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公开(公告)号：US20240301300A1
公开(公告)日：2024-09-12
申请号：US18261998
申请日：2022-01-17
Applicant: CHEVRON U.S.A. INC.
Inventor： Viorel DUMA , Subhasis BHATTACHARYA , Guan-Dao LEI
CPC classification number: C10G65/12 , C10G47/18 , C10G47/20 , C10G2300/1059 , C10G2300/202 , C10G2300/205 , C10G2300/301 , C10G2300/302
Abstract: A method of producing a base oil product by hydroprocessing unconverted oil from a hydrocracker in an unconverted oil upgrade reactor to produce upgraded unconverted oil and dewaxing the upgraded unconverted oil to produce the base oil product.
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公开(公告)号：US20240076564A1
公开(公告)日：2024-03-07
申请号：US18262178
申请日：2022-01-18
Applicant: CHEVRON U.S.A. INC.
Inventor： Yihua ZHANG , Subhasis BHATTACHARYA , Guan-Dao LEI
CPC classification number: C10G67/0418 , B01J29/7461 , C10G45/62 , C10G45/64 , C10G65/043 , C10G2300/302 , C10G2300/304 , C10G2300/70 , C10G2400/10
Abstract: Described are processes to produce base oils with one more improved properties, e.g., lower aromatics, economically and/or efficiently. In some embodiments, the processes relate to two stage (or more) hydrofinishing which advantageously provides base oils with lower aromatics than comparable one stage processes.
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公开(公告)号：US20230348798A1
公开(公告)日：2023-11-02
申请号：US18042724
申请日：2021-08-30
Applicant: CHEVRON U.S.A. INC.
Inventor： Subhasis BHATTACHARYA , Yihua ZHANG , Guan-Dao LEI , Ajit R. PRADHAN
CPC classification number: C10G45/62 , B01J29/74 , C10G45/64 , C10G65/043 , C10G2300/302 , C10G2300/304 , C10G2400/10
Abstract: An improved process and catalyst system for making a base oil product and for improving base oil cloud point and pour point characteristics, while also providing good product yields. The process and catalyst system generally involves the use of a layered catalyst system comprising an SSZ-91 catalyst and an SSZ-32X catalyst arranged to sequentially contact a hydrocarbon feedstock with both catalysts and thereby provide dewaxed base oil products.
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