Production of vinylidene olefins
First Claim
1. A process for producing vinylidene olefin using a trialkylaluminum compound as the sole catalyst component charged to the reactor, which process comprises forming and heating a mixture of vinyl olefin and at least one trialkylaluminum compound as the catalyst in a ratio in the range of 0.001 to 0.5 mol of trialkylaluminum per mol of the initial vinyl olefin at a temperature in the range of about 100°
- to about 200°
C. for a period of time sufficient to convert in the range of about 10 to about 99% by weight of the initial vinyl olefin to a different product with vinylidene dimer selectivity of at least 80%, with the proviso that said mixture is maintained in direct contact with passivated ferrous metal interior surfaces of and/or in said reactor for a total period of at least one hour during which the reaction mixture is at a temperature above about 50°
C.
9 Assignments
0 Petitions
Accused Products
Abstract
Vinylidene olefin can be formed in good yield and high selectivity in much shorter reaction periods than found critical heretofore. The process involves dimerizing vinyl olefin with at least one trialkylaluminum compound as the sole catalyst component charged to the reaction vessel. These materials are charged to the reactor so that it contains in the range of 0.001 to 0.5 mol of trialkylaluminum per mol of the initial vinyl olefin. The reaction is performed at a temperature in the range of 100° to 200° C. for a period of time sufficient to convert 10 to 99% by weight of the initial vinyl olefin to a different product and form a product mixture with at least 80 wt % vinylidene dimer selectivity. In conducting the process the liquid mixture in the reactor is maintained in direct contact with passivated ferrous metal such as low nickel ferrous metal or steel alloy interior surfaces during at least 90 percent of the total period of time during which the reactor contents are at a temperature above about 50° C.
67 Citations
40 Claims
-
1. A process for producing vinylidene olefin using a trialkylaluminum compound as the sole catalyst component charged to the reactor, which process comprises forming and heating a mixture of vinyl olefin and at least one trialkylaluminum compound as the catalyst in a ratio in the range of 0.001 to 0.5 mol of trialkylaluminum per mol of the initial vinyl olefin at a temperature in the range of about 100°
- to about 200°
C. for a period of time sufficient to convert in the range of about 10 to about 99% by weight of the initial vinyl olefin to a different product with vinylidene dimer selectivity of at least 80%, with the proviso that said mixture is maintained in direct contact with passivated ferrous metal interior surfaces of and/or in said reactor for a total period of at least one hour during which the reaction mixture is at a temperature above about 50°
C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
- to about 200°
-
34. A process of dimerizing vinyl olefin to produce vinylidene olefin which comprises:
-
a) introducing into a reactor having low nickel ferrous metal alloy interior surfaces (i) vinyl olefin to be dimerized and (ii) a trialkylaluminum compound as the sole catalyst component charged to the reactor, (i) and (ii) being proportioned to result in a ratio in the range of 0.001 to 0.05 mol of trialkylaluminum per mol of the initial vinyl olefin, thereby forming a reaction mixture; b) maintaining the reaction mixture (i) in direct contact with passivated ferrous metal alloy interior surfaces, and substantially free of contact with metallic non-passivated nickel-containing surfaces in said reactor, for a the total period of time of at least one hour during which the reaction mixture is at a temperature above about 50°
C., and (ii) under substantially anhydrous oxygen-free conditions and at one or more temperatures in the range of 100°
to 200°
C. for a period of time in the range of 1 to 24 hours. - View Dependent Claims (35, 36, 37, 38, 39, 40)
-
Specification