Patents in Class 252/191

Matches 1 - 42 out of 42

Match	Document	Document Title
1	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,...
2	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...
3	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 SO 2 and SO 3 (SO x ) from flue gas and other sulfur containing gas streams is described. The base is either an alkaline...
4	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...
5	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,...
6	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...
7	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...
8	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...
9	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 H 2 S selective absorbent in an aqueous alkaline solution containing...
10	5149459	H.sub.2 S removal composition A process for removal of H 2 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...
11	5149460	Composition for H.sub.2 S removal A process for removal of H 2 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...
12	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...
13	5096691	H.sub.2 S abatement with stabilized chelates in geothermal drilling H 2 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...
14	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...
15	4961873	Absorbent composition containing a severely-hindered amine mixture with amine salts and/or aminoacid additives for the absorption of H.sub.2 S The present invention relates to a new alkaline absorbent solution that reduces the H 2 S content in a treated gas to below 10 vppm. The absorbent solution contains two severely-hindered amines,...
16	4895670	Addition of severely-hindered aminoacids to severely-hindered amines for the absorption of H.sub.2 S A new alkaline absorbent solution containing a severely-hindered amine and a severely-hindered aminoacid is provided. A process for the removal of H 2 S from fluid mixtures using this absorbent...
17	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...
18	4892674	Addition of severely-hindered amine salts and/or aminoacids to non-hindered amine solutions for the absorption of H.sub.2 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...
19	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...
20	4683076	Process for the removal of H.sub.2 S from geothermal steam and the conversion to sulfur using ferric chelate and cationic polymer Process for removing H 2 S from the exhaust steam in a geothermal power plant wherein the H 2 S containing steam is contacted with an aqueous solution containing a ferric chelate and a cationic...
21	4675169	Process for removing sox and nox compounds from gas streams A process for removing SO x pollutants from a stack gas by (1) absorbing the SO x pollutants into an aqueous absorbent containing a formate compound and (2) regenerating the spent absorbent...
22	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...
23	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...
24	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...
25	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 (Fe 3 +) and ferrous ions (Fe 2 +). The solution further comprises...
26	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...
27	4478803	Dry scrubbing of SO.sub.2 from mixtures A process to remove SO 2 from mixtures by contacting SO 2 -containing mixtures with a regenerable iron-bearing sorbent such as paint rock under reaction conditions to produce iron sulfide and an...
28	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....
29	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...
30	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.
31	4252778	Fuel gas desulfurization A method for removing sulfurous gases such as H 2 S and COS from a fuel gas is disclosed wherein limestone particulates containing iron sulfide provide catalytic absorption of the H 2 S and COS...
32	4238463	Method for desulfurizing gases with iron oxide Removal of hydrogen sulfide from gases using iron oxide-containing solids is improved by introducing a liquid containing a primary or secondary amine into the iron oxide-containing solids.
33	4207201	Process for the manufacture of an aqueous iron (III)-chloride-sulfate solution The application is concerned with a process for the manufacture of an aqueous iron (III)-chloride-sulfate solution by the oxidation of iron (II) sulfate with chlorine in aqueous solution.
34	4201751	Gas purification Pulverent solid sorption agent is injected into and, optionally, admixed with a stream of noxious-contaminant-containing gas and then separated from such gas. The solid sorption agent comprises an...
35	4166807	Oxygen absorbent An oxygen absorbent comprising iron and a metal halide, characterized in that the iron contains sulfur in an amount of from 0.05% to 5% on the basis of the weight of the iron is disclosed.
36	4157988	Method and composition for removing sulfur dioxide from flue gases In a "first" scrubbing operation, the sulfur dioxide containing flue gas is scrubbed with an aqueous solution containing ferric sulfate and aluminum sulfate. The ferric sulfate oxidizes the sulfur...
37	4089809	Regenerable sorbent and method for removing hydrogen sulfide from hot gaseous mixtures Hydrogen sulfide is effectively removed from hot gaseous mixtures useful for industrial purposes by employing a solid absorbent consisting of silica-supported iron oxide in pellet form.
38	4061716	Process for the production of sorbent solids for use in the desulfurization of gases This disclosure describes a process for the preparation of iron-bearing and calcium-bearing sorbent solids for use in the desulfurization of gases. The process involves mechanical procedures for...
39	4008169	Preparation of iron oxide sorbent for sulfur oxides A highly sorbent iron oxide for use in the purification of dilute sulfur and oxygen-bearing gases is prepared by a two step process which involves a low temperature decomposition of iron sulfate...
40	3492083	PROCESS FOR THE REMOVAL OF SULPHUR FROM INDUSTRIAL GASES AND TO APPARATUS FOR USE IN SUCH A PROCESS
41	3491086	METAL-POLYSACCHARIDE COMPOSITION AND ITS PREPARATION AND USE
42	3199946	Removal of hydrogen sulfide from hydrocarbon fuel gases

Matches 1 - 42 out of 42