Verfahren zum Aufarbeiten der bei der Destillation von vinylaromatischen Verbindungen und bei der Alkylierung von aromatischen Verbindungen anfallenden,gegebenenfalls schwefelhaltigen Rueckstaende

摘要

1,205,353. Hydrocracking; purifying oils. FOSTER GRANT CO. Inc. 18 Feb., 1969 [20 Feb., 1968], No. 8834/69. Heading C5E. A process for the hydrocracking and hydro. desulfurization of a feed stock of vinyl aromatic distillation residue and aromatic alkylation residue comprises the steps of passing a mixture of the feed stock and hydrogen through a bed of hydrocracking and hydrodesulfurization catalyst: (a) the amount of hydrogen being sufficient to convert the free and chemically combined sulfur to hydrogen sulfide and to saturate the hydrocarbon components; (b) passing the feed stock through the catalyst bed at a rate of from 0.2 to 3.0 pounds per pound of catalyst per hour; (c) maintaining the temperature of the catalyst bed within the range of from 600‹ F. to 1100‹ F.; and (d) maintaining-the pressure of the feed stock and hydrogen within the range of from 100 to 500 P.S.I.G. The catalyst may be a combination of cobalt, nickel and molybdenum oxides on alumina. The feedstock may comprise the distillation residue from the production of styrene, divinylbenzene or vinyl toluene.