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公开(公告)号：US20220112432A1
公开(公告)日：2022-04-14
申请号：US17496644
申请日：2021-10-07
Applicant: ExxonMobil Research and Engineering Company
Inventor： Wesley Sattler , Keith R. Hajkowski , Changmin Chun , Partha Nandi , Vera Grankina , Joseph E. Gatt , Ning Ma , Anastasios Skoulidas , William R. Gunther , Everett J. O'Neal
Abstract: Systems and methods are provided for using size-reversing materials in vessels where direct heating is used to at least partially provide heat for reforming reactions under cyclic reforming conditions. An example of a size-reversing material is the combination of NiO and Al2O3. It has been discovered that size-reversing materials can undergo a phase transition that can assist with re-dispersion of metal at elevated temperatures. This can assist with maintaining catalytic activity for reforming over longer time periods in the presence of cyclic reforming conditions.
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公开(公告)号：US20200377916A1
公开(公告)日：2020-12-03
申请号：US16870910
申请日：2020-05-09
Applicant: ExxonMobil Research and Engineering Company
Inventor： Partha Nandi , Xiaozhou Zhang , Mohor Chatterjee , Vera Grankina , Changyub Paek , Fang Cao
Abstract: The present disclosure relates to glycolipid compositions, methods for making glycolipid compositions, and their uses thereof. Glycolipid compositions can be prepared via yeast-mediated catalyzed reaction, and exhibit excellent surfactant properties having high corrosion inhibition performance, good reducing surface tension efficiency. Processes of the present disclosure can provide glycolipid compositions having one or more of: a ratio of lactonic glycolipids to glycolipid acylic esters is from about 1:10 to about 10:1, a molecular weight of from about 400 g/mol to about 10,000 g/mol, a corrosion rate of carbon steel from about 0.5 MPY to about 100 MPY at room temperature and at pH 4-6. Furthermore, aqueous solutions of the glycolipid compositions of the present disclosure can have a surface tension of from about 20 mN/m to about 80 mN/m.
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公开(公告)号：US10995352B2
公开(公告)日：2021-05-04
申请号：US16870910
申请日：2020-05-09
Applicant: ExxonMobil Research and Engineering Company
Inventor： Partha Nandi , Xiaozhou Zhang , Mohor Chatterjee , Vera Grankina , Changyub Paek , Fang Cao
Abstract: The present disclosure relates to glycolipid compositions, methods for making glycolipid compositions, and their uses thereof. Glycolipid compositions can be prepared via yeast-mediated catalyzed reaction, and exhibit excellent surfactant properties having high corrosion inhibition performance, good reducing surface tension efficiency. Processes of the present disclosure can provide glycolipid compositions having one or more of: a ratio of lactonic glycolipids to glycolipid acylic esters is from about 1:10 to about 10:1, a molecular weight of from about 400 g/mol to about 10,000 g/mol, a corrosion rate of carbon steel from about 0.5 MPY to about 100 MPY at room temperature and at pH 4-6. Furthermore, aqueous solutions of the glycolipid compositions of the present disclosure can have a surface tension of from about 20 mN/m to about 80 mN/m.
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公开(公告)号：US20210108235A1
公开(公告)日：2021-04-15
申请号：US17068147
申请日：2020-10-12
Applicant: ExxonMobil Research and Engineering Company
Inventor： Xiaozhou Zhang , Zarath M Summers , Partha Nandi , Mark P Hagemeister , Jihad M Dakka , Mohor Chatterjee , Vera Grankina
IPC: C12P7/42 , C07C51/377 , C12P19/02 , C12P19/14 , C13K1/00
Abstract: Hydroxycarboxylic acids may be biosynthesized from a carbonaceous feedstock and then isolated through forming and subsequently hydrolyzing an intermediate sophorolipid. After biosynthesizing a hydroxycarboxylic acid in a cell culture medium or otherwise providing a hydroxycarboxylic acid in a first aqueous medium, the hydroxycarboxylic acid and glucose may be converted into at least one sophorolipid by a suitable microorganism or an enzyme cocktail. The at least one sophorolipid may be then be separated from the cell culture medium or first aqueous medium and then hydrolyzed in a second aqueous medium to form the hydroxycarboxylic acid and glucose as free components separate from the cell culture medium or first aqueous medium. The hydroxycarboxylic acid is present as a phase separate from the second aqueous medium and the glucose remains in the second aqueous medium.
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