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3880756 |
Method and apparatus for concentrating sludge
A sludge treatment system including a reversible refrigeration circuit with a pair of heat exchangers serving alternating and opposite functions as condensers and evaporators for sequentially...
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3875357 |
Sewage disposal system
A sewage disposal comprising a fossil-fuel fired steam generating unit having a furnace chamber and burner means for maintaining a high temperature zone in the furnace chamber, nozzle means for...
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3864252 |
Method of Apparatus for Treating Sewage
The treatment of wastes such as domestic sewage and the like by a method of nd apparatus for handling the run-off from a septic tank or other separating unit including the evaporation and/or...
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3856674 |
FILTERING PROCESS AND APPARATUS
A process and apparatus for filtering a substance flowing through a passage in which a filter is introduced through inlet and outlet ports so that a part of the filter extends across the passage, a...
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3855069 |
FORMATION REDUCTION IN PRESSURE COKING EQUIPMENT
Formation of mineral type scale in pressure coking equipment used in coking waste materials in the liquid phase is eliminated by effecting the coking of such materials using direct counter-current...
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3852191 |
PROCESS AND APPARATUS FOR THE PRODUCTION OF A DISPERSION OR SOLUTION FROM COMMINUTED SOLID SUBSTANCES AND A DISPERSION MEDIUM OR SOLVENT
A continuous production of a dispersion or solution is provided by filtering liquid being processed continuously in a comminuting device. A filter is used to reduce and limit the size of particles...
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3849246 |
RECOVERY OF PAPER FIBER FROM WASTE MATERIAL CONTAMINATED WITH GREASE, WAX AND/OR SIMILAR MATERIAL
In a method of recovering reusable papermaking fibers from waste material containing substantial quantities of grease, wax and/or similar materials, such particularly as municipal waste including...
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3837491 |
LIQUID PURIFICATION APPARATUS AND PROCESS
A method for the continuous mechanical purification of a liquid containing solid and dissolved pollutants includes charging a liquid chamber with polluted liquid and simultaneously subjecting the...
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3817048 |
DEWATERING SLUDGES
Reduction of the liquid content of a sludge is facilitated by first freezing the sludge in droplet form by contacting the droplets with an inert liquid refrigerant which is immiscible with the...
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3803806 |
PROCESS FOR THE TREATMENT OF ACTIVATED SLUDGE
Hot flue gases containing suspended solid particles, oxygen and other water soluble and insoluble components are injected beneath the surface of sewage sludge. Heat and the above components are...
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3802561 |
PROCESS AND APPARATUS FOR SEPARATING PHOSPHORUS FURNACE SLAG AND FERROPHOSPHORUS FROM ONE ANOTHER
Phosphorus furnace slag and ferrophosphorus are separated from one another. To this end, a mixture of phosphorus furnace slag and ferrophosphorus, which is tapped off periodically from a phosphorus...
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3798784 |
PROCESS AND APPARATUS FOR THE TREATMENT OF MOIST MATERIALS
A process and an apparatus for the treatment of substances containing moisture in which electromagnetic energy is applied to the material alternately with mechanical dehumidification thereof.
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3762989 |
PYROLYSIS OF SPENT PULPING LIQUORS
Disclosed is a process for recovering the organic values in spent pulping liquors by heating aqueous spent pulping liquor in the absence of additive reagents at 490°-700°F under 1,000-3,500...
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3745782 |
SLUDGE SEPARATION SYSTEMS EMPLOYING REFRIGERATION MEANS
A sludge separation system, particularly of the type for promoting separation of alum sludge from the effluent of a potable water treatment plant, is provided with a pair of identical falling film...
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3737036 |
FILTER FOR POLYMER PROCESSING AND METHOD OF MANUFACTURE
A filter arrangement for a method of molten polymer processing is disclosed in which a plurality of filter elements are disposed in a filter cavity, with each element including filter surfaces...
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3729414 |
DEWAXING AND DEOILING PROCESS
In a rotary filter dewaxing-deoiling process, the method and apparatus for improving the deoiling of the wax cake is described, characterized by utilizing a plurality of transverse solvent...
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3720645 |
METHOD OF OBTAINING GEL-FREE EPOXY RESINS BY FILTRATION IN THE MOLTEN STATE
Gel-free epoxy resins are obtained by filtration of the resin molten rather than in a solvent.
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3718256 |
PARTICLE SEPARATOR AND METHOD
Particles are removed from fluids, such as water, previously subjected to electrostatic fields. When subjected to an initial electrostatic treatment, the fluid undergoes a reduction in surface...
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3717545 |
PROCESS FOR TREATING WASTE LIQUORS
Closed circuit process for treating waste liquors, such as spent sulfite liquors from wood digestion by coking the liquors in the liquid phase under pressure under turbulent flow conditions to form...
