USE OF A STAINLESS STEEL METAL CLOTH FOR FILTRATION OF POLYOLEFIN CATALYST
Publication Date: 2004-Sep-27
The IP.com Prior Art Database
In traditional olefin catalyst manufacture, a Funda filter using a 20 micron TEFLON® cloth has been used to capture catalysts and separate them from solvents during manufacture. A stainless steel cloth with the same 20 micron can serve the same function. Filtration rates using the stainless steel cloth increased from 20% to 250%, depending on the manufacturing stage and the catalyst being manufactured. These improved filtration rates enhance the overall capture efficiency of the filter and thus increase the unit's production rate. Further, the increased filtrate flow rate may allow batch cycle times to be reduced by 3-10%. The improved capture efficiency may also allow the scale-up of catalyst systems to larger batch sizes. The higher filtrate flow rates have also enabled the reduction of residual solvents such as monochlorobenzene from the catalysts. This decrease in residual solvent allows for more removal during the washing step and thus a purer product.