A low-temperature crude oil pour point depressant with pH response and a preparation method thereof

By preparing a pH-responsive low-temperature crude oil pour point depressant, the adaptability problem of existing pour point depressants under different pH values ​​and complex hydrochemical properties has been solved, achieving effective pour point depressing in deep sea and cold regions, and improving the safety and efficiency of crude oil transportation.

CN122103462APending Publication Date: 2026-05-29YONGJIAN (NINGBO) ENERGY TECHNOLOGY DEVELOPMENT CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
YONGJIAN (NINGBO) ENERGY TECHNOLOGY DEVELOPMENT CO LTD
Filing Date
2026-04-03
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing pour point depressants lack the ability to adapt to different pH values ​​and complex hydrochemical properties. They cannot effectively adapt to environmental changes in deep sea and high-altitude cold conditions, leading to decreased crude oil fluidity and equipment wear.

Method used

A pH-responsive low-temperature crude oil pour point depressant was prepared by modifying polyvinyl alcohol with a pH-sensitive monomer through polymerization. It can adjust the hydrophilicity and hydrophobicity at different pH values ​​to disrupt the crystalline structure of wax crystals and improve fluidity.

Benefits of technology

It significantly lowers the freezing point of crude oil in low-temperature environments, adapts to the transportation needs of deep sea and cold regions, improves transportation efficiency and safety, reduces leakage risks, and enhances the economic benefits of the petroleum industry.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application belongs to the technical field of materials, and provides a low-temperature crude oil pour point depressant with pH response and a preparation method thereof. Polymethyl acrylate and polyvinyl alcohol are dissolved in an organic solvent, a pH-sensitive monomer is added, and then mixed sufficiently under an inert atmosphere, and then the product is prepared through initiator polymerization, precipitation, separation and drying. The pour point depressant is modified by the pH-sensitive monomer, and the hydrophilicity and hydrophobicity can be dynamically adjusted according to the pH value of the environment. In an acidic environment, the pour point depressant promotes the dissolution of wax, and in an alkaline environment, the pour point depressant inhibits the growth of wax crystals, thereby significantly reducing the freezing point of crude oil. The pour point depressant has good stability in a humid and high-temperature environment, can effectively adapt to extreme conditions such as deep sea, high cold and high altitude, improves the efficiency of oil and gas exploitation and transportation, reduces the risk of wax precipitation, improves economic benefits, has environmental protection value, and provides an innovative solution to the problem of crude oil transportation.
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