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| Number | Title | Issue Date |
| 7811538 | Mercaptan removal method The method allows to remove mercaptans contained in a gaseous feed comprising hydrocarbons by carrying out the following stages: a) contacting, in a reactor R1, gaseous feed 1 with a liquid stream 13 comprising... | 10/12/2010 |
| 7604788 | Process for the conversion of polysulfanes The invention provides a process for the removal of polysulfanes from gas streams formed during H2S synthesis. ... | 10/20/2009 |
| 7419646 | Method of deacidizing a gas with a fractional regeneration absorbent solution The gaseous effluent flowing in through line 1 is contacted in absorption zone ZA with the liquid absorbent solution flowing in through line 9. The gaseous effluent depleted in acid compounds is discharged through line 2. The absorbent solution ... | 09/02/2008 |
| 7341701 | Method, apparatus and plant for treating culinary gaseous effluents A method and apparatus (22) for treating culinary gaseous effluents (Eg) carried in an air extraction duct of a kitchen, the apparatus includes: a unit (24) for storing in liquid form a nucleophilic active product (Pa... | 03/11/2008 |
| 7326393 | Process for the conversion of polysulfanes The invention provides a process for the removal of polysulfanes from gas streams formed during H2S synthesis. ... | 02/05/2008 |
| 7326392 | HS scavenging method A method for removing H2S from H2S-containing gaseous streams in which an H2S-containing gaseous stream is introduced into a flow channel and at least one liquid chemical H2S scavenging agent is also introduced into the fl... | 02/05/2008 |
| 7311758 | Method of purifying a natural gas by mercaptan adsorption The raw natural gas is deacidized and dehydrated in units DA and DH. The treated gas is then purified by adsorption of the mercaptans in first enclosure A1. Part of the purified gas is heated in E1, then fed into second enclosure A2 so as to dis... | 12/25/2007 |
| 7214358 | Low energy regenerable SOscrubbing process Sulphur dioxide is removed from gas streams by contacting the gas stream with an absorbing medium containing an amine capable of forming an amine salt, heat stable salt and sulfite. The level of heat stable salt is selected such that during the regeneration process ... | 05/08/2007 |
| 7192565 | Method of collecting mercaptans contained in a gaseous feed The gaseous feed flowing in through line 1 is contacted in contacting zone ZA with a liquid solvent flowing in through line 2. The solvent comprises between 0.001% and 100% by weight of a liquid olefin. Contacting in zone ZA is carried out in the prese... | 03/20/2007 |
| 7090812 | Phase transfer catalysis scrubber A method and system for reactively destroying alkyl halides in volume or stream of gas. The method and device employ nucleophilic reaction of the alkyl halide under phase transfer catalysis conditions. The method and system are useful for scrubbing applications requ... | 08/15/2006 |
| 6997119 | Combustion emissions control and utilization of byproducts A process for controlling both fireside ash deposits and corrosion, and fouling, corrosion, and emissions due to SO3 formation within a fossil-fuel-fired combustion system, such as a furnace forming part of an electrical power generating plant. A solution... | 02/14/2006 |
| 6960330 | Method for reducing H2S contamination Certain exemplary compositions, methods, and systems are disclosed that can be useful for reducing a concentration of a contaminant associated with a medium, which can be any substance or material, such as soil, water, air, and/or fluid. In one exemplary method, the... | 11/01/2005 |
| 6958136 | Process for the treatment of waste streams The present invention is directed to a process for treating, reducing, and/or stabilizing various wastes or flue gases. In one embodiment, the process is directed to treatment of alkali bearing wastes that include nitrate and/or nitrite-rich wastes. Optionally, the ... | 10/25/2005 |
| 6941742 | Method and device for reducing the number of particles in an exhaust gas To reduce the number of particles in an exhaust gas (A), in particular in the exhaust gas (A) from an internal-combustion engine, sulfur dioxide SO2 which is contained in the exhaust gas (A) is at least partially catalytically oxidized, in the presence of... | 09/13/2005 |
