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| Number | Title | Issue Date |
| 7342145 | Process for refining liquefied petroleum gas in a commercial scale The present invention relates to a novel process for refining the liquefied petroleum gas (LPG) in a commercial scale. The process comprises: sequentially performing fine desulfurization and mercaptan conversion of the LPG after alcohol amine treatment through desul... | 03/11/2008 |
| 7276153 | Method for neutralising a stream of hydrocarbon fluid In a process for deacidifying a fluid hydrocarbon stream which comprises carbon dioxide (CO2) and/or other acid gases as impurities, the fluid stream is brought into intimate contact with an absorption liquid in an absorption or extraction zone (12... | 10/02/2007 |
| 7244352 | Selective hydroprocessing and mercaptan removal A process for producing a naphtha having a decreased amount of sulfur by selective hydroprocessing a petroleum feedstream comprising cracked naphtha to reduce its sulfur content with minimum loss of octane. The reduced sulfur naphtha stream contains mercaptan sulfur... | 07/17/2007 |
| 7223332 | Reactor and process for mercaptan oxidation and separation in the same vessel The present invention is an apparatus and process for oxidizing mercaptans in a preferably kerosene stream. By using a catalyst promoter, sufficient separation of hydrocarbon and aqueous alkali occurs in the reactor vessel to obviate the need for a settling tank. He... | 05/29/2007 |
| 7211665 | Sulfide scavenger 1,3,5-(2H2,4H2,6H2) tripropanediamine N,N,N′,N′,N″,N″ hexamethyl is used to scavenge sulfur compounds from hydrocarbons. A novel method of making the triazine comprises autocondensing (CH3)2NCH2 | 05/01/2007 |
| 7208437 | Catalyst and method for its manufacture A catalyst is synthesized by a method in which a catalytic metal such as platinum or another noble metal is dispersed onto a support member. A transition metal macrocycle is also adsorbed onto the support, and the support is heat treated so as to at least partially ... | 04/24/2007 |
| 7077297 | Method for preparation of biocides mixed with carbon dioxide in a pressurized container This invention relates to a method for the preparation and metering of substances, mixtures of substances and/or compounds in general, characterized by bacteriostatic and/or bactericidal activity, using a single pressurized container in which the substances, mixture... | 07/18/2006 |
| 7049266 | Layered double hydroxides supported nanopalladium catalysts for Heck-, Suzuki, Sonogashira-, and Stille type coupling reactions of haloarenes Processes for the preparation of nanopalladium (0) catalysts are disclosed. In some embodiments, the nanopalladium (0) catalysts may be reusable. In some embodiments, the nanopalladium (0) catalysts may be heterogeneous. Nanopalladium (0) catalysts may be employed f... | 05/23/2006 |
| 7029573 | Composition and control method for treating hydrocarbon The invention relates to a composition and method for treating liquid hydrocarbons in order to remove acidic impurities, such as mercaptans, particularly mercaptans having a molecular weight of about C4 (C4H10S=90 g/mole) and higher,... | 04/18/2006 |
| 7014751 | Continuous liquid hydrocarbon treatment method The invention relates to a method for treating and upgrading a hydrocarbon containing acidic species such as mercaptans, comprising: (a) contacting the hydrocarbon, in the essential absence of oxygen, with a first phase of a treatment composition containing w... | 03/21/2006 |
| 6960291 | Naphtha desulfurization method The invention relates to a method for desulfurizing naphtha boiling-range hydrocarbons such as cracked naphtha. More particularly, the invention relates to hydrotreating the naphtha under selective hydrotreating conditions, and then removing mercaptans from the hydr... | 11/01/2005 |
| 6900366 | Process for upgrading of Fischer-Tropsch products A process for treating nitrogen-containing, substantially paraffinic product derived from a Fischer-Tropsch process. The substantially paraffinic product is purified in a purification process to lower the concentration of oxygen, nitrogen, and other impurities. The ... | 05/31/2005 |
| 6881325 | Preparation of components for transportation fuels Economical processes are disclosed for the production of components for refinery blending of transportation fuels by selective oxidation of feedstocks comprising a mixture of hydrocarbons, sulfur-containing and nitrogen-containing organic compounds. Oxidation feedst... | 04/19/2005 |
