Patent ID: 8652321
Filing Date: 2014-02-18
Classification: C10G

Abstract:
1. A process for the production of gasoline with a low sulfur content from a starting gasoline that contains at least 150 ppm by weight of sulfur-containing compounds comprising: a) selectively hydrogenating non-aromatic, polyunsaturated compounds that are present in the starting gasoline, thus reducing diolefins to mono-olefins b) increasing the molecular weight of light sulfur-containing products that are initially present in the gasoline that is introduced in a) and/or those that are contained in the product that originates from a), by reacting mercaptans with said mono-olefins from a) in the presence of a sulfided, nickel-based catalyst, c) alkylating of at least a portion of sulfur-containing compounds, that are present in the product that originates from b), thereby obtaining sulfur-containing compounds with a higher molecular weight, d) fractionating gasoline that originates from c) into at least two fractions, a first fraction that is virtually lacking in sulfur and that contains lightest olefins of unconverted starting gasoline in c), and at least one other fraction, heavier than said first fraction, enriched with sulfur-containing compounds, and e) treating at least one heavier fraction that originates from d) on a catalyst that makes it possible to decompose at least partially sulfur-containing compounds.