Patent ID: 11964936
Assignee: NESTE OYJ
Field: Organic fine chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A process for controlled manufacturing of olefin trimers and olefin tetramers comprising:
a. feeding at least one olefin monomer and at least one oxygen-containing moderator into a first reactor unit containing a catalyst, wherein the at least one oxygen-containing moderator is a compound which contains oxygen, is an oxygenate, or is a compound including oxygen, carbon, and hydrogen;
b. operating the first reactor unit at a temperature selected from a range of 30-140° C. and at a pressure selected from a range of 800-5000 kPa for carrying out catalytic reactions between olefins inside the first reactor unit;
c. withdrawing a first reactor outlet stream from the first reactor unit;
d. distilling the first reactor outlet stream in a first distillation column to separate at least a first distillate including at least unreacted olefin monomers, and a first bottom product including at least dimers of the olefin monomers;
e. feeding the first bottom product into a second reactor unit containing a catalyst;
f. operating the second reactor unit at a temperature selected from a range of 30-140° C. and at a pressure selected from a range of 150-5000 kPa for carrying out catalytic reactions between olefins inside the second reactor unit;
g. withdrawing a second reactor outlet stream from the second reactor unit; and
h. distilling the second reactor outlet stream in a second distillation column to separate a second distillate including at least olefin dimers, and a second bottom product including at least trimers and/or tetramers of the olefin monomers; and wherein:
the process comprises:
controlling a composition of the second reactor outlet stream by:
i. feeding the olefin dimers of the second distillate and/or olefin dimers from an external source into the first reactor unit to increase an amount of olefin trimers in the second reactor outlet stream; and/or
ii. feeding the olefin dimers of the second distillate and/or olefin dimers from the external source into the second reactor unit to increase an amount of olefin tetramers in the second reactor outlet stream.