公开(公告)号：US20200299141A1

公开(公告)日：2020-09-24

申请号：US16751945

申请日：2020-01-24

Applicant: ExxonMobil Research and Engineering Company

Inventor： Yi Du ,  Bradley D. Wooler ,  Stuart E. Smith ,  Brenda A. Raich ,  Clarence Chase ,  Lesheng Wang

IPC: C01B32/354 ,  C01B32/33

Abstract: Sulfur-crosslinked olefins, particularly sulfur-crosslinked heavy hydrocarbon products having one or more sulfur-crosslinked olefin moieties, may undergo pyrolysis to form sulfur-doped porous carbon having high BET surface area values. Pyrolysis to form the sulfur-doped porous carbon may be particularly efficacious in the presence of a hydroxide base. BET surface areas up to 2000 m2/g or even higher may be obtained. Such sulfur-doped porous carbon may be prepared by combining a heavy hydrocarbon product with sulfur, heating to a first temperature state to form a liquefied reaction mixture containing a sulfur-crosslinked heavy hydrocarbon, homogeneously mixing a hydroxide base with the liquefied reaction mixture, and pyrolyzing the sulfur-crosslinked heavy hydrocarbon to form sulfur-doped porous carbon.

公开(公告)号：US20210301211A1

公开(公告)日：2021-09-30

申请号：US16830440

申请日：2020-03-26

Applicant: ExxonMobil Research and Engineering Company

Inventor： Stuart E. Smith ,  Sebastin K. Seider ,  Kazem V. Edmond

IPC: C10B55/00 ,  C10B57/06 ,  C10G9/00

Abstract: Systems and methods are provided for controlling the morphology of coke produced during delayed coking. The morphology control is achieved in part by introducing elemental sulfur into the coker feedstock prior to coking. The elemental sulfur can be introduced into the feed under conditions so that the sulfur is well-dispersed within the feed for a sufficient period of time. This can allow for relatively even reaction of sulfur with components throughout the feed, resulting in a relatively small, uniform domain size distribution for the coke produced during delayed coking. This coke can correspond to shot coke. By producing coke with a small and relatively uniform domain size distribution, the risk of uneven heating within the coke can be reduced or minimized.

公开(公告)号：US20190382664A1

公开(公告)日：2019-12-19

申请号：US16425255

申请日：2019-05-29

Applicant: ExxonMobil Research and Engineering Company

Inventor： Stuart E. Smith ,  Eric B. Sirota ,  Stephen H. Brown

IPC: C10C3/08

Abstract: Methods are provided for reducing or minimizing the temperature dependence of a pitch feed or fraction for use in carbon fiber production, such as a mesophase pitch feed or fraction or an isotropic pitch feed or fraction. A pitch sample can be characterized to determine a characteristic temperature and a characteristic viscosity for the sample. One or more solvent extraction processes can also be performed on the pitch and/or the extract and raffinate fractions formed by the solvent extraction(s). The resulting raffinate and extract fractions are then used to form a modified pitch fraction with a T0 value that is lower than the T0 value of the original pitch. The modified pitch fraction can optionally also have a different ηinf value relative to the original pitch.