Ternary rare earth catalyst continuous aging device

Abstract

The invention relates to a ternary rare earth catalyst continuous aging device. The ternary rare earth catalyst continuous aging device comprises a first pipeline homogenizing pump, a binary aging pipeline, a second pipeline homogenizing pump and a ternary aging pipeline which are sequentially connected in series.. The ternary rare earth catalyst continuous aging device also comprises a first catalyst feeding unit, a second catalyst feeding unit and a third catalyst feeding unit, wherein the first catalyst feeding unit is used for introducing a rare earth compound into the first pipeline homogenizing pump, the second catalyst feeding unit is used for introducing alkyl aluminum into the first pipeline homogenizing pump, and the third catalyst feeding unit is used for introducing chloride into the second pipeline homogenizing pump. The invention also relates to a ternary rare earth catalyst continuous aging process. An aging reactor is replaced by the combination of the pipeline homogenizing pump and the aging pipeline, so that the raw materials of the ternary rare earth catalyst are mixed in the pipeline homogenizing pump and then aged in the conveying process of the aging pipeline,further, the raw materials of the ternary rare earth catalyst can be continuously fed and aged, the precision is high, the formula is flexibly adjusted, and the production efficiency is improved. Theprocess is suitable for long-time industrial continuous production of rare earth butadiene rubber.

Description

technical field [0001] The invention relates to the technical field of rare earth butadiene rubber preparation, in particular to a continuous aging device for a ternary rare earth catalyst and a continuous aging process thereof. Background technique [0002] Rare earth butadiene rubber is a polybutadiene rubber with high cis 1,4-structure content, which is produced by using a ternary rare earth catalyst to initiate butadiene polymerization. It has a regular molecular chain structure and a high relative molecular weight. Among them, the ternary rare earth catalysts include rare earth compounds, aluminum alkyls and chlorides. During the production process, they need to be mixed and aged for a period of time to form active centers and initiate polymerization reactions. Since the aging process is divided into two stages of binary aging and ternary aging, and the aging time and aging temperature of the two stages are different, it is difficult to realize continuous aging. At pre...

AI Technical Summary

Problems solved by technology

[0003] However, the single-tank batch aging method cannot be continuously aged. At the same time, the single-tank batch aging method will cause differences in catalyst activity between tanks due to differences in the amount of catalysts prepared in each tank and the control accuracy of aging conditions. Larger, therefore, not suitable for long-term continuous production of rare earth butadiene rubber industrialization

However, when the single-tank batch aging method is divided into multiple steps and carried out in multiple aging tanks, continuous aging cannot be achieved. At the same time, there are still shortcomings such as large differences in catalyst activity between tanks and insufficient sensitivity for formula adjustment.

Images