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Catalytic polymerization of olefins

Communication 6. Effect of additions of certain metal oxides on the activity of a NiO-Al2O3-silica gel catalyst in the polymerization of ethylene
  • Ya. T. Éidus
  • K. V. Puzitskii
  • B. A. Kazanskii
Article
  • 16 Downloads

Summary

  1. 1.

    An investigation was made of the effect of additions of copper, silver, zinc, magnesium, calcium, barium, thorium, and manganese oxides on an NiO-Al2O3-silica gel (KSK) catalyst.

     
  2. 2.

    An addition of silver, calcium, or barium oxide greatly reduced the activity of the catalyst, but an addition of copper, zinc, manganese, or magnesium oxide had scarcely any effect on the activity. Thorium dioxide reduced the activity slightly.

     
  3. 3.

    An addition of copper, silver, zinc, barium, or manganese oxide considerably increased the selectivity of the catalyst for the dimerization of ethylene. This effect was shown to less extent by additions of magnesium and calcium oxides.

     
  4. 4.

    The catalytic stability of the catalyst was greatly lowered by an addition of magnesium or barium oxide and appreciably lowered by an addition of silver or calcium oxide. The stability was raised by addition of manganese oxide.

     
  5. 5.

    The regenerability of a catalyst is lowered by addition of copper or zinc oxide and disappears completely when silver, magnesium, calcium, or barium oxide is present in the catalyst. When the catalyst is treated with air at 450°, its selectivity is lost when it has an addition of silver, magnesium, or calcium oxide and is preserved when it has an addition of manganese oxide.

     

Keywords

Oxide Polymerization Calcium Copper Ethylene 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Consultants Bureau Enterprises, Inc. 1961

Authors and Affiliations

  • Ya. T. Éidus
    • 1
  • K. V. Puzitskii
    • 1
  • B. A. Kazanskii
    • 1
  1. 1.N. D. Zelinskii Institute of Organic ChemistryAcademy of Sciences of the USSRUSSR

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