Liquid purification or separation – Processes – Chromatography
Patent
1990-06-25
1992-01-14
Dawson, Robert A.
Liquid purification or separation
Processes
Chromatography
73 611C, 2101982, 210635, 264184, B01D 1508
Patent
active
050807986
ABSTRACT:
There are provided methods for monitoring the oligomeric content of prepolymers and polymers, which methods employ high-performance liquid chromatographic techniques. Typically, the methods of the present invention may be used to determine the oligomeric content of polyethylene terephthalate polymers and prepolymers.
REFERENCES:
patent: 4147552 (1979-04-01), Specht et al.
patent: 4352745 (1982-10-01), James et al.
patent: 4895660 (1990-01-01), Kershner et al.
patent: 4968471 (1990-11-01), Ito et al.
Snyder, L. R. and Kirkland, J. J., Introduction to Modern Liquid Chromatography, New York, 1979 pp. 552-554.
Amoco Corporation
Blumberg Gunar J.
Dawson Robert A.
Kim Sun Uk
Magidson William H.
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