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| Number | Title | Issue Date |
| 4274911 | Method of cooking cellulose material and preserving the heat and terpentine content of the cooking liquor A method of cooking cellulose material and effectively preserving the heat and terpentine content of the cooking liquor is disclosed. The cooking liquor is allowed to expand and the expansion steam (blow steam) is conveyed into a bed of cellulose material... | 06/23/1981 |
| 4273611 | Method for treating a spent emulsion of oil in water used in an industrial process, and the apparatus for carrying out the method A method for treating a spent emulsion of oil in water used in an industrial process, in particular an emulsion of cutting oil in water is described. The method comprises at least one stage in which heat energy is supplied continuously to said emulsion fo... | 06/16/1981 |
| 4265701 | Liquid concentration method An evaporator for increasing the solids content of a liquid-solids mixture employs vapor compressor means to recycle superheated vapors that are boiled off the mixture by a heat transfer fluid. The super-heated vapors are forced into the mixture before th... | 05/05/1981 |
| 4246233 | Inert carrier drying and coating apparatus An inert carrier process for drying radioactive waste material and for incorporating the dry material into a binder from which the dried material will not be leached is disclosed. In this process, a hot inert liquid carrier is provided into which the solu... | 01/20/1981 |
| 4245998 | Method and apparatus for crystallization of solution containing salts To remove salts from a solution containing the salts, hot air is injected downwards into the solution in a concentrator, and the solution is concentrated by direct contact with the hot air, thereby enhancing an evaporation efficiency in the concentrator a... | 01/20/1981 |
| 4239589 | Process for oxidation of black liquor High recovery of useful energy from the heat of reaction in the oxidation of black liquor is obtained by integrating the oxidation into the multiple effect evaporation system of the pulp mill recovery sequence. The heat of reaction is thereby recovered as... | 12/16/1980 |
| 4236974 | Process and apparatus for purifying waste waters A process and apparatus for purifying waste water which comprises introducing said waste water into a separation zone, removing a portion of the impurities recovered from said separation zone, and concentrating said impurities by their introduction into a... | 12/02/1980 |
| 4217176 | Evaporator A vapor compression distiller has a vertically oriented cylindrical tank and a heat exchanger having a plurality of groups of heat exchange tubes disposed one above the other. Internal baffling channels vapor through the groups of heat exchange tubes in a... | 08/12/1980 |
| 4208298 | Process for treating radioactive liquid waste In a process for treating radioactive liquid waste having an evaporation concentration device, including a concentration vessel, and a steam heater having steam inlet and outlet lines and operating to heat, with heating steam, radioactive liquid waste in ... | 06/17/1980 |
| 4201676 | Method of heat treating a material A material in slurry form is heat treated by being sprayed onto a fluidized bed wherein its combustible component is burnt to generate heat. Elutriated fines material is recycled to the bed to control the mean particle size distribution in the bed and in ... | 05/06/1980 |
| 4178244 | Process for removal of hardening and galvanizing waste water Waste waters from salt bath hardening and galvanizing operations are removed through evaporation of the injurious material containing waste water and complete detoxification of the concentrate from the evaporation. The waste waters are first brought to a ... | 12/11/1979 |
| 4178202 | Method and apparatus for facilitating the disposal of cutting liquid A method of facilitating the disposal of waste cutting liquid consisting essentially of an emulsion of partly soluble oils and water comprises subjecting a trickling flow of the liquid to the action of a current of hot air at a temperature of from 80° to... | 12/11/1979 |
| 4169791 | Apparatus and process for volume reduction of aqueous waste through solar evaporation A lagoon containing aqueous waste to be volume reduced is provided with a cover having one or more segments, each of which is mounted upon a frame and is movable from a covering position to a position adjacent the lagoon. During fair weather, the cover is... | 10/02/1979 |
| 4155804 | Removal of volatile organic components from spent sulfite effluent Volatile organic components are removed from the effluent liquor of an acid sulfite digestion process by concentrating the effluent liquor in multiple stages to form an organic-rich aqueous fraction, an organic-lean aqueous fraction and a high solids cont... | 05/22/1979 |
