Claims
- 1. a process for the production of a supported Ziegler catalyst A (I) forming a support material by heating the magnesium salt of an organic carboxylic acid under conditions so that at least part thereof is converted to magnesium oxide, and (II) impregnating the said support material with the crude product of reacting together (a) a transition metal compound which is a halide, haloalkoxide or oxyhalide of titanium, vanadium or zirconium and (b) an aliphatic alcohol.
- 2. A process as claimed in claim 1 wherein the magnesium salt is magnesium formate, magnesium acetate, magnesium oxalate, magnesium malonate, magnesium maleate or magnesium benzoate.
- 3. A process as claimed in claim 1 wherein at least 60% of the magnesium salt is converted to magnesium oxide.
- 4. A process as claimed in claim 1 wherein the heating is carried out at a temperature between 5.degree. and 100.degree. above the decomposition temperature of the salt.
- 5. A process as claimed in claim 1 wherein the transition metal compound is a compound having the general formula M(OR).sub.n Cl.sub.m-n wherein M is Ti, V or Zr; zero.ltoreq.n<m; m is the valency of M; m=4 when M is Ti or Zr, or m=3, 4 or 5 when M is V; R is an alkyl group containing 1-12 carbon atoms.
- 6. A process as claimed in claim 5 wherein M is Ti.
- 7. A process as claimed in claim 1 wherein the transition metal compound is titanium tetrachloride.
- 8. A process as claimed in claim 1 wherein the quantity of transition metal compound employed is sufficient to give a concentration of transition metal in the catalyst in the range 1.5 to 9 wt % based on the total weight of catalyst.
- 9. A process as claimed in claim 1 wherein the alcohol contains 1-6 carbon atoms.
- 10. A process as claimed in claim 1 wherein the transition metal compound is titanium tetrachloride and the alcohol is isopropanol.
- 11. A process as claimed in claim 10 wherein the titanium tetrachloride and the isopropanol are reacted in the presence of a diluent.
- 12. A supported Ziegler catalyst prepared according to claim 1 which has been activated by the addition thereto of an activating quantity of a trialkyl aluminium compound.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8031/76 |
Mar 1976 |
GBX |
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Parent Case Info
This application is a continuation-in-part of applicant's earlier application Ser. No. 772,681 filed Feb. 28, 1977, now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3663660 |
Delbouille et al. |
May 1972 |
|
3676415 |
Diedrich et al. |
Jul 1972 |
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Foreign Referenced Citations (2)
Number |
Date |
Country |
1372628 |
Nov 1974 |
GBX |
1402738 |
Aug 1975 |
GBX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
772681 |
Feb 1977 |
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