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| Number | Title | Issue Date |
| 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 |
| 7235183 | Glycerine foots salt separation system The present invention provides a method and apparatus for the recovery of salt from a glycerine process, allowing the salt to be used in a brine solution. A salt settling tank is positioned inline between the foots from a crude still bottom and a foot still. Salt se... | 06/26/2007 |
| 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 |
| 7207445 | Device and method for non-dispersive contacting of liquid—liquid reactive system An apparatus for separating impurities from a liquid by a non-dispersive contacting of a liquid—liquid reactive systems, the liquids being immiscible with each other, having a cylindrical column separated into a first stage and a second stage, a plurality of modul... | 04/24/2007 |
| 7108156 | Post-mix beverage dispenser for frothed beverages A post-mix beverage dispenser includes a diluent jet directed at a wall of a mixing chamber thereof such that a swirling descending mass of diluent is formed. A concentrate dispensing outlet ejects concentrate into the swirling mass of diluent causing turbulent mixi... | 09/19/2006 |
| 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 |
| 6860999 | 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 treatm... | 03/01/2005 |
| 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 |
| 6740619 | Process for the preparation of a catalyst useful for liquid-liquid sweetening LPG and light petroleum distillates The present invention relates to a process for the preparation of metal phthalocyanine sulphonamide [MPc(SO2NHR)x] catalyst useful for sweetening of LPG and light petroleum distillates which comprises reacting a metal phthalocyanine with chloro... | 05/25/2004 |
| 6709639 | Apparatus for purification of raw gasoline from catalytic cracking An apparatus for the purification of catalytic cracking gasolines containing dienic and/or acetylenic impurities, and mercaptans, said apparatus comprising at least one selective hydrogenation reactor 3 containing at least one fixed catalyst bed, and having a... | 03/23/2004 |
| 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 |
| 6547959 | Method for treating hazardous and corrosion-inducing sulfur compounds A method for treating compounds which contain reactive sulfur is disclosed, wherein the treatment produces compounds which contain sulfur in a non reactive form. The method is based on the use of an oxidizing compound selected from the group consisting of... | 04/15/2003 |
| 6488840 | Mercaptan removal from petroleum streams (Law950) This invention relates to reducing the amount of thiols (mercaptans) in petroleum streams, specifically, mercaptans above the five carbon molecular weight range.... | 12/03/2002 |
| 6372124 | Removal of impurities from hydrocarbon streams The invention provides a method of purifying hydrocarbon streams from metallic impurities which comprises passing the stream through media comprising alumina with relatively minor amounts of calcia and magnesia.... | 04/16/2002 |
| 6187173 | Process for purification of raw gasoline from catalytic cracking A process and apparatus for treating raw gasoline from catalytic cracking to obtain gasoline with the qualities required for use as motor fuel comprises selective hydrogenation followed by stabilization and optional cooling of the effluent, then sweetenin... | 02/13/2001 |
| 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 |
| 5997731 | Process for treating an effluent alkaline stream having sulfur-containing and phenolic compounds An alkaline solution containing dissolved sodium sulfides, mercaptides and phenolates is treated with a carbon dioxide-containing solvent in a reaction zone under mass transfer conditions to neutralize effluent alkaline solution and recover processable hy... | 12/07/1999 |
| 5961820 | Desulfurization process utilizing an oxidizing agent, carbonyl compound, and hydroxide Sulfur-containing carbonaceous materials are desulfurized by reaction with a mixture of an oxidizing agent and a carbonyl compound under alkaline conditions at a temperature ranging from ambient temperature to about 250° F. and a pressure of about 1 atmo... | 10/05/1999 |
| 5961819 | Treatment of sour hydrocarbon distillate with continuous recausticization An improved process is described for removing mercaptan sulfur from sour hydrocarbon distillate streams comprising of treating a sour hydrocarbon distillate stream in two oxidation zones within a reaction vessel. The first treatment occurs in the presence... | 10/05/1999 |
| 5871637 | Process for upgrading heavy oil using alkaline earth metal hydroxide The present invention relates to a continuous in-situ process for reducing the viscosity, corrosivity and density of heavy oils comprising the steps of (a) contacting a heavy oil with an aqueous alkaline earth, Group IIA metal hydroxide at a temperature o... | 02/16/1999 |
| 5865989 | Process for sweetening liquid hydrocarbons A process for sweetening high mercaptan content gasoline or other liquid hydrocarbons is disclosed which utilizes aqueous caustic solution. A recycle stream is used to increase the conversion potential by reducing the relative mercaptan concentration of t... | 02/02/1999 |
