coking still

coking still

[′kok·iŋ ‚stil]
(chemical engineering)
A still in which coking is done; usually, it is a batch still.
References in periodicals archive ?
Paraffin wax was produced during distillation along with various grades of fuel: naphtha (or petroleum spirit) 6%, burning oil (kerosene) 23%, wax and lubricating oil 56%, the remaining heavy residue, sent to the coking stills, 15%.