Refiner (noun)

1. A person or organization that refines raw materials or substances.
2. A machine or device used for refining raw materials or substances.

Origin:

From the latin word "refinare" meaning "to make pure or refine".

Examples:

1. The refiner purifies the crude oil to produce gasoline and other products.
2. The gold refiner separates the impurities from the gold.
3. The silver refiner increases the purity of silver through a process called "silver electrolysis".
4. The sugar refiner removes impurities from raw sugar to produce refined sugar.
5. The refiner processes the raw materials to make them suitable for the final product.