|
Match
|
Document |
Document Title |
|
|
5120451 |
Process for reducing the cyanide content of a solution
A process for treatment of waste aqueous process streams from industrial process containing both cyanide ions and dissolved ammonia to reduce the cyanide content, comprising the consecutive steps:...
|
|
|
5118447 |
Thermochemical nitrate destruction
A method is disclosed for denitrification of nitrates and nitrates present in aqueous waste streams. The method comprises the steps of (1) identifying the concentration nitrates and nitrites...
|
|
|
5108655 |
Foam monitoring control system
This invention relates to a system for monitoring and controlling foam in a liquid tank utilizing a foam level sensing device positioned at a downstream location from a defoaming agent delivery...
|
|
|
5108624 |
Method for deoxygenating a liquid
A method is provide for deoxygenating water that is at substantially ambient temperature and contains dissolved oxygen. A selected reducing agent is injected into a stream of the water, and the...
|
|
|
5104554 |
Removing radon by downhole sparging of air
Substantially the last traces of radon are removed from typical well water at subterranean temperatures prior to significant pressurization of the water by displacement of the radon by a stream of...
|
|
|
5096599 |
Process for purifying the effluent from urea production plants
A process for purifying the effluent originating from urea production plants, consisting of three successive treatment stages, namely stripping of the volatile components, thermal hydrolyis of the...
|
|
|
5094814 |
All-volatile multi-functional oxygen and carbon dioxide corrosion control treatment for steam systems
A combination product containing (a) dihydroxyacetone, (b) hydroquinone, and (c) a volatile amine that is capable of removing oxygen and neutralizing carbon dioxide in industrial waters,...
|
|
|
5085782 |
Process for controlling the pH of a brine
In the processing of a geothermal brine and the recovery of heat therefrom, there are produced a non-condensable gas stream containing hydrogen sulfide and carbon dioxide and a liquid stream...
|
|
|
5082573 |
Method for detoxifying ammonia and chloramine in aquatic environments
A method for detoxifying ammonia in an ammonia-containing aquatic system comprises adding to the system a novel composition comprising an amine-based ammonia detoxifying solution in an amount...
|
|
|
5053140 |
Process and apparatus for removing impurities from water used in food processing utilizing a mixture of ozone and air
An apparatus and a process for using the apparatus for removing fat, bacteria, solids and other impurities from water used in food processing so that substantially all the water may be reused...
|
|
|
5043074 |
Device and method for measuring the ultrafiltration in an artificial kidney
The invention includes a device for measuring a quantity of liquid extracted from a dialysis liquid circuit, the device having a reservoir means connected to the dialysis liquid circuit for...
|
|
|
5039429 |
Hypochlorite removal from waste stream effluents
This invention relates to the removal of hypochlorite groups from aqueous effluent solutions, so as to permit the disposal of the effluent by deep well injection. More particularly this invention...
|
|
|
5035810 |
Process for treating wastewater which contains sour gases
For the treatment of a wastewater containing sour gases with a stripping gas, resultant stripping gas containing the sour gases is introduced into at least one combustion stage within the total...
|
|
|
5035813 |
Process and composition for treating underground formations penetrated by a well borehole
An aqueous fluid for treating underground, carbon dioxide-containing formations penetrated by casing regions of a wellbore, prior to the cementing of casings into the wellbore, comprises: (i)...
|
|
|
4997572 |
High rate method for alkaline stabilization, beneficiating and pelletizing of wastewater treatment plant sludges
The present invention relates to a high rate method for combining waste materials to produce valuable products for agricultural, horticultural, sylvicultural or public use. Specifically, the...
|
|
|
4980128 |
Control of corrosion in aqueous systems
Corrosion of metals in contact with system water in an aqueous system is inhibited by adding to the system water an effective amount of an oxygen scavenger selected from the group of nitrones...
|
|
|
4968438 |
Gallic acid as an oxygen scavenger
An improved method for scavenging dissolved oxygen from waters used to generate steam which comprises treating said waters with at least 0.3 mole of gallic acid per mole of oxygen contained in said...
