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4606830 |
Treatment of effluent liquors
Aqueous effluent liquors such as those derived from the ash-slagging of coal are treated to remove halide, e.g. chloride ions by heating the liquor to 400° C. to 500° C. and contacting the vapor...
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4597876 |
Regasifying pasteurization system
Disclosed is a regasifying pasteurization system and related methods using compressional waves. The system first degasifies the incoming liquid acoustically and under a static pressure below...
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4597877 |
Process and equipment for water treatment
When treating water with ozone, chlorine or similar reagents, the problem arises of introducing the gas as inexpensively as possible at the extraction point which is frequently located in a...
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4591444 |
Process for exhaustively decontaminating perfluoropolyethereal oils
A process for fully removing from the perfluoropolyethers having a minimum vapor tension, the organic polluting matters containing group --OH and/or bonds ##STR1## consisting in treating the...
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4574071 |
Process for removing dissolved oxygen from water using hydrazine
A process for removing dissolved oxygen from an aqueous medium, using hydrazine to react with the oxygen, where the aqueous medium is contacted with a catalyst bed of palladium or platinum metal...
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4565634 |
Method for the removal of oxygen from water
Water intended for injection into an oil reservoir is freed from oxygen by gravitating the water through a vacuum tower. Gases liberated from the water by the vacuum process are drawn off at the...
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4559210 |
Multi-stage method for washing-out ammonia from gas, particularly coking oven gas
In a multi-stage washing process for the removal of ammonia from coking oven gas, a portion of waste water, produced during the separation of ammonia from ammonia-containing water in an ammonia...
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4557835 |
Process for removal of dissolved oxygen from steam generation systems
An improved process for removing oxygen from an aqueous medium used in a steam generating system, the aqueous medium having hydrazine added thereto, wherein hydrazine-containing aqueous medium...
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4549968 |
Method of utilizing improved stability oxygen scavenger compositions
Stable oxygen scavenger compositions adapted for storage without resulting in substantial sludge formation and oxygen scavenging methods of using the compositions are disclosed. The compositions...
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4540494 |
Method for the removal of oxygen dissolved in water
A method for removal of oxygen dissolved in water, especially from reservoir drinking water, and for preservation purposes based on hydrazine, having no organic activators and assuring a high...
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4522730 |
Process for the treatment of an aqueous condensate
A condensate which contains cyanide ions, hydrogen sulfide and ammonia is first partly purified by stripping with water vapor and stripped-off gases are then scrubbed with an absorbent. The laden...
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4495031 |
Treatment of gas condensates
The invention makes possible a coking operation largely or completely eliminating waste water by converting the gas condensates obtained from the coking plant by a reverse osmosis process into a...
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4487745 |
Oximes as oxygen scavengers
The removal of dissolved oxygen from aqueous systems, such as steam generating systems, thereby inhibiting the corrosion of metal surfaces by adding to the system a composition in which the...
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4483695 |
Apparatus for vibration separation of oil and water
An elongated casing is provided and is closed at one end. A fluid pressure actuated elongated internal vibrator of the type including an internal fluid pressure driven eccentric weight orbital...
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4479917 |
Use of aminoguanidine compounds as oxygen-scavenging and corrosion-inhibiting agents
An oxygen-scavenging and corrosion-inhibiting agent for fluidic systems comprising an aminoguanidine compound selected from the formula: ##STR1## or a salt thereof, wherein R is selected from H or...
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4464228 |
Energy conservation within the Kellogg ammonia process
A method of stripping volatile contaminants from ammonia plant process condensate and recovering a stripped process condensate and using same as a high quality makeup water for operating units...
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4456535 |
Process for the removal of urea, ammonia, and carbon dioxide from dilute aqueous solutions
An improved process for the removal of urea, ammonia, and carbon dioxide from dilute aqueous solutions thereof by hydrolyzing the urea, and thereafter desorbing ammonia and carbon dioxide. The...
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4454046 |
Boiler scale prevention employing an organic chelant
An improved method of treating boiler water which employs an oxygen scavenging compound and a compound to control pH together with a chelating agent, wherein the chelating agent is...
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4447333 |
Process for the elimination of ammonia in coke plant waste waters
A process for the elimination of ammonia in waste waters from a coke oven battery wherein ammonia-containing waste water or ammonia-containing vapor obtained by means of ammonia separation from the...
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4428842 |
Well reserve pit liquor treatment process
A system and process for treating oil well discharge pit liquors mixes successive portions of the watery layer of such liquors with surface active agents and sprays the resultant mixture in the air...
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4419327 |
Method of scavenging dissolved oxygen in steam generating equipment using ammonia or amine neutralized erythorbic acid
A method of scavenging oxygen and passivating metal surfaces in steam generating equipment by treating feedwater with an ammonia or amine neutralized erythorbate form thereof.
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4410432 |
Process for removing hydrogen sulfide from fluids
A process is disclosed for removing hydrogen sulfide from fluid, particularly geothermal steam. Carbonic acid is sprayed into a condenser to inhibit dissolution of hydrogen sulfide into the...
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4406813 |
Disoxidant and process for preparing same
A process for preparing a disoxidant, comprising: providing fine powder of a porous filler f-1, such as zeolite, having a particle size not greater than 100 mesh and coarse powder of a porous...
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4405465 |
Process for the removal of chlorate and hypochlorite from spent alkali metal chloride brines
A process is described for reducing the concentration of oxyhalogen impurities in an alkali metal halide brine recovered from an electrolytic cell which comprises circulating the alkali metal...
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4399098 |
Prevention of corrosion in aqueous solutions
A method for treating water to retard corrosion due to dissolved oxygen, especially boiler feed waters and boiler water condensates, is disclosed. Semicarbazide and its salts are highly effective...
