Synthesis of cyclohexanone-alcohol hemiketals and evaluation as flow improver for waxy crude oil

Abstract

In this paper, four novel cyclohexanone-alcohol hemiketals (KL-1, KL-2, KL-3, KL-4) as waxy crude oil flow improver have been prepared by cyclohexanone and 1-pentanol, 1-Hexanol, 1-heptanol, 1-octanol. Evaluation results demonstrate the hemiketal compounds have obvious effect on the viscosity and pour point of Henan crude oil. DSC analysis showed that waxing point and waxing peak decreased to a certain degree in 0.05% hemiketal solutions. Wax crystal morphology analysis indicated the four hemiketals played a role of nucleation in the process of waxy crude oil decoagulation, and in that way acts as waxy crude oil flow improver.

Keywords:

• crude oil
• flow improver
• hemiketal
• pour point
• viscosity

Acknowledgments

The authors would like to thank the Open Fund (PLC20190703) of State Key Laboratory of Oiland Gas Reservoir Geology and Exploitation (Chengdu University of Technology, Open Fund (PLN201814) of the State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Southwest Petroleum University), Open Research Fund Program of Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring (Central South University), Ministry of Education (2018YSJS06), Project (2018M643524) funded by China Postdoctoral Science Foundation for financial support.

Additional information

Funding

Project funded by Open Fund of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Chengdu University of Technology), Open Fund of the State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Southwest Petroleum University); Open Research Fund Program of Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring (Central South University), Ministry of Education for financial support; China Postdoctoral Science Foundation for financial support.