Foerfarande och apparatus foer provtagning

摘要

PCT No. PCT/FI96/00270 Sec. 371 Date Nov. 10, 1997 Sec. 102(e) Date Nov. 10, 1997 PCT Filed May 13, 1996 PCT Pub. No. WO96/35936 PCT Pub. Date Nov. 14, 1996A method and apparatus for taking a sample from a flowing suspension formed by polymer particles and hydrocarbon diluent in a olefin polymerization process including at least one filter situated at a plane of an inside surface of a transfer conduit between reactors. Each filter includes perforations or pores having a size to prevent substantially any of the catalyst used in the polymerization process from passing through the filter, e.g., smaller than the smallest particle size of a catalyst used in the polymerization process. The pore or perforation size of each filter is preferably 0.1-10 mu m, preferably between 0.2-1 mu m. A pressure difference permits at least partial vaporization of the sample as it passes through the filter.