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Continuous preparation process of nickel-based butadiene rubber and rare earth-based butadiene rubber

A butadiene rubber and preparation process technology, which is applied in the field of continuous preparation process of nickel-based butadiene rubber and rare earth-based butadiene rubber, can solve the problems of consuming a lot of time, manpower and material resources, and achieve the effect of not affecting the reactivity

Active Publication Date: 2021-02-19
ZHEJIANG TRANSFAR SYNTHETIC MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although both nickel-based butadiene rubber and rare earth-based butadiene rubber can adopt the continuous solution polymerization process, due to the difference in the catalyst system between nickel-based catalysts and rare-earth-based catalysts, generally nickel-based butadiene rubber and rare-earth-based butadiene rubber use different For the production of the polymerization unit, even if the same set of polymerization unit is used for production, it is necessary to stop the polymerization unit and clear the kettle to switch the production of rubber types, which requires a lot of time, manpower and material resources

Method used

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  • Continuous preparation process of nickel-based butadiene rubber and rare earth-based butadiene rubber

Examples

Experimental program
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Effect test

Embodiment 1

[0062] Neodymium neodecanoate, diethylaluminum hydride, sesquiethylaluminum chloride and tetrahydrofuran were mixed in a molar ratio of 1:25:3:3 to obtain a rare earth catalyst, and aged at 50°C for 4 hours. Simultaneously, butadiene monomer and solvent are made into described butyl oil by refining unit, wherein, the introduction amount of butadiene monomer is 7.1m 3 / h, the amount of solvent introduced is 28m 3 / h, the concentration of butyl oil is 125.4g / L, the concentration of oxygenated compound in the control butyl oil is 8mg / kg, stop butadiene carrying water, control the water value in butyl oil to 25ppm.

[0063] Stop introducing the nickel-based catalyst, and with the introduction of 12L / h, the aged liquid of the rare-earth catalyst (Nd / butadiene monomer molar ratio is 1.0×10 -4 ) and butyl oil and 16L / h (0.03% of the mass of butadiene monomer) stabilizer mixed in a static mixer and enter the first polymerization tank. After about 2 hours, add the terminator of 113.6...

Embodiment 2

[0065] In this embodiment, on the basis of Example 1, the butadiene monomer and solvent are made into the butadiene monomer through a refining unit, wherein the introduction amount of the butadiene monomer is 8.8m 3 / h, the amount of solvent introduced is 28m 3 / h, the concentration of butyl oil is 148.3g / L, the concentration of oxygenated compounds in the control butyl oil is 8mg / kg, butadiene enters the water tank, and the control water value is 40ppm.

[0066] Stop the introduction of rare earth catalyst aging solution, stabilizer, molecular weight regulator, glue line terminator and viscosity reducer at the end of polymerization, and mix nickel and aluminum agents with butyl oil in a static mixer after aging. In the first polymerization kettle, the boron agent (boron agent diluent oil 1000L / h) is introduced into the first polymerization kettle separately, and the molar ratio of Ni, Al and B in the nickel-based catalyst is 0.9:0.31:0.9. After about 2 hours, 109 L / h (0.2% o...

Embodiment 3

[0068] In this embodiment, on the basis of Example 2, the introduction of nickel-based catalysts is stopped, and the introduction of butadiene monomer is reduced to 7.1m 3 / h, the concentration of butyl oil is 125.4g / L, the concentration of oxygenated compound in the control butyl oil is 8mg / kg, stop butadiene carrying water, control the water value in butyl oil to 25ppm. With the introduction amount of 12L / h, the aged liquid of rare earth catalyst (Nd / butadiene monomer molar ratio is 1.0×10 -4 ) is introduced, mixed with butyl oil and 16L / h (0.03% of the mass of butadiene monomer) stabilizer in a static mixer and then enters the first polymerization tank. After about 2 hours, add the terminator of 113.6L / h (2% of the mass of butadiene monomer) and the antioxidant of 88L / h (0.2% of the mass of butadiene monomer) at the outlet line of the polymerization end kettle , 24.7L / h (0.5% of the mass of butadiene monomer) viscosity reducer. According to the Mooney adjustment of the mo...

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Abstract

The invention relates to a continuous preparation process of nickel-based butadiene rubber and rare-earth-based butadiene rubber, comprising: continuously introducing butadiene oil and one of nickel-based catalysts and rare-earth-based catalysts into a polymerization reaction unit of a polymerization device for polymerization reaction to obtain nickel-based or rare-earth-based butadiene rubber glue, and then introduce the glue into the coagulation unit for coagulation to obtain nickel-based or rare-earth-based butadiene rubber, wherein butyl oil includes butadiene monomer and solvent, which contains The content of oxygen compounds is less than or equal to 20mg / kg, and the water value is less than or equal to 50ppm; Among them, when preparing nickel-based butadiene rubber, the introduction of rare earth catalysts is stopped, and butyl oil and nickel-based catalysts are introduced into the polymerization reaction unit; When using butadiene rubber, the introduction of nickel catalyst is stopped, and butyl oil and rare earth catalyst are introduced into the polymerization reaction unit. Therefore, the present invention can realize the flexible switching production of nickel-based butadiene rubber and rare-earth-based butadiene rubber on the same set of polymerization device without shutting down to clean the kettle.

Description

technical field [0001] The invention relates to the technical field of butadiene rubber preparation, in particular to a continuous preparation process for nickel-based butadiene rubber and rare earth-based butadiene rubber. Background technique [0002] Butadiene rubber is a synthetic rubber with regular structure formed by the polymerization of butadiene monomer. According to different catalysts, it can be divided into nickel-based butadiene rubber, cobalt-based butadiene rubber, titanium-based butadiene rubber and rare earth (neodymium) Department) butadiene rubber. [0003] Although both nickel-based butadiene rubber and rare earth-based butadiene rubber can adopt the continuous solution polymerization process, due to the difference in the catalyst system between nickel-based catalysts and rare-earth-based catalysts, generally nickel-based butadiene rubber and rare-earth-based butadiene rubber use different For the production of the polymerization unit, even if the same ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F136/06C08F4/70C08F4/52C08F2/06C08C2/06
CPCC08F136/06C08C2/06C08F4/7098C08F4/52C08F2/06C08F4/545
Inventor 周家海陈华锋朱梦斌高久奇
Owner ZHEJIANG TRANSFAR SYNTHETIC MATERIAL CO LTD
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