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3716474 |
HIGH PRESSURE THERMAL TREATMENT OF WASTE OIL-CONTAINING SLUDGES
Oil-water emulsion-type sludges, in particular refinery pit sludges are thermally treated at a temperature of at least 750° F under pressure of at least 3,000 psi to give a gas phase containing...
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3693959 |
COLD TRAPS FOR LIQUID METAL
A cold trap for liquid metal comprises a vessel, a cylindrical duct member being arranged concentrically in the vessel. Flow of liquid metal from inlet into the vessel is downwardly along the...
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3677405 |
LIQUID AND SLUDGE TREATMENT
In water or liquid treatment, settled soft sludge is subjected to a first centrifugation to obtain cleaned water or liquid, and a concentrated aqueous sludge. This aqueous sludge is then...
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3676334 |
WASTEWATER TREATMENT SEQUENCE
An improved process for treating wastewater is based on a pre-treatment to convert high molecular weight soluble organic material in raw wastewater into organic material of low molecular weight....
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3672507 |
FILTER APPARATUS AND METHOD
An apparatus and method for filtering hot fluid material including a filter system having a filter formed from a continuous screen passing through a closed cavity through which the material flows....
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3670888 |
METHOD OF SEPARATION OF WAX FROM OIL
Wax is separated from a wax-oil mixture by centrifuging at a temperature below 30° C. and below the pour point of the mixture, by first of all agitating the mixture to render it mobile. The...
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3655338 |
CENTRIFUGAL FILTRATION OF MAGNESIUM SULFITE SLURRIES
Magnesium sulfite slurry, derived from the scrubbing of a waste gas stream for sulfur dioxide removal with a circulating aqueous magnesium oxide-sulfite slurry, is processed to recover a solids...
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3628341 |
PROCESS FOR SEPARATING AND PURIFYING CRYSTALS FROM A CRYSTAL SUSPENSION
A process for separating and purifying crystals from a crystal suspension by filtering the crystal suspension in a filter zone of a column under the influence of pulsation, delivering the crystal...
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3629075 |
METHOD AND APPARATUS FOR ELIMINATING WASTE HEAT AND REACTION WATER TOGETHER FROM FUEL CELLS
Method of eliminating waste heat and reaction water together from a fuel cell or battery includes bringing the fuel cell electrolyte into contact with a porous diaphragm through the pores of which...
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3625883 |
LIQUID WASTE TREATMENT PROCESS
An advanced liquid waste treatment process is provided for treating sewage and other liquid waste and having steps including centrifuging the waste through filter mediums to remove solids from the...
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3624665 |
MINIATURE SANITARY DISPOSAL PLANT
A miniature sanitary disposal plant which includes a toilet combined with an enzyme digester tank, an activated carbon-leaching bed, a separating tank, a chemical-neutralizing tank, a plurality of...
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3597769 |
WASTE DISPOSAL SYSTEM
This invention relates to a self-contained, noncontaminating waste disposal system useful over a prolonged period of time with particular utility in passenger carrying vehicles, such as waterborne...
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3568834 |
FILTERING ALKALINE METAL CLEANER
Process of fine filtering an alkaline metal cleaner containing emulsified soluble oil in which the requisite amount of aminopolyacetic acid or ammonium or alkali metal salt thereof is added to the...
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3547268 |
FILTRATION PROCESS
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3542196 |
LIQUID SEPARATION
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3531872 |
PROCESS AND APPARATUS FOR DELIQUIFYING FLUENT MATERIAL
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3520805 |
METHOD OF DISPOSAL OF RADIOACTIVE SOLIDS
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3515199 |
METHOD AND APPARATUS FOR RECOVERING SOLIDS DISSOLVED OR SUSPENDED IN A LIQUID SOLVENT
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3505175 |
LIQUID PURIFYING APPARATUS AND METHOD
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3482693 |
METHOD AND ARRANGEMENT FOR SEPARATING SOLID MATERIAL FROM A VISCOUS SUBSTANCE
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3471017 |
FILTERING PROCESS AND APPARATUS
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3448041 |
METHOD AND APPARATUS FOR TREATING BLOOD PRELIMINARY TO ITS USE IN TRANSFUSIONS
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3416663 |
Process for maintaining a perforated basket centrifuge free of basket plugging
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3416661 |
Method of centrifugally separating ice crystals from an aqueous solution
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3401925 |
Apparatus for separating materials
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3396512 |
Method and apparatus for the treatment of liquids
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3373097 |
Method for separation of a metalcontaining halide phase from a gangue-containing silicate phase and electrolysis of halide phase to obtain the metal
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3361259 |
Method of dewatering of coal slurries
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3343678 |
Beeswax capping separator and melter
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3318448 |
Fluid separating and cleaning method and apparatus
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3306236 |
Burner for waste materials and method of burning waste materials
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