12/26/2023 0 Comments 380 mmhg to atm1 2 3 Stream Name Biodiesel Methanol Mix Methanol to Biodiesel Ratio = 50:1 Temp F. ![]() TABLE 1 ChemCad Simulation of various ratios of methanol to biodiesel/methyl oleate Stream No. 1, 2008), which are hereby incorporated by reference in their entirety. Methods of producing biodiesel by esterification or transesterification reactions are described in, for example, U.S. As used herein, “biodiesel” refers to a non-petroleum-based fuel that includes short chain alkyl (methyl or ethyl) esters that is made by transesterification of oils such as corn oil, soybean oil, canola oil, grape seed oil, palm oil, animal fats, or the like. In some embodiments, the mixture comprises biodiesel or a biodiesel starting material including, but not limited to corn oil, soybean oil, canola oil, grape seed oil, palm oil, algae oil, oil derived from bacteria, oil derived from cyanobacteria, oil derived from yeast, animal fats, used cooking oils, and the like. The mixture prior to separation can be a liquid mixture, a solid mixture or a mixture of both solids and liquids. Additionally, unlike chemical reactions in which a gaseous reactant is mixed with a secondary reagent carrier gas, no chemical reaction is taking place, and only distillation, or vapor stripping, occurs in the present invention. ![]() Moreover, the present method occurs at a lower temperature and shorter residence time compared to vacuum distillation resulting in less degradation of the solid, non-volatile materials. Unlike vacuum distillation in which a mixed feed stream is nearly 100% volatile, the mixture prior to separation of the present invention is typically comprised of about 25% volatile material, but may be considerably higher or lower. In the method, the volatile components are stripped from a substantial amount of non-volatile components such as amino acids, proteins, carbohydrates, and minerals. The invention is directed, in part, to a method for separating volatile components from non-volatile components in a mixture using a vaporized solvent to distill the volatile components from the non-volatile components. Preferably, the mixture is contacted with the distillation alcohol at about atmospheric pressure or under a moderate vacuum. The distillation alcohol imparts a partial vapor pressure on the volatile components. In some embodiments, the mixture is contacted with a distillation alcohol that is superheated. and 250° C., contacting the mixture with a distillation alcohol that is vaporized or in a gaseous phase and distilling at least a portion of the volatile components from the mixture. In one embodiment, the invention is directed to a method for separating volatile components such as alkyl esters, alcohols, hydroxymethylfuran, dimethylfuran, methyl tetrahydrofuran, polyhydric alcohols, and the reduction products of polyhydric alcohols from non-volatile components in a mixture comprising heating the mixture to between 150° C. The present invention relates to methods and apparatus for separating volatile components from non-volatile components in a mixture. The resulting alkyl esters are then sufficiently purified to be sold into transportation fuel markets. The resulting alkyl esters are typically purified by settling and subsequent acidulation and flocculation to remove the glycerin/catalyst bottoms, by treatment via water washing and drying sorbent treatment or ion exchange, by vacuum distillation to further purify the resulting alkyl ester from the non-volatile components, or by a combination of these procedures. ![]() When the reaction is completed the excess alcohol is removed from the reaction vessel by vacuum stripping or, alternatively, removed from a separate stripping vessel by vacuum stripping. In general, at least a 100% stoichiometric excess of alcohol is used to drive the trans-esterification reaction. Current reaction systems are typically batch or continuous systems. are typically reacted with an alcohol and a base catalyst to trans-esterify the triglyceride into alkyl esters and a glycerin/catalyst bottoms mixture. In biodiesel manufacturing, refined and extracted vegetable oils such as corn oil, soybean oil, canola oil, grape seed oil, and palm oil or animal fats, etc.
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