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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：US20220403258A1
公开(公告)日：2022-12-22
申请号：US17807019
申请日：2022-06-15
Inventor： Xinrui Yu , Jihad M. Dakka , Guang Cao , Wesley Sattler
Abstract: Systems and methods for producing an isomerization product. One or more isomerization reactors comprising a catalyst may be used to process an isomerization feedstock comprising a primary n-paraffin reactant and hydrogen gas, and the isomerization reactor may be operated at a pressure parameter at which the partial pressure of the primary n-paraffin is within about 70% to about 130% of its equilibrium vapor pressure to isomerize the primary n-paraffin reactant.
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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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公开(公告)号：US20240425759A1
公开(公告)日：2024-12-26
申请号：US18274021
申请日：2022-01-27
Inventor： Guang Cao , James R. Bielenberg , August W. Bosse , David C. Dankworth , Sumathy Raman , Michael Siskin
Abstract: Methods are provided for upgrading of pyrolysis carbon in order to allow for conversion of the pyrolysis carbon into higher value products. Instead of attempting to convert methane into a high value carbon product (such as carbon nanotubes) and H2 in a single reaction step, pyrolysis conditions can be used to form H2 and pyrolysis carbon. The pyrolysis carbon can then be treated in order to convert the pyrolysis carbon (H to C atomic ratio of less than 0.20) into a product with a higher hydrogen content (H to C atomic ratio of 0.25-0.9 or 2.0-7.0 wt % H). The treatment can correspond to exposing the pyrolysis carbon with hydrogen in the presence of a catalyst, exposing the pyrolysis carbon to conditions for alkylation, or a sequential combination thereof. This can convert the pyrolysis carbon into heavy hydrocarbon products that are resin-like solids at room temperature.
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