摘要 |
Polytetrahydrofuran, tetrahydrofuran copolymers, diesters or monoesters of these polymers are prepared by polymerizing tetrahydrofuran in the presence of at least one telogen and/or comonomer on a heterogeneous carrier catalyst which contains on an oxidic carrier material as active mass a catalytically active amount of at least one oxygenous molybdenum and/or tungsten compound and, when the precursor compounds of the active mass have been applied to the carrier material precursor, has been calcined at temperatures of between 500 DEG C and 1000 DEG C. The catalyst used contains a promotor which comprises at least one element or a compound of an element of the 2nd, 3rd including the lanthanides, 5th, 6th, 7th, 8th or 14th group of the periodic system of elements. |
申请人 |
BASF AG, 67063 LUDWIGSHAFEN, DE |
发明人 |
ELLER, KARSTEN, DR., 67059 LUDWIGSHAFEN, DE;CHRISTOPH, SIGWART, DR., 69198 SCHRIESHEIM, DE;BECKER, RAINER, DR., 67098 BAD DUERKHEIM, DE;PLITZKO, KLAUS-DIETER, DR., 67117 LIMBURGERHOF, DE;FISCHER, ROLF, DR., 69121 HEIDELBERG, DE;STEIN, FRANK, DR., 67098 BAD DUERKHEIM, DE;MUELLER, ULRICH, DR., 67434 NEUSTADT, DE;HESSE, MICHAEL, DR., 67549 WORMS, DE |