| 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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| 02/27/1997 | WO1997007108A1 Process for the selective separation of morpholine |
| 02/27/1997 | WO1997007059A1 Method of processing an aqueous solution in the amine oxide process |
| 02/27/1997 | CA2202625A1 Process for purifying a tertiary aminoxide aqueous solution |
| 02/27/1997 | CA2202624A1 Process for producing an aqueous amine oxide solution |
| 02/27/1997 | CA2202362A1 Process for re-using an aqueous process fluid from the amine oxide process |
| 02/27/1997 | CA2202347A1 Method of processing an aqueous solution in the amine oxide process |
| 02/27/1997 | CA2202153A1 Process for the selective separation of morpholine |
| 02/19/1997 | CN1143127A internal window frame section produced from rubbish |
| 02/11/1997 | US5602247 Using an ion exchange resin |
| 10/23/1996 | EP0665766B1 Method of purifying aqueous solutions of amine oxides |
| 10/15/1996 | US5565158 Agglomeration, spinning |
| 06/20/1996 | WO1996018761A1 Process for producing cellulosic moldings |
| 06/20/1996 | CA2206990A1 Process for producing cellulosic moldings |
| 06/05/1996 | CN1124044A Process for purifying aqueous solutions of tertiary amino oxides |
| 06/05/1996 | CN1124033A Process for producing cellulose shaped bodies |
| 05/23/1996 | DE4441371A1 Glycol recovery from used glycol-contg. technical fluids |
| 05/17/1996 | CA2154434A1 Process for recycling multicomponent mixed polymer wastes |
| 05/14/1996 | CA2034306C Monomer exhaust system |
| 04/02/1996 | US5503749 Process for the purification of aqueous solutions of amine-oxides |
| 02/14/1996 | EP0696598A1 Polysaccharide esters and their salts |
| 02/14/1996 | EP0696330A1 Process for purifying aqueous solutions of tertiary amino oxides |
| 02/07/1996 | EP0695324A1 Process for producing cellulose shaped bodies |
| 01/17/1996 | EP0692038A1 Preparation of poly(m-phenylene isophthalamide) filaments |
| 11/02/1995 | EP0679739A1 Method for the purification of reclaimed aqueous N-methylmorpholine N-oxide solution |
| 11/02/1995 | EP0679624A1 Recovery of glycols from used glycol-containing technical fluids |
| 11/02/1995 | EP0679169A1 Separation of nylon 6 from mixtures with nylon 6,6. |
| 10/31/1995 | US5462643 Method for reprocessing solvent mixtures containing constituents of low volatility and apparatus suitable therefor |
| 10/26/1995 | DE4414285A1 Cellulose@ material dissolution useful esp. for viscose prodn. |
| 10/11/1995 | EP0614403A4 Process for removing contaminants from polyolefins for recycle. |
| 09/08/1995 | WO1995023885A1 Process for purifying aqueous solutions of tertiary amino oxides |
| 09/08/1995 | WO1995023827A1 Process for producing cellulose shaped bodies |
| 08/15/1995 | US5441689 Purification of aqueous solutions of an amine N-oxide by passage through a strongly basic anion-exchange resin |
| 08/09/1995 | EP0665766A1 Method of purifying aqueous solutions of amine oxides. |
| 07/27/1995 | DE4402194A1 Alkali(ne earth) metal salt sepn. from aq organic aprotic solvent |
| 07/04/1995 | US5429667 Process for the recovery of carbon disulfide from a steam/carbon disulfide mixture |
| 03/02/1995 | WO1995005888A1 Method of purifying aqueous solutions of amine oxides |
| 12/21/1994 | EP0629420A1 Process for working up solvent mixtures containing high boiling components and appropriate device |
| 12/13/1994 | CA2125625A1 Method for reprocessing solvent mixtures containing constituents of low volatility and apparatus suitable therefor |
| 10/13/1994 | WO1994023099A1 Preparation of poly(m-phenylene isophthalamide) filaments |
| 09/28/1994 | EP0616651A1 Method for removal of spinning solvent from spun fiber |
| 09/21/1994 | EP0615556A1 Purifying aqueous solutions of amine-n-oxides |
| 09/14/1994 | EP0614403A1 Process for removing contaminants from polyolefins for recycle |
| 08/23/1994 | US5340519 Preparation of poly(m-phenylene isophthalamide) filaments |
| 08/18/1994 | DE4304510A1 Process for recovering carbon disulphide from a water vapour/carbon disulphide mixture |
| 08/09/1994 | US5336767 Total or partial esters of hyaluronic acid |
| 07/27/1994 | EP0548134B1 Solvent vapor containment system |
| 07/21/1994 | WO1994016004A1 Separation of nylon 6 from mixtures with nylon 6,6 |
| 04/05/1994 | US5300229 Process for removing colored components from solvent for polyacrylonitrile |
| 01/18/1994 | US5280105 Using aqueous solution of alphalic carboxylic acid |
| 11/30/1993 | US5266124 Process for removing contaminants from polyolefins |
