| Patents for D01F 13 - Recovery of starting material, waste material, or solvents during the manufacture of artificial filaments or the like (527) |
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| 01/27/1987 | US4639514 Cyclic process for producing an alkali solution of cellulose carbamate and precipitating the carbamate |
| 12/02/1986 | CA1214749A1 Electrodialytic water splitting process for conversion of alkali metal sulfate values derived from spent rayon spin baths |
| 10/29/1986 | EP0198931A1 Method of multistage co-condensation of vapors and use of this method |
| 09/23/1986 | US4613416 Regeneration of solutions used in xanthation of cellulose |
| 09/10/1986 | CN85109341A Mechanical compress type evaporating concentrating apparatus |
| 09/24/1985 | CA1193816A1 Recovery of pump-out waste in the melt spinning of thermoplastic filaments |
| 06/11/1985 | US4522774 Integrated process for the production of textured polycaprolactam multifilament yarn |
| 03/12/1985 | US4504373 Electrodialytic water splitting process and apparatus for conversion of alkali metal sulfate values derived from spent rayon spin baths |
| 12/12/1984 | EP0127722A2 Method for the multistage co-condensation of vapours |
| 11/07/1984 | EP0124087A1 Method of enrichment of sulfuric acid |
| 10/23/1984 | US4477951 Acid bath with jets for supplying cellulose xanthates and gas trapping means |
| 06/26/1984 | CA1169615A1 Integrated process for the production of textured multifilament yarn |
| 12/21/1983 | EP0096239A2 Electrodialytic water splitting process for conversion of alkali metal sulfate values derived from spent rayon spin baths |
| 10/25/1983 | US4411880 Process for disposing of carbon fibers |
| 09/01/1983 | WO1983002964A1 Method for reusing waste hot spun fibers |
| 08/31/1983 | EP0087133A2 Process for utilizing waste from melt-spun fibres |
| 04/12/1983 | CA1144319A1 Process for producing regenerated cellulosic articles and for recovering the solvent chemicals |
| 12/22/1982 | EP0067387A2 Integrated process for the production of textured multifilament yarn |
| 03/09/1982 | US4319023 Process for producing regenerated cellulosic articles and for recovering the solvent chemicals |
| 07/15/1981 | EP0032007A2 Method for the regeneration of acid in the manufacture of regenerated cellulose |
| 11/18/1980 | CA1090046A1 Fabric dye stripping, separation and recovery of polyester |
| 05/06/1980 | US4201740 Treatment with sulfide ion |
| 12/04/1979 | US4177111 Process for the recovery of dimethylacylamides |
| 12/26/1978 | US4131661 Waste asbestos recovery from production of asbestos products |
| 08/01/1978 | US4104341 Utilization of constituents of effluent from the manufacture of styrene bead polymers in the manufacture of fibrids |
| 09/20/1977 | US4049775 Method for purifying waste air from sulphuric gases, particularly in the production of viscose fibres |
| 06/14/1977 | US4029725 Nonoxidative process for purifying aqueous inorganic salt solutions employed in the wet spinning of filamentary vinyl polymers |