Patent ID: 8926827
Filing Date: 2015-01-06
Classification: C07C,C10G

Abstract:
1. A process for increasing aromatics production from a naphtha feedstream comprising: passing the naphtha feed stream comprising aromatics, olefins, naphthenes and paraffins to a first fractionator thereby creating a first overhead stream comprising lighter hydrocarbons and a first bottom stream comprising heavier hydrocarbons, including paraffins and naphthenes; passing the first overhead stream to a first reformer containing a first reforming catalyst at a first temperature to convert the lighter hydrocarbons to a first reformer effluent; passing the first bottoms stream to a second reformer containing a second reforming catalyst at a second temperature to convert paraffins and naphthenes to aromatics via dehydrogenation and cyclization, thereby creating a second reformer effluent, wherein the second temperature is lower than the first temperature; passing the first reformer effluent and the second reformer effluent to a reformate splitter, thereby creating a reformate splitter overhead comprising C6 to C7 aromatics, and a reformate bottoms stream comprising heavier hydrocarbons; passing the reformate splitter overhead to an aromatics extraction unit, thereby creating a purified aromatics stream comprising C6 to C7 aromatics, and a raffinate stream; and passing the raffinate stream to the first reformer.