Class / Patent application number | Description | Number of patent applications / Date published |
208212000 | With subsequent treatment of product | 12 |
20090188838 | PROCESS TO HYDRODESULFURIZE FCC GASOLINE RESULTING IN A LOW-MERCAPTAN PRODUCT - A process for reducing the sulfur content of a hydrocarbon stream, including: feeding a hydrocarbon stream including sulfur compounds to a catalytic distillation reactor having one or more hydrodesulfurization reaction zones; feeding hydrogen to the catalytic distillation reactor; concurrently in the catalytic distillation reactor: fractionating the hydrocarbon stream into a heavy fraction and a light fraction; contacting hydrogen and the light fraction to form H | 07-30-2009 |
20100155302 | Purification of ultralow sulfur diesel fuel - The invention is a method of purifying an ultralow sulfur diesel fuel which contains polycyclic aromatic color bodies. The method comprises contacting the ULSD fuel in the liquid phase with a coal-based activated carbon adsorbent having a surface area ranging from 800 to 1500 m | 06-24-2010 |
20110220550 | MILD HYDRODESULFURIZATION INTEGRATING TARGETED OXIDATIVE DESULFURIZATION TO PRODUCE DIESEL FUEL HAVING AN ULTRA-LOW LEVEL OF ORGANOSULFUR COMPOUNDS - Deep desulfurization of hydrocarbon feeds containing undesired organosulfur compounds to produce a hydrocarbon product having low levels of sulfur, i.e., 15 ppmw or less of sulfur, is achieved by first contacting the entire feed with a hydrodesulfurization catalyst in a hydrodesulfurization reaction zone operating under mild conditions to remove the labile organosulfur compounds. A flashing column downstream of the hydrodesulfurization reaction zone fractionates the effluent at a target cut point temperature to obtain two hydrocarbon fuel fractions. A first fraction boiling at or above the target cut point temperature contains the remaining refractory organosulfur compounds. A second fraction boiling below the target cut point temperature is substantially free of organosulfur compounds, since the organosulfur compounds boiling in the range of this fraction were the labile organosulfur compounds which were initially removed by mild hydrodesulfurization. The first fraction is contacted with an oxidizing agent and an active metal catalyst in an oxidation reaction zone to convert the refractory organosulfur compounds to oxidized organosulfur compounds. These oxidized organosulfur compounds are subsequently removed, producing a stream containing an ultra-low level of organosulfur compounds. The two streams can be combined to obtain a full range hydrocarbon product having an ultra-low level of organosulfur compounds. | 09-15-2011 |
20110226670 | PROCESS FOR REMOVING SULFUR FROM HYDROCARBON STREAMS USING HYDROTREATMENT, FRACTIONATION AND OXIDATION - Methods for removing sulfur from hydrocarbon streams using the sequential application of hydrodesulfurization, fractionation and oxidation. The hydrodesulfurization step is operative to remove easily-hydrogenated sulfur species, such as sulfides, disulfides and mercaptans. The resultant stream is then fractionated at a select temperature range to generate a sub-stream that is sulfur-rich with the sulfur species resistant to removal by hydrodesulfurization. The sub-stream is then isolated and subjected to an oxidative process operative to oxidize the sulfur species to sulfones or sulfoxides, which may then be removed by a variety of conventional methods, such as absorption. Alternatively, the methods may comprise using the sequential application of fractionation to generate a sulfur-rich sub-stream followed by oxidation and subsequent removal of the sulfur species present in the sub-fraction. The latter methods are ideally suited for transmix applications. | 09-22-2011 |
20120125819 | PROCESS FOR THE CONVERSION OF HYDROCARBONACEOUS FEEDSTOCK - A hydrocarbonaceous feedstock is converted in a process comprising the following steps: (a) the feedstock is contacted with hydrogen under hydrotreating conditions to yield hydrotreated product; (b) the hydrotreated product is subjected to a separation treatment to separate at least hydrogen from the hydrotreated product to obtain a liquid hydrotreated product stream; (c) at least a portion of the liquid hydrotreated product stream is subjected to a stripping treatment to separate a light product from the liquid hydrotreated product stream, leaving a heavy hydrotreated product; (d) the heavy hydrotreated product is separated under reduced pressure into a least one gaseous stripped fraction and at least one liquid stripped fraction in a separation zone, wherein at least a portion of a liquid stripped fraction is reheated and recycled to the separation zone, in which process at least a portion of the liquid stripped fraction is reheated by heat exchange between at least a portion of the liquid hydrotreated product stream and/or at least a portion of the heavy hydrotreated product. | 05-24-2012 |
