Process for dehydration of normal paraffins to olefins

A method for dehydrogenation of normal paraffins to olefins comprising:

• deoxygenating a natural oil to form a feed stream comprising C9 to C28 paraffins,
• linear selective cracking the feed stream in a linear selective cracking unit under linear selective cracking conditions in the presence of a linear selective cracking catalyst to form a first stream comprising normal or lightly branched C9 to C14 paraffins and a second stream comprising isoparaffins;
• passing said first stream through an adsorbent bed containing an adsorbent comprising alkaline or alkaline earth cation exchange X-Zeolite wherein the adsorbent removes at least a portion of the oxygenates and the aromatics from the first stream by adsorption to form a treated stream;
• removing contaminants from the treated stream in a third adsorbent bed comprising a third adsorbent to form a decontaminated stream wherein the contaminates comprise sulfur compounds, or nitrogen compounds, or phosphorous compounds, or combinations thereof, wherein the adsorbent comprises 13X zeolite, 5A zeolite, an alumina-zeolite, or combinations thereof;
• and
• dehydrogenating the decontaminated stream to convert at least a portion of the decontaminated stream to olefins and provide a dehydrogenated stream comprising mono-olefins, di-olefins, and aromatics;
• and
• regenerating the adsorbent bed at a predetermined time to remove at least a portion of the oxygenates, or aromatics, or both adsorbed onto the adsorbent.

A method for dehydrogenation of normal paraffins to olefins comprising:

• deoxygenating a natural oil to form a first stream comprising C9 to C28 paraffins;
• linear selective cracking the first stream in a linear selective cracking unit under linear selective cracking conditions in the presence of a linear selective cracking catalyst to form a first stream comprising normal or lightly branched C9 to C14 paraffins and a second stream comprising isoparaffins;
• passing the first stream comprising normal paraffins, iso paraffins, olefins, oxygenates, and up to 10 wt. % aromatics, through a first adsorbent bed containing a first adsorbent comprising alkaline or alkaline earth cation exchange X-Zeolite wherein the adsorbent removes at least a portion of the oxygenates and the aromatics from the first stream by adsorption to form a treated stream;
• removing contaminants from the treated stream in a third adsorbent bed before dehydrogenating the treated stream, the third adsorbent bed comprising a third adsorbent to form a decontaminated stream wherein the contaminants comprise sulfur compounds, or nitrogen compounds, or phosphorous compounds, or combinations thereof, wherein the third adsorbent comprises 13X zeolite, 5A zeolite, an alumina-zeolite, or combinations thereof;
• dehydrogenating the decontaminated stream to convert at least a portion of the decontaminated stream to olefins and provide a dehydrogenated stream comprising mono-olefins, di-olefins, and aromatics;
• selectively hydrogenating the di-olefins in the dehydrogenated stream to form additional mono-olefins, and separating and removing the aromatics from the mono-olefins to form an aromatics stream comprising the aromatics and a mono-olefins stream comprising the mono-olefins;
• alkylating benzene with the mono-olefins under alkylation conditions to provide an alkylation effluent comprising alkylbenzenes and benzene;
• and
• isolating the alkylbenzenes to provide the alkylbenzene product derived from the natural oil.