Method for preparing oil soluble crude oil drag reducing powder

An oil-soluble, powder-based technology, applied in mechanical equipment, gas/liquid distribution and storage, pipeline systems, etc., can solve the problems of difficulty in controlling the molecular weight of drag-reducing polymers, easy water-absorbing and sticking of pulverized materials, and harsh service conditions. Solve the effect of difficult control, convenient storage and transportation, and reduce energy consumption of transportation

Inactive Publication Date: 2009-03-18
CHINA NAT OFFSHORE OIL CORP +2
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AI Technical Summary

Problems solved by technology

Drag-reducing polymers mostly tend to synthesize ultra-high-molecular-weight α-olefin polymers by the bulk method. Due to the harsh conditions of use of the traditional olefin polymerization catalyst Ziegler-Natta catalyst, and easy deactivation, the molecular weight of the drag-reducing polymer hard to control
[0003] In add

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Select a 3L airtight container equipped with a thermometer, take 2.0L of 1-octene, 0.5L of cyclopentadiene, 0.05g of iron-based 2,6-diacylpyridinediimide compound and 1.50 g of diethylaluminum chloride g, vacuumize, fill with nitrogen, stir, monitor the change of the viscosity of the reaction solution, stop stirring after reaching a certain viscosity, put it in the medium of -5 ℃ temperature system for a certain period of time, take it out for a week at room temperature, and finally get light purple polymer. After the drag reduction test of the drag reducing agent ring, when the mass concentration of the polymer added in the ring is 10 ppm, the drag reduction rate is as high as 48.3%.

Embodiment 2

[0022] Select a 3L airtight container equipped with a thermometer, take 2.0L of 1-octene, 0.5L of cyclopentadiene, 0.05g of iron-based 2,6-diacylpyridinediimide compound and 1.00 g of diethylaluminum chloride g, vacuumize, fill with nitrogen, stir, monitor the change of the viscosity of the reaction solution, stop stirring after reaching a certain viscosity, put it in the medium of -5 ℃ temperature system for a certain period of time, take it out for a week at room temperature, and finally get light purple polymer. According to the drag reduction test of the drag reducing agent ring channel, when the mass concentration of the polymer added in the ring channel is 10 ppm, the drag reduction rate is as high as 42.4%.

Embodiment 3

[0024] Select a 3L airtight container equipped with a thermometer, get 1.8L of 1-octene, 0.7L of cyclopentadiene, 0.05g of iron-based 2,6-diacylpyridinediimide compound and 1.50 g of diethyl aluminum chloride g, vacuumize, fill with nitrogen, stir, monitor the change of the viscosity of the reaction solution, stop stirring after reaching a certain viscosity, put it in the medium of -5 ℃ temperature system for a certain period of time, take it out for a week at room temperature, and finally get light purple polymer. Through the drag reduction test of the drag reducing agent ring, when the mass concentration of the polymer added in the ring is 10ppm, the drag reduction rate is as high as 45.6%.

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Abstract

A method for preparing oil soluble drag reduction powder is characterized in that the method comprises the following steps: in the nitrogen gas atmosphere, carrying out the copolymerization reaction of long chain alpha-olefin with the carbon number of between 4 and 20 and cyclopentadiene according to certain proportion at a temperature of between 5 DEG C below and 20 DEG C with a catalysis system formed by a diamine metal compound added with pyridine and an ethyl chloride, and obtaining a polymer with high molecular weight. The inherent viscosity is between 10 and 20, and the weight ratio of alpha-olefin to cyclopentadiene is between 1 to 99 and 20 to 80; and the alpha- olefin polymer is frozen to a glass state by freezing air of 100 DEG C below through an air turbine expansion refrigeration method, simultaneously a stearate insulating agent is added, and crushing treatment is carried out in a low-temperature crusher so as to obtain the drag reduction copolymer powder product.

Description

technical field [0001] The invention relates to petroleum pipeline transportation technology, in particular to a preparation method of an oil-soluble crude oil drag reducing powder for drag reduction of crude oil pipelines. Background technique [0002] Drag reducer is a chemical additive widely used in crude oil pipeline transportation. It can greatly reduce the frictional resistance of the pipeline system by adding a small amount to the crude oil fluid flowing in turbulent state, rapidly and economically expand the pipeline flow capacity and reduce the transportation energy consumption. Improve the safety factor of pipeline operation. Practice has proved that the increase and transmission capacity of the drag reducing agent can exceed 30%-50% of the designed transportation capacity, and it has a broad market application prospect and huge commercial value. Drag-reducing polymers tend to synthesize ultra-high molecular weight α-olefin polymers by bulk method. Due to Ziegler...

Claims

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Application Information

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IPC IPC(8): C08F232/06C08F210/00C08F4/70C08J3/12C08L45/00C08K5/098F17D1/17
Inventor 周伟生魏清黄占凯宋海燕石硕年张磊
Owner CHINA NAT OFFSHORE OIL CORP
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