1
John D Hottovy, David H Burns, Scott E Kufeld, Timothy Roetman, Ragavan Vaidyanathan: Diluent slip stream to give catalyst wetting agent. Phillips Petroleum Company, Polly C Owen, July 17, 2001: US06262191 (248 worldwide citation)

A process and apparatus for passing a polymerization effluent, comprising solid polymer, unreacted monomer, diluent and minor amounts of contaminants, to a high pressure flash where most of the fluid components are flashed and wherein a slip stream comprising diluent and minor amounts of monomer is ...


2
David H Burns, William E Martin: Method for controlling removal of polymerization reaction effluent. Phillips Petroleum Company, George E Bogatie, October 3, 1995: US05455314 (236 worldwide citation)

In withdrawing a reaction slurry from a polymerization reactor wherein solid particles in the slurry must be maintained in solution to prevent solidification, a redundant effluent line is provided to remove the slurry in the event the primary line becomes plugged. In use the primary and redundant li ...


3
Lorilee S Arakaki, Eric Feigl, Martin J Kushmerick, David Marble, David H Burns, Kenneth H Schenkman: Real-time in-vivo measurement of myoglobin oxygen saturation. Wisconsin Alumni Research Foundation, Greenlee Winner & Sullivan P C, August 3, 1999: US05931779 (58 worldwide citation)

A method for determining myoglobin oxygen fractional saturation in vivo in muscle tissue and intracellular oxygen tension (pO.sub.2), typically in the presence of hemoglobin, is provided. The method comprises measuring the absorption spectrum of the tissue using spectrographic equipment known to the ...


4
David H Burns, William E Martin: Apparatus for controlling removal of polymerization reaction effluent. Phillips Petroleum Company, George E Bogatie, October 15, 1996: US05565174 (37 worldwide citation)

In withdrawing a reaction slurry from a polymerization reactor wherein solid particles in the slurry must be maintained in solution to prevent solidification, a redundant effluent line is provided to remove the slurry in the event the primary line becomes plugged. In use the primary and redundant li ...


5
Donald W Verser, David H Burns, James E Hein, George K Rajaendran, John D Hottovy: Continuous withdrawal from high solids slurry polymerization. Chevron Phillips Chemical Company, Fletcher Yoder, November 9, 2004: US06815511 (35 worldwide citation)

An improved polymerization process includes withdrawing a portion of a fluid slurry through a plurality of active continuous take off mechanisms, monitoring the pressure of feed material fed to the reactor, and adjusting the continuous take off mechanisms in response to the monitored feed line press ...


6
David H Burns, Donald W Verser: Catalyst slurry feeding assembly for a polymerization reactor. Chevron Phillips Chemical Company, Fletcher Yoder, June 21, 2005: US06908971 (30 worldwide citation)

A catalyst slurry for a polymerization reactor can be prepared in a mixing tank and the catalyst slurry fed to one or more storage tanks. The storage tanks can include agitators so that the catalyst slurry is maintained at an essentially homogeneous solids-to-liquid ratio. From the storage tank(s), ...


7
Scott E Kufeld, Thomas A Reid, John H Tait, David H Burns, Donald W Verser, Harvey D Hensley, David J Przelomski, Teddy H Cymbaluk, Robert K Franklin, Ethelwoldo P Perez, John D Hottovy: Slurry polymerization reactor having large length/diameter ratio. Chevon Phillips Chemical Company, April 25, 2006: US07033545 (26 worldwide citation)

A polymerization loop reactor including a loop reaction zone, a continuous takeoff, and a fluid slurry disposed in the reaction zone. A generally cylindrical wall defines the loop reaction zone. The length of the loop reaction zone and the nominal outside diameter of the generally cylindrical wall d ...


8
David H Burns, Donald W Verser: System for removing heavies from diluent recycled to a slurry polymerization reactor. Chevron Phillips Chemical Company, Fletcher Yoder, November 16, 2004: US06818186 (26 worldwide citation)

A recycling and recovery system and process comprising a flash gas separator that receives a slurry comprising liquid medium and solid polymer particles. The flash gas separator separates the diluent from the solid polymer particles as a vapor stream comprising at least diluent and heavies. A line r ...


9
Scott E Kufeld, David H Burns, Ragavan Vaidyanathan: Direct recycle fractionation method using a swing column. Chevron Phillips Chemical Company, McDermott Will & Emery, May 6, 2003: US06559247 (23 worldwide citation)

A process and apparatus for passing a polymerization effluent, comprising solid polymer, unreacted monomer, diluent and minor amounts of contaminants, to a high pressure flash where most of the fluid components are flashed and wherein a slip stream comprising diluent and minor amounts of monomer is ...


10
Thomas A Reid, Scott E Kufeld, John H Tait, David H Burns, Donald W Verser: Process and apparatus for separating diluent from polymer solids. Chevron Phillips Chemical Company, Fletcher Yoder, January 4, 2005: US06838531 (22 worldwide citation)

Polymer solids are maintained in an intermediate pressure zone for a desired polymer solids residence time and then transferred to a purge zone or other lower pressure zone. An increase in the polymer solids residence time in the intermediate pressure zone allows more diluent to flash or separate, t ...