Matches 151 - 200 out of 267 < 1 2 3 4 5 6 >
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4724045 Pulp decolor process  
A process for the decolorization of alkaline pulp such as that derived from paper waste water wherein the waste water is contacted with a strong mineral acid, contacted with a coagulated agent and...
4717550 Process for purifying alumina  
The iron content of Bayer process streams is reduced by contacting said stream with a tertiary hydroxyl-containing polyamine.
4717484 Process for completing circulatory systems used to purify water and sewage  
Water or sewage which contains sludges containing organic waste materials or waste materials which can be chemically precipitated are mixed with a flocculant consisting of a metal salt solution and...
4713222 Iron removal from bayer process liquor  
The following inorganic compounds of iron, when added to Bayer process liquors, form a precipitate of the finely divided iron present in: A. Ferric oxide; B. Ferrous salts; or C. Ferrous...
4690752 Selective flocculation process for the recovery of phosphate  
A process for separating and recovering non-metallic minerals, particularly phosphate, from an ore containing non-uniform sized particles, including colloidal particles. The ore is slurried in an...
4670158 Primary treatment of wastewater  
A process for treating waste water which contains an undesirable level of suspended organic materials comprising a precipitation and coagulation by the controlled addition of lime and phosphoric acid.
4661262 Method and composition for deactivation of uncured paint  
The invention herein involves the capture and treatment of excess uncured paint which is produced during spray painting operations. In particular, the invention relates to alkyl sulfate-based...
4629477 Coagulating compositions containing a cyanamide component for coagulating lacquers, waxes and coating compositions  
The invention relates to coagulating compositions for coagulating lacquers, waxes and coating compositions, more especially two-component polyurethane lacquers, which contain a mixture of cyanamide...
4626356 Sludge concentration method  
A method of sludge concentration comprises forming a froth in the foaming zone by mixing a foaming agent, air and water, mixing the sludge feed with said froth and a polymeric flocculant in a...
4593986 Apparatus for developing or peeling alkali-type photosensitive film  
A developing or peeling solution for developing or imagewisely peeling an alkali-type photosensitive film containing a suspension of released photosensitive film is regenerated by introducing one...
4585561 Flotation process for the continuous recovery of silver or silver compounds from solutions or dispersions  
A flotation process for the continuous recovery of silver or silver compounds from solutions or dispersions is described, wherein finely divided, inert gas bubbles are injected into the dispersions...
4584096 Process to beneficiate phosphate and sand products from debris and phosphate tailing ores  
The method of beneficiating phosphate tailings and debris waste material is disclosed for producing enriched phosphate ore and a sand product which is usable for glass, cement and the like or for...
4563342 Method for producing basic aluminum sulphate (III)  
The present invention relates to a method for producing sulphate-poor, polynucleate aluminium hydroxide sulphate complexes of the general formula [Al(OH) x (SO 4 ) y (H 2 O) z ] n in which n...
4559146 Method of clarifying proteinaceous waste water containing solid impurities  
A method of clarifying proteinaceous waste water is provided involving feeding the water through a treatment zone where it is subjected to various treatment steps and from which it issues as a...
4555345 Method of treatment for separation of oil from oil-containing slurry waste  
An oil-containing slurry waste containing a soap component in the oil component thereof is foamed by stirring so that the oil component adheres to the froth produced by the foaming and rises to the...
4540484 Method and apparatus for separating selected particulate materials from a mixture of liquids and solids  
A chemical reagent is mixed with the mixture to form a resultant reaction mixture under substantially nonoxidizing or oxygen-free conditions. A continuous movement of the resultant reaction mixture...
4528102 Chemically cleaning aqueous fluid of insoluble solids  
A process for removing contaminating insoluble solids (e.g., rust, sand, scale, barite and drilling mud) from an aqueous fluid such as produced in well systems during cleaning operations before...
4519690 Process for developing or peeling alkali-type photosensitive film and apparatus used therein  
A developing or peeling solution for developing or imagewisely peeling an alkali-type photosensitive film containing a suspension of released photosensitive film is regenerated by introducing one...
4502959 Purification of secondary recovery waterflood liquids  
Polysaccharide gums, such as guar gum, are removed from an aqueous liquid by agglomerating the gum with a low molecular weight, water-soluble copolymer of styrene and maleic anhydride and...
4492636 Process for cleaning metal working fluids for re-use  
Disclosed is a process for removing foreign matter and tramp oil from a continuously recirculating metal working fluid. The process includes the use of saturated dissolved air flotation which,...
4478645 Process for the purification of sugar syrups  
A process for removing color, turbidity, flavor, and odor from impure, high Brix, sugar syrup involves entrapping the sugar impurities in an insoluble, primary calcium phosphate or aluminum...
4457850 Flotation aids and process for non-sulfidic minerals  
Flotation aids and a process for the flotation of non-sulfidic minerals. The flotation aids have the formula ##STR1## wherein R repesents an aliphatic, cyclic, or alicyclic C 7 -C 23 radical,...
4454047 Process of treating aqueous systems  
A process of treating an aqueous system which comprises adding to the system a stable emulsion of an aqueous internal phase in a non-aqueous external phase. The aqueous internal phase contains a...
4439290 Process for the separation of oil-in-water emulsions by electrolysis  
Process for the continuous separation of oil-in-water emulsions, which may contain surfactants, for example oil- and surfactant-containing effluents, by electrolysis, which comprises electrolysing...
4387034 Mixed alkylthionocarbamates flotation collectors and ore dressing methods in which the collectors are employed  
A collector for use in concentrating metal values in ores by flotation, said collector comprising a synergistic mixture of O-isopropyl N-ethylthionocarbamate and O-isobutyl N-methylthionocarbamate....
