Patent ID: 8845884
Filing Date: 2014-09-30
Classification: C10G

Abstract:
1. A process for producing aromatics from a naphtha feedstream comprising: passing the feedstream to a fractionation unit, thereby generating a first stream comprising light hydrocarbons, and a second stream comprising heavy hydrocarbons; passing the first stream to a first reformer, operated at a first set of reaction conditions, thereby generating a first product stream, wherein the first reformer has a catalyst inlet and a catalyst outlet; separating the second stream into an intermediate stream comprising C passing the heavy stream to a second reformer, operated at a second set of reaction conditions, thereby generating a second product stream, wherein the second reformer has a catalyst inlet and a catalyst outlet, wherein the first set of reaction conditions include a first reaction temperature, and wherein the first operating temperature is greater than 540° C., and at a reaction pressure less than 580 kPa (absolute), and the second set of reaction conditions includes a second reaction temperature, and wherein the second operating temperature is less than 540° C., and wherein the first reaction temperature is greater than the second reaction temperature, and wherein the second reformer comprises a plurality of reactors and wherein the catalyst and heavy stream pass through the plurality of reactors sequentially, and further comprising passing the heavy stream through an inter-stage heater; passing the intermediate stream to the last of the plurality of reactors of the second reformer; passing the second product stream to the first reformer generating the first product stream; passing the catalyst from a regenerator to the second reformer; passing the catalyst from the second reformer to the first reformer; and passing the first product stream to an aromatics separation unit.