A high-alkali low-ash methanol engine oil compound and methanol engine oil

By optimizing the composition of methanol engine oil additives, a high-alkalinity, low-ash composite agent was formed, which solved the problems of carbon deposits and acid corrosion in methanol engines, and improved the engine's cleanliness and antioxidant performance.

CN117660073BActive Publication Date: 2026-07-17PETROCHINA CO LTD
View PDF 1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
PETROCHINA CO LTD
Filing Date
2022-08-31
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

When using traditional methanol engine oil, excessive ash content in methanol engines leads to excessive carbon buildup in the combustion chamber. At the same time, the acidic substances formed after methanol oxidation require sufficient alkalinity to neutralize them and prevent corrosion of engine parts.

Method used

By optimizing the composition and proportion of additives in methanol engine oil, high-alkalinity synthetic calcium sulfonate, zinc sulfophosphoric acid salt, ashless dispersant and 2-pyridine dodecyl carboxylate ashless alkaline agent are added to form a high-alkalinity, low-ash methanol engine oil complex, which enhances acid neutralization capacity and antioxidant performance.

Benefits of technology

It achieves improved base number and base retention of methanol engine oil while ensuring low ash content, reducing engine carbon deposits, enhancing oxidation resistance and rust prevention, and extending engine life.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN117660073B_ABST
    Figure CN117660073B_ABST
Patent Text Reader

Abstract

The application provides a high-alkali-value and low-ash methanol engine oil compound and a methanol engine oil, and raw materials of the high-alkali-value and low-ash methanol engine oil compound include, in mass fraction, 15-25 parts of high-alkali-value synthetic calcium sulfonate, 6-11 parts of sulfur-phosphorus alkyl zinc salt, 55-67 parts of ashless dispersant, 3-8 parts of 2-pyridine dodecyl formate ashless alkaline agent and 4.5-6.5 parts of butyl octyl diphenylamine; wherein the high-alkali-value synthetic calcium sulfonate has an alkali value of greater than or equal to 150 mgKOH / g, and the 2-pyridine dodecyl formate ashless alkaline agent has an alkali value of greater than or equal to 150 mgKOH / g. The high-alkali-value and low-ash methanol engine oil compound makes the methanol engine oil have high alkali value and low ash content, and has good antioxidant property.
Need to check novelty before this filing date? Find Prior Art