Preparing fatty acid alkyl ester from feed stock containing e.g. free fatty acids and fatty acid triglycerides, comprises esterifying feedstock with alkyl alcohol in presence of catalyst and transesterifying the free fatty acid feedstock

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This invention describes a process for making fatty acid alkyl esters, such as biodiesel, from feedstocks that contain free fatty acids and glycerides. It involves first esterifying the free fatty acids in the feedstock using a short-chain alcohol and an acid catalyst, followed by a transesterification step to efficiently convert the remainder of the feedstock into alkyl esters.

Use CasesContent extracted from patent full text and abstract with AI.

• Manufacturing biodiesel from low-grade oils or waste fats
• Producing renewable fuels from animal fats or used cooking oils with high free fatty acid content
• Creating industrial or chemical feedstocks from mixed lipid raw materials

BenefitsContent extracted from patent full text and abstract with AI.

• Allows use of cheaper and lower quality feedstocks containing high free fatty acids
• Improves yield and efficiency in biodiesel production by reducing soap formation
• Enables sustainable fuel and chemical production from waste or non-food sources

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Patent Abstract

Preparation of fatty acid alkyl ester (I) from a feed stock containing free fatty acids, and fatty acid triglycerides, fatty acid diglycerides and/or fatty acid monoglycerides, comprises: (a) contacting feedstock with an alkyl alcohol (1-5C-alkyl alcohols), in the presence of one or more acidic catalysts, where the free fatty acid is esterified from the feedstock in order to obtain a reduced to free fatty acid feedstocks; and (b) transesterifying the reduced free fatty acid feedstock.