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Composition for crude oil point depressant, crude oil point depressant, preparation method and application

A crude oil pour point depressant and composition technology, which is applied in mechanical equipment, pipeline system, gas/liquid distribution and storage, etc. Good deposition and dissolution properties

Active Publication Date: 2020-09-04
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the present invention, the inventors have found that there are at least the following problems in the prior art: the existing pour point depressant has a good pour point depressing effect for crude oil with only one wax precipitation temperature peak, but for crude oil with two or two Crude oil with more than 3 peaks of wax precipitation temperature, especially for crude oil containing microcrystalline wax, the existing pour point depressant has poor pour point depressant effect

Method used

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  • Composition for crude oil point depressant, crude oil point depressant, preparation method and application
  • Composition for crude oil point depressant, crude oil point depressant, preparation method and application
  • Composition for crude oil point depressant, crude oil point depressant, preparation method and application

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preparation example Construction

[0054] In the third aspect, the embodiment of the present invention provides a method for preparing the above-mentioned pour point depressant for crude oil, which specifically includes the following steps:

[0055] The components of the composition for crude oil pour point depressant in the first aspect of the embodiment of the present invention are uniformly mixed and then added to the extruder, and passed through 145-155°C, 170-180°C, 190-200°C, The heating zone of 215-225°C and 255-265°C is extruded and molded, dried and pelletized to obtain a pelletized crude oil pour point depressant.

[0056] Among them, a high-speed mixer can be used to mix the components in the composition of the crude oil pour point depressant uniformly, and the mixing time can be 5-15 minutes.

[0057] The extruder can be a co-rotating twin-screw extruder.

[0058] In the temperature range of 145 to 155°C, the heating temperature may specifically be 145°C, 146°C, 148°C, 150°C, 152°C, 154°C, 155°C, etc.

[005...

Embodiment 1

[0081] This embodiment provides a granular crude oil pour point depressant, and the preparation method of the crude oil pour point depressant is as follows:

[0082] The weight is 520 grams of EVA28 / 40, 170 grams of EVA28 / 150, 140 grams of EVA28 / 400, 90 grams of EVA42 / 60, 40 grams of octadecyl anthracene oil and 30 grams of behenyl anthracene The oil sulfonate is added to the high-speed mixer and fully mixed for 10 minutes, and then transferred to the co-rotating twin-screw extruder, passing through the heating zone at 150°C, 175°C, 195°C, 220°C, and 260°C, and finally through the extrusion port After extrusion molding, drying and pelletizing, a granular crude oil pour point depressant is obtained, which is recorded as pour point depressant 1.

Embodiment 2

[0084] This embodiment provides a paste-like crude oil pour point depressant, and the preparation method of the crude oil pour point depressant is as follows:

[0085] The weight of 500 grams of EVA28 / 40, 200 grams of EVA28 / 150, 130 grams of EVA28 / 400, 100 grams of EVA42 / 60, 40 grams of octadecyl anthracene oil and 30 grams of behenyl anthracene The oil sulfonate is added to the high-speed mixer and fully mixed for 10 minutes, then transferred to the co-rotating twin-screw extruder, passes through the 152℃, 173℃, 193℃, 222℃, and 263℃ heating zones in sequence, and finally passes through the extrusion port Extrusion, drying, and pelletizing to obtain a granular crude oil pour point depressant. Then, at 50℃, the granular crude oil pour point depressant and toluene were mixed in a mixing kettle for 30 minutes to obtain a paste crude oil pour point depressant. For pour point depressant 2.

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Abstract

The invention discloses a composition for crude oil pour point depressant, a crude oil pour point depressant, a preparation method and application thereof. The composition for the crude oil pour pointdepressant comprises the following components of, by weight, 40-60 parts of ethylene-vinyl acetate copolymer, wherein the mass content of vinyl acetate is 28%, and the melt index is 40g / 10min; 10-20parts of ethylene-vinyl acetate copolymer, wherein the mass content of vinyl acetate is 28%, and the melt index is 150g / 10min; 10-15 parts of ethylene-vinyl acetate copolymer, wherein the mass contentof vinyl acetate is 28%, and the melt index is 400g / 10min; 5-10 parts of ethylene-vinyl acetate copolymer, wherein the mass content of vinyl acetate is 42%, and the melt index is 60g / 10min; 2-5 partsof octadecyl anthracene oil; and 2-3 parts of didodecyl anthracene oil sulfonate. The composition has a good condensation effect on the crude oil with two or more than two wax precipitation temperature peaks, and particularly, the crude oil containing microcrystalline wax.

Description

Technical field [0001] The invention relates to the technical field of crude oil pour point depressant, in particular to a composition for crude oil pour point depressant, crude oil pour point depressant, preparation method and application. Background technique [0002] The wax content of most crude oils in my country is 15% to 37%, and can even reach more than 40%, which belongs to high waxy crude oil. Highly waxy crude oil usually has a higher freezing point. As the temperature of the crude oil decreases, the wax in it will crystallize and eventually cause the crude oil to solidify and lose its fluidity, which brings difficulties to the extraction and transportation of crude oil. Therefore, it is of great significance to reduce the freezing point of crude oil and improve its fluidity. Adding a pour point depressant to crude oil is an effective way to reduce the freezing point of crude oil. The principle of the pour point depressant to reduce the freezing point of crude oil is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17D1/17
CPCF17D1/17
Inventor 李世洪孙岩聂志泉李国辉楚海强王兴旺姜雄何芳
Owner BC P INC CHINA NAT PETROLEUM CORP