Prepn process of higher alpha-olefin low-viscoelasticity bulk polymer

A viscoelasticity and polymer technology, applied in the field of preparation of high-grade alpha-olefin low-viscoelastic bulk polymers, can solve problems such as application troubles, polymer particle delamination, etc.

Active Publication Date: 2005-09-28
PIPECHINA SOUTH CHINA CO
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  • Summary
  • Abstract
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Problems solved by technology

In addition, the finally obtained slurry drag reducer product is prone to aggregation of polymer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0007] Embodiment: Polymerization monomer α-olefin selects 1-hexene, 1-octene and 1-decene to mix by the ratio of 1:2:3, and catalyst selects common Ziegner-Natta catalyst for use, main catalyst and α- The molar ratio of the olefin polymerization monomer is 1:1500, and the molar ratio of the co-catalyst and the main catalyst is 10:1. The refined polymerized monomer accounting for 50% by weight in the reaction mixture is added to the reaction vessel, and the main catalyst and the co-catalyst are respectively added under the conditions of -10 ° C, nitrogen protection and stirring, and 2.5 hours after the start of the reaction. The weight ratio of the reaction mixture is 50% anti-sticking agent powder ---talcum powder, and the stirring is continued for 3 hours until the reaction liquid loses fluidity, and then the reaction is continued for 6 days at a temperature of 18°C. The viscoelasticity of the high-grade α-olefin bulk polymer produced according to this example is greatly red...

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Abstract

The present invention is the preparation process of higher alpha-olefin low-viscoelasticity bulk polymer for reducing resistance of pipeline conveyed oil product. Under the conditions of low temperature and isolating air, refined monomer is reacted under stirring and in the presence of main catalyst and co-catalyst. In the first 1-3 hr of the reaction, antisticking powder in certain proportion is added; in the subsequent 3-6 hr, the reaction system is further stirred; and after that, the reaction is continued at 5-20 deg.c for 3-10 days to obtain the low-viscoelasticity solid bulk polymer. The process of the present invention is simple, and the product is easy to crush, high in storage stability and simple in application.

Description

technical field [0001] The invention is a preparation method of a high-grade α-olefin low-viscosity bulk polymer for drag reduction of pipeline oil products. Covers the areas of general chemical methods and piping systems. Background technique [0002] The higher α-olefins here refer to aliphatic hydrocarbons containing more than 5 carbon atoms and 1 carbon-carbon double bond at the end of the molecular chain in the molecule, which are used to synthesize ultra-high molecular weight comb polymers, that is, drag reducers (DragReducing-agent). It is applied to reduce fluid flow resistance in the turbulent state of crude oil or refined oil pipeline, so as to achieve the purpose of increasing pipeline throughput or reducing operating pressure. It can have a very obvious effect of increasing transportation or reducing pressure at the ppm level. Since the first commercial application of the drag reducer produced by Conoco in the United States in the Trans-Alaska crude oil pipelin...

Claims

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Application Information

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IPC IPC(8): C08F2/02C08F110/00
Inventor 税碧垣关中原
Owner PIPECHINA SOUTH CHINA CO
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