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| Number | Title | Issue Date |
| 4566912 | Method of regenerating alkali-containing wash solutions utilized for cleaning containers Separation of dissolved aluminum, copper, and other heavy metals and/or carbonates from sodium hydroxide or potassium hydroxide containing wash solutions utilized during the mechanical cleaning of metal-clad containers, especially bottles. This separation... | 01/28/1986 |
| 4564464 | Hectorite based paint spray booth detackifying slurries and methods of use thereof Paint spray booth detackifying and clarification compositions and methods are disclosed. The compositions are pumpable, hectorite clay containing slurries. In addition to hectorite, which has been proven as a most effective detackifying agent, the slurrie... | 01/14/1986 |
| 4563283 | Process for clarifying bicarbonate bearing waters using measurement and control of carbon dioxide content This invention relates to a process for achieving and maintaining the clarity of bicarbonate bearing waters. The process has application to treating bicarbonate bearing waters where such waters are for injection into a subsurface formation, for waste disp... | 01/07/1986 |
| 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 still, is supplied to an ammonia water at the final stage of ... | 12/17/1985 |
| 4551602 | Electrical machining using an aqueous solution with a recycled surface active agent An electrical machining system utilizing a machining liquid consisting at least in a major part of an aqueous solution containing a deionized water and a surface active agent dissolved therein, the latter having a temperature-dependent solubility in the s... | 11/05/1985 |
| 4539119 | Process for the treatment of waste and contaminated waters with improved recovery of aluminum and iron flocculating agents Waste-containing (contaminated) waters are treated for reuse and disposal with acceptable environmental improvements by adding a sulfate salt of aluminum and/or iron alkalized to form a waste-cohering hydroxide floc in one or more treatment plants, recove... | 09/03/1985 |
| 4537685 | Method for separating intermixed solids and liquids A mixture containing solid and liquid components is saturated with a polyelectrolyte compound, over-flocculating the solids contained therein and causing the solids to coalesce into masses or globules. These coalesced masses may then be separated from the... | 08/27/1985 |
| 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 or more reagents and a gas for depositing the suspension in... | 05/28/1985 |
| 4518505 | Thermal softening process A process for heating and softening of hard water by direct heat exchange with steam. The steam is directly sparged into the hard water within a reaction zone and condensed in the water under a pressure sufficient to prevent boiling at the reaction zone t... | 05/21/1985 |
| 4517282 | 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 or more reagents and a gas for depositing the suspension in... | 05/14/1985 |
| 4504395 | Paint spray booth detackification composition and method Paint spray booth detackification compositions and methods are disclosed. The compositions comprise a hectorite clay, an anti-foaming agent and optionally, an aluminum oxide material and a montmorillonite clay. These compositions are introduced into a pai... | 03/12/1985 |
| 4500324 | Method of reducing the nickel content in waste water The nickel content of a waste water stream, such as a stream of grey water that is separated in the decanting operation of a partial oxidation process or blow-down water from a gas quench cooling and/or scrubbing operation is reduced to below 1 mg/l to pr... | 02/19/1985 |
| 4496374 | Compound and process for denaturing high solids paints An improved composition and process for denaturing or "killing" captured high-solids paint particles in aqueous wash solutions employed in gas scrubbing devices such as paint spray booths for extracting entrained particulated contaminants from the exhaust... | 01/29/1985 |
| 4492637 | Water separation process To reduce the amount of high quality energy utilized in removing water from a dilute ethanol solution, a two-stage process is used. The first stage removes eighty-five percent of the water using a low temperature apparatus and process and the remainder of... | 01/08/1985 |
| 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, contrary to prior belief, is able to effectively remove the fo... | 01/08/1985 |
| 4482460 | Process for removing carbon black from aqueous suspensions The invention relates to a process for removing carbon black from an aqueous suspension obtained by washing a gas containing carbon black with water. To this end, a gas stream comprising hydrocarbons and at least one inert gas is introduced into a suspens... | 11/13/1984 |
| 4481236 | Life extension of catalyst predip baths A method and apparatus for extending the useful life of an aqueous acid chloride solution that serves as a protective bath for an activator dip bath such as used in electroless copper plating. Means are provided for recirculating the acidic chloride solut... | 11/06/1984 |
| 4464266 | Removal of caprolactam and its oligomers from cooling water containing these compounds A process for removing caprolactam and its oligomers from cooling water containing these compounds, wherein gases are introduced into the cooling water and the foam which forms is separated off.... | 08/07/1984 |
| 4462976 | Method for the treatment of chloride-containing waste waters Treatment of waste water containing chlorides comprising treatment with Ca (OH)2 or CaCO3 to convert the chlorides to CaCl2, adding sulfuric acid to said water in a reaction vessel to produce hydrochloric acid and gypsum, ... | 07/31/1984 |
| 4455234 | Process of extracting a metal value To extract a metal value, particularly aluminium, from an aqueous feed stream containing the value to be extracted is treated in a recovery unit from which it passes to a contactor where it is contacted with a solvent stream including a partially water so... | 06/19/1984 |
| 4448696 | Process for recovering and recycling coagulant present in water treatment sludges An improved process for recovering and recycling coagulant present in water treatment sludges. The improvement comprises several steps. First, enough acid is added to the sludge to solubilize most, but not all, of the coagulant in the sludge. Next, the ac... | 05/15/1984 |
