Claims
- 1. A process consisting essentially of trimerizing olefins in the presence of catalyst prepared by a process comprising forming a mixture of:
- (a) a chromium salt selected from the group consisting of chromium salts having the formula CrX.sub.n wherein "X" can be the same or different and is an organic or inorganic radical and "n" is an integer from 1 to 6, and chromium metal;
- (b) a metal amide selected from the group consisting of alkali metal amide salts, alkali earth metal amide salts, and mixtures thereof; and
- (c) an electron pair donor solvent.
- 2. A process according to claim 1 wherein said olefin has from about 2 to about 30 carbon atoms per molecule.
- 3. A process according to claim 1 wherein said olefin is ethylene.
- 4. A process according to claim 1 wherein said metal amide has from about 1 to about 20 carbon atoms per molecule.
- 5. A process according to claim 1 wherein said metal amide is an aromatic compound.
- 6. A process according to claim 1 wherein said metal amide has an amide ligand and wherein amide ligand is selected from the group consisting of pyrrolide ligands, derivatives of pyrrole ligands, and mixtures thereof.
Parent Case Info
This application is a Division of application Ser. No. 08/290,048, filed Jul. 29, 1994 now U.S. Pat. No. 5,523,507, which is a division of application Ser. No. 08/109,858, filed Aug. 20, 1993, now U.S. Pat. No. 5,376,612, which is a file wrapper continuation of application Ser. No. 07/807,292, filed Dec. 13, 1991, now abandoned, which is a continuation-in-part of application Ser. No. 07/698,639, the entirety of which is herein incorporated by reference, filed May 10, 1991, now abandoned; which is a continuation-in-part of application Ser. No. 07/454,554, the entirety of which is herein incorporated by reference, filed Dec. 21, 1989, now abandoned; which is a continuation-in-part of application Ser. No. 07/392,688, the entirety of which is herein incorporated by reference, filed Aug. 10, 1989, now abandoned.
US Referenced Citations (32)
Foreign Referenced Citations (4)
Number |
Date |
Country |
0 611 743 |
Feb 1994 |
EPX |
0 614 865 |
Mar 1994 |
EPX |
2253029 |
Dec 1973 |
FRX |
45-24153 |
Aug 1970 |
JPX |
Non-Patent Literature Citations (9)
Entry |
ACS Preprints, Symposia on Novel Preparation and Conversion of Light Olefins (Reagen, Sep. 1989). |
Zeitschrift fur Naturforschung, Pyrrolylchromium Compounds, 21b, p. 1239 (D. Tille, 1966). |
Z. Anorg. Alleg. Chem., Organometal Compounds of Nitrogen Systems, 384, pp. 136-146 (D. Tille, 1971). |
J. Chem. Soc. Chem., Commun., Selective Trimerization of Ethylene to Hex-1-ene, pp. 674-675 (A. Briggs, 1989). |
Polyolefin Plastics, T.O.J. Kresser, pp. 3-6. (No date). |
Textbook of Polymer Science, F.W. Billmeyer, Jr., (1984), 91-96. |
Ziegler-Natta Catalysts and Polymerizations, J. Boor, Jr., 279-284 (No date). |
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Divisions (2)
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Date |
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Parent |
290048 |
Jul 1994 |
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Parent |
109858 |
Aug 1993 |
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Continuations (1)
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Date |
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Parent |
807292 |
Dec 1991 |
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Continuation in Parts (3)
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Date |
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Parent |
698639 |
May 1991 |
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Parent |
454554 |
Dec 1989 |
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Parent |
392688 |
Aug 1989 |
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