| abstract |
The present invention relates to a method for producing a drag reducing agent (DRA) for C4-C30 α-olefin with an ultra high molecular weight (UHMW). The method involves polymerizing a first α-olefin monomer in a reactor with a catalyst and a hydrocarbon solvent to produce DRA. The catalyst consists principally of at least one tertiary monophenyl amine of formula R1R2N-aryl, wherein R1 and R2 are the same or different, and each is a hydrogen, alkyl group, or a cycloalkyl, containing at least one of R1 and R2 on at least one carbon atom; At least one titanium halide of the formula TiXm, where m ranges from 2.5 to 4.0 and X is a halogen-containing radical; And at least one co-catalyst has the formula AlRnY3-n where R is a hydrocarbon radical, Y is a halogen or hydrogen, and n ranges from 1 to 20. Furthermore, the catalyst does not contain a carrier |