GB413719A - Improved process of refining hydrocarbons - Google Patents

Abstract

Liquid hydrocarbons are purified to obtain motor fuels by treating the liquid or vapour with ozonized air in presence of a catalyst specified below, and then with diluted or concentrated sulphuric acid to which ferric chloride or sulphate is added before or during treatment. Washing with soda lye and with water, and distillation may follow, and washing with soda lye may precede, the treatment with acid. Catalysts used are salts of iron, manganese, or vanadium, e.g. iron stearate manganese oleate, and resinate of vanadium; and aldehydes and ketones forming unstable peroxides with ozonized air, e.g. acrolein, citral, phorone, pinacoline, and benzaldehyde. In examples: (1) 10 c. meters of ozonized air are bubbled during \ba1/2\be hour and at 60 DEG C. through 1000 litres of crude cracked spirit topped to 70 DEG C.; the product is agitated with 5 per cent by weight of 70 per cent sulphuric acid containing 5 per cent of its weight of ferric chloride, freed from acid and tar, washed with soda lye, and rectified up to 180 DEG C.; (2) 15,000 litres of ozonized air containing 100 gm. of ozone per litre are bubbled through 1000 litres of crude benzol mixed with 0,125 litre of acrolein; the liquid is then treated with 5 per cent of 70 per cent sulphuric acid containing 20 per cent of its weight of ferric chloride, and after separating the tar is washed with soda and rectified up to 150 DEG C.