists of reacting said paraffins in a reactor, operating at a temperature of between 450 and 800.degree. C., a pressure of between 0.1 and 3 atm absolute and a GHSV of between 100 and 10000 h.sup.-1, with a catalyt |
| 7235113 |
Use of an oxygenated product as a substitute of gas oil in diesel engines |
June 26, 2007 |
| Use of a liquid oxygenated product with a cetane number higher than 50, consisting of one or more compounds selected from dialkyl-polyformals represented by the formula RO(CH.sub.2O).sub.mR wherein R is an alkyl chain C.sub.nH.sub.2n+1, m is an integer equal to or higher than 2, n |
| 7163647 |
Process for the production of synthesis gas from heavy charges such as heavy crude oils and dist |
January 16, 2007 |
| Process for the production of synthesis gas from heavy charges comprising a partial oxidation of heavy charges with oxygen or air enriched in oxygen in the presence of vapour, carried out at temperatures higher than 1000.degree. C. and pressures equal to or higher than 20 atm and the |
| 7094940 |
Integrated process for the preparation of alkyl and alkenyl substituted aromatic compounds |
August 22, 2006 |
| Integrated process for the production of alkyl and alkenyl substituted aromatic compounds which comprises simultaneously dehydrogentaing in a reactor-regenerator system a mixture containing an alkyl and an aromatic alkyl hydrocarbon coming from an alkylation unit and recycling the de |
| 6914165 |
Process for obtaining a "diesel cut" fuel by the oligomerization of olefins or their mixtures |
July 5, 2005 |
| Process for obtaining a "diesel cut" fuel having a CN cetane number equal to or greater than 48 and a content of aromatics lower than 0.4% by weight starting from olefins or their mixtures, characterized in that it comprises oligomerizing said olefins having from 2 to 10 carbon, dist |
| 6897345 |
Process for the production of hydrocarbons with a high octane number starting from mixtures of n |
May 24, 2005 |
| A process is described for the production of hydrocarbons with a high octane number starting from mixtures essentially consisting of n-butane and isobutane (such as for example field butanes) comprising a skeleton isomerization section, a dehydrogenation section of paraffins, a selective |
| 6875411 |
Process for the production of hydrogen |
April 5, 2005 |
| Process for the production of hydrogen consisting in subjecting a solid to oxidation and treating, in a different zone, the oxidized form thus produced with a reducing stream, preferably a hydrocarbon. |
| 6841712 |
Process for the dehydrogenation of ethylbenzene to styrene |
January 11, 2005 |
| A process is described for the dehydrogenation of ethylbenzene to styrene in a fluid-bed reactor-regenerator system, which uses a catalyst based on iron oxide supported on a modified alumina and promoted with further metal oxides. |
| 6833013 |
Process for the production of synthesis gas |
December 21, 2004 |
| Process for the production of synthesis gas, by means of catalytic partial oxidation or autothermal reforming of light hydrocarbons, which comprises partially oxidizing the hydrocarbon with oxygen coming from the reduction of at least one metal oxide selected from hexavalent chromium oxi |
| 6534685 |
Liquid mixture consisting of diesel gas oils and oxygenated compounds |
March 18, 2003 |
| A liquid mixture is described having a cetane number higher than 40, characterized in that it consists of: a typical diesel gas oil cut having a boiling point ranging from 150 to 380.degree. C. and a density ranging from 0.76 to 0.935 g/ml at 15.degree. C.; one or more compounds se |
| 6500999 |
Process for the production of hydrocarbons with a high octane number by means of the selective d |
December 31, 2002 |
| A process is described for the production of hydrocarbons with a high octane number starting from hydrocarbon cuts containing isobutene by means of selective dimerization with acid catalysts, characterized in that the dimerization reaction is carried out in a tubular reactor using a feed |
| 6433238 |
Process for the production of hydrocarbons with a high octane number by the selective dimerizati |
August 13, 2002 |
