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公开(公告)号：US20240216898A1
公开(公告)日：2024-07-04
申请号：US18393154
申请日：2023-12-21
Inventor： Megan E. Witzke , Randolph J. SMILEY , Chuansheng BAI , Scott J. WEIGEL , Xiaochun XU
CPC classification number: B01J29/7869 , B01J29/166 , B01J29/7861 , B01J29/7876 , B01J37/0203 , B01J37/0236 , B01J2229/20
Abstract: An isomerization catalyst is provided, along with corresponding systems and methods, which provides improved isomerization for bio-derived feeds in reaction environments where by-products from deoxygenation are present. The catalyst provides unexpectedly increased activity and/or selectivity in situations where, for example, a deoxygenation effluent is cascaded to the isomerization catalyst. Additionally, the isomerization catalyst can assist with reducing or minimizing hydrogen consumption during isomerization. The increased activity, stability, and/or reduced hydrogen consumption is achieved in part based on using a dispersion agent when adding base metals to the catalyst. In addition to the base metals, the catalyst includes a zeolitic framework structure suitable for isomerization.
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公开(公告)号：US11745168B2
公开(公告)日：2023-09-05
申请号：US17349986
申请日：2021-06-17
Inventor： Scott J. Weigel , Megan E. Witzke , Wesley Sattler , Brandon M. Carcuffe , Jihad M. Dakka , Ryan S. Dugan
IPC: B01J23/00 , B01J6/00 , B01J21/06 , B01J23/888 , B01J35/00 , B01J35/10 , B01J37/03 , C07C5/27 , B01J37/00
CPC classification number: B01J23/002 , B01J6/001 , B01J21/066 , B01J23/888 , B01J35/0026 , B01J35/1014 , B01J35/1019 , B01J37/03 , C07C5/2705 , B01J37/0009 , C07C2521/06 , C07C2523/888
Abstract: Tungstated zirconium catalysts for paraffin isomerization may comprise: a mixed metal oxide that is at least partially crystalline and comprises tungsten, zirconium, and a variable oxidation state metal selected from Fe, Mn, Co, Cu, Ce, Ni, and any combination thereof. The mixed metal oxide comprises about 5 wt. % to about 25 wt. % tungsten, about 40 wt. % to about 70 wt. % zirconium, and about 0.01 wt. % to about 5 wt. % variable oxidation state metal, each based on a total mass of the mixed metal oxide. The mixed metal oxide has a total surface area of about 50 m2/g or greater as measured according to ISO 9277, and at least one of the following: an ammonia uptake of about 0.05 to about 0.3 mmol/g as measured by temperature programmed adsorption/desorption, or a collidine uptake of about 100 μmol/g or greater as measured gravimetrically.
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公开(公告)号：US12030845B2
公开(公告)日：2024-07-09
申请号：US17807024
申请日：2022-06-15
Inventor： Wesley Sattler , Jihad M. Dakka , Guang Cao , Xinrui Yu , Brandon M. Carcuffe , Jason M. Golias , Scott J. Weigel , Carolyn M. Aimino , Megan E. Witzke
CPC classification number: C07C5/2705 , B01J21/066 , B01J23/002 , B01J23/30 , C07C2521/06 , C07C2523/30
Abstract: Isomerization of normal paraffins to form branched paraffins may be complicated by significant cracking of C7+ paraffins under isomerization reaction conditions. This issue may complicate upgrading of hydrocarbon feeds having significant quantities of heavier normal paraffins. Cracking selectivity may be decreased by combining one or more naphthenic compounds with a feed mixture comprising at least one C7+ normal paraffin and/or by utilizing tungstated zirconium catalysts having decreased tungsten loading. Further, C5 and C6 normal paraffins may undergo isomerization in the presence of C7+ normal paraffins. Methods for isomerizing normal paraffins may comprise: providing a feed mixture comprising at least C5-C7 normal paraffins and lacking normal paraffins larger than C8; and contacting the feed mixture with a bifunctional mixed metal oxide catalyst under isomerization reaction conditions effective to form a product mixture comprising one or more branched paraffins formed from each of the C5-C7 normal paraffins.
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公开(公告)号：US20220402838A1
公开(公告)日：2022-12-22
申请号：US17807024
申请日：2022-06-15
Inventor： Wesley Sattler , Jihad M. Dakka , Guang Cao , Xinrui Yu , Brandon M. Carcuffe , Jason M. Golias , Scott J. Weigel , Carolyn M. Aimino , Megan E. Witzke
Abstract: Isomerization of normal paraffins to form branched paraffins may be complicated by significant cracking of C7+ paraffins under isomerization reaction conditions. This issue may complicate upgrading of hydrocarbon feeds having significant quantities of heavier normal paraffins. Cracking selectivity may be decreased by combining one or more naphthenic compounds with a feed mixture comprising at least one C7+ normal paraffin and/or by utilizing tungstated zirconium catalysts having decreased tungsten loading. Further, C5 and C6 normal paraffins may undergo isomerization in the presence of C7+ normal paraffins. Methods for isomerizing normal paraffins may comprise: providing a feed mixture comprising at least C5-C7 normal paraffins and lacking normal paraffins larger than C8; and contacting the feed mixture with a bifunctional mixed metal oxide catalyst under isomerization reaction conditions effective to form a product mixture comprising one or more branched paraffins formed from each of the C5-C7 normal paraffins.
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