Preparation method of multifunctional resistance-reducing polymer suspension

A suspension and polymer technology, which is applied in the field of preparation of drag-reducing polymer suspensions, can solve the problems of poor drag-reducing effect of drag-reducing agents, and achieve good drag-reducing effects, stable properties, and convenient filling

Inactive Publication Date: 2007-09-19
LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the disadvantage of poor drag reducing effect of existing drag reducing agents, and provides a new preparation method of multifunctional drag reducing polymer suspension.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1 (comparative example)

[0020] 1) Preparation of α-olefin polymer:

[0021] Take 1000 g of 1-octene that has been refined and pre-cooled to 0 ° C, add 18 ml of 15% (mass) triethylaluminum n-hexane solution, stir at 0 ° C for 30 minutes, and then add TiCl 3 Catalyst 0.45g, mix well. As the reaction progresses, the viscosity of the reaction system increases gradually until the catalyst no longer precipitates, and then it is placed in a low-temperature environment (-20° C. to 30° C.) to react for 4 to 7 days. The weight average molecular weight of the polymer obtained in this way is about 4.6×10 6 , The monomer conversion rate of 1-octene is 95.2%, which is recorded as polymer A.

[0022] Take 1000 g of 1-octene and 1-decene (molar ratio 4:1) that has been refined and pre-cooled to 0 ° C, add 20 ml of 15% (mass) triethylaluminum-n-hexane solution, at 0 ° C Stir for 30 minutes, then add TiCl 3 Catalyst 0.5g, mix well. As the reaction progresses, the visco...

Embodiment 2

[0025] Embodiment 2 (comparative example)

[0026] 1) with embodiment 1;

[0027] 2) Take 30g of the synthesized α-olefin polymer B, coarsely crush it into particles smaller than 1 cm at room temperature, then add 20 g of ethylene-vinyl acetate with a diameter of about 6 mm, mix them and put them into a refrigerated low-temperature pulverizer In the environment of -130~-140°C, pulverize for 5 minutes to obtain a mixture powder larger than 80 mesh;

[0028] 3) Add 2g NP-7 nonionic surfactant, 0.01g silicone oil, 17g methanol, 30g purified water, 1g carboxymethyl cellulose (can be dissolved in water in advance) in the mixture powder of 2), in the mixer After stirring for 0.5-1 hour, a stable suspension product was finally formed, which was called sample II.

Embodiment 3

[0029] Embodiment 3 (invention example)

[0030] 1) with embodiment 1;

[0031] 2) Take 40 g of the α-olefin polymer B synthesized in Example 1, add 13 g of ethylene-vinyl acetate, 13 g of polyoctearyl acrylate, and 6.5 g of polyalkenyl succinimide, and they are first coarsely crushed at room temperature into particles smaller than 1 cm, then mix them and put them into a refrigerated low-temperature pulverizer, and pulverize them for 6 minutes at an environment of less than -130 to -140 ° C to obtain a free-flowing mixture powder greater than 80 meshes;

[0032] 3) Add 3g NP-10, 0.01g simethicone, 16g methanol, 40g purified water, 0.7g carboxymethyl cellulose (can be dissolved in water in advance) to the mixture powder in 2), and stir in the mixer for 0.5 After ~1 hour, a stable suspension product was finally formed, referred to as Sample III.

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Abstract

The invention discloses a method of preparing multifunctional drag reduction polymer suspension, which includes steps: mixing alpha-olefin polymer with molecular weight of 4-5 millions, pour-point depressant, viscosity modifier and scale inhibitor, and comminuting the mixture to solid powder under temperature of minus 60 to minus 160 DEG C, mixing the solid powder, surfactant, foam resistant agent, thickening agent and residual alcohol-water mixture to prepare drag reduction polymer suspension. The prepared drag reduction polymer suspension has function of pour point depression, viscosity reduction, scale inhibition and drag reduction, can be widely used for multiple type crude oil transportation pipe, and can greatly increase drag reduction effect of different drag reducing agent in different crude oil.

Description

technical field [0001] The invention belongs to a preparation method of a drag-reducing polymer suspension. Background technique [0002] When the fluid flows in the pipeline, due to the influence of frictional resistance, the transmission volume of the pipeline will decrease or the energy consumption will increase, especially in the state of turbulent flow, the influence will be more obvious. Injecting a small amount of polymer into the oil delivery pipeline can significantly reduce the flow resistance. Since the first commercial application of the CDR drag reducer produced by the American CONOCO company in 1979 and its success in the Alaska crude oil pipeline, two methods of synthesizing drag-reducing polymers with α-olefins as monomers have been mainly developed, namely solution polymerization and Ontology aggregation. [0003] The original poly-α-olefin drag reducer adopts solution polymerization: the monomer and initiator are dissolved in a suitable solvent for polyme...

Claims

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Application Information

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IPC IPC(8): C08J3/05C08F10/00C08F4/54C08L23/00
Inventor 裴旭东陈卫红李朝恒张凡王秀珍程国良
Owner LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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