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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 8398848 | Desulfurization of heavy hydrocarbons and conversion of resulting hydrosulfides utilizing copper metal The present invention is a process for desulfurizing hydrocarbon feedstreams with alkali metal compounds and regenerating the alkali metal compounds via the use of a copper metal reagent. The present invention employs the use of a copper metal reagent to convert spe... | 03/19/2013 |
| 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 |
| 7326333 | Apparatus and process for extracting sulfur compounds from a hydrocarbon stream Described is an apparatus and process for extracting sulfur compounds from a hydrocarbon stream. A prewash section for converting hydrogen sulfide to sodium sulfide by reaction with an alkali such as caustic communicates with an extractor section disposed directly a... | 02/05/2008 |
| 7270743 | Products produced form rapid thermal processing of heavy hydrocarbon feedstocks The present invention is directed to the upgrading of heavy hydrocarbon feedstock that utilizes a short residence pyrolytic reactor operating under conditions that cracks and chemically upgrades the feedstock. The process of the present invention provides for the pr... | 09/18/2007 |
| 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 |
| 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 |
| 7192516 | Desulfurization of petroleum streams using metallic sodium The invention is a method of removing sulfur from a hydrocarbon feed using the steps of dissolving metallic sodium in a solvent and combining the sodium/solvent solution with a liquid hydrocarbon feed containing an organosulfur species. The pressure of combination i... | 03/20/2007 |
| 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 |
| 6306288 | Process for removing sulfur compounds from hydrocarbon streams A process for removing H2 S and mercaptans from a hydrocarbon stream is disclosed. A hydrocarbon stream such as a LPG stream is contacted with a weakly basic stream, e.g., a sodium bicarbonate stream in order to extract the H2 S and ... | 10/23/2001 |
| 6224750 | Producing low sulfur hydrocarbons with biologically regenerated caustic A process is disclosed for producing very low sulfur content hydrocarbon streams by contacting a hydrocarbon feedstream with an aqueous alkaline treatment stream which has been regenerated by the biological conversion of sulfur compounds to elemental sulf... | 05/01/2001 |
| 6153100 | Removing iron salts from NGL streams The aqueous wash stream of an electrolytic precipitation system treating natural gas liquid (NGL) is maintained at a pH sufficiently basic to decrease the solubility of iron sulfide in the aqueous wash stream.... | 11/28/2000 |
| 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 |
| 5635056 | Continuous in-situ process for upgrading heavy oil using aqueous base The present invention relates to a continuous in-situ process for the removal from heavy oils, of organically bound sulfur in the form of mercaptans, sulfides and thiophenes, heteroatoms selected from the group consisting of nitrogen and oxygen and metals... | 06/03/1997 |
| 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 |
| 5268104 | Process for treating and regenerating spent caustic The present invention relates to a process for treating and regenerating a spent caustic solution at ambient temperatures which includes oxidizing the spent caustic stream with an air/ozone gas mixture, followed by irradiating the oxidized spent caustic s... | 12/07/1993 |
| 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 |
| 4875997 | Process for treating hydrocarbons containing mercaptans A process for treating hydrocarbons containing mercaptans comprising the steps of contacting a first mercaptan-containing hydrocarbon stream with a first aqueous alkaline solution stream to form a mercaptide-rich aqueous alkaline solution stream and a red... | 10/24/1989 |
| 4835338 | Process for removal of carbonyl sulfide from organic liquid by adsorption using alumina adsorbent capable of regeneration An adsorption process is disclosed for removal of carbonyl sulfide (COS) from a liquid hydrocarbon which comprises providing an activated alumina adsorbent which has preferably impregnated with a compound selected from the class consisting of one or more ... | 05/30/1989 |
| 4705620 | Mercaptan extraction process A process is disclosed for treating a sour hydrocarbon stream comprising extracting the mercaptans contained in said hydrocarbon stream with an alkaline solution in an extraction zone, oxidizing the mercaptans to disulfides in the presence of an oxidation... | 11/10/1987 |
| 4666689 | Process for regenerating an alkaline stream containing mercaptan compounds An alkaline solution containing mercaptides is regenerated in an improved process wherein the alkaline solution to be regenerated containing a suitable oxidation catalyst is contacted with an oxygen-containing solvent which is immiscible with said alkalin... | 05/19/1987 |
| 4626341 | Process for mercaptan extraction from olefinic hydrocarbons A process is disclosed for removing mercaptans from highly olefinic feed streams by extraction with an aqueous alkaline solution. The aqueous solution is preferably regenerated by oxidation of extracted mercaptans to disulfides. The invention employs two ... | 12/02/1986 |
| 4623445 | Sodium tetrachloroaluminate catalyzed process for the molecular weight reduction of liquid hydrocarbons A process for reducing the molecular weight of hydrocarbons using NaAlCl4 is provided wherein the hydrogen to carbon ratio of the liquid product slate is approximately the same as the feed material. The process comprises contacting the feed mat... | 11/18/1986 |