| 6881243 | Method for removing acidic gases from waste gas A method for removing acidic gases from waste gases is disclosed. The invention relates to a method for removing acid gases, in particular from SO2 and NOx, by contacting the waste gas with an emulsion of water in organic sulfoxides, in particu... | 04/19/2005 |
| 6663841 | Removal of H2S and/or mercaptans form supercritical and/or liquid CO2 A method for removing or scavenging hydrogen sulfide (H2 S) and/or mercaptans from supercritical and/or liquid carbon dioxide (CO2) using triazine scavenging agents is described. Preferred triazines are hexahydrotriazines.... | 12/16/2003 |
| 6652821 | Purificating agent for flue gas and incinerated ash and purificating method using the same The present invention provides a purifying agent having an effect of removing or decomposing toxic substances contained in flue gas or incinerated ash. The purifying agent of the present invention contains one or more kinds of salts selected from alkali m... | 11/25/2003 |
| 6645459 | Method of recovering sulfurous components in a sulfur-recovery process H2 S is removed from an H2 S-rich gas, and sulfur is produced, by a process in which the H2 S-rich gas is reacted with SO2 in a reactor in the presence of an organic solvent and a catalyst, an H2 S-co... | 11/11/2003 |
| 6531103 | Process for removing sulfur compounds from gas and liquid hydrocarbon streams The present invention provides a process for removing sulfur compounds including sulfur in the (-2) oxidation state such as mercaptans, dialkyl sulfides, carbonyl sulfide, hydrogen sulfide, thiophenes and benzothiophenes, from liquid or gas feed streams, ... | 03/11/2003 |
| 6375907 | Hydrogen sulfide abatement with scale control and/or well acidizing The emissions of hydrogen sulfide during the production of natural gas, oil or geothermal fluids from subterranean formations and the subsequent processing of these fluids is reduced by converting the hydrogen sulfide into a hydrogen halide or a halogen a... | 04/23/2002 |
| 6315968 | Process for separating acid gases from gaseous mixtures utilizing composite membranes formed from salt-polymer blends The present invention is a process for separating acid gas from gaseous mixtures containing acid gas and at least one non-acid gas. The process comprises bringing the gas stream into contact with a multilayer composite membrane comprising a non-selective ... | 11/13/2001 |
| 6280696 | Method and apparatus for removing high boiling point volatile organic compounds from an exhaust A method for removing high boiling point volatile organic compounds from an exhaust gas and an apparatus for performing such operation are described. In the method, a wet scrubber is provided which is equipped with a spent water reservoir at the bottom of... | 08/28/2001 |
| 6277344 | Simultaneous use of peroxygen and olefin compound in odor reduction Disclosed is a process for the treatment of a plant fluid effluent containing odor compounds including an alkyl mercaptan or an alkyl thiol, an amine compound, ammonia, hydrogen sulfide and mixtures thereof by contacting the plant effluent in either a cou... | 08/21/2001 |
| 6210454 | Apparatus for treating a gas containing hydrogen sulphide and sulphur dioxide An apparatus for treating a gas containing hydrogen sulphide and sulphur dioxide, comprising a liquid-gas reactor-contactor (2), means (3) for supplying gas to be treated and means (1) for supplying an organic solvent containing a catalyst, means (25) for... | 04/03/2001 |
| 6090356 | Removal of acidic gases in a gasification power system with production of hydrogen This invention is an integrated process which removes acidic gases such as H2 S, COS and CO2 from raw synthesis gas. The H2 S and COS is concentrated and separately recovered. The separately recovered CO2 is use... | 07/18/2000 |
| 5935547 | Process for treating gas containing hydrogen sulfide and sulphur dioxide, comprising a step for depleting the recycled solvent in sulphur In a process for treating a gas containing hydrogen sulphide and sulphur dioxide, such as Claus plant tail gas, to substantially reduce emission of sulphur vapor in the treated gases, the process a characterized in that the gas is brought into contact wit... | 08/10/1999 |