| 11/18/1993 | DE4215349A1 Moulded articles prodn. e.g. sheets - by granulating waste materials contg. polyester fibres or glass and three=stage pressing |
| 09/29/1993 | CN1076737A Process for removing colored components from solvent for polyacrylonitrile |
| 08/18/1993 | EP0556003A1 Process for removing colored components from solvent for polyacrylonitrile |
| 07/27/1993 | US5230854 Method for removal of spinning solvent from spun fiber |
| 06/24/1993 | WO1993012276A1 Method for removal of spinning solvent from spun fiber |
| 06/15/1993 | US5219585 Monomer exhaust system |
| 06/10/1993 | WO1993011287A1 Purifying aqueous solutions of amine-n-oxides |
| 06/10/1993 | WO1993010916A1 Process for removing contaminants from polyolefins for recycle |
| 05/25/1993 | US5213745 Extraction solvent such as a polyether |
| 04/14/1993 | CN1070961A Acid made technology by utilizing acid bath evaporating secondary steam |
| 01/12/1993 | US5178764 Process for cleaning or purifying aqueous n-methylmorpholine-n-oxide solutions |
| 01/07/1993 | DE4121300A1 Spinning bath vapour condensing - uses the spinning bath to cool the recirculation sulphuric acid used for water condensation |
| 09/08/1992 | US5145569 Process for desalting solvent-containing electrolyte solutions by electrodialysis |
| 08/26/1992 | CN1063910A Reuse technology of leftover bits and pieces of silk knitting |
| 06/16/1992 | US5122321 Method for disposing of gaseous monomer |
| 06/03/1992 | EP0488988A1 Process for purifying aqueous solutions of N-methyl-morpholine N-oxide |
| 06/02/1992 | US5118423 Method of removing water from a dilute solution of n-methylmorpholine-n-oxide, n-methylmorpholine, or morpholine |
| 03/19/1992 | WO1992004487A1 Solvent vapor containment system |
| 02/18/1992 | US5088913 Apparatus to dispose of gaseous monomer |
| 01/29/1992 | EP0468951A1 Process for separating aminooxides from aqueous solutions |
| 12/26/1991 | WO1991019840A1 Apparatus to dispose of gaseous monomer |
| 12/24/1991 | US5075049 Method for improving solvent containment |
| 11/27/1991 | EP0294366B1 Apparatus and method to extract material from a running length of fiber |
| 10/02/1991 | EP0448924A1 Process for separating water from a diluted aqueous solution of N-methylmorpholine-N-oxide, N-methylmorpholine and/or morpholine |
| 10/01/1991 | US5053138 Anion exchange resin; one step process, no loss of n-methyl-morpholine n-oxide; acidic regeneration of resin |
| 08/28/1991 | EP0443207A2 Monomer exhaust system |
| 05/15/1991 | EP0427701A1 Process for purifying aqueous solutions of N-methyl-morpholine N-oxide |
| 05/08/1991 | CN1012581B Technique for renewing used cotton |
| 04/17/1991 | CA2027513A1 Process for purifying an aqueous solution of n-methyl-morpholine n-oxide |
| 12/18/1990 | US4978492 Flow of solvent countercurrent to flow of fiber; continuous processing |
| 10/23/1990 | US4965353 Polysaccharide esters and their salts |
| 08/08/1990 | EP0381134A1 Electrodialytic desalination process of electrolyte solutions having solvents |
| 08/02/1990 | CA2009140A1 Process for desalting solvent-containing electrolyte solutions by electrodialysis |
| 07/31/1990 | CA1272003A1 Apparatus and method to extract material from a running length of fiber |
| 03/15/1990 | DE3829920A1 Process for recovering carbon disulphide from spinning baths |
| 01/03/1990 | CN1038471A Technique for renewing used cotton |
| 07/25/1989 | US4851521 Esters of hyaluronic acid |
| 03/29/1989 | CN1032043A Catalyst for hydrolysis of adipamide waste material and method thereof |
| 11/29/1988 | CA1245597A1 Process for the concentration of sulfuric acid |
| 09/20/1988 | US4771616 Apparatus and method to extract material from a running length of fiber |
| 06/15/1988 | CN85109341B Mechanical compress type evaporating concentrating apparatus |
| 06/07/1988 | US4749496 Filtration through open cell foam containing active powdered materials |
| 05/03/1988 | CA1236095A1 Cyclic process for producing alkali solution of cellulose carbamate, precipitating the carbamate and recovering the chemicals |
| 05/03/1988 | CA1236094A1 Cyclic process for producing alkali solution of cellulose carbamate, precipitating the carbamate and recovering the chemicals |
| 03/02/1988 | EP0257130A1 Evaporation process |
| 10/21/1987 | EP0241564A1 Process and apparatus for the mixed condensation of vapours |
| 09/11/1987 | WO1987005341A1 Apparatus and method to extract material from a running length of fiber |
| 04/01/1987 | EP0216453A2 Esters of hyaluronic acid and their salts. |
| 01/28/1987 | EP0209789A2 Method of separating pollutants from water-solvent mixtures |
| 01/27/1987 | US4639515 Recovery and reuse of chemicals |