| 4440647 | Paint spray booth detackification composition and method Paint spray booth detackification compositions and methods. The compositions comprise a water dispersible polyamide-epichlorohydrin resin, a polymer formed by reaction of hexamethylene diamine and ethylene dichloride, and an amphoteric metal salt. These c... | 04/03/1984 |
| 4436643 | Regeneration of aqueous degreasing and cleaning solutions Process for regenerating alkaline and neutral silicate-free and phosphate-free cleaning solutions that are contaminated with emulsified mineral or natural oils by (a) adding thereto an alkali metal phosphate and/or an alkali metal silicate, and then (b) a... | 03/13/1984 |
| 4436629 | Method for recovering useful products from waste products obtained when manufacturing aluminium fluoride The invention relates to a method for recovering useable products from waste products deriving from the manufacture of aluminium fluoride on the basis of aluminium hydroxide and fluosilicic acid. Silica contaminated with fluorine and aluminium and obtaine... | 03/13/1984 |
| 4435290 | Process for the temporary storage of recyclable liquid wastes in underground salt caverns Salt caverns or cavities are used only for intermediate storage and not for permanent storage of liquid pumpable wastes, to avoid above ground installations for such operations as phase separation, neutralization and sedimentation. The caverns may be used... | 03/06/1984 |
| 4425238 | Removal of anionic compounds from water A process for removing anionic compounds from water which is recycled in manufacturing processes, and from waste water, by adding (1) water-soluble products obtained by reacting an alkylating agent, having an aromatic substituent, with a cationic polyelec... | 01/10/1984 |
| 4422940 | Method of neutralizing and detoxifying wastes containing organic compounds A method of neutralizing and detoxifying waste material containing both an acid and a toxic organic compound. The waste material is combined with sufficient oil and sufficient caustic to form a pumpable slurry having a pH of 7 or higher. The oil is then s... | 12/27/1983 |
| 4416767 | Method and apparatus for the removal of excess sodium reagent and byproducts of reaction produced during the destruction and removal of polychlorinated biphenyls from oil A method for removing the excess sodium and byproducts of reaction which occur during the destruction of PCBs from oil. A predetermined quantity of water is mixed with the decontaminated oil and the byproducts, which include sodium chloride and polyphenyl... | 11/22/1983 |
| 4415543 | Process for treating phospho-gypsum waste product from wet-acid process of making phosphoric acid This disclosure concerns a process for treating phospho-gypsum waste product from the wet process method of making phosphoric acid including the steps of water washing the phospho-gypsum to remove all but an acceptable level of fluorine before the phospho... | 11/15/1983 |
| 4405463 | Process for stabilizing silica-rich geothermal brine to prevent silica scaling A process for stabilizing silica-rich geothermal brine to prevent silica scaling comprises selectively providing a supply of ferric ions, allowing the silica-rich brine to combine with the ferric ions to form insoluble, iron-rich siliceous material and se... | 09/20/1983 |
| 4404105 | Process for treatment of waste Process for the irreversible treatment of toxic waste by means of a silicate, in the presence of water, in such a way as to form a solid aggregate includes treatment of the silicate in an acid medium, for the purpose of obtaining silicic acid of low molec... | 09/13/1983 |
| 4402834 | Method for dewatering sludge-type material A process of dewatering sludge in which raw sludge and a flocculating agent are first mixed by suitable means, then fed into a rotary filter drum or similar device to effect thickening of the sludge and partial dewatering thereof. The now thickened sludge... | 09/06/1983 |
| 4379746 | Method of destruction of polychlorinated biphenyls A field method for removing polychlorinated biphenyls (PCB's) and similar halogenated aromatic hydrocarbons from silicone based oils and hydrocarbon fluids such as transformer oils contaminated with them by contacting the contaminated oil with a hydrocarb... | 04/12/1983 |
| 4378235 | Scrubbing media for removing volatile organic material from paint spray booths An improved method for recovering volatile organic paint carrier from paint spray booths of the type comprising a chamber, a duct system for passing air down through such chamber to remove volatile organic paint carrier and over-sprayed paint particles, a... | 03/29/1983 |
| 4377486 | Organic sludge dewatering process A process for achieving the partial dewatering of an organic sludge by isolating a batch of the sludge, acid adjusting its pH into a range from 3 to 5, and adding an oxidizing reagent in the presence of the acid in sufficient quantity so that within one-h... | 03/22/1983 |
| 4366066 | Stabilization of softened water with self-generated CO2 Apparatus and a method of adding CO2 to softened water flowing through a series of interconnected flash chambers after the softened water has been directed out of a settler. The inlet of the settler receives preheated hard water after the hard ... | 12/28/1982 |
| 4362628 | Method and apparatus for cleaning basins Apparatus for cleaning sediment from basins comprises a suction system that withdraws particulate-laden liquid from the bottom of the basin. A pump providing the suction transports the particulate-laden liquid to a first vessel or catch tank where primary... | 12/07/1982 |
| 4360402 | Process and apparatus for preparing waste paper for reuse A process and apparatus for preparing waste paper for reuse in a paper machine. Waste paper, water and de-inking chemicals are introduced to coarse pulping apparatus, and the coarsely pulped stock suspension is then thickened by filtration and treated in ... | 11/23/1982 |
| 4357242 | Water purification method and apparatus A method for removing suspended solids and dissolved salts from water comprising setting up a whirlpool in the water, injecting a concentrated solution of flocculating agent into the whirlpool, withdrawing spent flocculating agent combined with contaminan... | 11/02/1982 |
| 4350597 | Apparatus and process for treatment of sludge An apparatus and a process are provided which are particularly suited for treatment of sludge eminating from a metal finishing solution regeneration process, especially aluminum finishing solution. The sludge is washed on a horizontal belt vacuum filter f... | 09/21/1982 |
