Soybean process

Soybeans. Vktuady ad soybeans processed in the United States are solvent-extracted with hexane to recover the od. This traditional process is outlined in Figure 4. Beans arriving at the plant are cleaned and dried, if necessary, before storage. When the beans move from storage to processing, they are cleaned further and may be dried and adowed to equdibrate at 10—11% moisture to facditate loosening of the seed coat or hud. They are then cracked. 

D. R. Erickson, ed.. Practical Handbook of Soybean Processing and Utilisation, American Oil Chemists Society Press, Champaign, lU. and United Soybean Board, St. Louis, Mo., 1995, 584 pp. 

SLAVIN J L, KARR s c, HUTCHINS A M and LAMPE J w (1998) Influence of soybean processing, habitual diet, and soy dose on urinary isoflavonoid excretion. Am J Clin Nutr 68, 1492S-5S. 

Wilson, S., Blaschek, K., and de Mejia, E.G. 2005. Allergenic proteins in soybean Processing and reduction of P34 allergenicity. NutrRev 63 47-58. 

Fig. 34.20. Solids-temperature curves for various types of shortenings. (From O Brien, R. D., "Shortenings," in Practical Handbook of Soybean Processing and Utilization, D. R. Erickson (Ed.), pp. 363-379, AOCS Press, Champaign, IL, 1995. With permission.)...

Wang FF.J. Murphy, P.A. 1996. Mass balance study of isoflavones during soybean processing. J. Agric. Food Chem. 44 2377-2383. 

Direct solvent extraction is the most widely used oil-recovery method for soybeans, but it also requires considerable capital and large scale to compete. In actual practice, solvent extraction is used to crush over 98% of the soybean processed in the United States. Process flow diagrams are shown in Figures 3 and 4. Most soybean solvent-extraction plants process more than 2,500 MT/day (Figure 5), and some are capable of processing as much as 5,000 MT/day (especially newly constructed plants in Brazil). Direct-solvent-extraction plants smaller than 1,000 MT/day have difficulty competing in the United States. At various times, soybeans have been extracted commercially with petroleum distillate fractions that resemble gasoline, acetone, carbon disulfide, ethanol, trichloroethylene, and even water. 

D. Erickson, ed., Handbook of Soybean Processing and Utilization, AOCS Press, Champaign, Illinois, 1995. 

Natural lecithin often has a brown color, although with advanced soybean processing technology, the color may approximate that of unbleached soybean oil (65). 

An excellent overview of the subject in general is ciated with Soybean Process Facilities (3). 

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