| 4562300 | Mercaptan extraction process A caustic wash process to remove mercaptans from a mixture of hydrocarbons, an improvement comprising washing the regenerated caustic with a fraction of said hydrocarbon to remove residual disulfides to improve the overall removal of sulfur from the hydro... | 12/31/1985 |
| 4504378 | Sodium tetrachloroaluminate catalyzed process for the molecular weight reduction of liquid hydrocarbons A process for reducing the molecular weight of hydrocarbons using NaAlCl4 is provided wherein the hydrogen to carbon ratio of the product slate is approximately the same as the feed material, comprising contacting the feed material with a molte... | 03/12/1985 |
| 4437980 | Molten salt hydrotreatment process A carbonaceous material is subjected to a hydrotreating process in which it is desulfurized, deasphalted and demetallized by reaction with hydrogen in a molten medium in the presence of potassium hydroxide and water. The water is present in an amount suff... | 03/20/1984 |
| 4417986 | Process for reducing the chemical oxygen demand of spent alkaline reagents An aqueous solution of spent alkaline reagent containing alkali metal mercaptides obtained from the treatment of a mercaptan-containing (i.e., sour) hydrocarbon fluid with an alkali metal hydroxide, e.g., sodium hydroxide (caustic) or potassium hydroxide,... | 11/29/1983 |
| 4412981 | Conversion of hydrogen sulfide to sulfur by direct oxidation In a process wherein hydrogen sulfide is converted to elemental sulfur in the presence of oxygen, an improvement is made by employing an alcoholic solution of an alkali metal hydroxide, free of iron-group salts or other heterogeneous catalysts. High yield... | 11/01/1983 |
| 4404098 | Mercaptan extraction process with recycled alkaline solution Water is removed from an alkaline solution used to extract mercaptans from a hydrocarbon stream by contacting a portion of the alkaline solution with a warm hydrocarbon vapor stream. The portion is removed from an extraction zone and reintroduced into an ... | 09/13/1983 |
| 4362614 | Mercaptan extraction process with recycled alkaline solution Water is removed from an alkaline solution used to extract mercaptans from a hydrocarbon stream by contacting the alkaline solution with a warm hydrocarbon vapor stream. The relatively warm and concentrated alkaline solution produced in this manner is the... | 12/07/1982 |
| 4347225 | Method for treating alkaline effluents resulting from petroleum processing The present invention is a method for treating alkaline effluents resulting from petroleum processing by incinerating the effluents in the presence of oxygen and a sufficient amount of hydrogen sulfide fuel to convert the alkaline material to the correspo... | 08/31/1982 |
| 4347226 | Method for treating sulfur-containing effluents resulting from petroleum processing The present invention is a method for disposal of noxious waste products generated in petroleum refining including spent caustic solution and concentrated sulfur effluent from treating of petroleum fractions to remove sulfur therefrom. Essentially the spe... | 08/31/1982 |
| 4290879 | Removal of carbonyl sulfide from liquid hydrocarbon streams Carbonyl sulfide is removed from propane and other similar liquefied petroleum gas products by mixing liquid methanol with the untreated liquefied gas and then contacting the liquid mixture with solid potassium hydroxide.... | 09/22/1981 |
| 4265735 | ZSM-5 Zeolite catalyzes dialkyl disulfide conversion to hydrogen sulfide Dialkyl disulfide waste, such as that formed in a caustic wash process for removing mercaptans from a hydrocarbon stream, is converted to hydrogen sulfide and valuable hydrocarbons by catalytic contact with a highly siliceous zeolite catalyst exemplified ... | 05/05/1981 |
| 4230184 | Sulfur extraction method Circulating oil used for removal of sulfur in sour gas wells is contacted with an aqueous solution of a lower polysulfide of an alkali metal or ammonia to form a higher polysulfide of the alkali metal or ammonia, and the oil is separated from the higher p... | 10/28/1980 |
| 4210526 | Desulfurizing fossil fuels Hydrated alkali metal sulfides used to remove sulfur from fossil fuels to form alkali metal polysulfides which are recycled to alkali metal sulfides and elemental sulfur by thermal or thermal reduced pressure decomposition of the alkali metal polysulfides... | 07/01/1980 |
| 4147611 | Regeneration of alkali metal sulfides from alkali metal hydrosulfides Alkali metal sulfides are regenerated from alkali metal hydrosulfides which are produced as a result of the hydroconversion of heavy carbonaceous feeds. The regeneration is effected by treating the spent solids from a hydroconversion reactor, said solids ... | 04/03/1979 |
| 4147612 | Regeneration of alkali metal sulfides from alkali metal hydrosulfides Alkali metal sulfides are regenerated from alkali metal hydrosulfides which are produced as a result of the hydroconversion of heavy carbonaceous feeds. The regeneration is effected by contacting the alkali metal hydrosulfide with a metal oxide at elevate... | 04/03/1979 |
| 4123350 | Process for desulfurization of residua with sodamide-hydrogen and regeneration of sodamide Sulfur-containing petroleum oil feedstocks which include heavy hydrocarbon constituents undergo simultaneous desulfurization and hydroconversion by contacting and reacting such feedstocks with sodamide in the presence of hydrogen and at elevated temperatu... | 10/31/1978 |