| 6755964 | Process for the fixed bed sweetening of petroleum distillates using halogenated metal phthalocyanine as a catalyst A process for fixed bed sweetening of petroleum distillates using halogenating metal phthalocyanine as a catalyst comprising impregnating the catalyst on activated charcoal bed by circulating alcoholic alkaline solution of the catalyst through charcoal bed till colo... | 06/29/2004 |
| 6656977 | Alkyl glycidyl ether-capped polyamine foam control agents A method for controlling the foaming of an aqueous organic compound-containing composition by the incorporation of a foam controlling amount of a compound of the formula: ##STR1## where n and m are 2 or 3, x is 1-6, ##STR2## R' is a C4 to C22 alky... | 12/02/2003 |
| 6565740 | Process for sweetening of LPG, light petroleum distillates by liquid-liquid extraction using metal phthalocyanine sulphonamide catalyst The present invention related to a process for sweetening of LPG light petroleum distillates by liquid liquid extraction using metal phtalocyanine sulphonamide catalyst which comprises extracting the mercaptanes contain in LPG, light petroleum distillate ... | 05/20/2003 |
| 6444117 | Sweetening of sour crudes The general object of this invention is to provide an improved process for sweetening and desulfurizing sulfur-containing crude oil streams. Heating the sulfur-containing crude oil stream to an elevated temperature for an extended period of time while sti... | 09/03/2002 |
| 6352640 | Caustic extraction of mercaptans (LAW966) The invention describes a method for preparing a low sulfur motor gasoline utilizing ethanol and caustic extraction.... | 03/05/2002 |
| 6320090 | Method of removing contaminants from petroleum distillates Polynuclear aromatic hydrocarbons (PAHs) and other contaminants are removed from petroleum distillates by mixing a solvent with petroleum distillate to extract the contaminants therefrom. The solvent is recovered and distilled to separate the contaminants... | 11/20/2001 |
| 6187227 | Thiacrown ether compound corrosion inhibitors for alkanolamine units The corrosion of metals in contact with aqueous alkanolamine solution in acid gas removal units is inhibited by adding to the alkanolamine solution a corrosion inhibiting amount of a thiacrown ether compound. The compounds are monomeric or polymeric and h... | 02/13/2001 |
| 6027636 | Sulfur removal from hydrocarbon fluids by mixing with organo mercaptan and contacting with hydrotalcite-like materials, alumina, bayerite or brucite Elemental sulfur and sulfur contaminants causing silver corrosion and present in fluids such as refined petroleum products, e.g., gasoline, jet, diesel, kerosene or fuel additives such as ethers, is removed from such fluids by contacting the contaminated ... | 02/22/2000 |
| 6013175 | Quaternary ammonium hydroxides as mercaptan scavengers A method for scavenging mercaptans in a hydrocarbon fluid is disclosed. According to the method, an effective mercaptan-scavenging amount of an aqueous scavenging composition is added to the fluid. The composition comprises a quaternary ammonium hydroxide... | 01/11/2000 |
| 5885487 | Corrosion inhibitor for alkanolamine units The corrosion of metals in contact with aqueous alkanolamine solution in acid gas removal units is inhibited by maintaining in the alkanolamine solution a corrosion inhibiting amount of a compound having the formula: ##STR1## where R is S or O, and R... | 03/23/1999 |
| 5840177 | Quaternary ammonium hydroxides as mercaptan scavengers A method for scavenging mercaptans in a hydrocarbon fluid is disclosed. According to the method, an effective mercaptan-scavenging amount of an aqueous scavenging composition is added to the fluid. The composition comprises a quaternary ammonium hydroxide... | 11/24/1998 |
| 5744024 | Method of treating sour gas and liquid hydrocarbon Reaction of 1,3,5-tri-substituted-hexahydro-1,3,5-triazine is accelerated in H2 S scavenging by the addition of quaternary ammonium compound. The preferred hexahydro triazines are 1,3,5-tri-methyl-hexahydro-1,3,5-triazines and 1,3,5-tri-me... | 04/28/1998 |
| 5683574 | Method for the extraction of low molecular weight mercaptans from petroleum and gas condensates Low molecular weight mercaptans are extracted from petroleum (e.g., crude oil) or gas condensate by contacting the mercaptans with oxygen in an aqueous solution of a metal hydroxide in the presence of a cobalt dihalodihydroxydisulfophthalocyanine catalyst... | 11/04/1997 |
| 5625117 | Fuel gas stripping of rich amine to remove hydrocarbons Minor amounts of C3 -C4 hydrocarbons from amine absorbents used in removing H2 S liquid C3 -C4 hydrocarbon are recovered. The process features recovery of the C3 -C4 hydrocarbon in a ... | 04/29/1997 |
