A method comprising a series of selective extraction techniques for the parallel production of biodiesel and isolation of several valuable co-products including an alkenone hydrocarbon mixture of the kerosene/jet fuel range (primarily C10-, C12-, and C17-hydrocarbons) and fucoxanthin, a high-valued carotenoid, from the marine alkenone-producing microalgae Isochrysis.

The present invention provides a method for reducing the level of free fatty acids in biodiesel/fatty acid alkyl esters. The method comprises providing a composition comprising fatty acid alkyl esters, free fatty acids and/or a fatty acid feedstock, reacting said free fatty acids and/or said fatty acid feedstock with alcohol in the presence of one or more liquid lipolytic enzymes to produce fatty acid alkyl esters; and/or reacting the free fatty acids and/or said fatty acid feedstock with alcohol in the presence of one or more non-enzymatic catalysts to produce fatty acid alkyl esters.

The present application generally relates to the introduction of a renewable fuel oil as a feedstock into refinery systems or field upgrading equipment. For example, the present application is directed to methods of introducing a liquid thermally produced from biomass into a petroleum conversion unit; for example, a refinery fluid catalytic cracker (FCC), a coker, a field upgrader system, a hydrocracker, and/or hydrotreating unit; for co-processing with petroleum fractions, petroleum fraction reactants, and/or petroleum fraction feedstocks and the products, e.g., fuels, and uses and value of the products resulting therefrom.

A biodiesel composition comprising a stabilization agent is disclosed. The stabilization agent comprises depolymerized lignin having a weight average molecular weight of at least 360 g/mol and at most 5000 g/mol, and the TEAC value of the depolymerized lignin is at most 50% of the TEAC value of a corresponding lignin before having been depolymerized, and wherein the weight average molecular weight of the depolymerized lignin is at most 60% of the weight average molecular weight of the corresponding lignin.

The present invention describes a process for continuous fractionation of CTO (crude tall oil) to RTD (refined tall diesel), said process comprising:—when removing a stream of TOP (tall oil pitch) the CTO is fed through at least two evaporation zones arranged in series so that one stream of CTO is fed from a first evaporation zone to a second evaporation zone, wherein a TOP stream is produced and fed from the second evaporation zone, wherein a first vapor stream is produced within the first evaporation zone and a second vapor stream is produced within the second evaporation zone and wherein there is a temperature difference of at least 10° C. between the first vapor stream and the second vapor stream; and—feeding the first vapor stream and the second vapor stream into a subsequent fractionation column to produce a stream of RTD from the fractionation column, wherein the first vapor stream and the second vapor stream are being fed to different positions, relative to the column height, in the fractionation column, where different conditions are applied to ensure suitable fractionations of a more fatty acid rich material and a more rosin rich material, respectively, and which different positions in the fractionation column are separated by packing means.

The invention relates to oil-in-water (water continuous) emulsions that can be used as fuels, and which have high static and dynamic stability, to a process for their preparation, and to fuel compositions comprising such emulsions.

The present invention relates to fuel derived from renewable resources. More specifically, the present invention provides a composition which can be used as a fuel and a mixture which can be added to one or more C.sub.8-22 fatty acid triglycerides in order to provide a fuel. In particular, the present invention concerns the reduction of decomposition of such fuels due to bacterial growth and oxidation.

The present invention relates to separation of desired target products from biological, plant, and waste-type material, wherein the desired target products include renewable fuels such as ethanol, biobutanol, and biodiesel, wherein the separation is conducted with a cross-flow filtration system having the ability to separate desired products from both non-viscous and viscous medium.

A method comprising a series of selective extraction techniques for the parallel production of biodiesel and isolation of several valuable co-products including an alkenone hydrocarbon mixture of the kerosene/jet fuel range (primarily C10-, C12-, and C17-hydrocarbons) and fucoxanthin, a high-valued carotenoid, from the marine alkenone-producing microalgae Isochrysis.

The present invention relates to separation of desired target products from biological, plant, and waste-type material, wherein the desired target products include renewable fuels such as ethanol, biobutanol, and biodiesel, wherein the separation is conducted with a cross-flow filtration system having the ability to separate desired products from both non-viscous and viscous medium.