Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymerizing in tubular or loop reactor
Patent
1990-10-09
1991-12-10
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymerizing in tubular or loop reactor
526106, 526 75, 5263485, C08F 214, C08F 424
Patent
active
050719270
ABSTRACT:
This invention relates to a high-temperature slurry polymerization of ethylene where: the hexene is generated in situ; a chromium catalyst system is used; a trialkyl boron or a polyalkyl silane compound is used as a cocatalyst; the temperature of the reaction is above the foul curve temperature for a specific copolymer density; and where the polymerization takes place in a continuous loop reactor which has isobutane as a diluent. Additionally, hexene can be withdrawn, or added, to adjust the density.
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Modern Plastics Encyclopedia, Oct. 1990, p. 54: "High Density Polyethylene".
J. P. Hogan et al. (1981), J. Appl. Polymer Sci: Applied Polymer Symposium 36, 49-60: "Phillips Petroleum Company Loop Reactor Polyethylene Technology".
Benham Elizabeth A.
McDaniel Max P.
McElvain Robert R.
Schneider Roy O.
Corvin Carl D.
Nagumo M.
Phillips Petroleum Company
Schofer Joseph L.
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