Crude oil viscosity-breaking pour-point depressant composition, and preparation method and application thereof

A technology of pour point depressant and composition, which is applied in the field of petroleum transportation, and can solve the problems of unfavorable on-site dispensing of oil transportation, increasing transportation cost of pour point depressant, and affecting oil products, etc.

Active Publication Date: 2011-07-20
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore often need pre-dispersed in inert organic solvent; For example CN 1141372C (patent No. ZL 00135876.6) discloses a kind of by ethylene-vinyl acetate copolymer, acrylate higher carbon ester-maleic anhydride-vinyl acetate copolymer, acrylic acid A liquid crude oil pour point depressant prepared in proportion to various organic polymers such as high-carbon alcohol ester polymers, epoxy resins and polyethers, and organic solvents. CN 101100599A (application number 200610090684.4) discloses a kind of organic solvent, dispersion aid , polymer pour point depressant (or further including thickener, stabilizer) compounded oil-soluble pour point depressant suspension; although they are convenient to use, due to the use of a large amount of organic solvent as the dispersion medium, the increase of The transportation cost of pour point depressant, and it may affect the oil product
More importantly, the above-mentioned technologies cannot overcome the inherent disadvantages of organic pour point depressants:
[0006] 1. After adding the pour point depressant, the temperature rise of waxy crude oil has a great influence on the rheology at low temperature, and there is a temperature rise deterioration area;
[0007] 2. The problem of shear resistance of the pour point depressant: During the long-distance transportation of crude oil, after short-term intense shearing by multiple intermediate station oil pumps and long-term medium-low speed shearing by the pipeline flow, the performance of the pour point depressant The effect decreases, leading to the increase of the freezing point and viscosity of crude oil, making it difficult to fully meet the safe operation conditions of the pipeline;
[0008] 3. After treatment with pour point depressant, the static stability of waxy crude oil is shorter, an

Method used

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  • Crude oil viscosity-breaking pour-point depressant composition, and preparation method and application thereof
  • Crude oil viscosity-breaking pour-point depressant composition, and preparation method and application thereof
  • Crude oil viscosity-breaking pour-point depressant composition, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Inorganic pour point depressant and organic pour point depressant are the same as in comparative example 1.

[0060] Premix 1000g of inorganic pour point depressant and 1000g of organic pour point depressant in a high-speed mixer at room temperature, and then melt, blend, extrude and granulate through a twin-screw extruder at 160-190°C to obtain organic-inorganic hybrid Crude oil viscosity reducer composition 1.

[0061] Add 1 g of Composition 1 to 99 g of diesel oil, and stir mechanically at 60°C for 2 hours to uniformly disperse Composition 1 in the diesel oil to form an inorganic-organic hybrid viscosity depressant composition 1 with a concentration of 1% by mass of the dispersion.

[0062] Add 1g of the dispersion of the above composition 1 to 100g of crude oil, control the temperature at about 64°C, and mechanically stir at a speed of 500rpm for 5 minutes, so that the composition 1 is uniformly dispersed in the crude oil to form the added crude oil, and its freezi...

Embodiment 2

[0069] Inorganic pour point depressant and organic pour point depressant are the same as in comparative example 2.

[0070] At room temperature, 1000g of organic montmorillonite, 1000g of EVA, and 20g of silane coupling agent γ-aminopropyltriethoxysilane (KH-550) are pre-mixed in a high-speed mixer, and then passed through the A single-screw extruder is melted, blended, extruded and granulated to obtain an inorganic-organic hybrid crude oil viscosity and pour point depressant composition 2.

[0071] Add 5 g of Composition 2 to 95 g of kerosene, and stir mechanically at 75°C for 1.5 hours to uniformly disperse Composition 2 in the kerosene to form an inorganic-organic hybrid viscosity depressant composition 2 with a concentration of 5% by mass of the dispersion.

[0072] Add 0.2g of the dispersion of the above composition 2 to 100g of crude oil, control the temperature at about 60°C, and mechanically stir at a speed of 1000rpm for 5 minutes to make the composition 2 uniformly ...

Embodiment 3

[0074] Inorganic pour point depressant and organic pour point depressant are the same as in comparative example 2.

[0075] Premix 1000g organic montmorillonite, 1000g EVA, and 50g lubricant ethylene bisstearamide (EBS) in a high-speed mixer at room temperature, and then melt blend them through a twin-screw extruder at 160-190°C Extrude and granulate to obtain an inorganic-organic hybrid crude oil viscosity and pour point depressant composition 3.

[0076] Add 5 g of Composition 3 to 95 g of kerosene, and mechanically stir at 75°C for 1.5 hours to uniformly disperse Composition 3 in the kerosene to form an inorganic-organic hybrid viscosity depressant composition 3 with a concentration of 5% by mass of the dispersion.

[0077] Add 0.2 g of the dispersion of the above composition 3 to 100 g of crude oil, control the temperature at about 60 ° C, and mechanically stir at a speed of 1000 rpm for 5 minutes, so that the composition 3 is uniformly dispersed in the crude oil to form ...

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Abstract

The invention belongs to the field of oil transportation, and particularly relates to a crude oil viscosity-breaking pour-point depressant composition, and a preparation method and application thereof. At the temperature of higher than plasticizing temperature of organic pour-point depressant, 0-3% by mass of coupling agent, 0-10% by mass of high-molecular processing assistant, and the balance ofinorganic pour-point depressant and organic pour-point depressant are melted, uniformly mixed and granulated to obtain the crude oil viscosity-breaking pour-point depressant composition. The crude oil viscosity-breaking pour-point depressant composition is uniformly dispersed in a liquid dispersion medium, and proportionally injected into crude oil, so that the crude oil can be transported. The inorganic pour-point depressant and organic pour-point depressant in the crude oil viscosity-breaking pour-point depressant composition have a synergetic effect, and can effectively lower the solidifying point and viscosity of the waxy crude oil, so that the crude oil has favorable fluidity at low temperature and favorable rheologic timeliness, thereby enhancing the crude oil transportation efficiency and safety level and lowering the transportation cost.

Description

technical field [0001] The invention belongs to the field of petroleum transportation, and in particular relates to a crude oil viscosity and pour point depressant composition composed of an inorganic pour point depressant and an organic pour point depressant, and a preparation method and application of the crude oil viscosity and pour point depressant composition. Background technique [0002] Petroleum crude oil is a multi-component complex hydrocarbon mixture containing paraffin, and also contains a certain amount of gum and asphaltenes. Paraffin wax is easy to dissolve in crude oil, and will precipitate from crude oil when the temperature drops, forming wax crystals; and as the temperature drops, the wax crystals increase to form a three-dimensional network structure, which makes the crude oil lose its fluidity and hinders oil extraction and conveyor belts. Come very difficult. my country's crude oil resources are generally high in wax content, most of which are paraffi...

Claims

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Application Information

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IPC IPC(8): C09K8/58C09K8/524
Inventor 阳明书张世民丁艳芬王峰
Owner INST OF CHEM CHINESE ACAD OF SCI
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