Matches 1 - 36 out of 36


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US20150175719 POLYOLEFIN REACTOR SYSTEM HAVING A GAS PHASE REACTOR  
A system and method for polymerizing olefin in a gas phase reactor into a polyolefin in presence of catalyst, measuring static charge in the reactor system; determining an indication of polyolefin...
US20140088271 Methods for Controlling Dual Catalyst Olefin Polymerizations  
Methods for controlling the weight ratio of a higher molecular weight component to a lower molecular weight component of an olefin polymer are disclosed. This weight ratio can be increased as...
US20110009575 Semi Continuous Operational Method For Producing Copolymers  
The invention relates to a process for the preparation of a copolymer in a semicontinuous mode of operation in a polymerization apparatus containing a polymerization reactor connected to a...
US20120041159 Systems and Methods for Monitoring a Polymerization Reaction  
Systems and methods for monitoring a polymerization reactor are provided. The method can include estimating an acoustic condition of a polymer produced in a reactor. The method can also include...
US20130267666 Additive for Polyolefin Polymerization Processes  
A polymerization process is disclosed comprising polymerizing an olefin to form an olefin-based polymer in a polymerization reactor; and introducing a polyetheramine additive to the polymerization...
US20120296054 METHOD FOR QUANTITATIVE ANALYSIS OF STYRENE MICROBLOCK CONTENT  
A method for determining the styrene microblock content of a copolymer sample, the method comprising: (i) pyrolyzing the copolymer sample to form polymer fragments of the polymer sample; (ii)...
US20110230627 METHOD FOR OPTIMISING THE SUPPLY OF CATALYST SLURRY TO A POLYMERIZATION REACTOR  
The present invention relates to a method for optimizing the supply of a catalyst slurry during a polymerization process for preparing a polyolefin in a polymerization reactor (1), whereby said...
US20100016522 Method for the Continuous Production of Water Absorbent Polymer Particles  
A process for continuously preparing water-absorbing polymer beads, comprising the drying of a polymer gel on a forced-air belt dryer, the water content of the polymer gel being used to control...
US20120041158 Method for Monitoring Monomer Concentration In Interfacial Polycarbonate Manufacturing Process  
The present invention relates to an improved process for online measurement of monomer concentration, specifically bisphenol A, in an interfacial polycarbonate manufacturing process. Wherein the...
US20120322956 Process for the preparation of ethylene homopolymers or copolymers in a high-pressure reactor controlled by a model based predictive controller  
Process for the preparation of ethylene homopolymers or copolymers in the presence of free-radical polymerization initiator at from 100° C. to 350° C. and pressures in the range of from 160 MPa to...
US20130123440 METHOD OF CONTROLLING A POLYMERIZATION REACTOR  
Embodiments of the invention provide a method of controlling a gas-phase polymerization process. The method includes determining a difference between a control variable of the polymerization...
US20120322957 OPERATION OF MULTI-REACTOR POLYOLEFIN MANUFACTURING PROCESS  
The invention relates to an improved process for manufacturing an olefin polymer composition, in particular polyethylene, that incorporates two or more reaction zones in an optimized configuration...
US20100036064 SEMIBATCH COPOLYMERIZATION PROCESS FOR COMPOSITIONALLY UNIFORM COPOLYMERS  
This invention relates to semi-batch type copolymerization processes. More specifically, the processes of the present invention are directed to the production of compositionally uniform...
US20100286346 Method for On-Line Determination of Degree or Onset of Resin Stickiness Using Acoustic Data  
Provided is a method for monitoring a polymerization reaction in a fluid bed reactor to determine in on-line fashion a current value, and preferably also a limiting value, of a stickiness control...
US20090018279 Method for controlling sheeting in gas phase reactors  
Embodiments of the present invention relate to measuring and controlling static in a gas phase reactor polymerization. In particular, embodiments relate to monitoring carryover static in an...
US20090048406 PROCESS FOR PREPARING CONTINUOUSLY VARIABLE-COMPOSITION COPOLYMERS  
A continuously variable composition copolymer is prepared in a reaction system, by (a) providing a reaction vessel comprising a first monomer composition; (b) providing a feed vessel comprising a...
US20100144982 Polyolefin Production Using High Olefin Concentration  
Methods for polymerization of an olefin monomer and polymers formed therefrom are described herein. The methods generally include introducing an olefin monomer and a diluent carrier liquid into a...
US20090234081 POLYMERIZATION REACTION MONITORING WITH DETERMINATION OF INDUCED CONDENSING AGENT CONCENTRATION FOR PREVENTING DISCONTINUITY EVENTS  
A method for monitoring a polymer resin-producing polymerization reaction in a fluid bed reactor, including by determining in on-line fashion a maximum diluent (e.g., ICA) concentration and an...