| A process is described for the production of hydrocarbons with a high octane number starting from hydrocarbon cuts containing isobutene by selective dimerization with acid catalysts, characterized in that the dimerization reaction is carried out in the presence of tertiary alcohols, |
| 6414210 |
Process for the separation of light olefins from paraffins |
July 2, 2002 |
| Process for the separation of light olefins from paraffins contained in mixtures, optionally also containing hydrogen, comprising bringing said mixtures into contact with an aqueous solution of one or more compounds of silver, preferably silver nitrate, and one or more ferric compounds, |
| 6412684 |
Protective lining for pressure equipment which can be used in processes for the synthesis of ure |
July 2, 2002 |
| The present invention relates to a new type of lining with two layers, one of which, obtained by welding deposit, can be used for the protection of internal surfaces of chemical equipment capable of abide pressures lower than 100 MPa, in processes for the direct synthesis of urea. The pr |
| 6267289 |
Safety process for pressure equipment in contact with corrosive fluids |
July 31, 2001 |
| Method for the safety and extension of the operating life of pressure equipment having an internal chamber suitable for containing a process fluid, surrounded by a pressure-resistant body (1) equipped with weep-holes (2), made of a material subject to corrosion by contact with said p |
| 6242660 |
Catalytic system and process for dehydrogenating ethylbenzene to styrene |
June 5, 2001 |
| Catalytic system for dehydrogenating ethylbenzene to styrene, containing chromium oxide, tin oxide, at least one oxide of an alkaline metal (M) and an alumina carrier, in delta or theta phase or in a mixture of delta+theta or theta+alpha or delta+theta+alpha phases, modified with silica, |
| 6241791 |
Liquid mixture suitable as gasoline |
June 5, 2001 |
| Liquid mixture suitable as gasoline characterized in hat it has a RON octane number equal to or higher than 90 and a MON octane number equal to or higher than 80 and that it essentially consists of:a typical gasoline cut, having a boiling point ranging from 30 to 220.degree. C. consistin |
| 6218583 |
Process for the production of ethers from alcohols |
April 17, 2001 |
| Process for the production of ethers starting from alcohols, in the presence of liquid acid catalysts, essentially comprising the following steps:a) sending a stream containing C.sub.4 -C.sub.10 alcohols to a reaction zone obtaining a product essentially consisting of ethers and the acid |
| 6118037 |
Process for the removal of contaminant compounds containing one or more heteroatoms of sulfur, n |
September 12, 2000 |
| Process for the removal of contaminant compounds containing one or more heteroatoms of sulfur, nitrogen and/or oxygen from hydrocarbon streams characterized in that it comprises:an adsorption step in which said compounds are adsorbed by means of an adsorber essentially consisting of sili |
| 6111162 |
Process for removing oxygenated contaminants from hydrocarbon streams |
August 29, 2000 |
| Process for selectively removing oxygenated contaminants from streams prevalently containing hydrocarbons with from 3 to 8 carbon atoms characterized in that it comprises an adsorption step wherein said contaminants are adsorbed by an adsorbent essentially consisting of silica gel at |
| 6031143 |
Process for the production of styrene |
February 29, 2000 |
| Process for the production of styrene which comprises:a) feeding to an alkylation unit a stream of benzene and a stream of recycled product containing ethylene;b) mixing the stream at the outlet of the alkylation unit, containing ethylbenzene, with a stream consisting of ethane;c) feeding th |
| 6011191 |
Process for the production of hydrocarbons with a high octane number by the selective dimerizati |
January 4, 2000 |
| A process is described for the production of hydrocarbons with a high octane number starting from hydrocarbon cuts containing isobutene by selective dimerization with acid catalysts characterized in that the dimerization reaction is carried out in the presence of primary alcohols and |
| 6010669 |
Method for restoring the functionality of equipment subjected to heavy corrosion in a plant for |
