Patent application number | Description | Published |
20080234447 | Polydispersity-controlled isoolefin polymerization with polymorphogenates - The disclosure provides for a process and polymerization system to produce isoolefin polymers ( | 09-25-2008 |
20080262180 | Separation of polymer slurries - Methods for producing elastomers or elastomeric compositions are provided. One or more C | 10-23-2008 |
20090062484 | Method for Reducing Depositions in Polymerization Vessels - The method of polymerization includes the steps of a) providing a catalyst system, b) providing at least one monomer or comonomer mixture in a reaction vessel, c) introducing the catalyst into the reaction vessel, and d) polymerizing the at least one monomer or comonomer mixture to produce an isoolefin polymer. The catalyst may be soluble in the diluent used for polymerization. The polymerization contact surfaces of the reaction vessel have an arithmetic average surface roughness of less than 0.3 μm (12 microinches). | 03-05-2009 |
20090062496 | Method for Reducing Depositions in Polymerization Vessels - Provided is a method for reducing depositions in polymerization vessels, where the method includes the steps of providing a reaction vessel having polymerization contact surfaces, polishing a majority of the polymerization contact surfaces to have an average percent excess surface areas (SAxs) of 2% or less, introducing a catalyst system and at least one monomer or comonomer mixture in the reaction vessel, and polymerizing the at least one monomer or comonomer mixture. The catalyst may be soluble in the diluent used for polymerization. The method may be useful for low temperature polymerization systems. | 03-05-2009 |
20100059441 | Ethanol stable epoxy amine based membrane for aromatics separation - The present invention is directed to a membrane for aromatics separation that is stable in an alcohol containing environment. The polymeric membrane is a epoxy amine based membrane. | 03-11-2010 |
20100108605 | Ethanol stable polyether imide membrane for aromatics separation - The present invention relates to a polymeric aromatic selective membrane comprising an cross linked polyether imide membrane that comprise the reaction of a polyether amine with an dianhydride, and that may be utilized in a process for selectively separating aromatics from a hydrocarbon feedstream comprised of aromatic and aliphatic hydrocarbons and at least one alcohol, typically ethanol. | 05-06-2010 |
20110111950 | Polydispersity-Controlled Isoolefin Polymerization With Polymorphogenates - The disclosure provides for a process and polymerization system to produce isoolefin polymers ( | 05-12-2011 |
20110294924 | Methods of Production of Alkylstyrene/Isoolefin Polymers - Copolymer are formed by polymerizing C | 12-01-2011 |
20120130026 | MITIGATION OF ELASTOMER REACTOR FOULING USING MECHANICAL VIBRATION - Method of reducing fouling in an elastomer polymerization process that includes providing a reactor capable of housing an industrial-scale elastomer polymerization reaction, and applying a mechanical force to the reactor so as to create a vibration in at least one wall of the reactor, in which fouling is reduced in the reactor. In one embodiment the reaction is an industrial scale butyl polymerization reaction and the reactor is a butyl polymerization reactor. | 05-24-2012 |
20120270958 | Ethanol Stable Polyether Epoxy Based Membrane for Aromatics Separation - The present invention is directed to a membrane for ethanol and aromatics separation that is stable in an alcohol containing environment. The membrane is a polyether epoxy resin having an aliphatic substituted epoxide. The invention also teaches a method to control the flux and selectivity of the membrane. | 10-25-2012 |