Process for separating normal paraffins from hydrocarbons...

Details Process for separating normal paraffins from hydrocarbons... Process for separating normal paraffins from hydrocarbons...

2005-03-22

2005-03-22

Griffin, Walter D. (Department: 1764)

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By contact with solid sorbent

C585S822000, C585S825000, C585S826000

Reexamination Certificate

active

06870073

ABSTRACT:
There is provided with a process for separating normal paraffins from hydrocarbons of C5-10using zeolite molecular sieve5A, which comprises the steps of (a) selective adsorption (b) cocurrent purge (c) countercurrent desorption. The present process employs butane for purge and desorption step to achieve excellent desorption efficiency and recycles butane in liquid phase to reduce the investment cost. The optimum operating conditions for feedstock change and adsorption capacity reduction are determined by NIR system for on-line monitoring and control. The separated normal paraffins can be efficiently applied to raw material for ethylene production and the separated non-normal paraffins can be efficiently applied to raw material for aromatic hydrocarbons production.

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