| 5626742 | Continuous in-situ process for upgrading heavy oil using aqueous base The present invention relates to a continuous in-situ process for the removal of organically bound sulfur existing as mercaptans, sulfides and thiophenes comprising the steps of (a) contacting a heavy oil with aqueous sodium hydroxide at a temperature of ... | 05/06/1997 |
| 5601702 | Removal of acidic halides from gas streams Acidic halides, especially chlorides, are removed from gas by contact with particles of solid caustic covered by aqueous and hydrocarbon phases, respectively. Effective neutralization is achieved without swelling or plugging the bed of solid caustic. Hali... | 02/11/1997 |
| 5595648 | Two phase removal of halides from liquid hydrocarbons cross-reference to related applications Acidic halides, especially chlorides, are removed from dry liquid hydrocarbon streams such as catalytic reformate by contact with large particles of low surface area solid caustic such as a bed of NaOH pellets. Effective neutralization is achieved in a be... | 01/21/1997 |
| 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 |
| 5326456 | Upgrading of bitumen asphaltenes by hot water treatment containing carbonate (C-2726) A process for upgrading bitumen asphaltenes obtained from tar sands to hydrocarbons which comprises contacting the bitumen with a deasphalting solvent to yield a deasphalted oil and a residual solid asphaltene, separating the residual solid asphaltene fro... | 07/05/1994 |
| 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 |
| 5271835 | Process for removal of trace polar contaminants from light olefin streams A process is disclosed for improving catalyst performance and yields in the manufacture of motor gasoline components. More particularly the process is directed to the removal of H2 S, sulfur compounds, trace amounts of acetonitrile or acetone o... | 12/21/1993 |
| 5264187 | Treatment of hydrocarbons Method and apparatus are described whereby a caustic-treated hydrocarbon feed mixture having a contaminating concentration of water and sulfur compounds is treated by separating the hydrocarbon feed into a first stream and a second stream. The first strea... | 11/23/1993 |
| 5180484 | Caustic free liquid/liquid process for sweeting a sour hydrocarbon fraction This invention relates to a liquid-liquid process for treating a sour hydrocarbon fraction. The process comprises contacting the hydrocarbon fraction in the presence of an oxidizing agent with an aqueous solution containing ammonium hydroxide, a metal che... | 01/19/1993 |
| 5169516 | Removal of arsenic compounds from light hydrocarbon streams A process for removal of arsenic from a hydrocarbon stream containing arsenic together with mercaptan and non-mercaptan sulfur compounds. The hydrocarbon stream is passed through at least two mercaptan oxidizing reactors in series wherein the mercaptans a... | 12/08/1992 |
| 5039398 | Elimination of caustic prewash in the fixed bed sweetening of high naphthenic acids hydrocarbons Although high naphthenic acid hydrocarbon feedstocks normally need to be washed with caustic prior to being sweetened in a fixed bed mercaptan-to-disulfide oxidation process to avoid bed plugging, the prewash can be eliminated if aqueous ammonia is used c... | 08/13/1991 |
| 4956324 | Catalyst containing dipolar compounds useful for sweetening a sour hydrocarbon fraction This invention relates to an improved catalyst for treating a sour hydrocarbon stream. The improvement comprises the use of a dipolar compound which has a positively charged atom and an electronegative group in the same structure. A particularly preferred... | 09/11/1990 |
| 4929340 | Catalyst and process for sweetening a sour hydrocarbon fraction using dipolar compounds This invention relates to an improved process and catalyst for treating a sour hydrocarbon stream. The improvement comprises the use of a dipolar compound which has a positively charged atom and an electronegative group in the same structure. A particular... | 05/29/1990 |
| 4913802 | Process for sweetening a sour hydrocarbon fraction This invention relates to a process for sweetening a sour hydrocarbon fraction containing mercaptans. The process involves contacting the hydrocarbon fraction in the presence of an oxidizing agent with a catalytic composite, ammonium hydroxide and a quate... | 04/03/1990 |
| 4908122 | Process for sweetening a sour hydrocarbon fraction The present invention deals with a process for sweetening a sour hydrocarbon fraction containing mercaptans. The process involves contacting the hydrocarbon fraction in the presence of an oxidizing agent with a catalytic composite, ammonium hydroxide and ... | 03/13/1990 |
| 4906354 | Process for improving the thermal stability of jet fuels sweetened by oxidation The thermal stability of jet fuel sweetened by oxidation is improved by washing the sweetened fuel with strong aqueous caustic.... | 03/06/1990 |
| 4897180 | Catalytic composite and process for mercaptan sweetening This invention relates to a catalytic composite effective in oxidizing mercaptans contained in a sour petroleum distillate to disulfides. The catalytic composite comprises a metal chelate, an onium compound and optionally an alkali metal hydroxide. The on... | 01/30/1990 |
