1. Ashless anti-wear hydraulic oils were developed with the additives produced by Yiping .

2. The article introduces the above ashless dispersants and their main producers at home and abroad.

3. And the performances of new type ashless dispersant in gasoline engine oil and diesel engine oil were also presented.

4. A new type of ashless anti-rust agent PN-1 is synthesized.

5. They have good compatility with succinimide ashless dispersant and ZDDP type oxidation and corrosion inhibitor, also, without sediment after mixing.

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6. Mobil Pegasus 801 Series are premium quality ashless gas engine oils intended for the lubrication of all classes of gas engines operating at low, medium and high speeds.

7. The synthetic technique of new type high molecular ashless dispersant of polybutene (PBP) and dimaleic anhydride was described.

8. Because the ashless additives had not second pollution, they became the development trend of soot suppressants and combustion aids.

9. Metallic detergent and ashless dispersant additive system provides superior control of ring belt and piston skirt deposits, even under the most severe operating conditions.

10. The development and application of ashless antiwear hydraulic fluid with high pressure are described.

11. Two kinds of ashless and phosphorous-free environmental friendly compounds, 2-mercaptobenzothiazole derivatives MBTA and MBTT were synthesized, which were characterized by FT-IR and element analysis.

12. Development on formulation of ashless anti-wear hydraulic oil was presented.

13. An ashless(), alcohol-free additive that improves cetane up to seven points for increased power and performance in all diesel engines.

14. Polyisobutenyl succinic anhydride is an important intermediate for production of ashless deter- gent dispersants such as succinimide, succinic ester and phenolic amine types.

15. The interaction mechanism of the effects of detergents and ashless dispersant on ZDDP have been studied with the circulating oxygen absorption oxidation test.

16. The invention provides a lubricating composition containing an oil of lubricating viscosity, an oil soluble molybdenum compound, and an ashless antiwear agent.

17. The invention also provides a method for manufacturing the ashless environment-friendly incense. The method has simple production technique.

18. In this paper, its history was introduced. The functional elements and their action mechanisms of ashy and ashless additives were analyzed.

19. The synthesis, evaluation on performance and application of a kind of borated PIB succinimide ashless dispersant were described.

20. The application of high activity polyisobutylene in fields of polyisobutylene succinic anhydride, polyisobutylene ashless dispersant and polyisobutyleneamine were summarized.