GB454389A - Improvements in the manufacture and production of non-knocking motor fuel by the catalytic reaction of carbon monoxide and hydrogen - Google Patents

Abstract

Non-knocking motor fuels are manufactured from the hydrocarbons formed by the catalytic conversion of carbon monoxide with hydrogen, by treating the low-boiling constituents thereof, or their fractions rich in olefines, preferably after separation of the higher boiling constituents, at an elevated temperature, e.g. 20--250 DEG C., with condensing agents under such conditions of time, temperature and activity of catalyst that hydrocarbons boiling higher, but not substantially above the end boiling point of benzine, are formed. The gases and vapours from the conversion of carbon monoxide and hydrogen may first be freed from constituents of high boiling point, particularly those of higher boiling point than benzine, by cooling, the products of low boiling point then being separated, e.g. by compression, which may be in three or more stages. Thus, the gases may be compressed at 3, 8, 24 and, if desired, 50 atmospheres, the first two fractions being directly employed, preferably in admixture with low boiling benzine fractions, and the later fractions being subjected to the polymerizing treatment. The polymerized product is advantageously mixed with the higher boiling fractions separated in the first stage of the compression. Alternatively, the condensing treatment may be applied to the whole of the benzine obtained by compression, or by absorption or washing instead of compression, whilst olefines from other sources may also be added during the condensation. Suitable condensing agents are halogen, sulphur, or halides such as boron fluoride, aluminium chloride, zinc chloride, titanium chloride or tin chloride, or bleaching earths impregnated with phosphoric acid or halides, or mixtures thereof. In an example, a mixture of carbon monoxide and hydrogen is led at 190 DEG C. over a catalyst consisting of cobalt, manganese and kieselguhr, the product is cooled to remove constituents boiling above 180 DEG C., the remaining gaseous mixture compressed at 3, 8 and 24 atmospheres, and the two latter fractions treated at 235 DEG C. with bleaching earth impregnated with phosphoric acid.ALSO:Non-knocking motor fuels are manufactured from the hydrocarbons formed by the catalytic conversion of carbon monoxide with hydrogen, by treating the low - boiling constituents thereof at an elevated temperature with condensing agents. The gases and vapours from the conversion of carbon monoxide and hydrogen may first be freed from high - boiling constituents by cooling, the products of low boiling point then being separated, e.g. by compression, which may be in three or more stages. Thus the gases may be compressed at 3, 8, 24 and, if desired, 50 atmospheres, the first two fractions being directly employed, preferably in admixture with low - boiling benzine fractions, and the later fractions being subjected to the polymerizing treatment. The polymerized product is advantageously mixed with the higher-boiling fractions separated in the first stage of the compression.