MolaKule
Staff member
Synthesis (the chemical recipe for making this synthetic substance) of zinc dialkyldithiophosphate (ZDDP) consists of two stages.
1) phosphorus pentasulfide (P2S5) is reacted with an alcohol (usually isooctyl and or isopropyl)) to give dialkyldithiophosphoric acid, or DDP acid.
2) the acid is then neutralized by zinc oxide. Hence, ZDDP.
The resulting product is then heated to drive off any H2O and is filtered.
By changing reaction conditions such as rate of stirring, reaction pressure, neutralizing process, the order of addition of starting materials, and the types and amounts of alcohol, P2S5 and ZnO, various flavors of ZDDP can be produced.
1) phosphorus pentasulfide (P2S5) is reacted with an alcohol (usually isooctyl and or isopropyl)) to give dialkyldithiophosphoric acid, or DDP acid.
2) the acid is then neutralized by zinc oxide. Hence, ZDDP.
The resulting product is then heated to drive off any H2O and is filtered.
By changing reaction conditions such as rate of stirring, reaction pressure, neutralizing process, the order of addition of starting materials, and the types and amounts of alcohol, P2S5 and ZnO, various flavors of ZDDP can be produced.