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Preparation method for oil soluble drag reducer

A drag reducing agent and oil-soluble technology, applied in the field of polymer drag reducing agent preparation, can solve the problems of high cost of low temperature pulverization, low embrittlement temperature, etc., and achieve the effects of fast dissolution rate, low production cost and difficult adhesion

Inactive Publication Date: 2012-04-11
TIANJIN VOCATIONAL INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the problem that the embrittlement temperature of the existing long-chain α-olefin drag-reducing polymer is very low, and the low-temperature pulverization cost is too high in the post-treatment process, and to provide a high molecular weight by copolymerization of olefins with different chain lengths, Preparation method of drag-reducing polymer that is easy to pulverize at low temperature, has fast dissolution rate and high drag-reducing rate

Method used

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  • Preparation method for oil soluble drag reducer
  • Preparation method for oil soluble drag reducer
  • Preparation method for oil soluble drag reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 10.0 g of polymer grade TiCl 3 Add 100ml of freshly distilled hexane solvent to make 100ml of main catalyst suspension; add 50ml of diethylaluminum chloride to 150ml of freshly distilled hexane solvent to make 200ml of cocatalyst solution. The experiments were carried out by using 250ml, 500, 3000ml glass polymerization bottles and filling them. After mixing the catalyst of titanium trichloride and diethylaluminum chloride, activate it for 30 seconds, then add it into the polymerization bottle containing olefin, and shake well.

[0042] Table 1 The impact of the feeding amount on the reaction

[0043]

[0044] The amount of catalyst added in the reaction is too small, the polymerization reaction cannot be initiated or the reaction is difficult to continue to a certain extent, the monomer conversion rate is low, and the polymer can still flow after 24 hours, and it is necessary to add a catalyst to make the polymer achieve sufficient hardness. The amount of catalyst ...

Embodiment 2

[0046] The polymerization reaction converts more than 50% within 24 hours, and the pre-polymerization temperature has a great influence on the reaction, and rapid cooling will be one of the technical difficulties. Corresponding forced cooling measures were taken. In addition to freezing the raw materials to below -5°C before adding the catalyst for polymerization, after the reaction started, the polymerization bottle was soaked in ice water to enhance heat dissipation, so that the heat generation of the polymerization bottle was slowed down, and the reaction temperature was always lower than 15°C. ℃, the reaction weakened after 6 hours and then transferred to another freezer to keep warm for one day. The experimental results are shown in Table 2.

[0047] Table 2 Prepolymerization temperature influence on reaction

[0048]

[0049] The low-temperature polymerization with slow reaction is beneficial to the synthesis of high-molecular-weight polymers, but after 24 hours, the...

Embodiment 3

[0051] The polymerization reaction conditions are very harsh, and impurities such as moisture and air have a great influence on the polymerization reaction. The influence of impurities existing under the experimental conditions was studied, and the experimental results are shown in Table 3.

[0052] The influence of table 3 impurities on the polymerization reaction

[0053]

[0054] If the raw material is not distilled after being dehydrated by molecular sieve, a small amount of molecular sieve will be brought in. Because the molecular sieve absorbs moisture, the raw materials around the molecular sieve are difficult to aggregate. If the polymerization bottle is not well sealed, the surface layer of the polymer is difficult to polymerize and turn white, and water may seep into it to prevent polymerization when it is soaked in ice water for forced cooling. If a plastic polymerization bottle is used, the raw materials close to the surface of the plastic are difficult to pol...

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Abstract

The invention discloses a preparation method for oil soluble drag reducer, which is characterized in that high purity an alpha-olefin material is obtained through implementing absorption and distillation pretreatment on alpha-olefin mixture; a Ziegler-Natta catalyst is added for prepolymerization to lead the viscosity of a liquid to be capable of preventing the catalyst from sinking; then polymerization reaction is implemented under a lower temperature between 10 DEG C between zero and 0 DEG C and finished until a conversion rate of monomer reaches 95 percent; then a drag reducing polymer is cut and a dispersing agent is added; then the drag reducing polymer is frozen by liquid nitrogen and is crushed to a granularity of 129 meshes under a low temperature; then the dispersing agent is dispersed, and the drag reducing polymer is mixed with a thickening agent and an aqueous surfactant liquid to prepare a finished product of stable drag reducer suspension. The drag reducing polymer copolymerized through the preparation method has high molecular weight, is easy to crush under low temperature, has fast solution velocity, is not adhered on the wall of an oil pipeline and has high drag reducing rate.

Description

technical field [0001] The invention relates to a preparation method of an oil-soluble drag reducer, in particular to a preparation method of a polymer drag reducer with high molecular weight, easy low-temperature pulverization, fast dissolution speed and high drag reduction rate through copolymerization. Background technique [0002] Drag reducer is a chemical additive widely used in pipeline transportation of crude oil and refined oil. Adding a small amount into turbulent fluid can greatly reduce the frictional resistance of the pipeline system, rapidly and economically expand the pipeline flow capacity and reduce the transmission energy. Reduce consumption, improve the safety factor of pipeline operation, and add drag reducer to make the pipeline delivery capacity exceed 30%-50% of the designed delivery volume. Drag reducers have broad market application prospects and great commercial value. In recent years, the market of drag reducing agents at home and abroad has devel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/14C08F2/02C08J3/05F17D1/17
Inventor 李建生何北菁吕英芳刘炳光李霞孙宝丰王少杰齐国鹏苏超李世梅崔淏
Owner TIANJIN VOCATIONAL INST
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