| 5593932 | Process for sweetening a sour hydrocarbon fraction using a mixture of a supported metal chelate and a solid base A catalytic mixture of discrete solid materials and a mercaptan oxidation process for using the catalytic mixture have been developed. The catalytic mixture comprises a metal chelate dispersed on a non-basic solid support and a solid base. The process inv... | 01/14/1997 |
| 5591323 | Process for sweetening petroleum cuts without regular addition of alkaline solution using a basic solid catalyst A process for sweetening a petroleum cut containing mercaptans, wherein said petroleum cut is subjected to oxidation conditions by being contacted with a porous catalyst, in the presence of air said process being characterised in that said catalyst compri... | 01/07/1997 |
| 5529967 | Process for sweetening a sour hydrocarbon fraction using a supported metal chelate and a solid base A catalytic system of physically separate and discrete solid materials and a mercaptan oxidation process for using the catalytic system have been developed. The catalytic system comprises a supported metal chelate dispersed on a non-basic solid support an... | 06/25/1996 |
| 5462721 | Hydrogen sulfide scavenging process The levels of hydrogen sulfide and organic sulfides present in gaseous or liquid hydrocarbon streams or mixtures thereof are reduced by contacting the streams with a composition comprising the reaction product of aminoethylpiperazine, an alkanolamine, an ... | 10/31/1995 |
| 5413704 | Process for sweetening a sour hydrocarbon fraction using a mixture of a supported metal chelate and a solid base A catalytic mixture of discrete solid materials and a mercaptan oxidation process for using the catalytic mixture have been developed. The catalytic mixture comprises a metal chelate dispersed on a non-basic solid support and a solid base. The process inv... | 05/09/1995 |
| 5413701 | Process for sweetening a sour hydrocarbon fraction using a supported metal chelate and a solid base A catalytic system of physically separate and discrete solid materials and a mercaptan oxidation process for using the catalytic system have been developed. The catalytic system comprises a supported metal chelate dispersed on a non-basic solid support an... | 05/09/1995 |
| 5401390 | Catalyst for sweetening a sour hydrocarbon fraction containing metal oxide solid solution and magnesium oxide A catalyst and a process for using the catalyst have been developed. The catalyst is a metal chelate dispersed on a basic support which is a combination of a solid base and a secondary component. The solid base can be a solid solution of metal oxides and/... | 03/28/1995 |
| 5382354 | Process for the fixed-bed sweetening of sour petroleum distillates with fraction temperatures of from about 125 to about 350 degrees C. A process for the fixed-bed sweetening of sour petroleum distillates with fraction temperatures of from about 125° to about 350° C. and having an acid number of 0.03 mg of KOH/g or higher. The reduction of the acidity and the oxidation of the mercaptans... | 01/17/1995 |
| 5344555 | Treatment of oils using reaction products of epoxides and tertiary amines Sour sulfhydryl group containing oils are treated with an effective amount of a sweetening, hydrogen sulfide vapor reducing quaternary ammonium compound of the formula ##STR1## (a) wherein (i) R1, R2 and R3 are hydroc... | 09/06/1994 |
| 5340465 | Use of a metal oxide solid solution for sweetening a sour hydrocarbon fraction An improved process for treating a sour hydrocarbon stream has been developed. This process involves contacting the sour hydrocarbon fraction with a metal oxide solid solution in the presence of an oxidizing agent such as air or oxygen. One example of a s... | 08/23/1994 |
| 5286372 | Process for sweetening a sour hydrocarbon fraction using a solid base A process for treating a hydrocarbon fraction which contains mercaptans has been developed. The process uses a novel catalyst which is composed of a metal chelate dispersed on a basic support which is either a solid solution of metal oxides or a layered d... | 02/15/1994 |
| 5283006 | Neutralizing amines with low salt precipitation potential A method for neutralizing acidic species and inhibiting the deposition of amine acid salts on the internal surfaces of elevated temperature processing units in a petroleum refinery comprising adding to the hydrocarbon liquid being processed therein a tert... | 02/01/1994 |
| 5273646 | Process for improving the activity of a mercaptan oxidation catalyst This invention relates to a process for improving the activity of a catalyst effective in sweetening a hydrocarbon fraction containing mercaptans. The process involves adding to the hydrocarbon fraction an effective amount of an aqueous solution comprisin... | 12/28/1993 |
