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| Number | Title | Issue Date |
| 7311839 | Removal of biological pathogens using surfactant-modified zeolite Systems and methods are described for removing biological pathogens using surfactant-modified zeolite (SMZ). A method for removing biological pathogens from a fluid or a fluid-based gel includes filtering the fluid or fluid-based gel using SMZs. A method for removin... | 12/25/2007 |
| 7241481 | Method of removing sulfur odors from packages An article, such as a polymeric film, sachet, purge control pad, or label, includes a sulfur scavenger. In some embodiments, an oxygen scavenger is also included. A method includes providing an article, including a sulfur scavenger and an oxygen scavenger; and subje... | 07/10/2007 |
| 7122500 | Molecular sieve catalyst composition, its making and use in conversion processes The invention relates to a molecular sieve catalyst composition, to a method of making or forming the molecular sieve catalyst composition, and to a conversion process using the catalyst composition. In particular, the invention is directed to making a formulated mo... | 10/17/2006 |
| 6916431 | Precipitating chemical The invention concerns, among other things, a precipitating chemical for separating preferably hydrocarbons from water, but also for separating other dissolved and/or suspended organic and/or inorganic substances and particles in an associated liquid, including mine... | 07/12/2005 |
| 6616861 | Rapid oxygen absorption by using activators Absorbing oxygen from a closed space at a rapid rate, particularly in food packaging, is made possible by introducing an alcohol-water mixture as an activator for iron-based absorber systems, preferably including an acid to control pH. Preferred alcohols ... | 09/09/2003 |
| 6126911 | Metal oxide product suitable for use in dehydrated gas The present invention relates to the use of metal oxide particles held on carrier particles and moistened with a hygroscopic moistening agent, preferably glycol, with the moistened metal oxide particles used in a system designed to remove sulfur from dehy... | 10/03/2000 |
| 5520898 | Method for the preparation of highly reactive clay composites for the removal of sox from flue gas streams The use of base/clay composites materials as sorbents for the removal of SO2 and SO3 (SOx) from flue gas and other sulfur containing gas streams is described. The base is either an alkaline earth metal carbonate (eg. CaCO | 05/28/1996 |
| 5472633 | Process for the preparation of a stable salt-free iron chelate for use in hydrogen sulfide abatement A stable, salt-free iron chelate for use in aqueous alkaline systems is prepared by contacting iron oxide with an aqueous mixture of from 30 to 45 mole percent trisodium HEDTA and from 55 to 70 mole percent EDTA, heating the mixture to dissolve the iron, ... | 12/05/1995 |
| 5462693 | Air purifying agent and a process for producing same An air purifying agent comprising a carrier which contains short pulp fiber, on which one or more chemical components selected from the group consisting of acids, alkalis, oxidizing agents, reducing agents and antimicrobial components are supported. Accor... | 10/31/1995 |
| 5352425 | Sorbent for treatment of effluent gas stream A process for producing a sulfur sorbent composition in a mixer having a mixer paddle an energy supply is disclosed which includes hydrating an alkaline earth metal oxide in an aqueous solution containing a promoting additive selected from a group consist... | 10/04/1994 |
| 5334564 | Method for the preparation of highly reactive clay composites for the removal of SOx from flue gas streams The use of base/clay composites materials as sorbents for the removal of SO2 and SO3 (SOx) from flue gas and other sulfur containing gas streams is described. The base is either an alkaline earth metal carbonate (eg. CaCO | 08/02/1994 |
| 5320773 | Composition and method for purifying water The present invention provides a composition in dry form, preferably in the form of a tablet, containing a combination of ingredients which upon addition to contaminated water effectively removes turbidity, metal and organic contaminants in the water and ... | 06/14/1994 |
| 5308534 | Alkaline-earth based sorbent for removing effluent from a gas stream The present invention relates to an improved sorbent for use in removing effluents such as sulfur dioxide from combustion gas streams. The sorbent comprises a hydroxide formed from an alkaline-earth based material such as lime and having incorporated ther... | 05/03/1994 |
