distillation of coal tar

The outgoing hot vapors from the main iron still preheat coal tar obtained from the destructive distillation of coal, in a pre-heater. In this process, coal tar loses most of the water it contains, along with some low boiling hydrocarbons..

Destructive Distillation of Coal - When coal is heated without air, it does not burn but produces many by-products. This process of heating coal in the absence of air is called destructive distillation of coal. The main by products are: co..

Destructive distillation of coal occurs when coal is heated in the absence of air, at high temperatures. To achieve this, coal is heated in the absence of air in iron retorts, wherein the volatile material evolved is collected as distillate/condens..

On destructive distillation, coal yields useful products like coal gas, coal tar, ammonia and coke. Generation of electricity Domestic fuel for cooking and heating Manufacture of synthetic petroleum and natural gas To heat water in ste..

The products of destructive distillation of coal are extensively used on an industrial scale for various purposes. Coke This is a black porous substance, which is left when coal undergoes destructive distillation. It is a very good fuel and when ignited it bu..

>o C, with the passage of millions of years of time. Most of the energy needs that started with the industrial revolution some 250 years ago, and which exponentially increased in the 20 th century have been met by the reserves of coal and petroleum. The use of coal and petroleum..

Coal is a complex mixture of hydrocarbons. It also contains some organic compounds containing nitrogen and sulphur in small amounts. It can be approximated to the formula (C 3 H 4 ) n . Coal is a hydrogen-deficient substance. It is assumed that the basic structure of coalh..

In the early nineteenth century, phenol was selected from coal tar by destructive distillation. Now phenol is commercially produced synthetically. The laboratory methods of preparation of phenols a..

In this process, coal is heated in the absence of air to about 1273 - 1473 K. The major products of high temperature pyrolysis are, Coal..