|
|
|
4968436 |
Method for the treatment of sewage containing nitrites
In a method for the treatment of sewage containing nitrites comprising the reduction of the nitrite with urea in an acid medium it is provided, to obtain end products friendly to the environment...
|
|
|
4960576 |
H.sub.2 S abatement in geothermal steam during stacking operations
A process for abating hydrogen sulfide during geothermal steam stacking operations is disclosed. The geothermal steam to be stacked is introduced into a geothermal steam stacking line. Ferric...
|
|
|
4937004 |
Method and apparatus for deoxidation of chlorinated water
The method for the deoxidation of chlorinated water, more particularly sea water, by means of a low oxygen content stripping gas, comprises a closed circuit in which a liquid absorbent circulates....
|
|
|
4929364 |
Amine/gallic acid blends as oxygen scavengers
An aqueous concentrate useful for treating boiler waters to scavenge oxygen therefrom which contains at least 0.3% by weight of either gallic acid or propyl gallate. This aqueous concentrate has a...
|
|
|
4895703 |
Trihydroxybenzene boiler corrosion inhibitor compositions and method
A method for inhibiting corrosion due to dissolved oxygen wherein trihydroxybenzene compounds, alone or in combination with conventional oxygen scavengers, preferably hydroquinone, are added to...
|
|
|
4892664 |
Decontamination of sites where organic compound contaminants endanger the water supply
A method and system for decontaminating water, e.g., groundwater or process effluent, which is contaminated by small concentrations, e.g., in the range of 0.01 to 100 ppm, of dissolved volatile...
|
|
|
4891141 |
Oxygen scavenger for boiler water and method of use
An oxygen scavenger for boiler water includes ascorbic acid neutralized with diethylaminoethanol. The diethylaminoethanol provides condensate treatment for the long and short steam lines and...
|
|
|
4874530 |
Method for treating photographic processing waste solution
Disclosed is a method for treating a photographic processing waste solution comprising concentrating the photographic processing waste solution containing at least thiosulfate ions, characterized...
|
|
|
4869832 |
Radon removal method
A radon removal system includes a packed mass transfer material aeration column and is sized to fit within a single story of a residential building. A residential water supply that is naturally...
|
|
|
4853002 |
Process for removing hydrogen sulfide from waste water
Hydrogen sulfide is removed form a water stream comprising hydrogen sulfide and a high concentration of a Group IIA metal component such as magnesium and calcium components by maintaining the water...
|
|
|
4851130 |
Oxygen removal with carbon catalyzed erythorbate or ascorbate
When an aqueous system containing dissolved oxygen and erythorbate or ascorbate is passed through an activated carbon bed, the oxygen is removed at ambient temperatures. This method of oxygen...
|
|
|
4839052 |
Biological treatment of water
The invention provides a process for the treatment of water containing dissolved calcium ions and dissolved sulphate ions. The water is passed at a pH of 5-8,5 through an anaerobic biological...
|
|
|
4816177 |
Treating agent for liquid media
An agent is disclosed that is useful for treating liquid media, e.g., dechlorinating aqueous media. The agent contains at least one salt from the sulfur oxide family, such as sodium sulfite. In the...
|
|
|
4795532 |
Aftertreatment method and apparatus for distilled water
A method and apparatus for treating the distilled water obtained from an evaporation process sea water desalination plant is provided wherein carbon dioxide is extracted from sea water in the high...
|
|
|
4789488 |
Catalyzed oxygen removal with hydrogen for steam generator systems
Water for use in steam generation systems, which is contained in a storage tank, is deoxygenated for use in the system by adding hydrogen to a stream of the water and intimately mixing the same,...
|
|
|
4784775 |
Removal of hydrogen sulfide from sour water
Sour water is treated to remove dissolved hydrogen sulfide by means of an aqueous chelated polyvalent metal solution in a continuous recirculating system, particularly an autocirculation system,...
|
|
|
4756836 |
Downhole hydrogen sulfide scavenging in drilling mud using iron chelates
For drilling mud during use in drilling a well an additive of FE Chelate is disclosed. The chelating agent preferably includes EDTA, HEDTA, NTA, or DTPA. It is oxygen regenerated at the surface to...
