Lubricity additives and methods of producing lubricity additives

摘要

Methods of producing lubricity additives and lubricity additives are disclosed. The methods of producing lubricity additives include removing sulfur from a tall oil fatty acid to a level of about 25 ppm or less and fractionally crystallizing the tall oil fatty acid to produce a lubricity additive which does not form crystals at temperatures as low as about -28.9 °C (-20 °F). The sulfur may be removed prior to or after fractionally crystallizing the tall oil fatty acid. Methods of improving the lubricity of a fuel are also disclosed.