error in Ea" it must be assumed that the source of the discrepancy lies in certain simplifying assumptions inherent in the B.E.T. calculations. The discrepancy may be due to the fact that in the theory Ea, is assumed to be equal to El, while the experimental results show that Ea, is actually about 25% higher than El. ACKNOWLEDGMENTAcknowledgment is made to Marjory Galvin for assistance with measurements and to T. M. Shaw and F. Stitt for helpful suggestions.

Study of the effect of heat on cottonseed oil miscella in a practical approach to the problem of objectionable color fixation during heating and solvent removal operations in the solvent extraction process. Heating of cottonseed oil miscellas at various temperatures and definite time periods under appropriate reduced pressures was carried out to determine the effect of heat on the resulting refined and bleached oils. Color fixation became objectionable between 150°and 180°F., and beyond 180°increased rapidly.Properly prepared solvent-extracted cottonseed oils from a MANY attempts have been made in the United States to apply the solvent extraction process to cottonseed. There is considerable activity in this field at present, but only a few publications have appeared (7, 8). The early commercial efforts (16, 18, 19) to produce an industrially useful oil from cottonseed by solvent extraction were abandoned largely because of the dark color of the resulting oil.Cottonseed pigments, such as gossypol and related substances, extracted with the oil from the cottonseed flakes or meal by organic solvents, impart to the miscella its characteristic color (1-5, 7, 9, 10). It is claimed that an aliphatic hydrocarbon such as hexane dissolves only a small portion of gossypol present in uncooked flakes or meal (4, 7, 9

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Disintegration of cottonseed meats is an important unit operation in the cottonseed fractionation process. The results of tests utilizing a high-speed, "dissolvertype" impeller for disintegration by liquid shear are presented including curves to show the effect of moisture, hulls, solvents, peripheral speed, etc.Over 90% of through-80-mesh material can be obtained. Moisture content over 5% appreciably reduced the efficiency and increased power consumption and the viscosity of the slurry. Whole flakes resulted in a finer end product than flakes pre-pulverized ill the dry state. It was found that tlie presence of hulls slightly increased disintegration, power consumption, and viscosity; that higher speeds (up to 6,000 FPM peripheral speed) were more efficient; and that the effect of solvents was small. (17) showed that propeller-type mixers were inefficient as disintegrators of cottonseed ill solvent slurries although suitable for 345 I 1945 SEED I PRIME LOT I L.~:,s i ! FL--'I 9 : t: '4_ ._Z'.__ FIo. 2. P r o c e s s i n g of c o t t o n s e e d flaked m e a t s p r i o r to d i s i n t e g r a t i o n . Pre-pilot plant investigations

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