| 5282999 | Sorbent for treatment of effluent gas stream A process for producing a sulfur sorbent composition in a mixer having a mixer paddle an energy supply is disclosed which includes hydrating an alkaline earth metal oxide in an aqueous solution containing a promoting additive selected from a group consist... | 02/01/1994 |
| 5223173 | Method and composition for the removal of hydrogen sulfide from gaseous streams A method of removing hydrogen sulfide from a sour gaseous stream in a contact zone by contacting the sour gaseous stream with a H2 S selective absorbent in an aqueous alkaline solution containing a polyvalent metal chelate at a pH of about 7 to... | 06/29/1993 |
| 5149460 | Composition for H2 S removal A process for removal of H2 S from gas streams is described, the process being characterized by use of a novel iron chelate treating solution containing a specified ferric to ferrous chelate ratio, aqueous ammonia, and thiosulfate ion.... | 09/22/1992 |
| 5149459 | H2 S removal composition A process for removal of H2 S from gas streams is described, the process being characterized by use of a novel iron chelate treating solution containing a specified ferric to ferrous chelate ratio and aqueous ammonia.... | 09/22/1992 |
| 5130037 | Process for the froth flotation of oxide and salt type minerals and composition A process is provided for the froth flotation of oxide and salt type minerals utilizing as the collector a combination of a monoester of a dicarboxylic acid of the general formula ##STR1## in which R' is an aliphatic hydrocarbon group with 7-21 carbo... | 07/14/1992 |
| 5096691 | H2 S abatement with stabilized chelates in geothermal drilling H2 S abatement in geothermal drilling operations (e.g. drilling, flow testing and reworking) with a ferric aminocarboxylic acid chelating solution containing a stabilizer and an optional cationic polyelectrolyte catalyst which is injected in th... | 03/17/1992 |
| 5026503 | Composition and method for removing hydrogen sulfide from gas streams An improved aqueous catalytic oxidation-reduction composition for oxidizing hydrogen sulfide to produce elemental sulfur and a method of removing hydrogen sulfide from a gas stream whereby a gas stream containing hydrogen sulfide is brought into contact w... | 06/25/1991 |
| 4961873 | Absorbent composition containing a severely-hindered amine mixture with amine salts and/or aminoacid additives for the absorption of H2 S The present invention relates to a new alkaline absorbent solution that reduces the H2 S content in a treated gas to below 10 vppm. The absorbent solution contains two severely-hindered amines, such as bis(tertiarybutylaminoethoxy)-ethane (BTEE... | 10/09/1990 |
| 4895670 | Addition of severely-hindered aminoacids to severely-hindered amines for the absorption of H2 S A new alkaline absorbent solution containing a severely-hindered amine and a severely-hindered aminoacid is provided. A process for the removal of H2 S from fluid mixtures using this absorbent solution to produce a very low level of H2 | 01/23/1990 |
| 4894178 | Absorbent composition containing severely-hindered amine mixture for the absorption of H2 S The present invention relates to a mixture of severely-hindered amines, such as bis-(tertiarybutylaminoethoxy)-ethane (BTEE) and ethoxyethoxyethanoltertiarybutylamine (EEETB), and a one-step synthesis method for its preparation. Besides, this invention de... | 01/16/1990 |
| 4894179 | Absorbent composition containing a tertiary amino azabicyclic alcohol and an amine salt A new alkaline absorbent solution containing a tertiary amino azabicyclic alcohol in combination with its salt with a strong acid and/or in combination with a severely-hindered aminoacid is provided. A process for the removal of H2 S from fluid... | 01/16/1990 |
| 4892674 | Addition of severely-hindered amine salts and/or aminoacids to non-hindered amine solutions for the absorption of H2 S A new alkaline absorbent solution containing the additive of a severely-hindered amine salt and/or a severely-hindered aminoacid to a non-hindered amine such as N-methyldiethanolamine (MDEA) is provided. A process for the removal of H2 S from f... | 01/09/1990 |
| 4871468 | Method and composition for the removal of hydrogen sulfide and carbon dioxide from gaseous streams A method of removing hydrogen sulfide and carbon dioxide from a sour gaseous stream in a contact zone by contacting the sour gaseous stream with a lean CO2 -selective absorbent in an aqueous alkaline solution containing a polyvalent metal chela... | 10/03/1989 |
