Targor Gmbh

Hostalen Polyethylen Gmbh

Paul-Richard Sch&ouml;neborn

Volker Dolle

Joachim Berthold

Herbert Terwyen

Ludwig B&ouml;hm

Rainer M&uuml;nnig

Johannes Friederich Enderle

Eduardo Chicote Carrion

A gaseous mixture of steam and air, a gaseous mixture of steam and nitrogen, or pure steam are passed around polyolefin granules in a deodorizing apparatus. The result is that the polyolefin granules have markedly improved properties with respect to odor and taste, and these are retained in moldings produced from the granules.

Method for deodorizing polyolefin granulates

The novel process for preparing ethylene copolymers by polymerizing ethylene with, as comonomer, up to 10% by weight, based on the total amount of the monomers, of a 1-olefin of the formula R&mdash;CH&boxH;CH,, where R is a straight-chain or branched alkyl radical having from 1 to 4 carbon atoms, is carried out in a polymerization reactor and in suspension with a dispersion medium at a temperature of from 20 to 100&deg; C. and a pressure of from 2 to 20 bar, in the presence of a catalyst. The dispersion medium is then separated from the polymer. After carrying out the polymerization, but before removing the dispersion medium from the polymer, the suspension stream is partly evaporated, with the result that some of the wax formed in the polymerization is adsorbed onto the polymer and the resultant vapor stream is fed directly into the reactors after condensation or back into the process after distillative removal of the comonomer.

Suspension polymerization for preparing polyolefins

Growing community of inventors

Kriftel, Germany

Paul-Richard Schöneborn

Growing community of inventors

Kriftel, Germany

Paul-Richard Sch&ouml;neborn

Paul-Richard Schöneborn