4385995 Method of recovering and using fine coal  
Method of recovering and using heretofore lost or discarded coal fines which are a product of various coal washing processes comprising coating the fine coal with a oil/water mixture, separating...
4377473 Method for concentrating the exinite group macerals from coal by froth flotation  
A method for separating the exinite group macerals from the total coal by froth flotation in the presence of at least one short chain alcohol frothing agent and at least one methyl polyglycol type...
4376708 Flotation processes using ureylenes  
This invention relates to ureylene prepared by reacting an oxyalkylated polyamine with urea and to uses of such ureylene for example in removing oils, solids, and combinations thereof from aqueous...
4372844 Aromatic and benzothiophene extender oil composition for ore floatation  
An extender oil characterized as having a viscosity at 100° F. in a range of about 40 to about 250 SUS and an aromatic content in the range of about 60 to about 85 wt % of the total collector...
4372864 Reagent for froth flotation of bituminous coal  
A reagent and a method for using the reagent for treating a solid material disposed in a liquid medium and having an oxygen-controlled surface condition. The reagent includes a liquid hydrocarbon,...
4348287 Zirconium compounds as flotation aid  
This invention relates to the use of zirconium compounds and complexes thereof as flotation aids in a wide variety of systems.
4340487 Process for purifying water  
A process is provided for removing suspended solids from a waste water stream exiting from a wet rendering plant, a centrifugal rendering plant and/or a hide curing brine system before the stream...
4340488 Process and equipment for ultrasonic conditioning of sewage sludges  
The invention serves for conditioning and sterilization of sludges originating from sewage treatment plants, and from water preparing plants, respectively, in such a manner, that both the...
4337123 Process for the production of fuel alcohol, without vinasse  
A process for the production of fuel alcohol from fermented plant mashes, without vinasse. In this process alcohol is produced from fermented mashes obtained from diverse raw plant materials. The...
4320108 Process for the removal of metals from carbon black  
The invention relates to a process for the removal of metals, especially of iron and/or nickel and/or vanadium or their compounds, from carbon black. To this end, the invention provides for an...
4311595 Flotation process for purification of waste water  
In a flotation method for purification of industrial or municipal waste water, in which the waste water comes in contact with electrodes having an electrical potential capable of electrolytically...
4308148 Preparation of water soluble polymeric flocculants by photopolymerization of hydrophilic monomers  
Water soluble polymeric flocculants are prepared by photopolymerizing olefinically unsaturated hydrophilic monomer(s), the photopolymerization recipe including a polyhydroxylated organic additive,...
4303780 Ureylenes and uses thereof  
This invention relates to ureylene prepared by reacting an oxyalkylated polyamine with urea and to uses of such ureylene for example in removing oils, solids, and combinations thereof from aqueous...
4289628 Process for separating solids from liquid matter  
The invention relates to a process for separating solids from liquid matter by means of gravity, using a three-dimensional filter element and an alluvial filter layer wherein a gas is fed into the...
4282256 Preparation of an animal feed supplement from fish cannery process waste water  
There is disclosed a method for the preparation of an animal feed supplement from fish cannery waste process water in which the water is maintained under aerobic conditions and is processed through...
4267059 Auxiliary for improving retention, dewatering and working up, particularly in the manufacture of paper  
An auxiliary for improving the retention of flushable solids, for accelerating the dewatering of suspensions and for more rapidly working up industrial waters, effluents and sludges by the addition...
4263148 Process for removing humic matter from phosphoric acid solutions  
A process is disclosed for removing colloidal and non-colloidal humic matter from an aqueous solution of phosphoric acid, the process comprising (a) treating the phosphoric acid solution with a...
4251362 Method of, products and devices for processing polluting materials such in particular as hydrocarbons cast up by the sea, waste sludges  
The invention relates to a method of treating in particular polluting materials such as hydrocarbons. Said materials are processed with at least one basic product such as hydraulic, natural organic...
4251363 Anionic polymeric flocculant combinations for settling phosphate slimes  
Phosphate slimes are effectively settled by the sequential addition of effective amounts of a low molecular weight acrylamide: acrylic acid copolymer of high anionicity and a high molecular weight...
4224149 Process useful in the flocculation of phosphate slimes  
Use of an effective amount of a precipitant or sequestrant for calcium ions improves performance of anionic polymeric carboxylic acid flocculants in flocculating phosphate slimes.
4209396 Methods for use in water purification particularly sewage treatment  
A method and apparatus for treatment of sewage and waste materials, and while applicable to larger installations, is particularly desirable for relatively small, for example family and multi-family...
4209397 Flocculants for aqueous systems  
A method of producing floc in an aqueous system by the addition to said system of a capped or terminated quaternary ammonium compound or mixture of such compounds.
4208282 Process for the purification of sewage while recapturing the fatty and albuminous matter in reusable form  
There is disclosed a process for the purification of sewage containing fatty and albuminous matter. Raw sewage, which is optionally subjected to primary settling in a primary settling tank, is...
4205147 Process for recovering modified polyvinyl alcohols from aqueous solution containing them  
Recovery of partially hydrolyzed copolymers of vinyl acetate and unsaturated carboxylic or sulfonic acid from aqueous solution dissolving them by adding an acid to the solution at a temperature of...
4203837 Process for removal of discrete particulates and solutes from liquids by foam flotation  
A process for removal of discrete particulates from liquids by foam flotation which is readily adaptable to continuous or batch processing. A continuous stream of foam, in which the gaseous medium...
Matches 151 - 200 out of 267 < 1 2 3 4 5 6 >