Method for preparing catalyst special for crude oil drag reducing polymer

Abstract

A method for preparing a catalyst special for a crude oil drag reduction polymer is characterized in that the catalyst consists of a homogeneous catalysis system formed by a pyridine diamine metallic compound, a titanium metallic or boron compound loaded on spherical magnesium silicate, and an ester compound; the technological process of the preparation method comprises the following steps: (1) under the protection of nitrogen gas, adding the spherical magnesium silicate, the titanium metallic or boron compound such as titanium tetrachloride and proper amount of water into a reaction bulb with a stirrer, and stirring the mixture for 1 to 4 hours at room temperature to obtain a titanium metallic or boron compound intermediate loaded on the spherical magnesium silicate; and (2) under the protection of nitrogen gas, adding the pyridine diamine metallic compound such as pyridine diamine iron, a cobalt complex, and the ester compound such as a phthalic acid ethyl isobutyl diester into another reaction bulb with a stirrer, simultaneously dropping the intermediate obtained in the step (1) into the mixture at a speed about 0.5 to 2mL / min, increasing the temperature to between 35 and 50 DEG C, and stirring the mixture for 2 to 6 hours to obtain the catalyst.

Description

technical field [0001] The invention relates to the technical field of oil field chemicals and catalysis, and relates to a preparation method of a special polymer catalyst used for reducing transportation resistance in crude oil pipeline transportation. Background technique [0002] Oil-soluble drag reducer is a polymer chemical additive used in crude oil and refined oil pipeline transportation. Dissolving in oil can reduce the resistance of oil in turbulent flow, increase the flow rate and increase the pipeline's throughput. This method does not require Increasing the fixed equipment of the pipeline is a convenient and economical method to adjust the pipeline output. [0003] At present, most of the industrial drag reducer products are homopolymers and copolymers of α-olefins, which can be divided into colloidal drag reducer and slurry drag reducer in terms of product form, and the corresponding production process is a combination of solution polymerization and bulk polymer...

AI Technical Summary

Problems solved by technology

Regardless of the form of the product, the essence of the reaction is the coordinated anionic polymerization of α-olefins, using a Ziegler-Natta catalytic system. Such a catalytic system is a heterogeneous system and the catalyst is not dissolved in the reaction medium. The density difference between the catalyst and the reaction monomer is relatively large, and it is difficult to disperse evenly by shaking