Patent application number | Description | Published |
20080214762 | Method for the Production of High-Grade Polyisobutene - The present invention relates to a process for preparing polyisobutenes by polymerizing isobutene in the presence of a Lewis acid catalyst in liquid organic phase, terminating the reaction by admixing the organic phase with an aqueous terminator in a dynamic mixer which has a rotationally symmetric mixing chamber formed from one circumferential wall and two end walls, and a mixing rotor driven such that it rotates therein, the organic phase being introduced through a first inlet orifice provided in the circumferential wall and the aqueous terminator via a second inlet orifice provided in the circumferential wall, and removing a finely dispersed mixture of the organic phase and of the terminator through an outlet orifice provided in the circumferential wall and feeding it to a phase separation. The process serves to prepare high-reactivity polyisobutenes and/or polyisobutenes with narrow molecular weight distribution. | 09-04-2008 |
20080214763 | Method For Producing Polyisobutene - The present invention relates to a process for preparing polyisobutene by polymerizing isobutene using an inert diluent and a halogen-containing Lewis acid as a catalyst, wherein the isobutene in the form of droplets is contacted with the Lewis acid in a polymerization apparatus. | 09-04-2008 |
20080249268 | Method For Producing a Polyisobutene - The invention relates to a process for preparing polyisobutene having a mean molecular weight M | 10-09-2008 |
20080269426 | Method for Producing a Polyalkenyl Amine - The present invention relates to a process for preparing a polyalkenylamine, in which the solvent used for the reaction is exchanged for a different solvent. | 10-30-2008 |
20090023882 | PROCESS FOR PREPARATION OF POLYISOBUTYLENE WHOSE CONTENT OF TERMINAL DOUBLE BONDS IS MORE THAN 50% FROM AN INDUSTRIAL C4 HYDROCARBON STREAM COMPRISING 1-BUTENE, 2-BUTENE AND ISOBUTENE - Preparation of polyisobutylene having a content of terminal double bonds of more than 50% by polymerizing isobutene using a polymerization catalyst customary therefor from a technical 1-butene-, 2-butene- and isobutene-containing C | 01-22-2009 |
20100137643 | METHOD FOR SYNTHESIZING CYCLOHEXYL-SUBSTITUTED PHOSPHINES - The present invention relates to a process for preparing cyclohexyl-substituted phosphines. The invention further relates to a process for preparing cyclohexyl-substituted phosphine oxides which can be used as intermediates in the preparation of cyclohexyl-substituted phosphines. | 06-03-2010 |
20110028666 | PROCESS AND APPARATUS FOR CONTINUOUSLY POLYMERIZING CATIONICALLY POLYMERIZABLE MONOMERS - The present invention relates to a process and to an apparatus for continuous living polymerization of cationically polymerizable monomers, in which at least three feedstocks are mixed in one or more mixers with microstructures and then polymerized in at least one reaction zone. | 02-03-2011 |
20130041121 | PROCESS FOR PREPARING HIGH-REACTIVITY ISOBUTENE HOMO- OR COPOLYMERS - Preparation of high-reactivity isobutene homo- or copolymers with a content of terminal vinylidene double bonds per polyisobutene chain end of at least 50 mol % by polymerization of isobutene or isobutene-comprising monomer mixtures in the presence of Lewis acids suitable as polymerization catalysts or of complexes which are effective as polymerization catalysts and are formed from Lewis acids and donors, and in the presence of initiators, wherein the initiators used are organic sulfonic acids Z—SO | 02-14-2013 |
20130102748 | PROCESS FOR PREPARING ISOBUTENE HOMOPOLYMERS OR COPOLYMERS - Preparation of isobutene homopolymers or copolymers having a number average molecular weight of from 500 to 5 000 000 by polymerization of isobutene or an isobutene-comprising monomer mixture in the presence of a Lewis acid or a complex comprising a Lewis acid as polymerization catalyst, wherein the polymerization is carried out in the presence of at least one hemiacetal or full acetal which can be obtained by protic acid-catalyzed reaction of at least one C | 04-25-2013 |
20130178679 | PROCESS FOR CONTINUOUSLY PREPARING POLYISOBUTYLENE - Continuous preparation of polyisobutylene having a content of terminal double bonds of more than 50% by polymerizing isobutene in the presence of a polymerization catalyst customary therefor, by combining a technical 1-butene-, 2-butene- and isobutene-containing C | 07-11-2013 |
20130217847 | PROCESS FOR PREPARING HIGHER MOLECULAR WEIGHT POLYISOBUTYLENE - Preparation of isobutene homopolymers having a weight-average molecular weight of 75 000 to 10 000 000 by polymerization of isobutene, by
| 08-22-2013 |
20130217848 | BORON TRIFLUORIDE-CATALYST COMPLEX AND PROCESS FOR PREPARING HIGH-REACTIVITY ISOBUTENE HOMOPOLYMERS - A catalyst complex composed of boron trifluoride and a cocatalyst mixture of 10 to 90% by weight of a monohydric primary C | 08-22-2013 |