January 4, 2000 |
| A method for repairing and restoring the functionality of equipment subjected to internal corrosion during its operation at high or medium pressure in a plant for the synthesis of urea. The method includes the cleaning of the corroded area, the formation of suitable supporting and/or |
| 5994258 |
Catalytic system and process for dehydrogenating ethylbenzene to styrene |
November 30, 1999 |
| Catalytic system for dehydrogenating ethylbenzene to styrene, containing chromium oxide, tin oxide, at least one oxide of an alkaline metal (M) and an alumina carrier, in delta or theta phase or in a mixture of delta+theta or theta+alpha or delta+theta+alpha phases, modified with silica, |
| 5955640 |
Integrated process for the production of butene-1 |
September 21, 1999 |
| Integrated process for the production of butene-1 which comprises feeding a C.sub.4 hydrocarbon stream to a separation unit of butene-1 and recycling the remaining stream to the same unit after treatment in a bond isomerization section to convert the remaining butenes-2 into butene-1, a |
| 5932090 |
Process for the conversion of heavy crude oils and distillation residues to distillates |
August 3, 1999 |
| The process for the conversion of heavy crude oils or distillation residues to distillates comprises the following steps:mixing the heavy crude oil or distillation residue with a suitable hydrogenation catalyst and sending the mixture obtained to a hydrotreating reactor introducing hydro |
| 5921713 |
Method for connecting underwater pipelines particularly suitable for great depths and big diamet |
July 13, 1999 |
| A method of connecting underwater pipelines by installation of a pipeline on a seabed fixed frame; laying of an outboard pipeline by a lay barge; installation of a subsea winch with the frame; actuation of the winch by a ROV to unwind the cable of the winch, aided by another ROV bringing |
| 5886222 |
High yield process for urea synthesis |
March 23, 1999 |
| Improved yield process for urea synthesis by starting from ammonia and carbon dioxide, comprising a reaction zone under high pressure and temperature conditions, a section wherein a portion of unreacted ammonia and carbon dioxide are stripped and recycled to the reactor, which section |
| 5856585 |
Process of catalytic partial oxidation of natural gas in order to obtain synthesis gas and forma |
January 5, 1999 |
| Process of catalytic partial oxidation of natural gas in order to obtain synthesis gas and formaldehyde, integrated with processes of hydrogenation of the resulting CO, such as Fischer-Tropsch and methanol syntheses. Such an oxidation is carried out by means of a catalyst constituted by |
| 5767166 |
Process for producing mixtures of methanol and higher alcohols |
June 16, 1998 |
| Process for producing mixtures of methanol and higher alcohols comprising feeding, into the reaction zone equipped with a catalytic system, H.sub.2, CO and possibly inert products with a molar ratio H.sub.2 /CO of between 0.2 and 10, at a temperature of between 200.degree. and 460.degree |
| 5763660 |
High yield process for urea synthesis |
June 9, 1998 |
| Improved yield process for urea synthesis by starting from ammonia and carbon dioxide, comprising a reaction zone under high pressure and temperature conditions, a section wherein a portion of unreacted ammonia and carbon dioxide are stripped and recycled to the reactor, which section |
| 5750780 |
Process for the synthesis of urea comprising two separate reaction zones |
May 12, 1998 |
| A process for the synthesis of urea starting from ammonia and carbon dioxide, comprising a reaction step carried out in at least two distinct operating zones basically at the same pressure, but having a different operating temperature, the difference being preferably between 5.degree. |
| 5736003 |
Apparatus for concentrating urea solutions under vacuum |
April 7, 1998 |
| Process for vacuum-concentrating urea solutions in which the final step of evaporation of the urea solution under vacuum is carried out within the injection of overheated water vapor in the overhead portion of the concentrator, in order to counteract the formation and deposition of h |
| 5723687 |
