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Preparation method of low-temperature stable poly-alpha olefin oil product resistance reducer suspension system

A technology of low temperature stability and drag reducing agent, applied in the field of preparation of drag reducing agent suspension system, can solve the problems of increasing injection difficulty and production cost, obvious layering phenomenon, short storage time, etc., and achieves low cost, simple process and stable The effect of storage time

Inactive Publication Date: 2017-03-29
段恒宇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This post-treatment method is anti-freeze, has a high content of active polymer, has good thermal stability, and has a simple operation process and does not require other stabilization systems, but it also has disadvantages such as short storage time and toxicity.
[0004] In extremely cold regions such as Northeast China, Siberia in Russia, and Alaska in the United States, there is a large demand for drag reducers in winter, but conventional drag reducer suspensions are prone to gelation, increased viscosity, and obvious stratification in low-temperature environments. , or exhibit certain thixotropic characteristics, resulting in difficulty in injection. For this reason, steps such as stirring and heating before injection will be added, which greatly increases the difficulty of injection and production cost

Method used

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  • Preparation method of low-temperature stable poly-alpha olefin oil product resistance reducer suspension system

Examples

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Effect test

Embodiment 1

[0044] Add 100g of deionized water, 3000g of ethanol, 3000g of ethylene glycol, and 300g of n-heptane with a resistivity of 18MΩ·cm into a closed container, and stir and mix evenly at 180rad / min. Under heating at 45°C, add 30g of dodecyl 2-acrylate, 30g of hexadecyl methacrylate, 35g of benzenesulfonyl hydrazide, 35g of acetylhydrazide and 4g of zinc citrate, and stir evenly. Add 65g of emulsified silicone oil and 70g of polyoxyethylene polyoxypropanolamine ether, stir evenly at 60rad / min to form a dispersion, and cool to room temperature for use. Polyα-olefins with a molecular weight of 5 million to 8 million are treated in an oven at 90°C for 24 hours, quickly transferred to liquid nitrogen, taken out after 10 minutes, pulverized with a ball mill, passed through a 80-mesh sieve, and 2200g of the undersieve is quickly added to 600g The calcined clay and 100g of aluminum oxide were stirred by a paddle stirring device at 60 rad / min. Add it into the dispersion liquid at -30°C, ...

Embodiment 2

[0046]Add 120g of deionized water with a resistivity of 6.7MΩ·cm, 4000g of ethanol, 4000g of ethylene glycol, and 300g of n-heptane into a closed container, and stir and mix evenly at 240rad / min. Under heating conditions at 55°C, add 27g of dodecyl 2-acrylate, 27g of hexadecyl methacrylate, 27g of perfluoroalkyl ethyl acrylate, 50g of magnesium dodecyl sulfate, 50g of acetaldehyde n-propyl Thiol acetal, 2.5g gelatin and 2.5g sodium alginate, stir well. Add 75g of emulsified silicone oil and 85g of polyoxypropylene glyceryl ether, stir evenly at 60rad / min to form a dispersion, and cool to room temperature for later use. Polyα-olefins with a molecular weight of 5 million to 8 million are treated in an oven at 90°C for 36 hours, quickly transferred to liquid nitrogen, taken out after 20 minutes, pulverized with a ball mill, passed through a 60-mesh sieve, and 2600g of the undersieve is taken and quickly added to 300g Aluminum oxide, 300g calcium stearate, and 100g magnesium stea...

Embodiment 3

[0048] Add 110g of deionized water with a resistivity of 13.2MΩ·cm, 3500g of ethanol, 3500g of ethylene glycol, and 300g of n-heptane into a closed container, and stir at 180rad / min to mix evenly. Under the condition of heating at 50°C, 76g of polylaurate methacrylate, 45g of benzenesulfonyl hydrazide, 45g of ethanedithiol and 4.5g of sodium alginate were added and stirred evenly. Add 75g of polyoxyethylene polyoxypropanolamine ether and 80g of polydimethylsiloxane, and stir at 60rad / min to form a dispersion liquid, which is cooled to room temperature for use. Polyα-olefins with a molecular weight of 5 million to 8 million are treated in an oven at 90°C for 30 hours, quickly transferred to liquid nitrogen, taken out after 20 minutes, crushed with a ball mill, passed through a 60-mesh sieve, and 2400g of the undersieve is taken and quickly added to 100g Al2O3 and 700g talc are stirred at 90rad / min by a paddle stirring device. Add it to the dispersion at -25°C, then add 6g n-oc...

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Abstract

The invention discloses a preparation method of a low-temperature stable poly-alpha olefin oil product resistance reducer suspension system and belongs to the technical field of preparation of suspension systems and pipeline systems. The method comprises the following steps: firstly carrying out treatment of massive poly-alpha olefin under high temperature, then rapidly crushing poly-alpha olefin under low temperature, externally applying isolation powder, preparing a solvent from water, alcohol and an alkane compound solution, and simultaneously adding fillers such as pour-point depressants, defoaming agents and cold-resistant plasticizers and the like to prepare the oil product resistance reducer suspension system which is stable under low temperature and is not layered for a long time. The low-temperature stable poly-alpha olefin oil product resistance reducer suspension system prepared by the method is high in dispersibility, long in stable storage time and low in preparation cost, and can be adapted to the ultralow-temperature environment in winter in extremely-cold regions; the process steps of treating before pouring are reduced; the pouring efficiency is improved.

Description

technical field [0001] The invention discloses a method for preparing a suspension system of a low-temperature stable polyalpha-olefin oil drag reducer, and belongs to the field of preparation of the drag reducer suspension system. Background technique [0002] Most industrially produced drag reducers are produced by bulk polymerization, and the products are generally polyalphaolefin block solids, which cannot be directly added to oil pipelines as products, so post-treatment of drag reducers is very important. At present, the most commonly used process is to prepare a suspension system and directly inject it into the pipeline through a pump. The post-treatment of the drag reducer mainly includes two steps of freezing pulverization and solvent dispersion. Firstly, it is frozen and pulverized. In order to prevent the powder particles from sticking together, some powdery dispersant is often added to ensure the dispersion effect. Then disperse the pulverized powder into a solv...

Claims

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Application Information

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IPC IPC(8): F17D1/16
CPCF17D1/16
Inventor 段恒宇路殿勋路术松程长起程学宇程学峰
Owner 段恒宇
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