Modification of supported titanium-magnesium catalysts of ethylene polymerization with metal chlorides
It has previously been shown that the use of chlorides of nickel, cobalt, iron, tin, aluminum, or other metals as components of the supports for titanium-magnesium ethylene polymerization catalysts makes it possible to vary their catalytic activity and specificity over a wide range. The authors investigated the features of ethylene polymerization on Ziegler-Natta catalysts supported on MgCl/sub 2/ which have been modified with chlorides of Co, Ni, Sn, or V, with the objective of studying the mechanism of the modifying action of metal chlorides. The catalysts were prepared by dispersing MgCl/sub 2/ and the Lewis acid in a ball mill in the presence of TiCl/sub 4/. Compositions and activities of the catalysts prepared are shown. The introduction of nickel chloride or cobalt chloride into MgCl/sub 2/ leads to an increase in TiCl/sub 4/ activity while preserving the mechanism of its attachment to the support surface, while modification of MgCl/sub 2/ with tin tetrachloride or vanadium oxychloride leads to a sharp change in the state of TiCl/sub 4/ on the support surface and to a decrease in catalyst activity.
- OSTI ID:
- 6365813
- Journal Information:
- J. Appl. Chem. USSR (Engl. Transl.); (United States), Vol. 61:5; Other Information: Translated from Zh. Prikl. Khim.; 61: No. 5, 1085-1088(May 1988)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CATALYSTS
SURFACE TREATMENTS
ETHYLENE
POLYMERIZATION
MAGNESIUM CHLORIDES
CATALYTIC EFFECTS
PROMOTERS
MATERIALS TESTING
TITANIUM CHLORIDES
CATALYST SUPPORTS
CHEMICAL REACTION KINETICS
COBALT CHLORIDES
HETEROGENEOUS CATALYSIS
NICKEL CHLORIDES
OXYCHLORIDES
SURFACE PROPERTIES
TIN CHLORIDES
VANADIUM COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALKENES
CATALYSIS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COBALT COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYDROCARBONS
KINETICS
MAGNESIUM COMPOUNDS
NICKEL COMPOUNDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
REACTION KINETICS
TESTING
TIN COMPOUNDS
TIN HALIDES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
400201* - Chemical & Physicochemical Properties