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A crude oil nano-viscosity reducer composition and its preparation method and application

The technology of pour point depressant and composition is applied in the field of crude oil nano-viscosity pour point depressant composition and its preparation, which can solve problems such as troublesome operation, and achieve the effects of long thixotropic time, low viscosity recovery and low modulus.

Active Publication Date: 2019-05-28
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are also some shortcomings. Nano-scale substrates are prone to self-agglomeration, which requires special dispersion equipment and troublesome operation.

Method used

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  • A crude oil nano-viscosity reducer composition and its preparation method and application
  • A crude oil nano-viscosity reducer composition and its preparation method and application
  • A crude oil nano-viscosity reducer composition and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Use a twin-screw extruder to make unmodified montmorillonite (MMT) and EVA into granules of pour point depressant in a ratio of 6:4, and prepare the obtained pour point depressant into a 1% (weight percent) diesel solution at 10000ppm Add the above-mentioned diesel oil solution to the waxy crude oil, and treat it at 60°C and 200rpm for 15 minutes under the action of mechanical stirring, so that the pour point depressant is evenly dispersed in the crude oil, and test the condensation point of the added crude oil with a pour point meter and a rheometer. point, apparent viscosity at 25°C, and changes in viscosity and freezing point after storage at 35°C.

Embodiment 2

[0040] Modified silica (G-SiO 2 ), EVA, maleic anhydride grafted EVA are made into the pour point depressant granules in the ratio of 20:50:30, the obtained pour point depressant is made into 1% (percentage by weight) diesel oil solution, and above-mentioned diesel oil solution is mixed by the concentration of 10000ppm Add it to waxy crude oil, and treat it under mechanical stirring at 60°C and 200rpm for 15 minutes, so that the pour point depressant is evenly dispersed in the crude oil. The apparent viscosity, as well as the viscosity and freezing point changes after storage at 35°C.

Embodiment 3

[0042] Modified calcium carbonate (G-CaCO 3 ), EVA, itaconic anhydride grafted EVA are made into the pour point depressant particle in the ratio of 25:45:30, the pour point depressant obtained is made into the diesel oil solution of 1% (percentage by weight), and above-mentioned diesel oil solution is mixed by the concentration of 10000ppm Add it to waxy crude oil, and treat it under mechanical stirring at 60°C and 200rpm for 15 minutes, so that the pour point depressant is evenly dispersed in the crude oil. The apparent viscosity, as well as the viscosity and freezing point changes after storage at 35°C.

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Abstract

The invention belongs to the field of oil industry, and particularly relates to a nanometer viscosity and pour point reducer composition for crude oil and a preparation method and application of nanometer viscosity and pour point reducer composition. The preparation method comprises the steps that an inorganic nanometer pour point reducer, an organic pour point reducer, a graft polymer, a coupling agent and a macromolecular processing auxiliary agent are uniformly mixed through melt blending in proportion at the temperature higher than the plasticizing temperature of the organic pour point reducer, a mixture is granulated, and the solid granular nanometer viscosity and pour point reducer composition for the crude oil is obtained. The composition is uniformly dispersed into a liquid dispersing medium and then added into the crude oil, and the viscosity and the pour point of the crude oil are significantly reduced; in addition, after the crude oil is stored at a low temperature 3-6 months, the pour point and viscosity recovery amplitude is small, the thixotropic time is long, and the modulus is low when jelling is generated.

Description

technical field [0001] The invention belongs to the field of petroleum industry, and in particular relates to a crude oil nano-viscosity reducer composition and a preparation method and application thereof. Background technique [0002] Crude oil is a complex mixed system composed of paraffin, colloid, asphaltenes, aromatic hydrocarbons and light hydrocarbons, among which the paraffin component is the main factor affecting the fluidity of waxy crude oil. At a higher temperature, paraffin wax dissolves in liquid crude oil and has better fluidity; as the temperature decreases, the wax gradually crystallizes out, and the wax crystals form a three-dimensional network structure through cross-linking, and the crude oil gels and loses fluidity. The extraction and transportation of oil pose great difficulties. Traditionally, this type of crude oil is transported by heating station by station, but this method requires a large investment in equipment, high fuel and power consumption,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17D1/16C09K8/58C09K8/588
CPCC09K8/58C09K8/588F17D1/16
Inventor 阳明书丁艳芬王峰陈娟张世民
Owner INST OF CHEM CHINESE ACAD OF SCI