Universities abroad will usually hold summer schools. There is a fee, but perhaps one can find a sponsor.
Here are some examples for Germany, which by the way is the home country of BASF, the largest chemical producer before DuPont.
https://www.daad.de/deutschland/studienangebote/international-programmes/en/detail/5050/
https://www.daad.de/deutschland/studienangebote/international-programmes/en/detail/5001/
https://www.daad.de/deutschland/studienangebote/international-programmes/en/detail/5256/
https://www.daad.de/deutschland/studienangebote/international-programmes/en/detail/5536/