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5232676 |
Process for the biological purification of waste air streams
In a process for the biological elimination of halogen- and sulfur-containing gaseous pollutants from a waste air stream, the waste air stream is passed through an intermittently moistened...
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5229089 |
Recovery of flammable materials from gas streams
A process for separating methane from an oxygen-containing gas mixture which contains methane at a concentration greater than the upper explosive gas mixture limit by pressure swing adsorption...
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5226934 |
Recovery of elemental sulfur from gases
A process for the separation of elemental sulfur from a gas comprises contacting the gas with molten sulfur whereby to extract the sulfur from the gas.
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5227144 |
Process for air decontamination
Process for air decontamination consists of circulating air in a soaking chamber through several air-permeable barriers which are continuously bathed in solutions containing various chemical...
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5221522 |
Regenerative thermal oxidizer with inlet/outlet crossover duct
A regenerative thermal oxidizer for removing pollutants from industrial exhaust gas flows by high temperature oxidation is composed of at least two regenerative units having a modular construction...
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5219544 |
Method of purifying the exhaust gases from plants for the production of cement clinker
The invention relates to a method of purifying the exhaust gases from plants for the production of cement clinker, in which the filter zone through which the exhaust gases flow contains at least...
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5213778 |
Method for treating combustion exhaust gases
A method for treating the combustion gases produced by the incineration of industrial waste and the like is disclosed wherein the gases are sprayed with H 2 O to form a saturated aqueous vapor...
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5209773 |
Dual function mercury trap/particulate filter beds
A method and guardbed useful for the removal of residual amounts of mercury and entrained particulate matter from a gas such as a natural gas stream are disclosed. The guardbed contains at least...
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5209913 |
Process for the production of natural gas condensate having a reduced amount of mercury from a mercury-containing natural gas wellstream
A process for producing a natural gas condensate having a reduced amount of mercury from a mercury-containing natural gas wellstream, wherein the wellstream is separated into gaseous and liquid...
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5209912 |
Process for separating out noxious substances from gases and exhaust gases
A composition for separating out volatile pollutants from gases and exhaust gases consists of calcium hydroxide and water-soluble salts of sulfur-containing compounds, e.g., mercaptans, sulfides,...
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H001189 |
Method and apparatus for destroying certain chemical and biological warfare agents
An apparatus and method for destroying chemical and biological warfare (C agents includes heating contaminated air in a compressor, flowing the hot compressed air through a reaction vessel to...
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5207877 |
Methods for purification of air
Air polluted with potentially harmful chemical and biological matter is purified and pollutants degraded to less hazardous substances by a combined chemical and electrochemical process. Scrubber...
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5206004 |
Silane compositions and process
Improved molecular sieves and processes for treatment of molecular sieves which permit use for separation of ethylene and silane without attending formation of ethylsilane. Such treatment includes...
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5192514 |
Method of removing selenium from flue gases
A method of removing gaseous selenium from a flue gas is disclosed. The method includes injecting an effective amount of ammonia into the flue gas to produce a solid selenium reaction product. The...
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5192735 |
Preparation of low chromium active charcoal by freeze drying impregnated charcoal
Activated charcoal, or ASC whetlerite charcoal for use in providing protection against chemical warfare agents, contains chromium VI, which is a known carcinogen, as well as other metal...
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5190908 |
Racked bed for removal of residual mercury from gaseous hydrocarbons
The present invention advantageously provides a desiccant bed with means for removing residual mercury from a gas, such as a natural gas stream. The desiccant bed includes a silver and/or...
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5186916 |
Method for purifying flue-gasses
A method for purifying flue-gasses and other hot, oxidative waste gasses originating from industrial installations, combustion furnaces, engines and the like, whereby the hot gas to be purified is...
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5183646 |
Incinerator for complete oxidation of impurities in a gas stream
A device for oxidizing gaseous materials, comprising a combustion chamber, wherein the device and the combustion chamber both have a top and a bottom, the device further having a gas outlet and...
