Method for predicting viscosity property of narrow fraction based on wide fraction composition of lubricant base oil

By establishing a viscosity property prediction model based on hydrocarbon number distribution data, the problem of difficulty in predicting the viscosity properties of narrow fractions after cutting of wide-distillate base oil in the prior art is solved, and a rapid and accurate prediction of viscosity properties in lubricating oil production process is achieved.

CN119724403AActive Publication Date: 2025-03-28PETROCHINA CO LTD
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Patent Information

Application Number
CN202311250658.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-09-26
Publication Date
2025-03-28
Estimated Expiration
2043-09-26

AI Technical Summary

Technical Problem

The prior art is difficult to predict the viscosity properties of different narrow-fraction base oils after cutting through wide-fraction base oils, resulting in long evaluation cycles and unenvironmental protection in the lubricant production process, and it is difficult to timely feedback the adjustment of process parameters.

Method used

By collecting base oil samples, measuring their hydrocarbon carbon number distribution data and viscosity properties, a viscosity property prediction model based on hydrocarbon carbon number distribution data was established, and the narrow fraction viscosity properties of wide-distillate base oil were predicted.

Benefits of technology

It realizes rapid prediction of the viscosity properties of narrow fractions through wide-distillate base oil, shortens the evaluation time, improves the accuracy and detail of prediction, and supports efficient research and development and production of lubricating oil base oil.

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Abstract

The invention discloses a method for predicting the viscosity property of a narrow fraction based on the wide fraction composition of lubricant base oil, which comprises the following steps: collecting a base oil sample set, measuring hydrocarbon carbon number distribution data of samples in the sample set, and measuring the viscosity property of the samples in the sample set; establishing a viscosity property prediction model based on the hydrocarbon carbon number distribution data of the base oil; measuring hydrocarbon carbon number distribution data of a wide-fraction base oil sample to be measured, drawing carbon number distribution curves of different hydrocarbon wide fractions, and fitting a hydrocarbon carbon number distribution curve corresponding to the narrow-fraction base oil according to the hydrocarbon carbon number distribution curve of the wide-fraction base oil to obtain fitted hydrocarbon carbon number distribution data of the narrow-fraction base oil; and substituting the fitting hydrocarbon carbon number distribution data of the narrow fraction base oil into the viscosity property prediction model to obtain a narrow fraction viscosity property prediction value. The method provided by the invention realizes rapid determination of the properties of the lubricant base oil, and solves the problem of research and development period lag caused by sample accumulation, cutting and property determination.
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