Title:
イソブテンの重合する際の未反応のイソブテンの分離
Document Type and Number:
Japanese Patent JP4197954
Kind Code:
B2
Abstract:
A method for removing unreacted isobutene from cationic polymerisation involves heating the reaction product and/or the liquid phase from flash evaporation so that the rate of evaporation is not more than 900 m<3>/h/m<2> liquid surface and then separating the foam into gas and liquid by directing it against a baffle or through a circulating loop. A method for working up a liquid reaction product from the cationic polymerisation of isobutene, mainly comprising polyisobutene (PIB), unreacted isobutene and optionally inert diluent, by taking off a vapor phase containing unreacted isobutene. The method involves (a) heating the reaction product and depressurizing it to give a PIB-containing liquid phase and a vapor phase, and/or (b) heating the reaction product and/or the liquid phase from (a) so that the amount of vapor evaporated per m<2> of liquid surface is not more than 900 m<3>/hour, and/or (c) separating the foam produced by evaporation into gaseous and liquid components by directing it against a baffle or passing it through a circulating loop.
More Like This:
Inventors:
Heinz Auer
Ulrich Canne
Andred Vaud
Jurgen Ziprian
Ulrich Canne
Andred Vaud
Jurgen Ziprian
Application Number:
JP2002582094A
Publication Date:
December 17, 2008
Filing Date:
April 10, 2002
Export Citation:
Assignee:
BASF SE
International Classes:
C08F6/10; C08F6/00; C08F10/00
Domestic Patent References:
| JP59166506A |
Foreign References:
| US3280091 | ||||
| US4537954 |
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel