Ici Australia Limited

Commonwealth Scientific and Industrial Research Organisation

Keith Moody

Thomas Mole

The invention concerns a process for the removal of catalyst residues from a gas by contacting the gas with particulate mineral oxides. The process of the invention may be applied to the removal of coordination catalyst residues from .alpha.-olefins recycled from a polymerization reactor. The process is particularly useful in the removal of alkylaluminium halides and hydrogen halides, such as diethylaluminium chloride and hydrogen chloride, from .alpha.-olefins such as propylene. The process offers the advantages of being able to be operated under anhydrous conditions, and combining high efficiency in the removal of low levels of catalyst residues with a high capacity for the catalyst residues.

Removal of catalyst residues from a gas

A peptide amide derivative of general formula (I) wherein when X is Gly, Y is Leu and Z is .beta.-Ala-NH.sub.2 or Sar-NH.sub.2 ; when X is D-Ala, Y is Leu, Ile, Nle, Val, Nval, or Met and Z is Gly-NH.sub.2, .beta.-Ala-NH.sub.2 or Sar-NH.sub.2, provided that when X is D-Ala and Y is Leu Z is not Gly-NH.sub.2 ; and when X is .beta.-Ala, Y is Leu, Ile, Nle, Val, Nval or Met and Z is Gly-NH.sub.2, .beta.-Ala-NH.sub.2, Sar-NH.sub.2 or -NRR' wherein R and R', which may be the same or different, are H, lower alkyl containing from 1 to 6 carbon atoms, substituted lower alkyl containing from 1 to 6 carbon atoms, or together may form a ring; or a pharmaceutically acceptable acid-addition salt or metal-ion complex thereof; and an inert carrier therefor.

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Watsonia, Australia

Keith Moody