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| Number | Title | Issue Date |
| 7517435 | Process for the removal of mercury from solutions contaminated with mercury Mercury is removed from solutions contaminated with mercury, the solution contaminated with mercury being introduced into a distillation column above the column bottom, solvent being distilled off and solution depleted in mercury being stripped off at the column bot... | 04/14/2009 |
| 7374686 | Electrocoat manufacturing process The present invention provides a method of preparing an electrocoat coating composition, comprising forming an aqueous emulsion comprising a film-forming component and water and removing at least a portion of the water from the aqueous emulsion by ultrafiltration. | 05/20/2008 |
| 7357849 | Method and system for separating solids from liquids A method and system for treating feedwater includes evaporating a portion of the feedwater in a first evaporation chamber so as to separate water vapor from the remaining feedwater. Droplets of the remaining feedwater are dispersed into a stream of hot air produced ... | 04/15/2008 |
| 7328584 | Fresh water extraction device A method and apparatus for collecting fresh water through atmospheric water collection and salt water desalination. The apparatus is used for a method of utilizing deep ocean water to extract fresh water from atmospheric water vapor while producing a byproduct of de... | 02/12/2008 |
| 7267775 | Gas processing method using a filtered glycol solution The invention relates to a method and to a plant for processing a gas by means of a glycol solution wherein a feed comprising a gas, a glycol, water and salts is subjected to a first stage (5) of separating the gas from a liquid effluent and said liquid efflu... | 09/11/2007 |
| 7235183 | Glycerine foots salt separation system The present invention provides a method and apparatus for the recovery of salt from a glycerine process, allowing the salt to be used in a brine solution. A salt settling tank is positioned inline between the foots from a crude still bottom and a foot still. Salt se... | 06/26/2007 |
| 7232505 | Method of regenerating an aqueous glycol solution containing salts Method of regenerating a glycol solution containing water, hydrocarbons and salts. The glycol solution is expanded in drum (2), then distilled in column (7). The concentrated glycol collected at the level of reboiler (8) is placed under vacuum t... | 06/19/2007 |
| 7163636 | Multi-phase separation system A multi-phase separation system utilized to remove contaminants from fluids includes a pre-filtering module for filtering a contaminated fluid to provide a filtered contaminated fluid. A condenser module receives the filtered contaminated fluid and a contaminated ga... | 01/16/2007 |
| 6964728 | Separation process Bisphenol-A-bis(neopentylglycolphosphate) products of enhanced properties and processes for preparing them are described. One of the processes includes (a) mixing and reacting neopentyl glycol and bisphenol-A-bis(dichlorophosphate) in an inert polar organic solvent ... | 11/15/2005 |
| 6417128 | Methods and replacing water and cyclohexanone with acetic acid in aqueous solutions of catalyst This invention relates to methods of replacing water and cyclohexanone with acetic acid in an aqueous solution of catalyst, preferably a cobalt compound. Such an aqueous solution is produced by extracting catalyst with water from a cyclohexanone/water sol... | 07/09/2002 |
| 6387222 | Continuous isolation of a high-melting material by distillation A method of distillation for separating a material which is solid at ambient temperature from a lower boiling and lower melting point material, and the apparatus.... | 05/14/2002 |
| 6375803 | Mechanical vapor recompression separation process A method and apparatus for removing a contaminant from a fluid feed stream containing the contaminant. The method includes the steps of providing a feed stream (10) and heating it in a first step (18) to at least partially remove some of the contaminants ... | 04/23/2002 |
| 6344361 | Method of detecting the presence of impurities, unit and method for vaporizing liquid, and double air-distillation column A film-type vaporizer in a vaporization enclosure, for example the upper column of a double air-distillation column, is associated with a measurement and analysis box where a polished surface and a spillway reconstruct the flow of liquid in the vaporizer ... | 02/05/2002 |
