| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
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| 01/07/1988 | EP0250410A1 A method of removing macromolecular organic dissolved and colloidal material from wood processing industry effluents. |
| 01/05/1988 | US4717484 Process for completing circulatory systems used to purify water and sewage |
| 01/05/1988 | US4717476 For households |
| 12/30/1987 | CN87104034A Method of and arrangement for purifying contaminated water |
| 12/30/1987 | CN87102425A Treatment of waste water containing methanol and hydrochloric acid resulted from producing o-methyl thio-phosphoryl dichloride |
| 12/23/1987 | EP0250394A2 Process and apparatus for the purification of waste water from printing plants, especially from screening installations |
| 12/17/1987 | WO1987007589A1 Method of and arrangement for purifying contamined water |
| 12/15/1987 | US4713223 Dissolving in acid; complexing impurities; precipitating iron |
| 12/15/1987 | US4713175 Water purifier comprising stages mounted side-by-side to unitary header |
| 12/12/1987 | CN86208402U Effluent treating device |
| 12/10/1987 | DE3619086A1 Process for desalting aqueous solutions, apparatus for carrying out the same and use thereof |
| 12/08/1987 | US4711723 Water purification system |
| 12/02/1987 | EP0247852A1 Process and apparatus for producing aqueous silver ion-containing solutions |
| 12/02/1987 | CN87103664A Process for treating the efflvent from cyanogenation in the polymethylmethacrylate plant |
| 12/01/1987 | US4710367 Hot water washing, leaching with hydrochloric acid |
| 12/01/1987 | US4710301 Wastewater purification process |
| 12/01/1987 | US4710300 Method for processing of organic materials containing nitrogen compounds |
| 11/24/1987 | US4708806 Destruction of nitrated aromatics |
| 11/24/1987 | US4708804 Method for recovery of cyanide from waste streams |
| 11/12/1987 | DE3615774A1 Transportable device for the treatment of spent emulsions, solutions, industrial effluents and the like |
| 11/10/1987 | US4705639 Ferrous and sulfide treatment of electroplating wastewater |
| 11/10/1987 | US4705638 Waste water treatment |
| 11/05/1987 | WO1987006491A1 Device for dephenolating waste water from coking plants |
| 11/05/1987 | DE3615132A1 Verfahren zur entphenolung eines konzentrates einer umkehr-osmose-anlage einer kokerei Method of dephenolising a concentrate of a reverse-osmosis unit of a coking plant |
| 11/04/1987 | EP0243664A2 Process for purifying flue gas |
| 10/28/1987 | EP0242641A2 Process for waste water treatment |
| 10/22/1987 | WO1987006152A1 Methods for selectively reacting ligands immobilized within a temperature-sensitive polymer gel |
| 10/20/1987 | US4701221 Precipitation from waste water, concentration and ripening |
| 09/30/1987 | EP0238773A1 Apparatus for raising the oxygen concentration in water |
| 09/30/1987 | EP0238731A2 System for removing toxic organics and metals from manufacturing wastewater |
| 09/30/1987 | EP0238639A1 Method of treating fluids. |
| 09/30/1987 | EP0238571A1 Process for recovering acetic acids from waste water |
| 09/22/1987 | US4695386 Process for the decolorization of pulp mill process streams |
| 09/15/1987 | US4693873 Reacting with a polysulfide |
| 09/15/1987 | US4693798 Method of treating contaminant ions in an aqueous medium with electrolytically generated ferrous ions, and apparatus therefor |
| 09/10/1987 | DE3607615A1 Waste water (effluent) treatment plant |
| 09/02/1987 | EP0234827A2 Metal recovery process |
| 08/26/1987 | EP0233774A2 Carboxylated surfactant containing lubricants, production and use |
| 08/25/1987 | US4689154 Process for removing phosphorus from industrial waste water |
| 08/25/1987 | CA1226081A1 Method and apparatus for reducing the aluminum content of alkaline solutions |
| 08/19/1987 | EP0232861A2 Method and apparatus for the disintegration and destruction of hazardous and toxic sludge materials |
| 08/18/1987 | US4687577 Photographic processing baths |
| 08/18/1987 | US4687574 Portable waste water |
| 08/13/1987 | DE3603602A1 Process for preventing the formation of CaSO4 deposits on the semipermeable membrane used in reverse osmosis |
| 08/05/1987 | EP0230894A2 Method of an apparatus for water treatment |
| 08/05/1987 | EP0230687A1 Process for removal of HCN and iron cyanide complex |
| 08/04/1987 | US4684472 Precipitation of waste chromium compounds utilizing an aqueous sulfide solution |
| 07/30/1987 | DE3602325A1 Process for purifying various waste waters produced in lead crystal finishing |
| 07/30/1987 | DE3602324A1 Process for the purification of waste waters produced in lead crystal grinding |
