Boil out - Idioms by The Free Dictionary
1. To use boiling water to clean or remove something from some material. A noun or pronoun can be used between "boil" and "out." A: "Do you think I'll be able to boil these grass stains out?" B: "Ooh. You might be better off just throwing those pants out, man."
2. To remove or separate something in a liquid by boiling. A noun or pronoun can be used between "boil" and "out." You'll want to boil out the impurities before the water is safe to drink.
References in periodicals archive
Tank boil outs
should be performed regularly, followed by a good visual inspection to determine boil out
This cost savings was coupled with an increase of time between wash ups and boil outs from 4 weeks to 5 weeks.
Machines run cleaner with fewer breaks and longer times between wash ups and boil outs. Lab screening to select the best option is straightforward and usually extrapolates directly to machine operation.