Processes for producing diesel from unconventional feedstocks
AssigneeChevron U.S.A. Inc.
InventorsKamala R. Krishna, Yihua Zhang, Guan-Dao Lei, Adeola Florence Ojo
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Abstract
Described herein are processes for hydroisomerising an unconventional feedstock using a hydroisomerisation catalyst comprising zeolite SSZ-91, zeolite SSZ-32, or zeolite SSZ-32x to provide a diesel fuel.
Claims36
A process for hydroisomerising a diesel feedstock, the process comprising contacting a diesel feedstock with a hydroisomerisation catalyst,
- wherein the diesel feedstock comprises or is a biocomponent feed selected from vegetable oils and animal fats which comprise triglycerides and free fatty acids;
- or a Fischer-Tropsch feed having a 90% distillation temperature of less than about 750° F. (about 399° C.), and the hydroisomerisation catalyst comprises zeolite SSZ-91.
A process for upgrading a diesel feedstock, the process comprising:
- contacting a diesel feedstock with a hydroisomerisation catalyst under hydroisomerisation conditions to provide a diesel fuel having a reduced cloud point and a reduced pour point compared to the cloud point and pour point of the diesel feedstock,
- wherein the diesel feedstock comprises or is a biocomponent feed selected from vegetable oils and animal fats which comprise triglycerides and free fatty acids;
- or a Fischer-Tropsch feed having a 90% distillation temperature of less than about 750° F. (about 399° C.), and the hydroisomerisation catalyst comprises zeolite SaSZ-91.
A process-for hydroisomerising a diesel feedstock, the process comprising contacting a diesel feedstock with a hydroisomerisation catalyst, wherein the diesel feedstock comprises or is a biocomponent feed or a Fischer-Tropsch feed, and the hydroisomerisation catalyst comprises zeolite SSZ-91, and wherein the diesel feedstock is contacted with the hydroisomerisation catalyst and hydrogen under hydroisomerisation conditions in an isomerization reactor, the hydroisomerisation conditions being:
- temperature in the range of about 390° F. to about 800° F. (199° C. to 427° C.);
- pressure in the range of about 15 to about 3000 psig (0.10 to 20.68 MPa gauge);
- feed rate of diesel feedstock to the reactor containing the hydroisomerisation catalyst at a rate in the range from about 0.1 to about 20 h−1 LHSV;
- and
- hydrogen and diesel feedstock fed to the reactor in a ratio from about 2000 to about 10,000 standard cubic feet H2 per barrel diesel feedstock (from about 360 to about 1800 m3 H2/m3 feed).
A process for hydroisomerising a diesel feedstock, the process comprising contacting a diesel feedstock with a hydroisomerisation catalyst, wherein the diesel feedstock comprises or is a biocomponent feed or a Fischer-Tropsch feed, and the hydroisomerisation catalyst comprises zeolite SSZ-91, and further comprising contacting the diesel feedstock with a hydrotreating catalyst under hydrotreating conditions prior to contacting the diesel feedstock with the hydroisomerisation catalyst.
A process for providing a diesel fuel exhibiting a lower cloud point and a lower pour point compared to the cloud point and pour point of a diesel feedstock from which the diesel fuel is produced, the process comprising contacting a diesel feedstock and a hydroisomerisation catalyst comprising zeolite SSZ-91, under hydroisomerisation conditions to provide a diesel fuel exhibiting a lower cloud point and a lower pour point compared to the cloud point and pour point of a diesel feedstock from which the diesel fuel is produced, wherein the diesel feedstock comprises or is a biocomponent feed selected from vegetable oils and animal fats which comprise triglycerides and free fatty acids or a Fischer-Tropsch feed having a 90% distillation temperature of less than about 750° F. (about 399° C.).
Dependencies are inferred from the claim text.