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Systems and methods for fabricating polymers

A polymer, granular polymer technology, applied in the field of properties of the system, can solve difficult materials to obtain flow index data and other problems

Inactive Publication Date: 2013-11-06
UNIVATION TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this variation is large, it is difficult to obtain reliable flow index data for large batches of material

Method used

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  • Systems and methods for fabricating polymers
  • Systems and methods for fabricating polymers
  • Systems and methods for fabricating polymers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] Example 1 shows the flow index of polymers made with Catalyst A under a set of reaction conditions comprising a fixed hydrogen / ethylene ratio. figure 2 The particle size distribution of the polymers, and the flow index for various particle sizes are shown in . The flow index of the pelletized reaction product is considerably higher than that of the extruded polymer. Such as figure 2A comparison of the flow index of the granular polymer with the extrusion flow index of a size-graded fraction of this polymer, shown in , shows that all fractions show a clear flow index shift. It can also be seen that there is a significant variation in polymer flow index versus polymer size. Larger sized polymer particles have lower flow index values ​​than smaller particles.

Embodiment 2

[0114] Example 2 shows the flow index of the polymer produced using Catalyst A for a set of reaction conditions without hydrogen, increasing the reactor temperature and oxygen level to maintain the product flow index. figure 2 The polymer particle size distribution, and its flow index for various particle sizes are also shown in . As can be seen in this example, the flow indices of the pellets and extruded polymers are very similar. This is also true for bulk materials and size-graded sections of polymers, such as figure 2 shown in . Additionally, the variation in polymer flow index versus polymer particle size is significantly reduced, resulting in a more uniform polymer.

Embodiment 3

[0115] Example 3 shows the flow index of the polymer produced using Catalyst B under a set of reaction conditions with a hydrogen / ethylene ratio of 0.04. image 3 The particle size distribution of the polymers and the flow index for various particle sizes are shown. The flow index of the pelletized reaction product is significantly greater compared to the extruded polymer. It can also be seen that there is a significant variation in polymer flow index versus polymer particle size. Larger sized polymer particles have lower flow index values ​​than smaller particles.

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Abstract

Disclosed herein are various methods and systems for gas and liquid phase polymer production. In certain embodiments, the methods comprise manipulating properties of polymers produced by adjusting the hydrogen feed rate.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application Serial No. 61 / 203,390, filed December 22, 2008, the disclosure of which is incorporated by reference in its entirety. field of invention [0003] The present invention relates to polymer production, and more particularly to systems and methods for controlling the properties of polymers produced in gas and liquid phase processes. Background of the invention [0004] In gas phase processes for the production of polyolefins such as polyethylene, gaseous olefins (eg, ethylene), hydrogen, comonomers, and other raw materials are converted to solid polyolefin products. Typically, a gas phase reactor includes a fluidized bed reactor, a compressor, and a cooler (heat exchanger). The reaction is maintained in a two-phase fluidized bed of granular polyethylene and gaseous reactants by a fluidizing gas passing through a distribution plate near the bottom of the rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F2/34C08F4/24C08F4/78
CPCC08F10/00C08F210/16Y10S526/905C08F4/24C08F4/78C08F2/34C08F2500/12
Inventor M·G·古德M·波拉德K·J·卡恩R·S·艾辛格B·J·科普J·H·穆尔豪斯
Owner UNIVATION TECH LLC