Agricultural extraction products and processes
a technology of extraction products and processes, applied in the field of agricultural/biological (plant, animal, fish) oil refining, can solve the problems of spontaneous combustion, insufficient yeilds, and troublesome waste products, and achieve the effect of useful biocidal properties
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[0060]Various aspects of the invention are described in detail below.
Spent Bleaching Earth Use
[0061]Bleaching earths are used after crude oils are refined with alkali and washed with water. They are used to absorb trace quantities of undesirable constituents from refined oils. Bleaching earths (clays) can be natural earths (Diatomaceous Earths) and can contain silica / silicates, or even carbon or activated carbon. They are used in approximately 1% concentrations to the crude, once-refined oil to improve refining and water washing. Attempts have been made to recover some oil. See Orth, Jr., U.S. Pat. No. 4,285,832, issued 25 Aug. 1981 which is hereby incorporated by reference.
[0062]Spent bleaching earth is a disposal problem in that it is saturated with oil and spontaneously combusts. Waste treatment amounts to paying a disposal company to take it away.
[0063]In this invention, the spent bleaching clay, which is saturated with vegetable oil, is treated with alkali to saponify the oil a...
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