| 07/28/1987 | US4683054 Appliance for purifying water |
| 07/21/1987 | US4681677 Water processor having automatic shutoff and bypass means |
| 07/16/1987 | DE3600849A1 Clean water storage vessel for reverse osmosis plant |
| 07/14/1987 | US4680126 Separation and recovery of reusable heavy metal hydroxides from metal finishing wastewaters |
| 07/14/1987 | US4680114 Water purification apparatus |
| 07/08/1987 | EP0228104A2 Process for removal of iron cyanide complex |
| 07/01/1987 | EP0226667A1 Process for reducing the nitrate content in water |
| 06/30/1987 | US4676908 Waste water treatment |
| 06/24/1987 | EP0226284A1 Water recirculating apparatus and method |
| 06/23/1987 | US4675108 Apparatus for treating wash water from the manufacture of terephthalic acid |
| 06/23/1987 | CA1223375A1 Treating cyanide-containing effluents |
| 06/11/1987 | DE3643444A1 Water purification flocculation tank for restricted installation spaces |
| 06/10/1987 | EP0224812A2 Process for working up mother liquors resulting from the preparation of benzothiazole derivatives |
| 06/09/1987 | US4671882 Phosphoric acid/lime hazardous waste detoxification treatment process |
| 06/09/1987 | US4671879 Process for reducing the nitrate content in water |
| 05/26/1987 | US4668124 Disposal of material containing vanadium as landfill |
| 05/21/1987 | DE3540991A1 Process for operating industrial plants in which alkaline-reacting process waters occur |
| 05/06/1987 | CN85107864A Polution treatment and application of waste alkali contg. sulphur |
| 05/05/1987 | US4663387 Utilization of melamine waste effluent |
| 05/05/1987 | US4663043 Method of treating peroxide-containing wastewater |
| 04/29/1987 | EP0219757A1 Detoxification of waste water from dithiocarbamate manufacture |
| 04/23/1987 | DE3535583A1 Verfahren zur rueckgewinnung von in abwaessern befindlicher essigsaeure Method for the recovery of in-acetic acid wastewater |
| 04/21/1987 | US4659471 Method of controlling an anaerobic treatment process |
| 04/21/1987 | US4659463 System to remove contaminants from water |
| 04/21/1987 | US4659460 Mobile fluid purification unit |
| 04/15/1987 | EP0218066A1 Wastewater purification process |
| 04/10/1987 | EP0151120A4 Method for removing heavy metals from aqueous solutions by coprecipitation. |
| 04/09/1987 | WO1987002032A1 Process for recovering acetic acids from waste water |
| 04/09/1987 | WO1987002027A1 Water recirculating apparatus and method |
| 04/08/1987 | CN85108424A Method and apparatus for the clarification of sewage and other impure waste water |
| 04/07/1987 | US4655935 Detoxification of waste water from dithiocarbamate manufacture |
| 04/07/1987 | US4655932 Method and apparatus for the disintegration and destruction of hazardous and toxic sludge materials |
| 04/07/1987 | US4655928 Recycling |
| 04/07/1987 | US4655926 Process of treating effluent from a pulp or papermaking operation |
| 04/07/1987 | CA1220162A1 Subjecting cleaned waste water to anodic oxidation, flocculation, and biological treatment |
| 03/31/1987 | US4654148 Process for the removal of iron cyanide complex or complexes from an aqueous solution |
| 03/26/1987 | WO1987001688A1 Method of treating fluids |
| 03/24/1987 | US4652381 Battery plant waste water treatment process |
| 03/17/1987 | CA1219384A1 Waste water treatment |
| 03/11/1987 | CN86201369U Movable equipment of preparing injection water |
| 03/11/1987 | CN85106350A Aerobic process for two-stages treating of high loading waste water |
| 03/10/1987 | US4649036 Process for the manufacture of zeolites 4A having a high crystallinity and a fine granulometry and being particularly suitable for the formulation of detergent compositions |
| 03/04/1987 | EP0212178A2 Water flocculating process and plant |
| 02/17/1987 | US4643831 Water purification method and apparatus |
| 02/05/1987 | DE3527589A1 Process for operating industrial plants in which cyanide-containing waste waters are produced |
| 02/03/1987 | US4640769 Apparatus for photographic film processor pollution control |
| 01/29/1987 | DE3618186A1 Water distribution system for a mobile or stationary decontamination plant |
| 01/28/1987 | EP0209789A2 Method of separating pollutants from water-solvent mixtures |
| 01/28/1987 | EP0209734A1 Process for the recovery of amine and metal compounds in the preparation of polyphenylene ether |
| 01/28/1987 | EP0209533A1 Process and system for the flocculation substances which can be flocculated in suspensions, especially for cleaning the discharge water of deinking plant. |
| 01/20/1987 | EP0164402A4 Recovery of organic acids, catalysts and water from terephthalic acid manufacture. |