19-07-1917 дата публикации
Номер: GB191517822A
17,822. Dehn, F. B., [Synthetic Hydrocarbon Co.]. Dec. 20. Cracking hydrocarbons. - Relates to transforming heavy hydrocarbons into lighter liquid or gaseous hydrocarbons by continuously and completely flashing them into vapour, subjecting the vapour to a cracking temperature while flowing downwardly through a column such as to permit of free subsidence of the heavier particles, and withdrawing the vapour at the base of the column. The invention consists in the employment of means for varying the pressure maintained during the operation and thus enabling the nature of the products obtained to be varied. A suitable raw material is kerosene of 81 sp. gr. By the use of pressures below 10 lbs., per sq. in. absolute, gaseous hydrocarbons of an unsaturated character are obtained; below 4 lbs. absolute, gaseous hydrocarbons of the ethylene series are obtained. Hydrogen, methane or other gaseous hydrocarbons, carbon monoxide (as water-gas) may be admitted to the cracking chamber. At pressures above atmospheric, say about 5 atmospheres, aromatic hydrocarbons are produced; at pressures above 6 atmospheres, xylene and toluene are obtained; at pressures of about 10 atmospheres, benzene is obtained. At high pressures, gasoline is obtained. The temperatures employed are 750-900‹ C. for the production of gases, 600-650‹ C. for xylene and toluene, 650-800‹ C. for benzene, and 450-500‹ C. for gasoline. Apparatus employed more particularly for generating gas comprises a cracking- chamber a heated electrically or otherwise and provided at the top with a packing g on which the heavy hydrocarbon coming from the tank C is vaporized. The products flow through acondenser D to a receiver E, whence the gases are withdrawn by a vacuum pump G. Reference has been directed by the Comptroller to Specifications Nos. 9162/15, 9163/15, and 13,100/15.
Подробнее