Polymerisation Processes Polymerisation Processes Polyethylene ...
Polymerisation Processes Polymerisation Processes Polyethylene ...
Polymerisation Processes Polymerisation Processes Polyethylene ...
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High Pressure <strong>Polyethylene</strong> <strong>Processes</strong><br />
High pressure process<br />
in one phase region<br />
low pressure process in<br />
two phase region<br />
Dr. Klaus-Dieter Hungenberg, BASF AG Ludwigshafen Vorlesung <strong>Polymerisation</strong>stechnik, Universität Paderborn, WS 07/08 Polymer processes<br />
R2<br />
Side Reactions inHigh Pressure <strong>Polyethylene</strong><br />
R1<br />
Chain scission – unsaturated chains<br />
R1 CH 2 CH CH 2 R2<br />
Intermolecular transfer to polymer – long chain branching<br />
CH CH 2<br />
2<br />
CH C<br />
2<br />
H2 +<br />
CH CH CH CH 2<br />
2<br />
2<br />
2<br />
CH CH CH R3<br />
2<br />
2<br />
2<br />
R2<br />
R1<br />
CH CH 2<br />
2<br />
CH CH 2<br />
3<br />
Dr. Klaus-Dieter Hungenberg, BASF AG Ludwigshafen Vorlesung <strong>Polymerisation</strong>stechnik, Universität Paderborn, WS 07/08 Polymer processes<br />
+<br />
CH CH C<br />
2<br />
2<br />
CH CH H<br />
2<br />
2<br />
CH 2<br />
n<br />
CH 2<br />
R3<br />
C<br />
H 2<br />
CH 2<br />
R2<br />
H2 C<br />
+<br />
+<br />
R1 CH CH2 R2 H2C<br />
H C CH R2 2 R1 C<br />
C<br />
H 2<br />
H2 C<br />
C<br />
H 2<br />
C<br />
H 2<br />
C<br />
H 2<br />
HC<br />
CH 2<br />
CH 2<br />
C<br />
H 2<br />
H 2<br />
H2 C<br />
R3<br />
9<br />
11<br />
High Pressure <strong>Polyethylene</strong> <strong>Processes</strong><br />
Primary<br />
compressor<br />
Granules<br />
Hyper Compr.<br />
Autoclave<br />
High pressure cycle<br />
150-300 bar<br />
Low pressure<br />
cycle<br />
Extruder<br />
M<br />
alternative<br />
High pressure<br />
separator<br />
Low pressure<br />
separator<br />
T = 200 - 300°C<br />
P = 2000 - 3000 bar<br />
Tubular reactor<br />
Dr. Klaus-Dieter Hungenberg, BASF AG Ludwigshafen Vorlesung <strong>Polymerisation</strong>stechnik, Universität Paderborn, WS 07/08 Polymer processes<br />
Side Reactions inHigh Pressure <strong>Polyethylene</strong><br />
Intramolecular transfer to polymer – short chain branching<br />
R1 CH 2 CH 2 CH<br />
H<br />
CH 2<br />
C<br />
H 2<br />
R1 CH 2 CH 2 CH<br />
R1 CH 2 CH 2 CH<br />
CH 2<br />
CH 2<br />
CH 2<br />
CH H 2<br />
C<br />
H2 CH 2<br />
CH 2<br />
CH 3<br />
C<br />
H 2<br />
CH CH 2 CH 3<br />
CH CH 2 CH 3<br />
R1 CH 2 CH 2 C H<br />
CH 2<br />
n<br />
C<br />
H 2<br />
n<br />
C<br />
H 2<br />
CH 2<br />
Dr. Klaus-Dieter Hungenberg, BASF AG Ludwigshafen Vorlesung <strong>Polymerisation</strong>stechnik, Universität Paderborn, WS 07/08 Polymer processes<br />
CH 2<br />
C<br />
H 3<br />
CH 2<br />
CH 2<br />
CH 2<br />
n<br />
M<br />
C<br />
H 2<br />
CH 2<br />
R1 CH 2 CH 2 CH<br />
CH 2<br />
CH 2<br />
CH 2<br />
CH 3<br />
CH 2 CH 2 CH 2 CH 2 CH 2<br />
R1 CH CH CH CH CH CH CH CH 2 2 2<br />
2 2 2<br />
CH 2<br />
CH 3<br />
CH 2<br />
CH 3<br />
Butyl side groups<br />
Ethyl side groups<br />
10<br />
12
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