2 results about "Biofuel feedstock" patented technology

This invention discloses a process for extracting oils from furfural wastewater to prepare bio-aviation fuel feedstock, applicable to the high-value recovery of trace oils from the primary distillation column wastewater during furfural production. The process includes steps such as feedstock hydrolysis, gas condensation, cooling and stratification of the wastewater oils at the bottom of the column, secondary air flotation oil extraction, isothermal thermal devolvation for impurity removal, microfiltration, saponification reaction, alcohol extraction, and vacuum distillation. By constructing a four-stage synergistic removal mechanism of thermal devolvation + saponification phase separation + alcohol extraction + vacuum distillation, unsaponifiable matter, insoluble substances, and water in the oils are effectively separated to obtain high-purity fatty acid methyl ester products, which can be directly used as bio-aviation fuel feedstock. This method is mild, energy-efficient, non-toxic, and environmentally friendly, avoiding secondary pollution caused by traditional extraction processes. It is both economical and practical, effectively extending the operating cycle of the wastewater evaporator, improving system stability and economic value, and providing a new path for the resource utilization of furfural wastewater.

In an aspect, a method is disclosed that includes contacting a composition with an aqueous solution to yield a mixture, where the composition includes one or more of animal fats, animal oils, plant fats, plant oils, vegetable fats, vegetable oils, greases, and used cooking oil, about 5 wt.% or more of free fatty acids, about 10 wppm or more of total metals, about 8 wppm or more phosphorus, about 20 wppm or more of nitrogen, and the aqueous solution includes ((NH4)2H2EDTA, (NH4)4EDTA, a monoammonium salt of diethylenetriaminepentaacetic acid, a diammonium salt of diethylenetriaminepentaacetic acid, a triammonium salt of diethylenetriaminepentaacetic acid, a tetraammonium salt of diethylenetriaminepentaacetic acid, (NH4)5DTPA, a combination of citric acid and Na4EDTA, a combination of citric acid and Na2H2EDTA, a combination of citric acid and a monosodium salt of diethylenetriaminepentaacetic acid, a combination of citric acid and a disodium salt of diethylenetriaminepentaacetic acid, a combination of citric acid and a trisodium salt of diethylenetriaminepentaacetic acid, a combination of citric acid and a tetrasodium salt of diethylenetriaminepentaacetic acid, a combination of citric acid and NasDTPA, or a combination of any two or more thereof, where the method further includes centrifuging the mixture to yield a first treated composition, wherein the first treated composition has less total metals and less phosphorus than the composition.