Patent ID: 6383396
Filing Date: 2002-05-07
Classification: B01D,B01J,C02F

Abstract:
A method for absorbing contaminants which comprises contacting a contaminant with an absorbent which contains at least one cycloolefin copolymer which contains polymerized units which are derived from at least one cyclic olefin and at least one acyclic olefin and said at least one cycloolefin copolymer contains 30 to 99% by weight, based on the total weight of the cycloolefin copolymer, of polymerized units which are derived from one or more polycyclic olefins of the formulae I, II, III, IV, V or VI in which R1, R2, R3, R4, R5, R6, R7 and R8 are identical or different and are a hydrogen atom or a C1-C20-hydrocarbon radical or form a ring, where the same radicals R1 to R8 in the various formula I to VI can have a different meaning, and 0.1 to 99% by weight, based on the total weight of the cycloolefin copolymer, of polymerized units which are derived from one or more acyclic olefins of the formula VII in which R9, R10, R11 and R12 are identical or different and are a hydrogen atom or a C1-C20-hydrocarbon radical and the cycloolefin copolymer further contains 5 to 80% by weight, based on the total weight of the cycloolefin copolymer, of polymerized units which are derived from one or more monocyclic olefins of the formula VIII in which n is a number from 2 to 10.