How aminic antioxidant lubricant additives work

[@khashayar_Hajiahmad]

Enjoyed it, finally found the time to look into it

[@drewdowling6704]

I did a lot of looking around and I am pretty sure that “STABIL” is a bulk chemical from Innospec called AO-22. It’s single ingredient is N,N’-di-sec-butyl-p-phenylenediamine. Even per wikipedia is it a “red liquid”. The other alkylated phenols they produce are “straw or amber colored” so unless dyed by the dyes they do produce, I am pretty sure this is correct. Also their website even says that phenylene diamine antioxidants are best for olefin content over 10% and I believe out gasoline is around 18%. I could be completely wrong.

[@LubricationExplained]

Not super familiar with fuel stabilisers but it stands to reason that they operate in much the same way as the antioxidant packages in lubricants.

[@iskandar_b]

Hello. could you tell me why phenolic and amine additives are usually not added more than 3% to the base oil? Is there any research on this issue

[@zakirhaq8964]

I'm wondering what type of Antioxidant is being used for Turbo Compressor in fertilizer application. Because it seems standard Turbine Oil Antioxidants don't really work well with the presence of Ammonia.

[@LubricationExplained]

Great point! In compressor application the gas being compressed often interacts with the oil. With Ammonia being a relatively polar molecule, most of the oils recommended for Ammonia compression are PAO synthetics. However - they're generally not designed specifically for ammonia compression, so the antioxidants are likely to be the same as in most other oils.

[@sajasmm]

ZDDP is an antioxidant ?

[@LubricationExplained]

Yes! Although it works a different way - it's a peroxide decomposer instead of radical scavenger.

[@sajasmm]

@@LubricationExplained thanks for the reply 🙏

[@drnavinkiranmurty8458]

Nice video

[@LubricationExplained]

Thanks! Hope you found it useful.