Hi,

Yes, you can.
After B. Sc chemistry, you have to do B.Tech in chemical engineering, but I will suggest you to opt for M.Sc chemistry and then going for M.Tech in chemical engineering because you can't go for M.Tech after a B.Sc degree.

After doing Bsc in chemistry it is best to to go for chemical engineering in b.tech. As chemical engineering branch is most similar to Bsc. Chemistry than that of other branches in engineering.

To know more about what to do after Bsc. Chemistry you can refer to the link below -

https://www.careers360.com/question-what-can-i-do-after-bsc-chemistry

Hope this helps.

Good luck.