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Preparation method of powdered drag reducing agent for crude oil transportation

A drag reducer, powder technology, applied in mechanical equipment, gas/liquid distribution and storage, pipeline systems, etc., can solve the problems of high processing cost, intolerant of shear, easy to coagulate and glue, and achieve low production cost , Improve performance and consume less effect

Inactive Publication Date: 2013-04-10
TIANJIN VOCATIONAL INST
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  • Claims
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to start with the structural design of α-olefin drag-reducing polymers, to polymerize α-olefins on the surface and inside of inorganic powders to form a drag-reducing polymer that is easy to pulverize and process, has a high drag-reducing rate and is resistant to shearing, To solve the problems of high cost of low-temperature pulverization, easy coagulation and gelation during storage, and resistance to shearing of existing drag reducers

Method used

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  • Preparation method of powdered drag reducing agent for crude oil transportation
  • Preparation method of powdered drag reducing agent for crude oil transportation

Examples

Experimental program
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Effect test

Embodiment 1

[0031] 10.0 g of polymer grade TiCl 3 Add 100ml of freshly distilled hexane solvent to make a main catalyst suspension; add 50ml of diethylaluminum chloride to 150ml of freshly distilled hexane solvent to make a cocatalyst solution.

[0032]Add a total of 500g of 48% by weight α-octene and 2% vinyltriethoxysilane in the polymerization bottle as the polymerization raw material, then add 500g of talcum powder after burning treatment, mix well, and freeze in the freezer to below -5°C. Take the titanium trichloride catalyst and the diethylaluminum monochloride co-catalyst with a syringe, make them mix and activate for 30 seconds, add them into the polymerization bottle, and shake well. The weight ratio of the catalyst added is α-olefin:titanium trichloride:diethylaluminum chloride=1500:1:3. When the mixture is pre-polymerized until the viscosity of the reaction solution reaches the point where the catalyst and the powder no longer sink, it is left to react at -10°C-15°C for 24 h...

Embodiment 2

[0034] Add a total of 500g of 48% by weight α-octene and 2% vinyltriethoxysilane in the polymerization bottle as the polymerization raw material, then add 500g of magnesium oxide through burning treatment, mix well, and do the same according to Example 1 Experiments were carried out under the process conditions, and the experimental evaluation results of drag-reducing polymers are shown in Table 1. Low-temperature crushing of drag-reducing polymer consumes about 1.2 times the weight of liquid nitrogen refrigerant, 10×10 in 0# diesel -6 The drag reduction rate under the concentration is 52.8%, and the drag reduction rate after shearing is 36.4%. The powder drag reducer is stable for more than 300 days.

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Abstract

The invention discloses a preparation method of a powdered drag reducing agent for crude oil transportation. The preparation method is characterized in that inorganic powder is directly added to an alpha-olefin polymerization system to prepare the powdered drag reducing agent. The preparation method mainly comprises the following steps: 45-49wt% of alpha-olefin with a carbon number of C8-C18 and 1-5wt% of active ethenyl silane coupling agent are mixed and filled in a polymerization bottle; 50wt% of inorganic powder is added; a Ziegler-Natta catalyst is added for bulk polymerization to form a drag reducing polymer; the drag reducing polymer is ground by a low-temperature grinder to be under 200 meshes in the presence of a liquid nitrogen refrigerant and a disperser; and 40wt% of powdered drag reducing agent of the drag reduction copolymer is obtained. The method has the advantages that as the inorganic powder is directly added to the alpha-olefin polymerization system to prepare the powdered drag reducing agent, the problems that low temperature grinding is high in cost, and a product is coagulated easily during a storage course in the existing production process of the drag reducing agent are solved.

Description

technical field [0001] The invention relates to a method for preparing a powdery drag reducing agent for crude oil transportation, especially a method for polymerizing α-olefin on the surface and inside of an inorganic powder, which is easy to grind and process, has high drag reduction rate, shear resistance and low cost The invention discloses a preparation method of a powdery crude oil transportation drag reducer, which belongs to the field of petrochemical industry. Background technique [0002] Drag reducer is a chemical additive widely used in pipeline transportation of crude oil and refined oil products. Adding a small amount into turbulent oil products can convert turbulent flow into laminar flow, greatly reduce the frictional resistance of the pipeline system, and rapidly and economically expand Improve the oil pipeline flow and reduce the energy consumption of the delivery pump, and improve the safety factor of the old oil pipeline operation. The market of drag red...

Claims

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Application Information

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IPC IPC(8): C08F210/14C08F230/08C08F4/642C08L23/20C08L23/24F17D1/17
Inventor 李建生刘炳光王少杰刘彦峰宋戴炜
Owner TIANJIN VOCATIONAL INST
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