Process for trimerization

Patent 4668838 Issued on May 26, 1987. Estimated Expiration Date:

March 14, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3088985

3242099

3347840

3627700

3756977

Use of alkylaluminum compounds and hydroxyl-containing compounds to initiate polymerization of ethylene with chromium oxide catalysts Patent #: 4564660
Issued on: 01/14/1986
Inventor: Williams , et al.

Inventor

Briggs, John R.

Application

No. 06/839638 filed on 03/14/1986

US Classes:

585/513, And N-, P-, or S-containing502/117, Component B metal is other than titanium or vanadium526/100, Contains non-metal organic N, O, S or P containing compound526/141, Non-metal material is organic nitrogen-containing compound526/142, Non-metal material is organic oxygen-containing compound585/512Al-and transition metal-containing

Examiners

Primary: Pal, Asok

Attorney, Agent or Firm

Bresch; Saul R.

International Classes

C07C 2/32 (20060101)
C07C 2/00 (20060101)

Abstract

A process for the trimerization of an olefin selected from the group consisting of ethylene, propylene, 1-butene, and mixtures thereof comprising passing the olefin in contact with a catalyst comprising the reaction product of (i) a chromium compound, which will provide active catalytic species under trimerization conditions; (ii) a hydrocarbyl aluminum hydrolyzed with about 0.8 to about 1.1 moles of water per mole of aluminum compound; and (iii) a donor ligand selected from the group consisting of hydrocarbyl isonitriles, amines, and ethers wherein the aluminum to chromium mole ratio is in the range of up to about 200 to one and the ligand to chromium mole ratio is in the range of up to about 100 to one.