NOVELTY - Line comprises: assembly for removing the free fatty acids from unrefined oil; membrane extractor consisting of cylindrical case, fixed in the tubular grids; cylindrical case having branch pipes; evaporation apparatus for removing carbon dioxide from refined oil; condenser for capture of vapors of carbon dioxide unit of removal phospholipids from the refined oil; rotary tape apparatus for drying phospholipid emulsion; unit of extraction by acetone of neutrals from the phospholipid concentrate; and evaporation apparatus for removing acetone.    USE - The line is useful for producing biofuel of vegetable oil (claimed).    DETAILED DESCRIPTION - Line comprises: assembly for removing the free fatty acids from unrefined oil for obtaining refined vegetable oil and free fatty acids; membrane extractor consisting of cylindrical case, inside which is placed beam of the tubular membranes, fixed in the tubular grids; receiving chamber with branch pipe for the supply of unrefined vegetable oil inward tubular membranes and exhaust chamber with branch pipe for the outlet of the refined oil and carbon dioxide; cylindrical case having branch pipe for the input of carbon dioxide into space between the tubular membranes and with branch pipe for the outlet of the fatty acids and carbon dioxide; evaporation apparatus for removing carbon dioxide from refined oil; condenser for capture of vapors of carbon dioxide unit of removal phospholipids from the refined oil for obtaining phospholipid emulsion; rotary tape apparatus for drying phospholipid emulsion for obtaining phospholipid concentrate; unit of extraction by acetone of neutrals from the phospholipid concentrate for obtaining miscella of neutrals in acetone; evaporation apparatus for removing acetone from the miscella to obtain neutrals and unit for obtaining biofuel from the neutrals, which includes membrane reactor consisting of cylindrical case, inside which is placed beam of the tubular membranes, fixed in the tubular grids, where the cylindrical barrel has branch pipe for the input of reagents, branch pipe for the outlet of unreacted reagents, and branch pipe for the outlet of reaction products comprising biofuel, the diaphragm reactor are housed in circulating circuit with sensor level, and the circulating pump and heat exchanger are arranged to the section of reaction products of the biofuel and methanol; and evaporation apparatus for removing methanol from biofuel.