Reactions of coal with the chlorides of iron, chromium and copper

Abstract

Abstract The study of X-ray diffraction patterns indicates the possibility of the formation of intercalation compounds in several coals after reactions with FeCl 3 , FeCl 3 ·6H 2 O, CuCl 2 , CuCl 2 ·2H 2 O, and CrCl 2 · 6H 2 O. These reactions were carried out without solvent at temperatures ranging from 215 to 250 °C. X-ray evidence suggests that washing of the products, obtained from these reactions, with dilute acid returns the coal starting material substantially unchanged. X-ray and chemical evidence shows that reaction of FeCl 3 and FeCl 3 ·6H 2 O with coal results in the reduction of some Fe(III) to Fe(II).