Patent ID: 7960601

Claim:
A process for producing a heavy paraffin product stream, comprising: passing a hydrocarbon feedstream comprising paraffins in the C15-C28 range to an adsorption separation unit, thereby creating an extract stream, comprising n-paraffins in the C15-C28 range and a desorbent and a raffinate stream, comprising non normal paraffins in the C15-C28 range and a desorbent; mixing the extract stream with a diluent, thereby creating an intermediate extract stream; mixing the raffinate stream with a diluent, thereby creating an intermediate raffinate stream; passing the intermediate extract stream to a first separation column operated at desorbent separation conditions, thereby creating first column overhead stream comprising the desorbent, and a first column bottoms stream comprising the n-paraffins in the C15-C28 range and the diluent; passing the intermediate raffinate stream to a second separation column operated at desorbent separation conditions, thereby creating a second column overhead stream comprising the desorbent, and a second column bottoms stream comprising non-normal paraffins and the diluent; passing the first column bottoms stream to a third separation column operated at diluent separation conditions, thereby creating a third column overhead stream comprising the diluent, and a third column bottoms stream comprising the n-paraffins in the C15-C28 range; and passing the second column bottoms stream to a fourth separation column operated at diluent separation conditions, thereby creating a fourth column overhead stream comprising diluent, and a fourth column bottoms stream comprising non-normal paraffins.