Complex electron donor for drag reducer polymerization

Abstract

The invention relates to an organic polymer synthesis technique, in particular to a complex electron donor for drag reducer polymerization, belonging to the technical field of chemical industry. The complex electron donor is characterized in that polymerization monomers are added into an anhydrous oxygen-free reaction system, wherein the mixture ratio of laurylene to styrene is 10:1-1:10, or the mixture ratio of laurylene to octylene is 10:1-1:10; the cocatalyst is 0.1%-3% and is obtained by diluting triisobutylaluminum with a refined solvent, wherein the triisobutylaluminum is 20%, the normal heptane is 20%-50%, the rubber solvent oil is 20%-50%, the main catalyst is 0.005%-0.1%, and the complex electron donor is 0.01%-0.5%; and the reaction temperature of the system is -40-10 DEG C, the stirring process is carried out continuously, the reaction time is 24-188 hours, thus a sticky super high molecular weight polymer is obtained. The invention has the advantages of obviously improving the activity of the catalyst system, reducing the consumption of the main catalyst, reducing the consumption of other additives, and the like. In the process of production, the heat release of the catalysis system is uniform, and the process control is stable. By applying the complex electron donor of the invention to long-distance oil transmission pipelines, the pipeline transmission capacity is improved.

Description

technical field [0001] The invention relates to an organic polymer synthesis technology, in particular to a composite electron donor used for polymerization of a drag reducer, and belongs to the technical field of chemical industry. Background technique [0002] The homopolymerized or copolymerized drag reducer molecules are all mixtures, and their molecular weights are also average molecular weights. In order to improve the performance of drag reducer products, it is required that its molecular weight should be distributed as evenly as possible. The electron donor is a newly developed additive in recent years. Its addition can increase the activity of the catalyst, improve the isotacticity of the drag reducer molecule, and make the molecular weight uniformly distributed, thereby improving the performance of the drag reducer product. The high activity and high stereoselectivity of the catalyst can only be achieved by selecting a suitable electron donor to match with the cat...

AI Technical Summary

Problems solved by technology

The third-generation electron donor is represented by dicyclopentyldimethoxysilane (DCPDMS, DONOR-D), which has been promoted and used abroad, but is still in the trial stage in China.