What microcontroller(8051 family) based projects can be done for a chemical plant which manufactures UREA?
The 8051 lends itself to simple real-time data acquisition or control tasks. I assume this is a one-man project, so you won’t be taking over the task of automating the entire process. I would suggest to work with the Quality department of the plant. Quality engineers are always interested in capturing data that is not currently available. So you could make a system that automatically takes measurements at one point of the chemical process and sheds some light on what can be improved in the process.