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5182089 |
Chemisorptive metal alloy and method of using the same
A chemisorptive metal alloy includes from about 30% to about 70% by weight of Ti and/or Zr and from about 30% to about 70% by weight of Cu. Optionally, the alloy may also contain from 0% to about...
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5182088 |
Removal of gaseous hydrides
A metallic oxide catalyst, containing cupric oxide and an amount of one or more of AgO, HgO or CdO effective for enhancing the ability of the catalyst for removing gaseous hydrides from a gas stream.
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5180554 |
Method of detecting the presence of moisture in a gas
A method of cleaning atmosphere gas used in manufacturing high-purity fine particles of reactive metals comprises the steps of: letting the moisture existing in the atmosphere gas condense into dew...
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5174919 |
Sulfur absorbents and process for removing sulfur from fluid streams
A novel composition comprising zinc oxide and at least one metal phosphate that can be effectively used to remove sulfur compounds from a fluid stream by contacting said fluid stream under suitable...
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5173286 |
Fixation of elemental mercury present in spent molecular sieve desiccant for disposal
A process for fixing elemental mercury (Hg°) in a spent molecular sieve desiccant is disclosed. The process includes isolating gspent molecular sieve desiccant containing elemental mercury, and...
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5173094 |
Positive-pressure filter arrangement for hazardous gases
A filtration system for removing gaseous and particulate contaminants from a contaminated structure includes a positive pressure source for raising the static pressure within the contaminated...
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5171549 |
Process for decreasing the level of impurities in zirconium chloride, titanium chloride and hafnium chloride
An improved halogenator process and system is provided which significantly and economically decreases the level of impurities in the processing of various refractory metals and their halides and...
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5169610 |
Method for the purification of rare earth oxysulfide
An efficient method is proposed for decolorizing a rare earth oxysulfide, which is usually slightly colored in grey as prepared by the sulfiding reaction of a rare earth oxide with hydrogen...
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5164168 |
Method and apparatus for purifying air
Low molecular weight hydrocarbons are removed from air by preheating the air and then passing the preheated air through a heated catalytic bed comprising a mixture of catalytic pellets and metal...
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5160713 |
Process for separating oxygen from an oxygen-containing gas by using a bi-containing mixed metal oxide membrane
Oxygen is separated from an oxygen-containing gas by introducing the gas into a first zone of a gas separation apparatus, the apparatus comprising first and second zones separated by a mixed metal...
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5160707 |
Methods of and apparatus for removing odors from process airstreams
After aerating sewage sludge in a composting process, a stream of process air is treated to remove odors therefrom by injecting into the airstream an atomized mixture of dilute sulfuric acid and...
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5156819 |
Steam scrubbing system for exhaust gases
A steam scrubber system passes an exhaust gas to be cleaned into a steam scrubber chamber having substantially saturated steam therein. The substantially saturated steam particles have strong...
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5151256 |
Coal combustion apparatus provided with a denitration
A coal combustion apparatus having prevented deterioration of a denitration catalyst due to volatile metal compounds contained in exhaust gases is provided, which apparatus comprises a combustion...
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5145651 |
System to mitigate the effect of an environmental release of a contaminant gas
A system to mitigate the effect of an environmental release of a contaminant gas. The system includes at least one first fluid effect device (13) positioned in the vicinity of the environmental...
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5141724 |
Mercury removal from gaseous hydrocarbons
Mercury is removed from a gaseous hydrocarbon stream by passing the stream through an in-line mixer which includes mixing elements which have gas-contacting surfaces of an amalgam-forming metal....
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5137701 |
Apparatus and method for eliminating unwanted materials from a gas flow line
An apparatus and method for eliminating unwanted materials, such as corrosive gases, from an effluent gas flow line includes a reactive trap wherein chemical reaction between the unwanted material,...
