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Method for preparing rare earth catalyst applied to isoprene rubber production

A rare earth catalyst and isoprene rubber technology, applied in the field of polymer materials and production automation, can solve the problems of catalyst activity difference, slow feeding speed, insufficient feeding speed and mixing degree, etc. The effect of improving efficiency

Active Publication Date: 2013-03-06
FUSHUN YIKESI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] And the more critical restrictive factor is, in the small-scale catalyst preparation process in the existing laboratory, the feeding rate of each component of the catalyst is easy to control uniformly and slowly, and it is also easy to mix uniformly between each component, but industrial production The feeding speed and mixing degree in the process have not been controlled and solved by key links, and have not attracted the attention and understanding of relevant R&D and production personnel
In fact, the feeding speed and mixing uniformity of each component of the rare earth catalyst have a great influence on the catalyst activity. The degree of uniformity directly affects the structure of the coordination product, which directly leads to the difference in catalyst activity

Method used

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  • Method for preparing rare earth catalyst applied to isoprene rubber production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1, two stainless steel preparation kettles with the same external dimensions and internal structure of A and B are used, and the volume is about 4m 3 , the inner diameter is 1.6m, and the effective height is 2m.

[0041] The outside of the two preparation kettles is provided with a jacket, and the interior is provided with 4 wall baffles and a stirrer with a stirring blade. The stirring blade is a turbine structure, the diameter of the blade is 0.6m, and the stirring speed is 60r / min, calculate the stirring Reynolds number Re to 3.6×10 5 (material density 700kg / m 3 , viscosity 7×10 -4 Pa.s).

[0042] The specific operation process is,

[0043] Replace the A preparation kettle with high-purity nitrogen, and quickly add 1.6m 3 Neodymium naphthenate hexane solution (the concentration of neodymium is 0.1mol / L) under normal temperature, start stirring;

[0044] Add 0.043m of sesquiethylaluminum chloride at room temperature at a rate of 1.8L / min (2kg / min) 3 ; ...

Embodiment 2

[0065] Example 2, adopt A and B two stainless steel preparation kettles with the same external dimensions and internal structure, with a volume of about 6m 3 , the inner diameter is 1.8m, and the effective height is 2.5m.

[0066] The outside of the two preparation kettles is provided with a jacket, and the inside is provided with 4 baffles from the wall and a stirrer with a stirring blade. The stirring blade is a paddle type inclined at 45°, the diameter of the blade is 1m, and the stirring speed is 120r / min, calculate the stirring Reynolds number Re to reach 2×10 6 (material density 700kg / m 3 , viscosity 7×10 -4 Pa.s).

[0067] The specific operation process is,

[0068] Replace the A preparation kettle with high-purity nitrogen, and quickly add 1.6m 3 Neodymium naphthenate hexane solution (the concentration of neodymium is 0.1mol / L) under normal temperature, start stirring;

[0069] Add 0.032m of sesquiethyl aluminum chloride at room temperature at a rate of 1L / min (...

Embodiment 3

[0077] Embodiment 3, two stainless steel preparation kettles with the same external dimensions and internal structure of A and B are used, and the volume is about 10m 3 , the inner diameter is 2.2m, and the effective height is 3m.

[0078] The outside of the two preparation kettles is provided with a jacket, and the inside is provided with 4 wall baffles and an agitator with a stirring blade. The agitating blade is a turbine structure with a diameter of 1.2m and a stirring speed of 150r / min, calculate the stirring Reynolds number Re to reach 7.2×10 6 (material density 700kg / m 3 , viscosity 7×10 -4 Pa.s).

[0079] The specific operation process is,

[0080] Replace the A preparation kettle with high-purity nitrogen, and quickly add 1.6m 3 The neodymium naphthenate hexane solution (the concentration of neodymium is 0.05mol / L) under normal temperature, starts to stir;

[0081] Add 0.011m of sesquiethyl aluminum chloride at room temperature at a rate of 0.8L / min (0.88kg / min...

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Abstract

The invention discloses a method for preparing a rare earth catalyst applied to isoprene rubber production, and provides a technology for preparing a catalyst required by industrial and continuous polymerization production, and a high-activity high-uniformity catalytic system required by industrial production of isoprene rubber. By controlling the feeding speed of each component of the catalyst and fully mixing components of the catalyst, the coordination reaction is controlled, so that the preparation efficiency and performance indexes of the rare earth catalyst are improved. In the process of preparing the rare earth catalyst, at least two preparation devices for fully mixing materials are used to alternately perform preparation and standing ageing of the catalyst. The materials for preparing the catalyst comprise a hexane solvent, and neodymium naphthenate, sesquiethyl aluminum chloride and triisobutyl aluminum which are mixed in sequence, and the molar ratio of Nd to Cl to Al is 1:(2-4):(10-20); the preparation and ageing temperatures are controlled to be between 0 and 40DEG C; and the ageing concentration (based on Nd) is 0.01 to 0.05mol / L, and the ageing time is controlled to be 1-24 hours.

Description

technical field [0001] The invention relates to a preparation method of a rare-earth catalyst applied to the production of isoprene rubber, that is, the manufacturing process and preparation control points for realizing industrialization, continuous preparation and production supply, and belongs to the technical field of polymer materials and production automation. Background technique [0002] Cis-1,4-polyisoprene rubber (referred to as isoprene rubber) is an important synthetic rubber obtained by directional polymerization of isoprene. It has excellent comprehensive properties because of its molecular structure and natural rubber The same, the performance is close to natural rubber, so it is also commonly known as synthetic natural rubber. It can be used alone or in combination with natural rubber or other synthetic rubber to replace or partially replace natural rubber. [0003] The production of isoprene rubber in foreign countries originated in the 1960s. The production...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F36/08C08F4/52
Inventor 王继叶吴国旭林庆菊张杰
Owner FUSHUN YIKESI NEW MATERIAL
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