公开(公告)号：US11603340B2

公开(公告)日：2023-03-14

申请号：US17014991

申请日：2020-09-08

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Mohsen N. Harandi ,  Mitch L. Hindman ,  Suriyanarayanan Rajagopalan

IPC: C07C5/22 ,  C07C41/09 ,  C10G3/00 ,  C10L1/02 ,  C10L3/12

Abstract: Methanol-to-gasoline conversion may be performed using a heavy gasoline treatment, followed by a separation operation. Methanol may be converted into a first product mixture comprising dimethyl ether (DME) under DME formation conditions. In a methanol-to-gasoline (MTG) reactor, the first product mixture may be converted under MTG conversion conditions to produce a second product mixture comprising light gasoline hydrocarbons and untreated heavy gasoline hydrocarbons. The untreated heavy gasoline hydrocarbons may be separated from the light gasoline hydrocarbons and transferred to a heavy gasoline treatment (HGT) reactor. The untreated heavy gasoline hydrocarbons may be catalytically reacted in the HGT reactor to form a third product mixture. A heavy hydrocarbon fraction may be separated from the third product mixture. The heavy hydrocarbon fraction includes heavy gasoline hydrocarbons having a lower boiling endpoint than does the untreated heavy gasoline hydrocarbons.

公开(公告)号：US11591527B2

公开(公告)日：2023-02-28

申请号：US16943513

申请日：2020-07-30

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Mohsen N. Harandi ,  Yira Y. Aponte Torrealba

IPC: C10G35/095 ,  B01J29/40

Abstract: Provided are novel process for upgrading naphtha and increasing the yield of reformate. Olefinic naphtha and light paraffins are combined and fed to a catalytic fluidized bed reactor maintained at a temperature about 775° F. and about 1250° F. and an operating pressure between about 10 psig and about 500 psig to produce a product comprising at least 1 wt. % higher C5+ hydrocarbon than the combined feed and at least 55 wt. % aromatics.

公开(公告)号：US11530173B2

公开(公告)日：2022-12-20

申请号：US17643867

申请日：2021-12-13

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Mohsen N. Harandi ,  Randall J. Meyer

IPC: C07C5/333 ,  B01J29/40 ,  B01J8/24

Abstract: A method may include: contacting a light paraffin feed comprising ethane, propane, butane, naphtha or combinations thereof with a restrained catalyst in a reactor; converting at least a portion of the light paraffin feed to ethylene, propylene, or combinations thereof with an olefin selectivity of at least 70 wt. % and methane selectivity of less than 15 wt. %; and withdrawing a product stream from the reactor.

公开(公告)号：US11415438B2

公开(公告)日：2022-08-16

申请号：US16930786

申请日：2020-07-16

Applicant: ExxonMobil Technology and Engineering Company

Inventor： George A. Khoury ,  Erin S. Percell ,  Mohsen N. Harandi ,  Nicholas W. Silvestri

IPC: G01D21/02 ,  G06N3/04 ,  G06N3/08

Abstract: A method for identifying sensor drift can include: setting an autocorrelation threshold for a sensor in a long-short term memory (LSTM) model developed based on historical process measurements from an analogous sensor to a sensor; collecting measured data from the sensor; applying the LSTM model to the measured data from the sensor, wherein applying the LSTM model comprises: applying the LSTM model to the measured data from the sensor to yield LSTM predicted data; calculating key performance indicators (KPIs) of the LSTM data based on an accumulated slow drift error (ASDE) model, wherein the KPIs comprise an error, an accumulated prediction error, an accumulated slow-drift error, and an estimated autocorrelation; and identifying sensor drift when the estimated autocorrelation violates the autocorrelation threshold.