Zobrazeno 1 - 10
of 129
pro vyhledávání: '"W. H. Ray"'
Autor:
W. H. Ray, S. D. Naik
Publikováno v:
Journal of Applied Polymer Science. 79:2565-2579
A detailed model describing particle growth and morphology in polyolefins synthesized using supported metallocene catalysts is presented. The multigrain model (MGM) is extended to consider metal extraction and the effects of polymer particle compress
Publikováno v:
Chemical Engineering Science. 55:4461-4479
The stability and dynamic behavior of two types of continuous stirred bed reactors (CSBR) has been analyzed. Both the vertical CSBR of BASF and the horizontal CSBR of Amoco are examined. In each case, it is seen that multiple steady states and limit
Publikováno v:
IFAC Proceedings Volumes. 33:207-212
Continuous loop reactors are potential candidates for replacing stirred tanks in the free-radical polymer industry. Loop reactors present attractive advantages such as improved mixing and heat transfer capabilities and their macroscopic behavior is v
Autor:
W. H. Ray, G. C. Han-Adebekun
Publikováno v:
Journal of Applied Polymer Science. 65:1037-1052
Using a high-activity MgCl 2 -supported TiC1 4 catalyst, kinetic studies of ethylene and propylene polymerization are conducted in a semi-batch gas phase stirred-bed reactor system. Based on the experimental observations obtained from this study and
Publikováno v:
Journal of Polymer Science Part A: Polymer Chemistry. 35:2063-2074
This study focuses on the kinetics of ethylene/propylene (homo/co)poly-merization reactions using a high activity TiCl 4 /MgCl 2 /AlEt 3 catalyst. The reactor system is a gas phase reactor equipped with an on-line composition control scheme. As such,
Publikováno v:
Journal of Applied Polymer Science. 64:373-382
A novel lab-scale stirred bed gas phase reactor system has been designed and constructed for investigating the kinetic behaviour of olefin copolymerization reactions using heterogeneous catalysts. The system, equipped for basic temperature and pressu
Publikováno v:
Chemical Engineering Science. 51:4859-4886
Many polyolefins are produced by catalyzed olefin polymerization over solid catalysts. A variety of processes are currently in use including loop, continuous-stirred tank, horizontal stirred bed and fluidized-bed technologies. In each of these contin
Autor:
José Carlos Pinto, W. H. Ray
Publikováno v:
Chemical Engineering Science. 51:63-79
In a previous paper Pinto and Ray (1995, Chem. Engng Sci.50, 715–736) developed a mathematical model to describe the dynamic behavior of continuous free-radical solution copolymerization reactors and validated the model with experimental results ob
Publikováno v:
Physical Review E. 52:2407-2423
Autor:
W. H. Ray, José Carlos Pinto
Publikováno v:
Chemical Engineering Science. 50:715-736
The dynamic behavior of continuous free-radical solution copolymerization reactors was studied, using VA (vinyl acetate) and MMA (methyl methacrylate) as comonomers. Due to the lack of data in the literature, a mathematical model was built and some k