Control of Foaming by Adding Known Mixtures of Pure Chemicals

Résumé du livre

The method of testing foam volume at room temperature, the bubbling method at high temperatures (100 degrees and 140 degrees C), and the beating and evacuation method were used to test 13 substitutes for glycerol and 27 substitutes for Aerosol OT for defoaming ability at 140 degrees C on Aeroshell 120 oil. In a ratio of 4 parts glycerol (or substitute) to 1 part Aerosol OT (or substitute) at concentrations of 1000 to 1500 parts per million, the best of these emulsions completely inhibited foaming. The best concentration was sorbitol and Aerosol OT, 800 and 200 parts per million, respectively. This concentration was an excellent defoamer for 4 hours but left a sticky residue.