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US 12,584,072 B2Granted
Process and system for base oil production
AssigneeChevron U.S.A. Inc.
InventorsSubhasis Bhattacharya, Yihua Zhang, Guan-Dao Lei, Ajit R. Pradhan
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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.
Claims22
A hydroisomerization process, useful to make dewaxed products including base oils, the process comprising
- contacting a hydrocarbon feed with a first hydroisomerization catalyst under first hydroisomerization conditions to produce a first product;
- wherein, the first hydroisomerization catalyst comprises an SSZ-91 molecular sieve comprising at least one modifying metal selected from Groups 7 to 10 and 14 of the Periodic Table;
- and
- contacting the first product with a second hydroisomerization catalyst under second hydroisomerization conditions to produce a second product;
- wherein, the second hydroisomerization catalyst comprises an SSZ-32x molecular sieve comprising at least one modifying metal selected from Groups 7 to 10 and 14 of the Periodic Table.
2 more elements
Dependencies are inferred from the claim text.