公开(公告)号：US20210053890A1

公开(公告)日：2021-02-25

申请号：US16958383

申请日：2019-01-08

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Constantinos P. Bokis ,  Javier Gazman ,  Monica D. Lotz ,  Michael P. Lanci ,  Catherine M. Dorsi ,  Scott J. WEigel

IPC: C07C7/00 ,  C07C5/367 ,  C07C5/27 ,  C07C2/66 ,  C07C5/10 ,  C07C2/74 ,  C07C15/14 ,  C07C7/04 ,  C07C7/14 ,  B01D3/10

Abstract: Processes are described for separating 3,4′- and 4,4′-dimethylbiphenyl from a mixture comprising at least 3,3′-, 3,4′- and 4,4′-dimethylbiphenyl. In the processes, the mixture is cooled to produce a crystallization product comprising at least of the 4,4′-dimethylbiphenyl from the feed mixture and a first mother liquor product. The first mother liquor product is distilled to produce a bottoms stream enriched in 4,4′-dimethylbiphenyl as compared with the first mother liquor product and an overhead stream deficient in 4,4′-dimethylbiphenyl as compared with the first mother liquor product. The overhead stream is then cooled to produce a second crystallization product comprising at least part of the 3,4′-dimethylbiphenyl from the overhead stream and a second mother liquor product.

公开(公告)号：US20200325086A1

公开(公告)日：2020-10-15

申请号：US16073494

申请日：2017-02-22

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Jihad M. Dakka ,  Lorenzo C. Decaul ,  Michael P. Lanci ,  Wei Tang

IPC: C07C5/367 ,  C07C15/14 ,  C07C13/28 ,  C07C5/10

Abstract: In a process for producing a methyl-substituted biphenyl compound, at least one methyl-substituted cyclohexylbenzene compound of the formula: wherein each of m and n is independently 1, 2, or 3, is contacted with hydrogen in the presence of a hydrogenation catalyst to produce a hydrogenation reaction product comprising at least one methyl-substituted bicyclohexane compound, and the methyl-substituted bicyclohexane compound is then contacted with a dehydrogenation catalyst to produce a dehydrogenation reaction product comprising at least one methyl-substituted biphenyl compound.

公开(公告)号：US11236028B2

公开(公告)日：2022-02-01

申请号：US16958383

申请日：2019-01-08

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Constantinos P. Bokis ,  Javier Guzman ,  Monica D. Lotz ,  Michael P. Lanci ,  Catherine M. Dorsi ,  Scott J. Weigel

IPC: C07C7/00 ,  B01D3/10 ,  C07C2/66 ,  C07C2/74 ,  C07C5/10 ,  C07C5/27 ,  C07C5/367 ,  C07C7/04 ,  C07C7/14 ,  C07C15/14

Abstract: Processes are described for separating 3,4′- and 4,4′-dimethylbiphenyl from a mixture comprising at least 3,3′-, 3,4′- and 4,4′-dimethylbiphenyl. In the processes, the mixture is cooled to produce a crystallization product comprising at least of the 4,4′-dimethylbiphenyl from the feed mixture and a first mother liquor product. The first mother liquor product is distilled to produce a bottoms stream enriched in 4,4′-dimethylbiphenyl as compared with the first mother liquor product and an overhead stream deficient in 4,4′-dimethylbiphenyl as compared with the first mother liquor product. The overhead stream is then cooled to produce a second crystallization product comprising at least part of the 3,4′-dimethylbiphenyl from the overhead stream and a second mother liquor product.

公开(公告)号：US11198660B2

公开(公告)日：2021-12-14

申请号：US16073494

申请日：2017-02-22

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Jihad M. Dakka ,  Lorenzo C. Decaul ,  Michael P. Lanci ,  Wei Tang

IPC: C07C5/367 ,  C07C5/10 ,  C07C15/14 ,  C07C13/28 ,  C07C5/13 ,  B01J29/74 ,  B01J29/06

Abstract: In a process for producing a methyl-substituted biphenyl compound, at least one methyl-substituted cyclohexylbenzene compound of the formula: wherein each of m and n is independently 1, 2, or 3, is contacted with hydrogen in the presence of a hydrogenation catalyst to produce a hydrogenation reaction product comprising at least one methyl-substituted bicyclohexane compound, and the methyl-substituted bicyclohexane compound is then contacted with a dehydrogenation catalyst to produce a dehydrogenation reaction product comprising at least one methyl-substituted biphenyl compound.