There are several antonyms for the word "immingle" that can describe different processes of mixtures. One of them is "separate," which refers to the act of removing elements from a mixture to segregate them. Another antonym is "differentiate," which highlights the process of distinguishing between various components in a mixture, usually by their characteristics or properties. On the other hand, "isolate" can also mean to separate or segregate, but with the intention of creating a more concentrated or pure substance. Finally, "purify" is another antonym of "immingle," referring to the process of removing impurities, contaminants, or unwanted elements from a mixture. Overall, these antonyms serve to enhance our understanding of the different processes involved in handling complex mixtures.