| 4119560 | Method of treating radioactive waste An inert carrier process for drying radioactive waste material and for incorporating the dry material into a binder from which the dried material will not be leached is disclosed. In this process, a hot inert liquid carrier is provided into which the solu... | 10/10/1978 |
| 4116757 | Solar evaporation of alkaline trona-process waste pond liquors with acid black 2 and acid green 1 A process is provided for increasing the rate of solar evaporation of water from alkaline trona-process waste liquors which comprises introducing to the waste liquors an effective amount of a dye selected from the group consisting of Acid Black 2 and Acid... | 09/26/1978 |
| 4087253 | Method of obtaining caustic soda from a sodium chloride liquor containing sulphate ions recovered from an electrolytic cell A method of obtaining caustic soda and pure sodium chloride from an electrolytic cell liquor containing also sulfate ions including the steps of concentrating the liquor through multiple effect evaporation, cooling the concentrate obtained, separating the... | 05/02/1978 |
| 4079585 | Method and apparatus for removing volatile fluids A method and apparatus for the removal and recovery of volatile or evaporable substances from materials containing them. In other embodiments, the invention is readily applicable for the simultaneous incineration and concentration of such materials, parti... | 03/21/1978 |
| 4076576 | Method and apparatus for the evaporation of liquids Liquids which, when dilute, tend to froth during mixing or boiling are evaporated in an evaporator by feeding the entire liquid quantity to be evaporated into the evaporator, bringing only part of it in indirect heat exchange contact with a hot medium to ... | 02/28/1978 |
| 4069033 | Extraction of fertilizer salts and organic substances of high nutritive value from industrial waste waters A process for obtaining fertilizer salts and organic substance concentrates of high nutritive value from industrial waste waters, in particular of waste waters of the agricultural, food processing and food preserving industries, with a high content of Tot... | 01/17/1978 |
| 4017421 | Wet combustion process Aqueous solutions and suspensions of solid particles, even those containing less than one percent of organic materials, may be combusted with air, oxygen, or their mixtures in a process which provides for preheating in countercurrent batches of the raw or... | 04/12/1977 |
| 4002525 | Chemical recovery from waste liquors utilizing indirect heat exchangers in multi-stage evaporation plus contact steam stripping A method of treating waste liquors such as those derived from the sulfite or Kraft pulp making process is disclosed which provides recovered by-products of high purity while moreover decreasing the total amount of process steam required. The method compri... | 01/11/1977 |
| 3997300 | Black liquor oxidation apparatus Gas-liquid contact reaction efficiency in a two stage heavy black liquor oxidation process is improved by co-current contact in the first stage and countercurrent contact in the second stage or vice versa. Such improved efficiency is sustained by preventi... | 12/14/1976 |
| 3992372 | Processing polycaprolactam extraction liquors A process for processing polycaprolactam extraction liquors by evaporation of water and distillation of the residue in which the evaporation of water is carried out in a plurality of stages and the evaporation energy for the removal of the bulk of the wat... | 11/16/1976 |
| 3973987 | Water recycle treatment system for use in metal processing A water recycle treatment system comprising two main treatment sub-systems for treatment of contaminated water from a plurality of concentrated solutions and rinse baths to separate out the impurities therein. A first sub-system treats less concentrated s... | 08/10/1976 |
| 3963424 | Cooling aqueous alkali metal hydroxide liquors by vacuum evaporation with subsequent solids precipitate removal A method and apparatus for cooling aqueous alkali metal hydroxide liquors such as, for example, caustic soda liquors, involving the vacuum cooling of a body of such liquor in an evaporating chamber having a overhead vapor outlet which communicates with a ... | 06/15/1976 |
| 3956059 | Method of reducing moisture content of particulate slurries Water evaporates from a thin film, which can be developed over the surface of soil/water slurries, at a rate as much as 30 times that of the normal pan evaporation rate in a given locale. Utilizing this discovery, a slurry having suspended solid particles... | 05/11/1976 |