| 5958233 | Apparatus for efficiently dewatering corn stillage solids and other materials A new process and apparatus efficiently dewater aqueous solids residual after fermentation and distillation, such as corn stillage. The feed stream of aqueous solids slurry is fractionated into two or more substreams in such a way that one of the substrea... | 09/28/1999 |
| 5954970 | Process for treating sludge using low-level heat The present invention describes a process and an apparatus for treating sludge having both liquid and solid constituents. The sludge is first heated to a minimum optimum draining temperature. During heating, mechanical dewatering of the sludge occurs. In ... | 09/21/1999 |
| 5925224 | Method of and apparatus for purifying a solvent A solvent containing low-boiling and high-boiling impurities in an evaporating section, so that the high-boiling impurities is left as a tank bottom waste, and a solvent vapor from the section is guide through a mist separator into a condenser. A condensa... | 07/20/1999 |
| 5738761 | Sewage treatment process and apparatus A waste water treatment system includes a preliminary first stage separator for separating an aqueous phase from other materials. A pressure vessel sedimentation follows for removing most of the remaining solids from the waste material. The liquid and a m... | 04/14/1998 |
| 5500098 | Process for regeneration of volatile acids Volatile acids containing metal salt impurities, such as metal pickling solutions-are regenerated by a process in which the acid is subjected to sulfuric acid distillation. Resulting volatile acid vapor is condensed and recycled to the pickle tank, while ... | 03/19/1996 |
| 5487818 | Process for separating phthalimido-peroxycaproic acid from solutions in organic solvents A process for separating phthalimido-peroxycaproic acid (PAP) from solutions in organic solvents, wherein the organic solvents have a solubility in water equal to or lower to 10% by weight, is provided. The process employs the following steps: (a) dispers... | 01/30/1996 |
| 5484511 | Process for the removal of impurities from hydrazine hydrate A process for the removal of organic impurities and dissolved salts from hydrazine hydrate and aqueous solutions thereof by distillation of the hydrazine hydrate under reduced pressure, passing the hydrazine hydrate vapor through an adsorbent, and condens... | 01/16/1996 |
| 5454878 | Method for removing hydrocarbon contaminants from solid materials A system for removing hydrocarbons from solid materials. Contaminated solids are combined with a solvent (preferably terpene based) to produce a mixture. The mixture is washed with water to generate a purified solid product (which is removed from the syst... | 10/03/1995 |
| 5454953 | Process for the collection and treatment of biological waste A multiple-stage process for the collection and treatment of biological waste, and for rendering the biological waste biologically inactive for the safe and economical environmentally non-contaminating disposal thereof. Moreover, also disclosed is an arra... | 10/03/1995 |
| 5348588 | Evaporative treatment of inorganic saponifier wash water The aqueous effluent from the wash cycle of a process for cleaning electronic circuit assemblies of rosin flux and other organic residues with an aqueous alkaline cleaning solution comprises evaporating the effluent to cause separation of an aqueous vapor... | 09/20/1994 |
| 5344528 | Recovery of phenol from low concentrations with sodium sulfate Phenol plant waste water containing small amounts of phenol and sodium sulfate is successfully distilled through the addition of recovered sodium sulfate to enhance the volatility of the phenol relative to water; at least a portion of the sodium sulfate i... | 09/06/1994 |
| 5330624 | Fractionator-reboiler sludge removal system and method Sludge is removed from a reboiler while the reboiler is supplying heat to a fractionator, by using sludge removal apparatus added to the reboiler. The reboiler to which the sludge removal apparatus is added comprises an evaporative type shell and tube hea... | 07/19/1994 |
| 5328490 | Calcium chloride salt manufacturing process A method of producing calcium chloride granules of a specific size from a calcium chloride and water solution in a completely closed environment by controlling the rate of fall of a specific size of solution droplet through an up-current of hot, dry gas.... | 07/12/1994 |
