Process for the preparation of neodymium neodecanoate and use thereof as catalyst component for the polymerization of butadiene solution.

摘要

A process for the preparation of neodymium neodecanoate for use as the metallic component of a coordination catalyst, characterized by the steps of: (a) preparation of a sludge of neodymium oxide in an organic aliphatic, cycloaliphatic solvent, or mixtures of these, at temperatures between ambient temperature and 100; (B) reaction of this sludge of neodymium oxide with neodecanoic acid in presence of hydrochloric acid diluted to low concentrations, in the same temperature range; the molar ratio between neodecanoic acid and neodymium oxide is from 6: 1 to 15: 1, and the final reaction product is a slightly turbid solution with an oily aspect or not, that may contain up to 40,000 ppm synthesis water; (C) pelleting the product resulting from the above reaction, from which the supernatant phase is a clear solution containing an excess of acid and 8,000 to 25,000 ppm of synthesis water; (D) separation dela supernatant phase, followed by its inertization with nitrogen, and storage for later utilization in the catalyst preparation.