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Industrial production method and device for highly isotactic polybutylene alloy

A technology for producing high-tactic polybutene and a production device, which is applied in the petrochemical field, can solve problems such as unseen methods, steps and device disclosure, and achieve the effects of filling market gaps, no three-waste emissions, and simple preparation methods.

Active Publication Date: 2015-05-20
QINGDAO UNIV OF SCI & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] At present, polybutene alloy has not yet been industrialized, so there is no disclosure of its industrial production process methods, steps and devices

Method used

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  • Industrial production method and device for highly isotactic polybutylene alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] After the prepolymerization kettle of 3 cubic meters is processed by the vacuum nitrogen system, the triethylaluminum (Al) and the external electron donor methylcyclohexyldimethoxysilane ( Silicon Si compound) and supported titanium catalyst (Ti mass content 3.5%) 200g, then add 1000Kg of refined propylene, wherein Al / Ti=20 (molar ratio), Al / Si=0.5 (molar ratio). Stir and polymerize at 90°C for 3 hours, depressurize the prepolymerization tank through a decompression device, and discharge the unreacted propylene monomer into the propylene monomer gas cabinet. The polypropylene particles after removal of propylene are transported through the pipeline system to a 12 cubic meter polymerization kettle treated by a vacuum nitrogen system, and then 3000Kg of refined liquid phase 1-butene monomer is added to the polymerization kettle through the batching system, Add 10 L of hydrogen gas and react at 30°C for 8 hours. After the reaction, the polymerization tank is decompressed t...

Embodiment 2

[0054] After the 3 cubic meters of prepolymerization kettle is treated by vacuum nitrogen system, metered monomethylaluminum dichloride (Al), external electron donor diisopropyldimethoxy Base silane (silicon Si compound) and supported titanium catalyst (Ti mass content 2%) 180g, then add propylene 1000Kg after refining, wherein Al / Ti=200 (molar ratio), Al / Si=0.001 (molar ratio). Stir and polymerize at 60°C for 6 hours, depressurize the prepolymerization tank through a decompression device, and discharge unreacted propylene monomer into the propylene monomer gas tank. The polypropylene particles after removal of propylene are transported through the pipeline system to a 12 cubic meter polymerization kettle treated by a vacuum nitrogen system, and then 1500Kg of refined liquid-phase 1-butene monomer is added to the polymerization kettle through the batching system, Add 15 L of hydrogen gas, and react at -10°C for 48 hours. After the reaction, the polymerization tank is decompres...

Embodiment 3

[0056] After the 3 cubic meter prepolymerization kettle is treated by the vacuum nitrogen system, the metered dimethylaluminum monochloride (Al), the external electron donor dicyclopentadimethoxy Silane (silicon Si compound) and supported titanium catalyst (Ti mass content 3.3%) 180g, then add 600Kg of refined propylene, wherein Al / Ti=10 (molar ratio), Al / Si=0.01 (molar ratio). Stir and polymerize at -20°C for 0.1 h, depressurize the prepolymerization tank through a decompression device, and discharge the unreacted propylene monomer into the propylene monomer gas tank. The polypropylene particles after removal of propylene are transported through the pipeline system to a 12 cubic meter polymerization kettle treated by a vacuum nitrogen system, and then 3000Kg of refined liquid phase 1-butene monomer is added to the polymerization kettle through the batching system, Add 16L of hydrogen gas and react at 30°C for 8 hours. After the reaction, the polymerization tank is decompresse...

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Abstract

The application discloses an industrial production method and device for a highly isotactic polybutylene alloy. The production method comprises the following steps: firstly polymerizing propylene in a prepolymerization kettle at -20 to 90 DEG C to form polypropylene particles loaded with active centers, carrying out reduced pressure recovery on the unreacted propylene monomer into a propylene monomer gas cabinet, putting polypropylene loaded with active centers and 1-butene monomer into the polymerization kettle and polymerizing at -10 to 80 DEG C to obtain a granular polybutene alloy, removing partial unreacted monomer under reduced pressure, feeding the materials in the prepolymerization kettle into a flash kettle to further remove unreacted 1-butene, sequentially introducing nitrogen into the flash kettle for replacing air, discharging the granular isotactic polybutene alloy from a discharge valve arranged at the bottom of the kettle, extruding and packaging. The production device comprises a batching system, a polymerization system, a post-treatment packaging system, a vacuum nitrogen system, a degassing flash system and a utility system. By the method and the device, the industrialized synthesis of the polybutylene alloy can be achieved and the method has the advantages of no organic solvent and no waste emissions and belongs to the scope of environment-friendly clean production.

Description

technical field [0001] The present invention relates to the field of petrochemical industry, in particular to a production method of polybutene alloy, and more specifically to an industrial production method and device for preparing polybutene alloy material in a kettle by liquid phase bulk polymerization. Background technique [0002] Generally, polypropylene has the characteristics of low density, low price, and good processability, and its yield strength, tensile strength, surface hardness, and elastic modulus are all excellent. However, PP has poor impact resistance at low temperature, large molding shrinkage, easy aging, and poor thermal creep resistance, which greatly limits its application range. [0003] Isotactic polybutene is a semi-crystalline polymer with properties including high flexibility, outstanding creep resistance, and tensile strength at elevated temperatures. However, it takes a long time to cool and solidify from the melt, and it often takes more than...

Claims

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Application Information

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IPC IPC(8): C08F110/08C08F110/06C08F293/00C08F4/646C08F2/02C08F2/01C08L23/20C08L23/12C08L53/00
Inventor 贺爱华邵华锋刘振学刘晨光柳金章姚刚
Owner QINGDAO UNIV OF SCI & TECH
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