Industrial plant that processes raw materials into refined products.

Facility for purifying and extracting desirable components from substances.

Complex used to convert crude oil into usable petroleum products.

Plant where impurities are removed or reduced in material processing.

Establishment specializing in improving quality of various resources/products.

Improving or perfecting a process, method, or skill.

Purifying substances through distillation or other processes.

Enhancing the quality of something by making subtle changes.

Processing raw materials to produce finished products.