Patent EA-001619-B1 (EA)
Title: Process for producing lubricating oil base stock
Inventor: ZIEMER JAMES N
IPC: C10G47/10
Filed: 1997-07-15
Abstract: 1. A process for producing a lubricating oil base stock involving hydrotreating said basestock in, at least one reaction zone which comprises two catalysts, the first of which is a isodewaxing catalyst, the second is a catalyst selected from the group consisting of noble metal amorphous catalysts, noble metal hydrocracking catalysts, or combinations thereof, wherein said oil base stock is treated successively over said second catalyst and the first catalyst. 2. The process according to Claim 1, wherein the isodewaxing catalyst comprises an intermediate pore size molecular sieve having a crystallite size of no more than about 0.5 , having pores with a minimum pore diameter of at least 4.8 A and with a maximum pore diameter of no more than 7.1 A, the catalyst: a) having sufficient acidity so that 0.5 g thereof when positioned in a 6,35 mm internal diameter tube reactor converts at least 50% of hexadecane at a temperature of 370 degree C., a pressure of 8273 kPa, a hydrogen flow of 160 ml/min and a feed rate of I ml/hr, and b) exhibiting 40 or greater isomerization selectivity which is defined as   (wt% branched C16 in product)/( wt% branched C16 in product + wt% C13 in product)x100   when used under conditions leading to 96% conversion of hexadecane. 3. The process according to Claim 1, wherein the isodewaxing catalyst comprises a zeolite selected from the group consisting of ZSM-5, ZSM-12, ZSM-21, ZSM-22, ZSM-23, ZSM-35, ZSM-38, ZSM-57, offretite, ferrierite and SUZ-4. 4. The process according to Claim 1, wherein the isodewaxing catalyst comprises a zeolite selected from the group consisting of SSZ-3 1, SSZ-32, SSZ-36 and SSZ-41. 5. The process according to Claim 1, wherein the isodewaxing catalyst comprises a non-zeolitic molecular sieve selected from the group consisting of SAPO-11, SAPO-31, SAPO-41, MAPO- 11 and MAPO-31. 6. The process according to Claim 1, wherein the second catalyst is a noble metal amorphous catalyst comprising between about 0.1 and about I weight percent of a noble metal hydrogenation and an amorphous matrix material. 7. The process according to Claim 6, wherein the noble metal hydrogenation component is selected from the group consisting of platinum, palladium or mixtures thereof, and wherein the amorphous matrix material comprises silica-alumina. 8. The process according to Claim 7, wherein the second catalyst comprises a platinum-palladium alloy and a SiO2/AI2O3 oxide matrix, wherein the molar ratio of platinum to palladium in the alloy is between about 2.5:1 and about 1:2.5. 9. The process according to Claim 1, wherein the second catalyst is a noble metal hydrocracking catalyst comprising between about 0.1 and about I weight percent of a noble metal hydrogenation component and from about 0.1 to about 20 weight percent of a zeolite selected from the group consisting of faujasite, zeolite Y and ultrastable zeolite Y. 10. The process according to Claim 1 at reaction conditions which include a reaction temperature in the range of about 288 degree C to about 454 degree C, a reaction pressure in the range of about 0,103 to about 24,1 MPa and a feed rate in the range of about 0.1 to about 20 hr<-1>. 11. The process according to Claim 1, further comprising contacting the dewaxed oil base stock with hydrogen at hydrogenation reaction conditions over a noble metal hydrogenation catalyst to produce a lubricating oil base stock. 12. The process according to Claim 1 is conducted simultaneously in at least two separate and parallel trains. 13. The process according to claim 12 for producing at least one light lubricating oil base stock and at least one heavy lubricating oil base stock.