Page 9 - Adsorption Technology & Design, Elsevier (1998)
P. 9
6 The development of adsorption technology
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90
80
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e 70
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40 I---
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1975 1980 1985 1990 1995
Year
Figure I.I Growth of patents relating to PSA processes (adopted from Sircar, 1991).
Until relatively recently, chromatographic processes have been confined
to the laboratory for purposes of the analysis of gaseous and liquid mixtures.
The pharmaceutical industry has also utilized the principles of
chromatography for preparing batches of pharmaceutical products. Elf-