US20100160578 PROCESS FOR CONTROLLING REACTION STOICHIOMETRY DURING POLYMERIZATION OF THERMOPLASTIC RESINS  
The present invention provides a process for measuring and controlling chemical reactions that produce thermoplastic polymers by utilizing a stoichiometry correction during a reaction cycle to...
US20070244271 Method for polymerization reaction monitoring with determination of entropy of monitored data  
In some embodiments, a method of monitoring a resin-producing polymerization reaction in a fluid bed reactor system to generate reaction parameter data in on-line fashion, determining an indicator...
US20080200622 Nmr Method of Determining and Regulating the Composition of Polymer Mixtures in Polymerization  
Method of determining the composition of polymer mixtures comprising defined polymer components of differing mean molar masses Mn, which comprises the steps (a) recording of at least one 1H-NMR...
US20100222526 METHOD FOR PRODUCING A COPOLYMER FOR PHOTORESIST  
The present invention provides a method for production of a copolymer for photoresists in which the bias of the monomer composition ration is small. This method for production is a method for...
US20050228150 Use of instantaneous split to improve reactor control  
A method of manufacturing a polymer composition that includes initiating a polymerization reaction at an initial set of polymerization parameters, determining an instantaneous split of the at...
US20130116391 Method and Apparatus for Monitoring and Restoring Electrical Properties of Polymerization Reactor Wall Film  
Described herein are methods for monitoring and restoring electrical properties of polymerization reactor wall films. The method may comprise using a reactor wall monitor to monitor and determine...
US20100029865 Methods For Monitoring Reactor Passivation For Gas Phase Polymerization  
Methods and system for in-situ measurement of polymer growth within an olefin polymerization reactor are provided. The method includes polymerizing one or more olefins within a reactor at a first...
US20170183427 METHODS FOR CONTROLLING ALUMINUM ALKYL FEED TO A SLURRY POLYMERIZATION PROCESS  
The present disclosure generally relates to a slurry polymerization process for the preparation of polyethylene in the presence of a Ziegler catalyst and aluminum alkyl co-catalyst in at least one...
US20170146499 METHOD OF MONITORING PRODUCTION OF A CHEMICAL PRODUCT AND A CHROMATOGRAPH USED THEREWITH  
A method for monitoring a chromatograph used to control production of a chemical product. The method involves sampling a chemical mixture of chemical components used during the production to form...
US20170081432 PREPARATION OF POLYOLEFIN  
Catalyst systems and methods for making and using the same are provided. The catalyst systems can include a plurality of silica particles and a metallocene catalyst and an activator supported on...
US20170022307 Process for Forming Polyolefins  
Processes of forming polyolefins are described herein. One or more specific embodiments of the processes generally include introducing olefin monomer selected from C2-C3 olefins into a first...
US20170015768 PROCESS CONTROL FOR LONG CHAIN BRANCHING CONTROL IN POLYETHYLENE PRODUCTION  
Polymerization process control methods for making polyethylene are provided. The process control methods include performing a polymerization reaction in a polymerization reactor to produce the...
US20170008983 PRODUCING POLYOLEFIN PRODUCTS  
Catalyst systems and methods for making and using the same are described. A method includes selecting a catalyst blend using a blend polydispersity index (bPDI) map. The polydispersity map is...
US20160325252 System and Method for Catalyst Preparation  
Techniques are provided for catalyst preparation. A system for catalyst preparation may include an agitator disposed inside a polymerization catalyst tank and configured to mix a polymerization...
US20160231230 METHOD FOR MONITORING A CONTROL PARAMETER OF A POLYMERIZATION REACTION AND RELATIVE APPARATUS FOR IMPLEMENTING SAID METHOD  
The present invention relates to a method for monitoring a control parameter of a polymerization reaction mixture in heterogeneous phase comprising the following steps: (a) acquiring at least one...
US20160033470 Methods And Instrumentation For During-Synthesis Monitoring Of Polymer Functional Evolution  
A method of monitoring the evolution of polymer and/or colloid stimuli responsiveness during synthesis of polymers and/or colloids, including postpolymerization modifications on natural and...
US20130203946 Method For Controlling Bubble Formation In Polymerization Reactors  
Disclosed herein are methods for controlling bubble formation in a polymerization reactor. The method includes: (a) determining a concentration of at least one component at a location in the...
US20120316296 Method for Improving a Polymerization Reaction by Taking Out and Analysing a Sample  
The disclosure relates to a device for removing and analyzing a sample from a polymerization reactor including one or more sample conduits for removing a sample from the reactor and transferring...

Matches 1 - 36 out of 36