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A kind of preparation method of bimodal MWD polyalphaolefin oil drag reducer

A drag reducer and olefin technology, applied in the field of organic macromolecular compounds and pipeline systems, can solve the problems of high cost, need for solvents, cumbersome process, etc., and achieve the effect of simple production process and easy control of reaction process

Active Publication Date: 2016-04-06
PIPECHINA SOUTH CHINA CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Patent CN101484546A discloses a method for improving the bi- or multimodal particle size distribution of drag-reducing polymer dissolution, by using polyolefin drag-reducing agents with bi- or multimodal particle size distribution to improve the flow of hydrocarbon fluids through pipelines of various lengths The drag reducing agent with smaller particle size dissolves more quickly or earlier in the pipeline, and the drag reducer with larger particle size dissolves later or farther in the pipeline, but this method is cumbersome to prepare
[0004] The synthesis method of polyα-olefin oil drag reducer is mainly based on solution polymerization method and bulk polymerization method. Among them, solution polymerization is to dissolve the polymerization monomer and catalyst in an appropriate solvent for polymerization. The disadvantage of this method is that the polymerization Solvent is needed in the process, and the solvent needs to be recycled after the polymerization. The process is cumbersome and the cost is high, so this method has been eliminated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1. 1-octene is used as the monomer for polymerization of α-olefin; the catalyst is a highly efficient carrier Ziegler-Natta catalyst and a [N, N, O, O] titanocene metal catalyst, and the highly efficient carrier Ziegler-Natta catalyst uses monochlorodiethyl The mixture of base aluminum and triisobutyl aluminum is activated at room temperature for 10 minutes, the molar ratio of diethyl aluminum chloride and triisobutyl aluminum is 3:1, and the efficient support Ziegler-Natta catalyst and diethyl aluminum chloride The molar ratio of the mixture of triisobutyl aluminum is 1:4; [N, N, O, O] Titanocene metal catalyst is activated with B (C6F5) 3 at 40°C for 30 min, [N, N, O, O] The molar ratio of titanocene metal catalyst to B(C6F5)3 is 1:100; the activation of both catalysts must be carried out under the protection of high-purity nitrogen. The molar ratio of the highly efficient carrier Ziegler-Natta catalyst to the [N, N, O, O] titanocene metal catalyst is 1:1, and ...

Embodiment 2

[0013] Example 2. The polymerization monomer α-olefin is a mixture of 1-decene and 1-tetradecene, and the molar ratio of the two is 1:3; the catalyst is the second-generation complex Ziegler-Natta catalyst and the efficient carrier Ziegler -Natta catalyst, complex Ziegler-Natta catalyst is activated with diethyl aluminum chloride at room temperature for 20 minutes, the molar ratio of complex Ziegler-Natta catalyst to diethyl aluminum chloride is 1:10, efficient carrier Ziegler- The Natta catalyst is activated with a mixture of diethyl aluminum chloride and triisobutyl aluminum at room temperature for 10 minutes, the molar ratio of diethyl aluminum chloride to triisobutyl aluminum is 3:1, and the highly efficient carrier Ziegler-Natta catalyst and The molar ratio of the mixture of diethyl aluminum chloride and triisobutyl aluminum is 1:4; the activation of both catalysts must be carried out under the protection of high-purity nitrogen. The molar ratio of complex Ziegler-Natta ca...

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PUM

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Abstract

The invention discloses a preparation method of a double-peak MWD poly-alpha-alkene oil product drag reducer. The preparation method comprises the following steps: completely replacing the air in a reactor A with a stirring device with high pure nitrogen gas, then adding alpha-alkene monomers into the reactor A, orderly adding a Ziegler-Natta catalyst and a metallocene catalyst into the reactor A in the protection of the high pure nitrogen gas to carry out the monomer polymerization reactions, wherein the mole ration of the catalyst to the monomers is 1:3000 to 1:9000, the mole ratio of the Ziegler-Natta catalyst to the metallocene catalyst is 1:4 to 4:1, and the time interval between the two additions of the catalysts is from 0 to 120 minutes; carrying out the reactions in the reactor A for 10 to 120 minutes at a room temperature, when the viscosity of the system is large enough to float the catalyst, pumping the pre-polymer in the reactor A to an open-close type reactor B, and carrying out reactions for 2 to 10 days at a temperature of minus 40 DEG C to 40 DEG C so as to obtain the target product. The preparation method has the advantages of simple production process, controllable reaction process, and timely elimination of heat energy; and the obtained polymer has double-peak MWD.

Description

Technical field [0001] The invention is a preparation method of a bimodal MWD poly-α-olefin oil drag reducer for oil transportation, and relates to the technical field of organic macromolecular compounds and pipeline systems. Background technique [0002] Due to the frictional resistance of fluid in the pipeline, the pipeline throughput is reduced or the energy consumption is increased. Injecting long-chain polymers into the pipeline can significantly reduce the flow resistance under turbulent flow. This phenomenon was as early as 1948. It was discovered by Toms, so it was named "Toms Effect". The "Toms effect" exists in both the water phase and the oil phase. Therefore, drag reducers are widely used in actual production. Poly-α-olefin drag reducer is a common oil-phase drag reducer. As a widely used chemical additive for crude oil and refined oil pipeline transportation, poly-α-olefin dissolved in the oil can reduce the turbulence of the oil. It is a convenient and economical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F2/02F17D1/17
Inventor 杨法杰张志恒贾子麒代晓东郭海峰徐海红李春漫常维纯李国平
Owner PIPECHINA SOUTH CHINA CO