Patent ID: 8926828
Filing Date: 2015-01-06
Classification: C07C,C10G

Abstract:
1. A process for increasing aromatics production from a naphtha feedstream comprising: passing the naphtha feedstream comprising aromatics, olefins naphthenes and paraffins to a naphtha splitter, thereby creating a first overhead stream comprising C6 to C7 aromatics, and a first bottoms stream comprising heavier hydrocarbons compounds, including paraffins and naphthenes; passing the first overhead stream comprising C6 to C7 aromatics to a first reformer system containing a first reforming catalyst operated at a first set of reforming conditions, wherein the reforming conditions include a first temperature and thereby creating a first reformer effluent stream; passing the first bottoms stream comprising heavier hydrocarbon compounds to a second reformer system containing a second reforming catalyst operated at a second set of reforming conditions, wherein the reforming conditions include a second temperature, to convert paraffins and naphthenes to aromatics via dehydrogenation and cyclization, and thereby creating a second reformer effluent stream, wherein the second temperature is lower than the first temperature; passing the first reformer effluent stream and the second reformer effluent stream to a fractionators, thereby creating a light gas stream, and a fractionator bottoms stream comprising aromatics; passing the fractionator bottoms stream to a reformate splitter, thereby creating a second overhead stream comprising C6 to C7 aromatics, and a second bottoms stream comprising heavier hydrocarbons; passing the second overhead stream to an aromatics separation unit, thereby creating an aromatics product stream and a raffinate stream; and passing the raffinate stream to the first reformer.