| 4774071 | Process and composition for the removal of hydrogen sulfide from gaseous streams A method of removing hydrogen sulfide from a gaseous stream in a contact zone by contacting the gaseous stream with an aqueous alkaline scrubbing solution containing a polyvalent metal chelate at a pH of about 7 to about 10 wherein the polyvalent metal ch... | 09/27/1988 |
| 4708854 | Process for the removal of NO from fluid streams using a water-soluble polymeric chelate of a polyvalent metal The present invention relates to a cyclic continuous process and compositon for the removal of NO and SO2 from a variety of fluid streams. A fluid stream containing NO and SO2 is contacted with an aqueous solutin of water-soluble org... | 11/24/1987 |
| 4683076 | Process for the removal of H2 S from geothermal steam and the conversion to sulfur using ferric chelate and cationic polymer Process for removing H2 S from the exhaust steam in a geothermal power plant wherein the H2 S containing steam is contacted with an aqueous solution containing a ferric chelate and a cationic polymeric catalyst such as poly dimethyl ... | 07/28/1987 |
| 4675169 | Process for removing sox and nox compounds from gas streams A process for removing SOx pollutants from a stack gas by (1) absorbing the SOx pollutants into an aqueous absorbent containing a formate compound and (2) regenerating the spent absorbent containing dissolved SOx compounds... | 06/23/1987 |
| 4622212 | Hydrogen sulfide removal In a cyclic hydrogen sulfide oxidation-catalyst regeneration process using an aqueous chelated polyvalent metal catalyst solution, excessive degradation of the aminopolycarboxylic acid chelating agent is prevented by incorporating in the solution an effec... | 11/11/1986 |
| 4550098 | Methods for the removal of gaseous impurities from mixed gas streams Methods are disclosed for the purification of mixed gas streams containing hydrogen sulfide, carbon dioxide, carbon monoxide, sulfur, hydrogen, and methane and other hydrocarbon gases, and mixtures thereof, by the use of an oxidizing reactive solid. In on... | 10/29/1985 |
| 4532118 | Process for removal of hydrogen sulfide from gases A process for the removal of hydrogen sulfide from a gas which comprises contacting the gas with a solution comprising ferric ions (Fe3+) and ferrous ions (Fe2+). The solution further comprises ethylenediamine tetraacetic acid (EDTA)... | 07/30/1985 |
| 4532117 | Method for reconditioning bacteria-contaminated hydrogen sulfide removal systems A method, applicable to hydrogen sulfide removal systems which employ a regenerable aqueous washing solution capable of absorbing hydrogen sulfide and converting that hydrogen sulfide to elemental sulfur, is provided for reconditioning such systems after ... | 07/30/1985 |
| 4505776 | Composition and method for treating flue gas and methanol containing effluents A composition is provided which comprises an aqueous alkaline solution of a metal salt and black liquor, the metal salt being selected from the group consisting of iron, chromium, cobalt and nickel salts. This composition is useful in a process described ... | 03/19/1985 |
| 4478803 | Dry scrubbing of SO2 from mixtures A process to remove SO2 from mixtures by contacting SO2 -containing mixtures with a regenerable iron-bearing sorbent such as paint rock under reaction conditions to produce iron sulfide and an effluent containing reduced amounts of S... | 10/23/1984 |
| 4388877 | Method and composition for combustion of fossil fuels in fluidized bed A method and composition are described for carrying out the combustion of fossil fuels in a fluidized bed with reduced emissions of sulfur, carbon and nitrogen oxides and unburned hydrocarbons. Combustion is carried out in the presence of a solid sulfur o... | 06/21/1983 |
| 4366179 | Oxygen and carbon dioxide absorbent and process for storing coffee by using the same An oxygen and carbon dioxide absorbent comprising (A) a particulate substance wherein the particles of a hydrous alkali substance are covered with separator particles, (B) iron powder and (C) an electrolyte and a process for storing coffee by using the sa... | 12/28/1982 |
| 4341745 | Process for eliminating acidic components from waste gases Acid gases are removed from waste gases by contacting said gases with an orbent which is a direct reaction product a mixture of red mud and an alkaline earth metal hydroxide or aluminum oxide.... | 07/27/1982 |
| 4252778 | Fuel gas desulfurization A method for removing sulfurous gases such as H2 S and COS from a fuel gas is disclosed wherein limestone particulates containing iron sulfide provide catalytic absorption of the H2 S and COS by the limestone. The method is effective... | 02/24/1981 |
