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5419834 |
Precipitating agent for the precipitation of heavy metals
A precipitating agent containing thioacetamide is described for the precipitating of heavy metals from flue gases and waste waters, it containing thioacetamide (C 2 H 5 SN) in a 1-20% aqueous...
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5417946 |
Process for removing total reduced sulfur compounds from gaseous stream
A process for removing Total Reduced Sulfur compounds from a gaseous stream such as those containing natural gas, industrial gas, and digester gas by oxidation with a fine flocculent acidic...
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5417934 |
Dry exhaust gas conditioning
A gas treatment method and apparatus for use in connection with processes of etching semiconductor devices or of plasma enhanced chemical vapor deposition onto semiconductor materials. In...
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5415684 |
Fluidized bed scrubber for use in gas cleaning system
A fluidized bed scrubber for use in gas cleaning systems, comprising means for introducing a quantity of polluted gas into a first chamber; means for removing a portion of the pollutants from the...
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5413627 |
Process for the selective removal of inorganic and/or organic sulfur compounds
For the selective removal of sulfur from gases, a physical scrubbing agent is used, comprising a heterocycle having five or more ring atoms, which contains two heteroatoms, one of which is nitrogen...
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5411720 |
Method and device for the separation and conveyance of gases and/or of gas molecule fragments generated by dissociation on surfaces by surface diffusion
A solid body having extremely narrow passages formed therein for the separation and conveyance of gases by surface diffusion. Because of the relatively high flow resistance resulting from the...
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5409522 |
Mercury removal apparatus and method
The present invention discloses an apparatus and process for removing particulate material and mercury-containing compounds from a gas stream. The apparatus includes a particulate removal means to...
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5405590 |
Off-gas scrubber system
An off-gas quencher and solid recovery scrubber unit includes a wet flue gas scrubber which has the dual responsibilities of lowering the temperature of the inlet hot gas entering through the...
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5405445 |
Vacuum extraction system for chemical vapor deposition reactor vessel and trapping device incorporated therein
A vacuum extraction system is connected to a reactor vessel in which a chemical vapor deposition (CVD) process is carried out by using a suitable starting gas. The system comprises a pump for...
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5405812 |
Method and arrangement for purifying a carbon-containing adsorption medium
In a method for purifying a carbon-containing adsorption medium used for treating flue gases within a flue gas scrubbing process the adsorption medium is introduced into an adsorption medium...
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5403365 |
Process for low mercury coal
A process for producing low mercury coal during precombustion procedures by releasing mercury through discriminating mild heating that minimizes other burdensome constituents. Said mercury is...
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5387406 |
Method and device for the adsorption and chemisorption, respectively, of gaseous components in a gas stream
A method and a device are provided for the adsorption and chemisorption, respectively, of gaseous components out of a gas stream. The dust return is achieved within a fabric filter. A combination...
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5385689 |
Process and composition for purifying semiconductor process gases to remove Lewis acid and oxidant impurities therefrom
Scavenger compositions useful for purifying process gas streams, such as process gas streams, such as hydrogen, nitrogen, noble gases, diborane, and hydride gases from Groups IVA-VIA of the...
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5382417 |
Process for removal of selected component gases from multi-component gas streams
A method of purifying multi-component gas streams, comprising the steps of stabilizing an absorbent solution which comprises a Group I-B metal halide amine, contacting said absorbent solution with...
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5378439 |
Process for removing gaseous hydrides from a solid support comprising metallic oxides
The invention concerns a process for removing gaseous hydrides from a solid support of metallic oxides, which consists in causing a gas flow to circulate, at room temperature, on a solid support...
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5378440 |
Method for separation of substances
Methods for separation of substances are provided. The methods include contacting a mixture of at least two components in flowable conditions with mesoporous, crystalline materials termed M41S...
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5376354 |
Process for disposal of waste by combustion with oxygen
A process for the disposal of refuse is characterized by combustion of combustible, solid, pasty or liquid waste materials in a combustion plant with a combustion gas containing at least 50%...
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5370847 |
Method and multi-ejector type of system for purifying the polluted poisonous exhaust gas
A method and A multi-ejector type of system for efficiently purifying the polluted poisonous exhaust gas, which is inevitably generated from the progress of work of the manufactories of various...
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5366708 |
Process for catalytic reaction of gases
Apparatus and process for the catalytic gaseous phase reaction of a feed gas mixture. The apparatus includes a reactor having two ends which alternately serve as an inlet for the feed gas mixture...
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5366719 |
Method of performing a chemical reaction and a reactor for use therewith
This invention relates to a method of conducting a chemical reaction in the presence of a heterogeneous catalyst, in which a feedstock is passed through a catalytic reactor, said reactor comprising...
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5364439 |
Method to treat geothermal fluid streams
An integrated system of non-condensable gas (NCG) and condensate treatment allows geothermal power plant condensate and non-condensable gas effluent streams containing H 2 S and ammonia to be...
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5364604 |
Solute gas-absorbing procedure
A solute gas absorbing procedure employs a parallel flow of liquid absorbing medium to dual-fluid spray nozzles from which are formed fine droplet sprays in which the solute gas is absorbed. The...
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5354357 |
Removal of mercury from process streams
Mercury is often removed as an impurity from process fluid streams by adsorption in fixed beds using any of several well-known adsorbents having the ability to selectively adsorb mercury. It is...
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5352420 |
Process for the purification of waste gas having a high chloride content
A process, for purification of a combustion flue gas from a garbage incineration plant having a chloride content and further contaminated with HF, SO 2 , NO x and heavy metals, and for recovery of...
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5350728 |
Method of preparing a solid mass for mercury recovery
A solid mass for the recovery of mercury, comprising a solid mineral support or dispersant, essentially copper and sulphur at least partly in the form of copper sulfide is produced by the following...