Process for the joint production of ethers and hydrocarbons with a high octane number |
March 3, 1998 |
| A process is described for the joint production of ethers and hydrocarbons with a high octane number starting from C.sub.4 hydrocarbon cuts containing isobutene, by oligomerization with acid catalysts, in the presence of primary alcohols selected from methanol or ethanol in such a qu |
| 5656243 |
Fluidized bed reactor and process for performing reactions therein |
August 12, 1997 |
| A fluidized bed reactor operating under countercurrent gas-solid flow conditions wherein the reactor is supplied with horizontal baffles having separate passages through which the gas and the solid flow, such that the ascending gas leaves the baffle in a point higher than the point in wh |
| 5633421 |
Process for dehydrogenating light paraffins in a fluidized bed reactor |
May 27, 1997 |
| A process for dehydrogenating light paraffins, in particular C.sub.2 -C.sub.5, to obtain the corresponding light olefins, comprising reacting said paraffins with a catalytic system containing platinum, tin and an alumina support and possibly an element of the lanthanide group in a fl |
| 5610202 |
Catalyst system and process for the liquid-phase production of methanol from synthesis gas |
March 11, 1997 |
| A catalyst system for the liquid-phase production of methanol from synthesis gas is described, consisting of:one or more copper compounds;one or more alkoxides of the lanthanum group of formula (R.sub.1 O).sub.x Ln and/or one or more inorganic oxides of the lanthanum and/or aluminium gro |
| 5600054 |
Process for the skeleton isomerization of linear olefins |
February 4, 1997 |
| Process for the skeleton isomerization of linear olefins, preferably n-butenes or n-pentenes, which consists in putting said olefins in contact with a catalyst comprising alumina on whose surface boron oxide is deposited in a quantity which is lower than 2.1.times.10.sup.-4 g/m.sup.2 |
| 5578744 |
Catalytically active gel and a process for its preparation |
November 26, 1996 |
| A catalytically active gel is described consisting of a silica matrix with uniform porosity, monomodal pore distribution and high surface area, within which one or metal oxides possessing catalytic activity are dispersed. A process for preparing this catalytic gel is also described. |
| 5563299 |
Integrated process for the simultaneous production of alkyl tert-butyl ethers and 1-butene |
October 8, 1996 |
| An integrated process for the simultaneous production of alkyl tert-butyl ethers and 1-butene, comprising feeding a C.sub.4 hydrocarbon stream to an etherification unit and recycling the remaining stream to the same unit after possible separation of the 1-butene and treatment in an i |
| 5540522 |
Seismic joint for underwater floating tunnels |
July 30, 1996 |
| This invention provides a seismic joint for an underwater floating tunnel having: (a) a joint portion (i) having a transverse section essentially the same as that of the tunnel, (ii) being rigidly fastened to land at one end (A) thereof, and (iii) being elastically constrained to the tun |
| 5527961 |
Process for reducing the ammonia content of a gaseous effluent from urea production plants |
June 18, 1996 |
| A process for neutralizing the ammonia present in the molten urea originating from the concentration section of a plant for its production, comprising adding to the molten urea a small quantity of an acid. |
| 5510541 |
Process for the telomerization of conjugated dienes and suitable catalyst therefor |
April 23, 1996 |
| Mono-alkadienyl alkyl ethers and di-alkadienyl alkyl ethers are prepared by telomerization of a conjugated diene, by causing said conjugated diene to react with an aliphatic alcohol or an aliphatic diol respectively, by operating in an aqueous/organic biphasic liquid system, in the prese |
| 5493059 |
Process for preparing tertiary alkyl ethers and apparatus for reactive distillation |
February 20, 1996 |
| A process for the preparation of tertiary alkyl ethers, in particular methyl-tert.-butyl-ether (MTBE), from iso-olefins and aliphatic alcohols by means of a fractionation tower is disclosed, in which the main characteristic of the fractionation tower consists in that the reaction mix |
