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Hyperbranched crude oil pour point depressant with inner salt structure as well as preparation method and application of hyperbranched crude oil pour point depressant

A crude oil pour point depressant and reaction technology, which is used in mechanical equipment, gas/liquid distribution and storage, pipeline systems, etc., to achieve stable product performance and universality.

Inactive Publication Date: 2018-06-29
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Hyperbranched crude oil pour point depressant with internal salt structure has not been reported yet

Method used

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  • Hyperbranched crude oil pour point depressant with inner salt structure as well as preparation method and application of hyperbranched crude oil pour point depressant
  • Hyperbranched crude oil pour point depressant with inner salt structure as well as preparation method and application of hyperbranched crude oil pour point depressant
  • Hyperbranched crude oil pour point depressant with inner salt structure as well as preparation method and application of hyperbranched crude oil pour point depressant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Example 1. Preparation of hyperbranched crude oil pour point depressant with internal salt structure

[0065] (1) Preparation of zwitterion-containing monomer: 12g 4-vinylpyridine and 10g 1,3-propane sultone are prepared by ring-opening polymerization under the action of 2g hydrochloric acid, reaction temperature 80℃, and reaction time 8 hours. Ionic monomer (abbreviated as VPPS, the structural formula is shown in the above formula I);

[0066] (2) Dissolve 71gVA and 12gVPPS in 400g H 2 O, mechanical stirring, pass condensate water, pass in N 2 ; Raise temperature to 45℃, inject CeCl 3 30mg, react for 1.5 hours;

[0067] (2) Inject 5.4mg HPG and add 30mg CeCl 3 , React for 1.5 hours, and keep at 45℃;

[0068] (3) Add 2g of VA and 1g of VPPS, add 2g of fluorocarbon amphiphilic surfactant, and react for 1.5 hours;

[0069] (4) Place the reactor in an oven at 80°C for 4 hours.

[0070] (5) Take out the reactor and add 16.0g NaOH to it, pass the condensed water, mechanically stir, an...

Embodiment 2

[0077] Example 2. Preparation of hyperbranched crude oil pour point depressant with internal salt structure

[0078] (1) Preparation of zwitterionic monomers: 14g vinylpyridine and 14g 1,3-propane sultone are prepared by ring-opening polymerization under the action of 4g hydrochloric acid at a reaction temperature of 90°C and a reaction time of 6 hours;

[0079] (2) Dissolve 68gVA and 16gVPPS in 390g H 2 O, mechanical stirring, pass condensate water, pass in N 2 ; Heat up to 50℃, inject CeCl 3 40mg, react for 2 hours;

[0080] (3) Inject 5.0mg HPG and add 40mg CeCl 3 , React for 2 hours and keep at 50℃;

[0081] (4) Add 3g VA and 1.5g VPPS, add 3g fluorocarbon amphiphilic surfactant, and react for 2 hours;

[0082] (5) Place the reactor in an oven at 90°C for 6 hours.

[0083] (6) Take out the reactor and add 16.8g NaOH to it, pass condensed water, mechanically stir, and hydrolyze at 120°C for 4 hours to obtain a hyperbranched crude oil pour point depressant with internal salt structure....

Embodiment 3

[0090] Example 3. Preparation of hyperbranched crude oil pour point depressant with internal salt structure

[0091] (1) Preparation of zwitterionic monomers: 16g vinyl pyridine and 14g 1,3-propane sultone were prepared by ring-opening polymerization under the action of 4g hydrochloric acid, reaction temperature 90°C, reaction time 7 hours;

[0092] (2) Dissolve 72gVA and 14g VPPS in 400g H 2 O, mechanical stirring, pass condensate water, pass in N 2 ; Raise the temperature to 48℃ and inject CeCl 3 35mg, react for 2 hours;

[0093] (3) Inject 6.0mg HPG and supplement 35mg CeCl 3 , React for 1.5 hours, and keep at 48℃;

[0094] (4) Add 2.5g VA1.25g VPPS, add 2.5g fluorocarbon amphiphilic surfactant, and react for 1.5 hours;

[0095] (5) Place the reactor in an oven at 85°C for 5 hours.

[0096] (6) Take out the reactor and add 17g NaOH to it, pass the condensed water, mechanically stir, and hydrolyze at 130°C for 3 hours to obtain a hyperbranched crude oil pour point depressant with inter...

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Abstract

The invention discloses a hyperbranched crude oil pour point depressant with an inner salt structure as well as a preparation method and an application of the hyperbranched crude oil pour point depressant. The method comprises following steps: (1), 4-vinylpyridine and 1,3-propane sultone are mixed and subjected to a ring-opening reaction, and a monomer containing zwitterions is obtained, wherein the structural formula of the monomer is represented as the formula I in the description; (2), vinyl acetate and the monomer containing the zwitterions and shown as the formula I are dissolved in water, and cerium salt is added for a reaction; (3), hydroxyl-terminated polyether ester polyol and cerium salt are added to a reaction system of the step (3), and a reaction is performed; (5), the reaction system of the step (4) is dried, a hydrolysis reaction is performed, and the hyperbranched crude oil pour point depressant with the inner salt structure is obtained. With adoption of the pour pointdepressant with the inner salt structure, adaptability of the crude oil pour point depressant can be improved, interaction of the pour point depressant and crude oil is increased, and the pour point depressant has higher universality accordingly.

Description

Technical field [0001] The invention relates to a hyperbranched crude oil pour point depressant with an internal salt structure and a preparation method and application thereof, belonging to the field of petrochemical industry. Background technique [0002] The pour point depressant method is the main method in the transportation of waxy crude oil. It is to add chemical treatment agents to change the form of wax crystals in the crude oil, so that the wax is not easy to form a three-dimensional spatial network structure at room temperature to achieve pour point depressing and improvement The purpose of low temperature fluidity of crude oil. Adding a pour point depressant has simple operation, low equipment investment, and does not require post-processing, which is convenient for automatic management of the oil transportation process, and is also convenient for use in the offshore oil extraction and gathering and transportation processes. Therefore, adding a chemical pour point de...

Claims

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Application Information

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IPC IPC(8): C08G83/00F17D1/16
CPCC08G83/006F17D1/16Y02E60/34
Inventor 吕鑫李清平梁守成李强刘永飞程兵姚海元
Owner CHINA NAT OFFSHORE OIL CORP
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