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5346679 |
Method for reduction of carbon dioxide, catalyst for the reduction, and method for production of the catalyst
A catalyst for the reduction of carbon dioxide into carbon monoxide includes tungsten sulfide alone or at least one catalyst support selected from among alumina, silica, activated carbon, zeolite,...
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5346674 |
Process and apparatus for removal of impurities from flue gases
A process and apparatus is disclosed for removing impurities from gases such as flue gases. A liquified gas such as nitrogen is introduced into direct contact with the gases to be cleaned of...
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5344631 |
Process for the separation of undesirable constituents from a waste gas
Process for adsorbing undesirable constituents from a waste gas by feeding the waste gas through at least one reaction chamber filled with lumpy or granular adsorbent, and through at least one...
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5340552 |
Reactive matrix for removing impurities from hydride and inert gases and process
A macroreticulate polymer is provided for removing water vapor and oxidants from a gas having the formula: ##STR1## wherein Ar is a heteroaromatic moiety, M is bonded to the heteroaromatic moiety...
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5338521 |
Process for reversibly absorbing acid gases from gaseous mixtures
A process is disclosed for reversibly absorbing acid gases from gaseous mixtures wherein a salt hydrate is heated to a temperature above its melting point and exposed to an acid gas which is...
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5332562 |
Method for removing particulate matter and gases from a polluted gas stream
The steps of the method of the invention are preferably practice on apparatus consisting of components arranged in a closed system for removing particulate matter and gases from a polluted gas...
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5328671 |
Heat and mass transfer
In a chemisorption reaction process wherein a polar gas is repeatedly alternately adsorbed and desorbed on a complex compound formed by adsorbing said polar gas on a metal salt, said complex...
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5322628 |
Method for simultaneously drying and removing metallic and organic mercury from fluids
An adsorption system, such as a composite drier-bed, having at least two distinct adsorption regions for simultaneously drying and removing metallic/inorganic and organic forms of mercury from a...
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5320817 |
Process for sorption of hazardous waste products from exhaust gas streams
A method for cleaning an exhaust gas containing ammonia and at least one silicon-containing compound selected from the group consisting of silane and chlorosilanes, which comprises contacting the...
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5312607 |
Process for the sorption of residual gas by means by a non-evaporated barium getter alloy
The process of the present invention provides for the sorption of residual gas in a vessel by means of a non-activated, non-evaporated barium getter. It comprises the steps of reducing an alloy of...
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5312605 |
Method for simultaneously removing SO.sub.2 and NO.sub.X pollutants from exhaust of a combustion system
A method is disclosed for removing pollutants from the exhaust of combustion systems burning fuels containing substantial amounts of sulfur and nitrogen. An exemplary method of the invention...
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5312606 |
Process for the sorption of residual gas by means of a non-evaporated barium getter alloy
The process of the present invention provides for the sorption of unwanted gas in a vessel by means of a non-evaporated barium getter. It comprises the steps of reducing an alloy of Ba 1 -x A x Li...
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5310334 |
Method and apparatus for thermal destruction of waste
An apparatus for removing contaminates from industrial waste streams by thermal destruction in which contaminated waste emission gases are controllably intermixed with hydroxy gas and the mixture...
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5306475 |
Reactive calcium hydroxides
An enhanced calcium hydroxide, a process for its manufacture and a process for its use in the removal of volatile heavy metals from a gas is disclosed.
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5304693 |
Process for eliminating mercury from steam cracking installations
A process for the elimination of mercury from an overall steam cracking installation, characterized in that regeneration is terminated by the injection of regeneration gas onto an active...
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5298229 |
Purification of sulfur hexafluoride
Impurities such as oxygen and moisture can be removed from sulfur hexafluoride by contacting the impure gas with the reaction product of sulfur hexafluoride and a lithium-substituted...
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5294422 |
Process for purification of rare gas
Highly purified rare gas (helium, neon, argon, krypton, xenon, etc.) is obtained by removing impurities contained therein, such as nitrogen, hydrocarbon, carbon monoxide, carbon dioxide, oxygen,...
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5292360 |
5A zeolite/kaolinite adsorbent for gas purification
Adsorbent material well adapted for the purification of gases (notably by the PSA and TSA methods) by adsorbing impurities therefrom that are more polar or polarizable than the gases to be...
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5281402 |
Cost reduction of wet FGD system with a tray
A method of saturating and humidifying the incoming flue gas of a flue gas desulfurization process without the need for underspray headers or the like. Initial humidification occurs by passing the...
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5281259 |
Removal and recovery of mercury from fluid streams
In the purification of natural gas streams to remove mercury by adsorption procedures, environmental pollution is avoided by using a condenser in conjunction with the adsorption beds in a manner...
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5281258 |
Removal of mercury impurity from natural gas
In processes for removing mercury vapor from natural gas streams by selective adsorption in fixed adsorbent beds, water is invariably adsorbed along with the mercury impurity. During the periodic...
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5277056 |
Process and apparatus for continuously monitoring waste gas from an incinerator plant
Process for the continuous monitoring of waste gas from an incinerator plant, which contains volatile mercury halides and optionally metallic mercury in the form of vapor, with respect to the...
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5271908 |
Pyrophoric gas neutralization chamber
A pyrophoric gas neutralization chamber is disclosed. The chamber can be used to neutralize a stream of spent process gas from, for example, a chemical vapor deposition process containing, for...
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5268152 |
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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5248488 |
Natural gas treating system
A method for removing mercury from natural gas comprises addition of a sulfur-containing agent to form sulfides of mercury, addition of organic base to absorb hydrogen sulfide, and subsequent...
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