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5126117 |
Device for preventing accidental releases of hazardous gases
A system for containing and detoxifying a gaseous stream, comprising a storage housing containing one or more sources of toxic gas, means for applying negative pressure to the storage housing to...
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5123836 |
Method for the combustion treatment of toxic gas-containing waste gas
A method and apparatus for the combustion treatment of a toxic gas which forms microparticles by combustion are disclosed wherein the toxic gas is subjected to a combustion treatment in a specific...
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5120515 |
Simultaneous dehydration and removal of residual impurities from gaseous hydrocarbons
The present invention advantageously provides a conventional dessicant bed with means for removing residual mercury, H 2 S and CO 2 from a gas, such as a natural gas stream, by replacing an inert...
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5116591 |
Method and apparatus for combining fluids
A spray combining apparatus for use at the outlet of a fluid collection system (10) includes an outlet pipe (11) containing a diffuser and atomizer (15) adjacent an outlet opening (18). A conical...
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5114690 |
Two stage sorption of sulfur compounds
A two stage method for reducing the sulfur content of exhaust gases is disclosed. Alkali- or alkaline-earth-based sorbent is totally or partially vaporized and introduced into a sulfur-containing...
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5112585 |
Process of removing flue gas cleaning residues during the wet cleaning of flue gases by drying and construction
A process and apparatus for removing flue gas cleaning residues in a combustion system. The combustion system includes a combustion chamber; a hot gas filter located downstream from the combustion...
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5102634 |
Method for purifying exhaust gas and apparatus
A method for purifying an exhaust gas containing catalyst poison(s) by subjecting the gas to a catalytic treatment which comprises previously passing the gas through a layer packed with a highly...
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5096682 |
Trialkyl arsine removal from fluids
Trialkyl arsines (in particular trimethyl arsine) are removed from a fluid (e.g., a hydrocarbon-containing gas) by contacting the fluid with a sorbent material comprising at least one copper...
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5096681 |
Removal of trialkyl arsine from fluids
Trialkyl arsine (in particular trimethyl arsine) is removed from a fluid (e.g., a hydrocarbon-containing gas) by contacting the fluid with a sorbent material comprising vanadium pentoxide (V 2 O 5...
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5096635 |
Method of tempering carboniferous blanks in an autoclave
Cold carbon-containing blanks which are impregnated with a carbon-containing material are introduced into a cold autoclave which is thereupon sealed and filled with inert gas prior to heating of...
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5094825 |
Process for treating waste gases containing ClF.sub.3
Waste gases containing ClF 3 are treated by bringing them into contact with iron oxide substantially composed of a ferric oxide (Fe 2 O 3 ) at a linear velocity of about 10-200 cm/min at ordinary...
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5094830 |
Process for removal of water and silicon mu-oxides from chlorosilanes
A scavenger composition having utility for removal of water and silicon mu-oxide impurities from chlorosilanes, such scavenger composition comprising: (a) a support; and (b) associated with...
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5085844 |
Sorption of trialkyl arsines
Trialkyl arsine (in particular trimethyl arsine) is removed from a fluid (e.g., a hydrocarbon-containing gas) by contacting the fluid with a sorbent material comprising (a) elemental sulfur, and...
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5085839 |
Apparatus for the prevention of acid gas excursions
An improved acid gas recovery system is provided which has particular application in reducing the incidence of sulfide and other acid gas excursions. The present invention addresses the...
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5080875 |
Process and apparatus for the purification of hydrogen gas
A process for the purification of contaminated hydrogen gas which involves, first, subjecting the hydrogen gas to a preliminary purification with a hydride-forming material which has a low hydrogen...
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5064626 |
Trialkyl arsine sorbents
Trialkyl arsine (in particular trimethyl arsine) is removed from a fluid (e.g. a hydrocarbon-containing gas) by contacting the fluid with a sorbent material comprising (a) a transition metal...
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