| 5891408 | Process for purifying flue gas containing nitrogen oxides A process and a device for purifying flue gas containing nitrogen oxides, in which the flue gas is scrubbed with a circulating scrubbing liquid which contains a transition metal chelate such as Fe (II) EDTA and the complex formed from nitrogen oxide and t... | 04/06/1999 |
| 5750083 | Method for the removal of hydrogen sulfide present in gases This invention relates to methods for the removal of hydrogen sulfide from various gases containing hydrogen sulfide. In order to remove hydrogen sulfide, an aqueous solution containing a di(lower alkyl)amino-(lower alkanol) or triethylenediamine is used.... | 05/12/1998 |
| 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 |
| 5718872 | Apparatus for controlling the hydrogen sulfide concentration in the acid gas feedstock of a sulfur recovery unit An apparatus for controlling the hydrogen sulfide concentration in an acid gas stream and the hydraulic loading of a sulfur recovery unit of the type having an absorber for contacting a sour gas stream with an absorbent, a regenerator for regenerating the... | 02/17/1998 |
| 5716587 | Apparatus for removal of contaminates from a gas stream An apparatus is disclosed for removal of contaminate(s) from a gas stream in an oil or gas refinery using an absorber-regenerator process wherein a portion of the contaminate rich overhead gas from the regenerator is utilized to increase the partial press... | 02/10/1998 |
| 5705135 | Composition and process for the removal of hydrogen sulfide from gaseous streams A method and apparatus for the removal of hydrogen sulfide (H2 S) from gaseous streams, particularly concentrations of H2 S lower than 100 ppm. The invention is particularly useful for removing H2 S from natural gas. The i... | 01/06/1998 |
| 5698172 | Oxidation-reduction process An improved oxidation-reduction process is disclosed that uses a non-aqueous polyvalent metal catalyst system to remove volatile sulfur contaminants from gas streams. In addition to desulfurizing, the process also is useful for decarbonating and dehydrati... | 12/16/1997 |
| 5693297 | Gas treatment method A system and method for injecting a gaseous contaminant absorbent through at least one spray nozzle into a pipe transporting gas to a contacting vessel wherein the gas is contacted with a liquid absorbent to remove at least one gaseous contaminant from th... | 12/02/1997 |
| 5674459 | Hydrogen peroxide for flue gas desulfurization A system for removing SO2, NO2, and other contaminants from flue gases uses hydrogen peroxide (H2 O2) as the reagent to convert the oxides of sulfur and some of the oxides of nitrogen (NO, NO2, etc.) ... | 10/07/1997 |
| 5672323 | Activated carbon flue gas desulfurization systems for mercury removal Activated carbon injection is provided for mercury removal in a flue gas treatment system having an electrostatic precipitator and a wet flue gas desulfurization tower by injecting fresh activated carbon into the flue along with recycled carbon from the e... | 09/30/1997 |
| 5609840 | Method for the removal of hydrogen sulfide present in gases This invention relates to methods for the removal of hydrogen sulfide from various gases containing hydrogen sulfide. In order to remove hydrogen sulfide, an aqueous solution containing a di(lower alkyl)amino-(lower alkanol) or triethylenediamine is used.... | 03/11/1997 |
| 5605635 | Method of purifying gaseous or liquid effluents containing sulfur derivatives Process for purifying gaseous or liquid effluents containing sulphur-containing derivatives (H2 S, alkyl mercaptans, SO2). This process comprises: (i) basification of the effluent to be treated at a pH >9 in the presence of a base of gene... | 02/25/1997 |
| 5595713 | Hydrogen peroxide for flue gas desulfurization A system for removing SO2, NO2, and other contaminants from flue gases uses hydrogen peroxide (H2 O2) as the reagent to convert the oxides of sulfur and some of the oxides of nitrogen (NO, NO2, etc.) ... | 01/21/1997 |
| 5543122 | Process for the removal of h2 S from non-condensible gas streams and from steam A process for treating non-condensible gas streams containing H2 S, and for treating steam containing H2 S, is disclosed, the process being characterized by unique division of the noncondensible stream, or of a separated non-condensi... | 08/06/1996 |
