| Patent Number |
Title Of Patent |
Date Issued |
| 6355831 |
Process for preparing pentenoic esters from formylvaleric esters using a mixed oxide supported n |
March 12, 2002 |
| The present invention provides a process for preparing a pentenoic ester, comprising heating a 3-, 4-formylvaleric ester or mixtures thereof at 50.degree. C. to 400.degree. C. in the presence of a supported noble metal catalyst. The noble metal catalyst is supported on a mixed oxide |
| 6143884 |
Manufacturing process of cellulose viscose with low viscosity |
November 7, 2000 |
| A manufacturing process of cellulose solution with low viscosity includes the step of dissolving a cellulose in a mixture solvent which is produced by mixing an additional solvent mixture, N-methylol caprolactom, with a main solvent, N-methyl morpholine oxide. The present invention not o |
| 6100360 |
Process for preparing a polyurethane elastic fiber |
August 8, 2000 |
| A polyurethane elastic fiber is prepared from a polyurethane prepolymer by reaction extruding the polyurethane prepolymer and a chain extender, preferably with twin-screw extruder, and melt spinning the resulting polyurethane elastomer from the extrusion. The polyurethane prepolymer is |
| 5977356 |
Process for preparing caprolactam |
November 2, 1999 |
| A simple and single step process for producing caprolactam comprising reacting 5-formylvaleric acid or an ester thereof in a solvent of water and/or an alcohol with hydrogen and ammonia in the presence of a noble metal catalyst supported by a carrier at 80.degree. to 300.degree. C. u |
