Cellulose derivatives comprising a hydroxyethyl group, such as hydroxyethyl methyl cellulose, are used as foam control agents in foodstuff processing. The cellulose derivatives are biodegradable while still providing excellent foam control capacity. In addition, cellulose derivatives foam control agents of the disclosure can be used with various apparatus while avoiding forming films that otherwise affect apparatus function. The cellulose derivatives can be used at various stages during industrial processing of vegetables (e.g., potatoes and beets) and fruits.

This invention relates to an composition, comprising A) at least one quaternary ammonium compound which is a collector for the reverse flotation of magnesium minerals from calcium carbonate B) at least one antifoam agent C) a solvent
and its use in the reverse flotation of calcium carbonate.