Pyrolysis oil are affected by temperature, reaction time, algae species, algae concentration, reaction atmosphere, and catalysts, in subcritical water reaction conditions. Bio-oil typically requires significant additional treatment to render it suitable as a refinery feedstock to replace crude oil derived from petroleum, coal-oil, or coal-tar. Tar is a black mixture of hydrocarbons and free carbon obtained from a wide variety of organic materials through destructive distillation. Tar can be produced from coal, wood, petroleum, or peat. Wood-tar creosote is a colourless to yellowish greasy liquid with a smoky odor, produces a sooty flame when burned, and has a burned taste. It is
Wright's Coal Tar Soap brand, Simple Health and Beauty Ltd based in Solihull in the UK and is called Wright's Traditional Soap. Simple Health and Beauty is part of the consumer goods company Unilever UK Ltd European Union directives on cosmetics have banned the use of coal tar in non-prescription products, resulting in the removal of coal tar derivatives from the formula and replacement with tea tree oil as the main anti-bacterial ingredient. To cloak this major variance from the original recipe, the new soap has been made to approximate the look and smell of the original product. Wright's Coal Tar Soap <br> Created