Abstract: A polymeric resin comprising guanidine groups having at least one C4-C22 tertiary alkyl substituent.

Abstract: A method for the selective esterification of free fatty acids, alone or in triglycerides, with C1-C8 aliphatic alcohols or diols. The method uses a selective heterogeneous esterification catalyst. The catalyst is contacted with a reaction mixture containing a triglyceride having at least 0.5% free fatty acids, or a reaction mixture containing only free fatty acids, and a C1-C8 aliphatic alcohol or diol under conditions suitable for esterification.

Abstract: A method for esterification of free fatty acids with methanol. The method has steps of: (a) contacting a heterogeneous esterification catalyst in a reactor with a reaction mixture containing: (i) methanol and (ii) a triglyceride mixture containing 70-99.8 wt % triglycerides and 0.2-30 wt % free fatty acids, under conditions suitable for esterification, to produce a product stream; (b) separating water and methanol from the product stream to produce a dried product stream; (c) contacting the dried product stream with methanol to produce a methanol-rich phase and a triglyceride-rich phase; and (d) separating the methanol-rich phase and recycling it to the reactor.

Abstract: New polymeric additive including one or more ethylenically unsaturated surfactant monomers are described having a number average molecular weight less than 40,000 and having an improved balance of tack, adhesion, plasticity and peel strength and water whitening resistance as compared to other polymer additives.

Abstract: A continuous process for esterification of fatty acids in glyceryl esters with C1-C8 aliphatic alcohols in a tubular reactor. The method uses an expanded resin catalyst bed in the tubular reactor.

Abstract: A polymeric resin comprising guanidine groups having at least one C4-C22 tertiary alkyl substituent.

Abstract: A method for purification of crude triglycerides to be used as a raw material for production of biodiesel fuel. Crude triglycerides are contacted with a variety of adsorbents and ion exchange resins to reduce the levels of impurities.

Abstract: A method for production of stabilized fatty acid methyl esters. The method removes unsaturation present in fatty acid methyl esters, or removes unsaturation in triglycerides, which are then transesterified to fatty acid methyl esters.

Abstract: A method for purification of crude glycerol, especially crude glycerol derived from biodiesel production using alkaline catalysts. The method comprises combining the crude glycerol with acid, separating a glycerol layer, and treating the glycerol layer to decolorize it.

Abstract: A method for purification of crude glycerol, especially crude glycerol derived from biodiesel production using alkaline catalysts. The method comprises combining the crude glycerol with acid, separating a glycerol layer, and treating the glycerol layer to decolorize it.