Abstract: The invention is a corn product removal process that successfully extracts oil and zein from dry-milled corn. Oils and zein are extracted from corn using ethanol. Corn solids are separated from the ethanol, oil and zein mixture produced in the step of extracting. Thereafter, the ethanol, oil and zein mixture are membrane filtered to restrain zein from the mixture and pass an oil and ethanol mixture. At least one of zein or oil is then selected to be separated for an output corn product.

Abstract: The invention is a corn product removal process that successfully extracts oil and zein from dry-milled corn. Oils and zein are extracted from corn using ethanol. Corn solids are separated from the ethanol, oil and zein mixture produced in the step of extracting. Thereafter, the ethanol, oil and zein mixture are membrane filtered to restrain zein from the mixture and pass an oil and ethanol mixture. At least one of zein or oil is then selected to be separated for an output corn product.

Abstract: The method of the invention uses raw corn, or a corn by-product as a source. The source is mixed with an alcohol to produce an alcohol-corn slurry. Centrifugation or filtration produces a clear filtrate from the alcohol-corn slurry. A membrane filtration step is then used to separate purified xanthophylls. Other steps may be combined with the basic process to produce additional corn products, such as oil and zein.

Abstract: An improved corn wet milling process is disclosed. In a process in which corn kernels are steeped in an aqueous solution and are milled to facilitate the separation of the components thereof, in which starch from the corn is separated from gluten, and in which at least one aqueous gluten-containing stream is generated, the improvement comprises membrane filtration of an aqueous gluten-containing stream, producing a gluten-enriched retentate, and removing water from the gluten-enriched retentate, thereby producing a substantially dry gluten product. This improved process provides an economical means of recovering a higher percentage of the available protein for inclusion in high value products.

Abstract: An improved corn wet milling process is disclosed, in which gluten is recovered from steepwater by membrane filtration and is incorporated in a corn gluten meal product. The process can include the steps of steeping corn kernels in an aqueous solution, thereby producing steep water which contains gluten protein; membrane filtration of the steep water, thereby producing a retentate which has a higher concentration of the gluten protein than the original steep water; reducing the water content of the retentate; and incorporating the remaining retentate into a corn gluten meal product.