Process for manufacture of olefin oligomer

A process for manufacturing an olefin oligomer comprising the steps of;

• polymerizing an olefin monomer in the presence of boron trifluoride and a boron trifluoride-alcohol complex as catalysts, to prepare a first oligomerization product;
• removing said boron trifluoride from said first oligomerization product by blowing an inert gas into said first oligomerization product, at a temperature of less than about 80.degree. C., to thereby prepare a second oligomerization product;
• and then
• subjecting said second oligomerization product to a precipitation treatment to separate said boron trifluoride-alcohol complex therefrom.

A process for manufacturing an olefin oligomer comprising the steps of:

• polymerizing an olefin monomer in the presence of boron trifluoride and a boron trifluoride-alcohol complex as catalysts, to prepare a first oligomerization product;
• removing said boron trifluoride from said first oligomerization product by heating said first oligomerization product at a temperature of less than about 80.degree. C., to thereby prepare a second oligomerization product;
• and then
• subjecting said second oligomerization product to a precipitation treatment to separate said boron trifluoride-alcohol complex therefrom.

A process for manufacturing an olefin oligomer comprising the steps of:

• polymerizing an olefin monomer in the presence of boron trifluoride and a boron trifluoride-alcohol complex as catalysts, to prepare an oligomerization product;
• removing said boron trifluoride from said oligomerization product by placing said oligomerization product under a reduced pressure, at a temperature of less than about 80.degree. C.;
• and
• centrifuging said oligomerization product under a centrifugal force of at least about 10G, to recover said boron trifluoride-alcohol complex.

A process for manufacturing an olefin oligomer comprising the steps of:

• polymerizing an olefin monomer in the presence of boron trifluoride and a boron trifluoride-alcohol complex as catalysts, to prepare an oligomerization product;
• removing said boron trifluoride from said oligomerization product by blowing an inert gas into said oligomerization product, at a temperature of less than about 80.degree. C.;
• and
• centrifuging said oligomerization product under a centrifugal force of at least about 10G, to recover said boron trifluoride-alcohol complex.

A process for manufacturing an olefin oligomer comprising the steps of:

• polymerizing an olefin monomer in the presence of boron trifluoride and a boron trifluoride-alcohol complex as catalysts, to prepare an oligomerization product;
• removing said boron trifluoride from said oligomerization product by heating said oligomerization product at a temperature of less than about 80.degree. C.;
• and
• centrifuging said oligomerization product under a centrifugal force of at least about 10G, to recover said boron trifluoride-alcohol complex.