Coal tar is a brown or black liquid of extremely high viscosity. Coal tar is among the by-products when coal is carbonized to make coke or gasified to make coal gas. Coal tars are complex and variable mixtures of phenols, polycyclic aromatic hydrocarbons (PAHs), and heterocyclic compounds, about 200 substances in all.
... distillation, and it produces condensable coal tar, oil and water vapor, non-condensable synthetic gas, and a solid residue-char ... The coal tar and oil are then further processed by hydrotreating to remove sulfur and nitrogen species, after which they are processed into fuels ... In this low-temperature carbonization process, coal is heated at 680 °F (360 °C) to 1,380 °F (750 °C) in the absence of air ...
... In the coal gas era, there were many companies in Britain whose business was to distill coal tar to separate the higher-value fractions, such as naphtha, creosote and pitch ... These companies included British Tar Products Lancashire Tar Distillers Midland Tar Distillers Newton, Chambers Company (owners of Izal brand disinfectant) ...
... distillation, and it produces condensable coal tar, oil and water vapor, non-condensable synthetic gas, and a solid residue-char ... The condensed coal tar and oil are then further processed by hydrogenation to remove sulfur and nitrogen species, after which they are processed into fuels ... process is a low-temperature carbonization process, where coal is heated at 680 °F (360 °C) to 1,380 °F (750 °C) in the absence of air ...
... aniline, which in turn could be easily obtained from coal tar over the next ten years Perkin set up the first industrial model of molecules obtained through synthesis from coal tar and his success had prompted ...
... The company used substances, such as creosote derived from coal tar, to prolong lumber's useful life, supplying railway ties and pilings for wharves and foundations throughout Europe and ... In the coal-intensive environment of the nineteenth and early twentieth centuries, there was an ever-increasing source of coal tar, and a demand for treated wood ... It was called the Dominion Tar and Chemical Company, Limited ...
Famous quotes containing the words tar and/or coal:
“The master, the swabber, the boatswain and I,
The gunner and his mate,
Loved Mall, Meg, and Marian and Margery,
But none of us cared for Kate;
For she had a tongue with a tang,
Would cry to a sailor, Go hang!
She loved not the savour of tar nor of pitch,
Yet a tailor might scratch her whereer she did itch:
Then to sea, boys, and let her go hang.”
—William Shakespeare (15641616)
“The rooms very hot, with all this crowd, the Professor said to Sylvie. I wonder why they dont put some lumps of ice in the grate? You fill it with lumps of coal in the winter, you know, and you sit round it and enjoy the warmth. How jolly it would be to fill it now with lumps of ice, and sit round it and enjoy the coolth!”
—Lewis Carroll [Charles Lutwidge Dodgson] (18321898)