The comments made in this thread show the vast ignorance of feed and feed ingredient manufacturing.
There are two type of commercial soybean processing methods to produce soybean meal. The first and most prominent (greater than 95% of all SBM) is called Solvent Extracted Soybean Oil Meal. In this process the soybeans are ground, subjected to a solvent oil extraction typically with hexane, and heated to inactivate the naturally occuring trypsin inhibitor. The SBM generated from this are sold as either Hi Pro which is in the 47.5 to 49% protein range. The other is 44% SBM, this is the same as Hi Pro, except soy hulls are added back to the meal to generate a 44% protein product. In virtually all commercial monogastric diets Hi Pro SBM is used.
The other method for producing SBM is the extrusion and expelling process. In this method the soybeans are extruded the heat the soybean meal to inactivate the trypsin inhibitor. This produces a "full fat SBM" with an oil content of about 18% and protein in the high 30s. This SBM can be then expelled to squeeze out the oil which yields a SBM with about 7% oil and 44% protein.
Jim
There are two type of commercial soybean processing methods to produce soybean meal. The first and most prominent (greater than 95% of all SBM) is called Solvent Extracted Soybean Oil Meal. In this process the soybeans are ground, subjected to a solvent oil extraction typically with hexane, and heated to inactivate the naturally occuring trypsin inhibitor. The SBM generated from this are sold as either Hi Pro which is in the 47.5 to 49% protein range. The other is 44% SBM, this is the same as Hi Pro, except soy hulls are added back to the meal to generate a 44% protein product. In virtually all commercial monogastric diets Hi Pro SBM is used.
The other method for producing SBM is the extrusion and expelling process. In this method the soybeans are extruded the heat the soybean meal to inactivate the trypsin inhibitor. This produces a "full fat SBM" with an oil content of about 18% and protein in the high 30s. This SBM can be then expelled to squeeze out the oil which yields a SBM with about 7% oil and 44% protein.
Jim