|
|
|
4752400 |
Separation of metallic and cyanide ions from electroplating solutions
A method of removal of cyanide and metal ions from electroplating waste waters is described. The cyanide, as hydrogen cyanide, is purged with air and then absorbed efficiently in 1.5% sodium...
|
|
|
4734258 |
Morpholinohexose reductone as an oxygen scavenger
An improved method for scavenging dissolved oxygen from industrial waters which comprises treating said waters with at least 1 ppb of morpholinohexose reductone.
|
|
|
4728497 |
Use of aminophenol compounds as oxygen scavengers in an aqueous medium
A method for reducing the amount of oxygen in an oxygen-containing aqueous medium comprising adding to the medium an effective amount of a hydrazine-free aqueous solution of an aminophenol compound...
|
|
|
4722799 |
Natural gas desulphurizing apparatus and method
A desulphurization apparatus and method for natural gas in which red iron oxide is reacted with the sulphur compounds found in natural gas to remove these compounds from the gas. The treating...
|
|
|
4719034 |
Solid silicone defoaming agent and method for its production
A solid defoaming composition, and a process for making the composition, is described. The defoaming composition comprises a solid nonionic surfactant, selected from aliphatic esters of glycerol...
|
|
|
4693866 |
Method of scavenging oxygen from aqueous mediums
Methods for chemically scavenging oxygen from an aqueous medium are disclosed. Linear, water soluble polyethyleneamines, such as pentaethylenehexamine, are added, as the sole oxygen scavenger, to...
|
|
|
4689156 |
Removal of ammonia from wastewater
A method is provided for removing ammonia from wastewater containing in excess of about 15 ppm NH 3 (N)-T. The method comprises treating the wastewater with an alkaline reagent selected from the...
|
|
|
4681737 |
Stabilized sodium erythorbate boiler corrosion inhibitor compositions and methods
A method of inhibiting corrosion due to dissolved oxygen is disclosed, whereby chelant-stabilized sodium erythorbate, alone or in combination with conventional corrosion inhibitors, is added to...
|
|
|
4676910 |
Means of controlling precipitation of Na.sub.2 SO.sub.4 from solutions of NaHSO.sub.3 oxygen scavengers
Concentrated solutions of sodium sulfite and related compounds can be inhibited against sodium sulfate precipitation by substituting potassium for a portion of the sodium contained in such...
|
|
|
4666610 |
Method and product for removal of chloramines, chlorine and ammonia from aquaculture water
A process for neutralizing chloramines, chlorine and ammonia in marine and fresh waters by adding an alkali metal formaldehydebisulfite in a dry or solution form in which the alkali metal...
|
|
|
4664844 |
Antifoams based on oil-in-water emulsions
In antifoams based on oil-in-water emulsions, the oil phase of the emulsion contains (a) C 12 -C 26 -alcohols, distillation residues obtained in the preparation of alcohols by an oxosynthesis...
|
|
|
4663089 |
Diffused bubble aeration system
A diffused bubble aeration system for small scale water supplies includes a plurality of water holding vessels having water inlet and water outlet couplings operatively coupled in series for series...
|
|
|
4655935 |
Detoxification of waste water from dithiocarbamate manufacture
Waste water from the preparation of salts of dithiocarbamic acid is detoxified by acidifying the waste water to promote hydrolytic decomposition of organosulfur compounds, passing an inert gas...
|
|
|
4652678 |
Process for the recovery of valuable components from the waste streams obtained in the preparation of urea
An improved process for recovering usable components from waste streams containing urea, including a dilute aqueous urea solution, which result from the preparation of particulate urea products....
|
|
|
4626411 |
Composition and method for deoxygenation
A composition containing a hydroxylamine compound; a quinone, a dihydroxybenzene, a diaminobenzene, or an aminohydroxybenzene compound; and a neutralizing amine is an excellent oxygen scavenger and...
|
|
|
4609472 |
Process for removal of alkali metal chlorate from alkali metal chloride brines
A process for removing chlorate ions from an impure alkali metal chloride brine removed from an electrolytic cell comprises acidifying the impure brine to a pH of less than about 2. The acidified...
|