Preparation method for wax inhibitor and pour point depressant, and wax inhibitor and pour point depressant
By preparing a wax-resistant pour point depressant, which is generated by the polymerization and hydrolysis of long-chain α-olefins, long-chain acrylates and maleic anhydride, the problem of decreased crude oil fluidity and blockage caused by paraffin precipitation is solved, thereby improving production efficiency and reducing costs.
WO2026138442A1PCT designated stage Publication Date: 2026-07-02PETROCHINA CO LTD
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- PETROCHINA CO LTD
- Filing Date
- 2025-12-04
- Publication Date
- 2026-07-02
AI Technical Summary
Technical Problem
Paraffin wax precipitates and deposits in crude oil, leading to decreased crude oil fluidity, oil pipeline blockage, reduced production efficiency, and increased production costs.
Method used
A wax-resistant pour point depressant was prepared by polymerizing long-chain α-olefins, long-chain acrylates, and maleic anhydride to form a target polymer, which was then hydrolyzed with sodium hydroxide solution. The resulting wax-resistant pour point depressant interacts with wax crystals, interferes with wax crystal growth, changes the surface polarity of wax crystals, and inhibits wax crystal aggregation and growth.
Benefits of technology
Improve crude oil fluidity, prevent wax crystal blockage, increase production efficiency, and reduce production costs.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure PCTCN2025140187-FTAPPB-I100001 
Figure PCTCN2025140187-FTAPPB-I100002
Abstract
The present invention relates to the technical field of petroleum exploitation and provides a preparation method for a wax inhibitor and pour point depressant, and a wax inhibitor and pour point depressant. The preparation method for a wax inhibitor and pour point depressant provided by the present invention comprises the following steps: separately dissolving a long-chain α-olefin, a long-chain acrylate, and maleic anhydride into an organic solvent, and adding a polymerization initiator to the organic solvent to perform a polymerization reaction to form a target polymer; and mixing the target polymer with a sodium hydroxide solution to perform a hydrolysis reaction to obtain the wax inhibitor and pour point depressant. The present invention provides a preparation method for a wax inhibitor and pour point depressant, and a wax inhibitor and pour point depressant. The wax inhibitor and pour point depressant prepared by means of the method can improve crude oil production efficiency and reduce production costs.
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