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4396463 |
Method of purifying waste water
A method of purifying waste water, for example waste water from a coking plant, comprises supplying waste water to be purified to the upper part of a stripping column comprising a plurality of...
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4389327 |
Use of selected 1,2-dihydro-1,2,4,5-tetrazines as oxygen-scavenging agents
Disclosed is a method for removing dissolved oxygen from a liquid (e.g., aqueous) system which comprises adding to said liquid system an effective amount of an oxygen-scavenging chemical...
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4363734 |
1,3-Dihydroxy acetone as an oxygen scavenger for water
An improved method for scavenging dissolved oxygen from alkaline waters which comprises using dihydroxy acetone catalyzed with at least 1 percent based on the weight of said dihydroxy acetone, of a...
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4340489 |
Wastewater treatment process with pH adjustment
Wastewater is continuously disinfected by combining the wastewater with sufficient acid to reduce the pH of the wastewater to less than about 4 and with sufficient SO 2 that the wastewater has a...
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4311597 |
Method and apparatus for treatment of wastewater
A method of removing ammonia from a wastewater containing free and fixed ammonia said process comprising the steps of: distilling the wastewater to remove the free ammonia; treating the distilled...
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4306978 |
Method for lime stabilization of wastewater treatment plant sludges
A method for the lime stabilization of wastewater sludge, includes the steps of dewatering sludge so as to produce a sludge cake containing from about 10 to 60% by weight of dry solids and rapidly...
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4295972 |
Method for treating water containing wastes
A method for treating a water containing waste such as industrial sludges and animal excrements. The method comprises a first step of mixing the waste with an alkaline earth metal oxide such as...
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4278546 |
Treatment of a liquid by circulation and gas contacting
Process and apparatus for treating waste water by circulating it, together with oxygen-containing gas, through communicating downflow and upflow pipes enclosed in a treatment chamber, the pipes...
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4278635 |
Method for deoxygenation of water
A method for boiler water treatment to retard corrosion due to dissolved oxygen. Hydroquinone and certain related compounds are highly effective oxygen scavengers for use in boiler water and...
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4269717 |
Boiler additives for oxygen scavenging
A method of removing dissolved oxygen from boiler water which comprises adding to the water an oxygen scavenging amount of carbohydrazide.
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4167973 |
Process for chemical decontamination of layers of earth and/or water contaminated with organic materials
There is provided an apparatus for the chemical decontamination of layers of earth and/or water contaminated with organic materials comprising the following block units: Device for withdrawal of...
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4160725 |
Waste water purification processes
Waste water from coke ovens is purified by passing the waste water and a stripping fluid through a stripping column in counterflow. Non-volatile ammonium compounds are removed in one region of the...
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4153556 |
Method and apparatus for conditioning demineralized water
The invention relates to a simple, very economical apparatus for conditioning "aggressive" demineralized brackish water or sea water to remove CO 2 and raise the pH to about 8. The invention is...
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4138330 |
Liquid treatment
Apparatus and method for dissolving gas in a body of liquid comprising a gas/liquid contactor device having a plurality of discrete conduit sections of different cross-sectional area connected in...
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4129502 |
Liquid treatment process
Process for treating liquid. The liquid is contained in a vessel. A stream of liquid is passed under pressure through a line. Gas is introduced into the stream and downstream of the gas...
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4002565 |
Waste-water process
Waste water containing dissolved acid-gas and ammonia impurities is processed for the separate recovery of the acid gas, ammonia and recycle water. In a further aspect, a purified pyrolysis gas is...
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3990971 |
Metal cyanide complex compound disposal
Foul water streams from refining processes such as fluidized catalytic cracking, containing about 1-100 ppm metal cyanide complex compounds, are contacted with flue gas from combustion of...
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3970739 |
Process for concurrently treating process waste waters and flue gases from ammonia synthesis process plants
The process involves stripping ammonium nitrogens and organic materials, as gases, which are present in process waste waters to be discharged from plants wherein gases for use in ammonia synthesis...
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3962113 |
Method for accelerating oxygen removal employing an aqueous solution of an alkyl hydrazine
The rapid removal of dissolved oxygen from aqueous solutions is accomplished by treating the solution with an effective proportion of a liquid organic hydrazine compound. The method of this...
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3945919 |
Process for the environmentally favorable destruction of solid and/or liquid cyanide waste
Solid and/or liquid cyanide waste is destroyed under environmentally favorable conditions by adding water to the cyanide and heating the mixture at high temperature and with the use of pressure.
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3913673 |
Oil recovery process which provides for the treatment of produced water before it is reinjected to drive oil toward the production wells
A process for the recovery of oil from subterranean formations in which water is injected into the formation via an injection well and a mixture of oil and water contaminated with hydrogen sulfide...
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3867287 |
PROCESS RM FOR PURIFYING INDUSTRIAL WASTE WATERS CONTAINING DIISOPROPYL AMINE
Diisopropyl amine contained in waste water can be removed by contacting the waste water in finely divided form with a air stream to produce a waste water stream containing a lesser amount of...
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3856673 |
PURIFICATION OF SPENT SULFURIC ACID
A process for purifying a spent acid stream containing organic impurities and at least 60 percent by weight of sulfuric acid comprises admixing the stream with ozone, hydrogen peroxide,...
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3764548 |
OXYGEN SCAVENGER AND USE THEREOF
An oxygen scavenger composition characterized by (1) a catalyst comprising an anthraquinone disulfonic acid or salt thereof and a vanadate salt such as sodium vanadate and (2) a reducing agent such...
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3461041 |
VAPOR COMPRESSION DISTILLATION OF CHEMICALLY TREATED DEGASSED SALINE WATER
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