20120145599 | INTEGRATED DESULFURIZATION AND DENITRIFICATION PROCESS INCLUDING MILD HYDROTREATING AND OXIDATION OF AROMATIC-RICH HYDROTREATED PRODUCTS - Reduction of sulfur-containing and nitrogen-containing compounds from hydrocarbon feeds is achieved by first contacting the entire feed with a hydrotreating catalyst in a hydrotreating reaction zone operating under mild conditions to convert the labile organosulfur and organonitrogen compounds. An extraction zone downstream of the hydrotreating reaction zone separates an aromatic-rich fraction that contains a substantial amount of the remaining refractory organosulfur and organonitrogen compounds. The aromatic-lean fraction is substantially free of organosulfur and organonitrogen compounds, since the non-aromatic organosulfur and organonitrogen compounds were the labile organosulfur and organonitrogen compounds which were initially removed by mild hydrotreating. The aromatic-rich fraction is oxidized to convert the refractory organosulfur and organonitrogen compounds to oxidized sulfur-containing and nitrogen-containing hydrocarbon compounds. These oxidized organosulfur and organonitrogen compounds are subsequently removed. | 06-14-2012 |
20130199968 | MILD HYDRODESULFURIZATION INTEGRATING GAS PHASE CATALYTIC OXIDATION TO PRODUCE FUELS HAVING AN ULTRA-LOW LEVEL OF ORGANOSULFUR COMPOUNDS - Desulfurization of hydrocarbon feeds is achieved by first contacting the entire feed with a hydrodesulfurization catalyst in a hydrodesulfurization reaction zone operating under mild conditions; a flashing column downstream of the hydrodesulfurization reaction zone fractionates the effluent to obtain a first fraction which contains refractory organosulfur compounds and a second fraction that is substantially free of organosulfur compounds, since the organosulfur compounds boiling in the range of this fraction were the labile organosulfur compounds which were initially removed by mild hydrodesulfurization. The first fraction is contacted with a gaseous oxidizing agent over an oxidation catalyst having a formula Cu | 08-08-2013 |
20130270155 | PROCESS FOR DESULFURIZATION OF DIESEL WITH REDUCED HYDROGEN CONSUMPTION - The present invention relates to a novel process for desulfurization of diesel with reduced hydrogen consumption. More particularly the subject invention pertains to an integrated process comprising diesel hydro de-sulfurisation (DHDS) or diesel hydrotreatment (DHDT) with reduced severity to desulfurize high sulfur (1.0-2.0 wt %) diesel stream to a much lower level of sulfur content of 350-500 ppm in the depleted diesel stream, followed by a novel adsorption procedure for effecting deep desulfurization to reduce overall sulfur content to less than 10 ppm with reduced hydrogen consumption, as compared to high severity DHDS or DHDT procedures of the prior art. | 10-17-2013 |
20140014556 | PROCESS FOR REDUCING ULTRA LOW SULFUR DIESEL COLOR - The present invention is a process for preparing ultra low sulfur diesel. The steps include reacting a feedstock of petroleum crude oil with hydrogen in the presence of a hydrodesulfurization catalyst under hydrodesulfurization conditions, fractionating the reaction products, flash distilling the bottoms fraction, condensing the volatile distillate fraction as ultra low sulfur diesel, and recycling the distillation bottoms fraction for further reacting with hydrogen. | 01-16-2014 |
20140251873 | INTEGRATED DESULFURIZATION AND DENITRIFICATION PROCESS INCLUDING MILD HYDROTREATING AND OXIDATION OF AROMATIC-RICH HYDROTREATED PRODUCTS - Reduction of sulfur-containing and nitrogen-containing compounds from hydrocarbon feeds is achieved by first contacting the entire feed with a hydrotreating catalyst in a hydrotreating reaction zone operating under mild conditions to convert the labile organosulfur and organonitrogen compounds. An extraction zone downstream of the hydrotreating reaction zone separates an aromatic-rich fraction that contains a substantial amount of the remaining refractory organosulfur and organonitrogen compounds. The aromatic-lean fraction is substantially free of organosulfur and organonitrogen compounds, since the non-aromatic organosulfur and organonitrogen compounds were the labile organosulfur and organonitrogen compounds which were initially removed by mild hydrotreating. The aromatic-rich fraction is oxidized to convert the refractory organosulfur and organonitrogen compounds to oxidized sulfur-containing and nitrogen-containing hydrocarbon compounds. These oxidized organosulfur and organonitrogen compounds are subsequently removed. | 09-11-2014 |
20150353844 | METHODS AND APPARATUSES FOR HYDROTREATING HYDROCARBONS - Methods and apparatuses are provided for hydrotreating hydrocarbons. A method includes heating a start-up oil in a stripper liquid fraction heat exchanger during a start-up period, and heating a reactor with the start-up oil. The start-up oil is discharged from the reactor when the start-up period ends, and a standard operating period begins after the start-up period. A reactor effluent is produced by introducing a hydrocarbon stream into the reactor during the standard operating period, where hydrogen sulfide is produced from an organic sulfur compound in the hydrocarbon stream. Steam is produced in the stripper liquid fraction heat exchanger during the standard operating period. | 12-10-2015 |
20150361355 | KEROSENE HYDROTREATING WITH A SEPARATE HIGH PRESSURE TRIM REACTOR - A process is presented for the production of high quality kerosene from lower quality feedstocks, including kerosene produced from coker units, or kerosene from cracking units. The process includes hydrotreating the feedstock to remove contaminants in the feedstock. The hydrotreated process stream is then treated in a trim reactor at higher pressure to reduce the bromine index of the kerosene. | 12-17-2015 |