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A kind of preparation method of anti-wax deposition pipeline

A pipeline and wax-proof technology, applied in coatings, polyether coatings, etc., can solve problems such as high energy consumption, achieve resource and energy conservation, reduce turbulence, and reduce water resistance

Active Publication Date: 2022-04-19
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method not only needs to consume a lot of material to wrap the heating wire on the pipe, but also consumes a lot of energy during use.

Method used

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  • A kind of preparation method of anti-wax deposition pipeline
  • A kind of preparation method of anti-wax deposition pipeline
  • A kind of preparation method of anti-wax deposition pipeline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The inner wall of the HDPE pipe was treated with a plasma processor, and the treatment conditions were: treatment at 80V for 90s.

[0029] 26.45g of PEG 600 Dry in a vacuum oven at 60°C for 12h, add the treated PEG to a 50ml round-bottomed flask, heat it to 75°C in an oil bath, while continuously passing nitrogen, and slowly add 7.15g of IPTS dropwise to the In the flask, the product PEG-(SiR was obtained after 12h of reaction 2 O) 3 (The infrared spectrum of the product is shown in figure 1 shown).

[0030] PEG-(SiR 2 O) 3 Diluted with water to a solid content of 5%, hydrolyzed by a magnetic stirrer at a pH of 4 to 5 for 2 hours, and then immersed the plasma-treated HDPE in the hydrolyzed PEG-(SiR 2 O) 3 For 1 h, put the treated HDPE into an oven at 120 °C for 30 min, rinse with plenty of water to remove free PEG-(SiR on the surface) 2 O) 3 to HDPE with anti-wax deposition (infrared spectrum of the sample surface as shown in figure 2 As shown, the underwater...

Embodiment 2

[0033] Others are the same as in Example 1, change PEG-(SiR 2 O) 3 The solid content of , the relationship between the solid content and the contact angle of the final product is as follows Figure 5 shown.

Embodiment 3

[0035] The HDPE surface is plasma treated, and the contact angle before and after wax deposition is as follows Figure 4 As shown, the contact angle of the underwater oil droplet is as follows image 3 shown.

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PUM

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Abstract

The invention discloses a preparation method of an anti-wax deposition pipeline, which is implemented according to the following steps: (1) treating the inner wall of the pipeline with plasma to generate a large amount of hydroxyl groups on the surface; (2) preparing PEG-(SiR 2 O) 3 : Polyethylene glycol (PEG) is dried, and then polyethylene glycol and isocyanate propyltriethoxysilane (IPTS) are mixed in proportion under nitrogen atmosphere, so that the hydroxyl and isocyanate in polyethylene glycol The molar ratio of isocyanic acid in cyanate propyltriethoxysilane is 2‑4:1, reacted for 11‑13h under the condition of 70‑80°C to obtain PEG‑(SiR 2 O) 3 , wherein R is an ethyl group; (3) PEG‑(SiR 2 O) 3 After diluting with water, hydrolyze for 1.5-2.5h in an environment of pH 4-5, then apply the hydrolyzed solution to the surface of the polyethylene pipe after plasma treatment, dry the coated polyethylene pipe, and wash with water to remove free surface PEG‑(SiR 2 O) 3 , to obtain anti-wax deposition pipes. The method provided by the invention to make the pipeline have the effect of preventing wax deposition consumes less resources, saves energy and is effective for a long time.

Description

(1) Technical field [0001] The invention relates to a preparation method of a pipeline for preventing wax deposition. (2) Background technology [0002] In the process of producing crude oil in the oil field, a large amount of waste water will be produced, and the wax in the waste water in winter will be precipitated due to low temperature, and because the wax has good compatibility with polyethylene, the precipitated wax will be deposited on the inner wall of the pipeline. The passage of time will cause the pipeline to be blocked, resulting in the backflow of waste water, and the stagnation of production will cause a lot of economic losses, and even more harm to the personal safety of employees. (None.Distance no problem for oil transportation[J].WorldPumps,2013,2013(7-8):26-28.) [0003] In order to prevent the pipeline from being blocked due to wax deposition, the most common method at present is to wrap a heating wire on the wall of the pipeline, and heat the pipeline t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/04C08J7/056C08J7/12C09D171/02C08G65/336C08L23/06
CPCC08J7/123C09D171/02C08G65/336C08J2323/06C08J2471/02C08J7/0427
Inventor 冯杰张静吕健祝晨曦
Owner ZHEJIANG UNIV OF TECH
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