Patent ID: 6733660
Filing Date: 2004-05-11
Classification: C10G

Abstract:
A process for the production of products which are liquid at ambient conditions and contain organic sulfur compounds of higher molecular weight than corresponding sulfur-containing compounds in the feedstock, which process comprises:providing a feedstock comprising a mixture of hydrocarbons which includes olefins, and sulfur-containing organic compounds and nitrogen-containing organic compounds, the feedstock consisting essentially of material boiling between about 60Â° C. and about 345Â° C. and having a sulfur content up to about 4,000 or 5,000 parts per million and a nitrogen content up to about 2,000 parts per million; passing the feedstock through a bed of solid adsorbent, under conditions suitable for adsorption within the bed, to effect selective adsorption and/or complexing of at least a portion of the contained nitrogen-containing organic compounds with the adsorbent, and thereby obtain effluent from the bed which contains less nitrogen-containing organic compounds than the feedstock; in a first contacting stage at elevated temperatures, contacting the effluent with an acidic catalyst under conditions which are effective to convert a portion of the sulfur-containing organic compounds to a sulfur-containing material of higher molecular weight through alkylation by the olefins, thereby forming an initial product stream; and in a subsequent contacting stage and at temperatures at least 10 C lower than the average of the elevated temperatures in the first contacting stage, contacting at least a portion of the initial product stream with an acidic catalyst under conditions which are effective to convert a portion of the sulfur-containing organic compounds to a sulfur-containing material of higher molecular weight through alkylation by the olefins, thereby forming a subsequent product stream.