| 5302685 | Method for preparing organopolysiloxane powder Organopolysiloxane powder is prepared from an organopolysiloxane solution by admitting the organopolysiloxane solution into a planetary-screw mixer and agitating the solution at a sufficient temperature to allow a low-boiling liquid component to evaporate... | 04/12/1994 |
| 5298128 | Process for recovering polyurethane from polyurethane waste pastes Polyurethane can be reclaimed from solvent-containing or solvent-free polyurethane wastage by adjusting the amount of solvent, preferably with methyl ethyl ketone; adding an emulsifier, preferably, acylpolyethyleneglycolester; then adding about twelve tim... | 03/29/1994 |
| 5294305 | Ethylene glycol recovery process The present invention is an improved process for the recovery of ethylene glycol from spent glycol generated in the manufacture of polyethylene terephthalate. The spent glycol typically consists of metal oxide catalyst residues, low molecular weight terep... | 03/15/1994 |
| 5268073 | Continuous process for concentrating solutions containing salts and resins In concentrating solutions containing 1 to 10% by weight of salts and resins, the yield and economics and trouble-free running can be improved by using a flow tube which has a steady curvature at least in the last third and is sized in its diameter in suc... | 12/07/1993 |
| 5252188 | Process for producing hydroxyacetaldehyde This invention provides a process for producing crystalline hydroxyacetaldehyde precipitated from a complex mixture of products provided by the pyrolysis of a carbohydrate-containing feedstock. The method includes distilling a first condensate under reduc... | 10/12/1993 |
| 5225048 | Method for concentration of liquids The invention relates to a distillation method and an apparatus for the concentration and purification of water-containing liquid chemicals. The distillation is performed using constant, predetermined distillation parameters.... | 07/06/1993 |
| 5183540 | Method for recovering solvents through the use of an extender Method for the recovery of solvent from a solvent-based wash liquid containing non-hazardous waste resulting from an equipment cleaning operation. The wash solution typically averaging approximately 90 percent solvent and 10 percent resin, pigments and ot... | 02/02/1993 |
| 5158651 | Process of centrifugally removing inorganic compounds from polyester glycol recovery bottoms A process for removing inorganic compounds from glycol recovery still bottoms resulting from the manufacture of poly(ethylene terephthalate), the novel process using a small amount of phosphoric acid to precipitate the antimony and then removing the titan... | 10/27/1992 |
| 5152887 | Process for reclaiming waste gas treatment chemical When regenerating gas treating chemicals such as diethanolamine solution, the usual practice is to subject the chemicals to steam stripping. Ultimately such action is ineffective, and it is necessary to discard the chemicals. The waste chemical can be rec... | 10/06/1992 |
| 5126077 | Radioactive decontamination method using methylene chloride A radioactive decontamination method for decontaminating a radioactive-contaminated object by using methylene chloride in place of conventionally used hydrocarbon fluoride or perchloroethylene. The radioactive-contaminated object is impacted by methylene ... | 06/30/1992 |
| 5104492 | Recovery of carboxylic acids from water by precipitation from organic solutions Carboxylic acids are recovered from wet organic solutions by reducing the solutions' water content thus causing the acids to precipitate as recoverable crystals.... | 04/14/1992 |
| 5098525 | Process for disposing of residues deriving from the synthesis of chlorinated hydrocarbons The disposal of chlorinated pitches is carried out by a process which employs two treatments with an alcohol, which are carried out in cascade. Such treatments cause the precipitation of the suspended matter to take place. This is then caused to settle, and is... | 03/24/1992 |
| 5094722 | Process for the purification of a dimethylphenol isomer A purified desired isomer which is either 3,4- or 3,5-dimethylphenol is separated with a high yield from a dimethylphenol-containing fraction which contains both 3,4- and 3,5-dimethylphenols. The fraction is distilled so as to give a distillate which is e... | 03/10/1992 |
| 5091057 | Stripping process for water removal from alcohol A process for obtaining a substantially dry alcohol from a mixture comprising alcohol and water in a non-azeotropic amount by utilizing at least a portion of the alcohol in the mixture as the stripping medium.... | 02/25/1992 |
