New Microsoft Word Document (2) - Claims: The invention...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Claims: The invention claimed is: 1. A process for removing sulfur from a sulfur-containing naphtha feed comprising: (1) contacting the feed with a hydrotreating catalyst under hydrotreating conditions such that at least 50 wt. % of olefins in the feed are preserved and at least 95 wt. % of the sulfur compounds in the feed are converted to produce a hydrotreated effluent, (2) contacting the hydrotreated effluent with a mercaptan removal agent to produce a second effluent containing less than 30 wppm total sulfur, based on second effluent, the mercaptan removal being at least one of mercaptan extraction, mercaptan removal by depressurization, mercaptan removal by thermal treatment, physical adsorption, or membrane separation, and (3) contacting the second effluent with an adsorbent to produce a naphtha product containing less than 10 wppm total sulfur, based on naphtha product, the adsorbent consisting essentially of at least one reactive metal in a metallic state on an inorganic support, wherein the at least one reactive metal consists of one or more elements selected from Groups 1, 2, and 5-12 and wherein the inorganic support consists of one or more support materials selected from alumina, silica, silica-alumina, magnesia, titania, zirconia, hafnia, carbon, and a clay. 2. The process of claim 1 wherein the hydrotreating catalyst contains at least one of Ni, Co, Mo or W on an alumina support. 3. The process of claim 2 wherein the hydrotreating catalyst is a Mo/Co catalyst including a MoO3 concentration of 1 to 10 wt % based on weight of catalyst, a CoO concentration of 0.1 to 5 wt %, and a Co/Mo atomic ratio of about 0.1 to 1.0. 4. The process of claim 1 wherein the hydrotreating conditions in step (1) include temperatures of from 200 to 425° C., pressures of from 525 to 5617 kPa, liquid hourly space velocities of from 0.1 to 15 hr−1, and hydrogen feed rates of from 178 to 1068 m3/m3. 5. The process of claim 1 wherein the second hydrotreating step includes second hydrotreating conditions.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6. The process of claim 5 wherein the second hydrotreating conditions are the hydrotreating conditions of step (1) except that the temperatures are at least 10° C. higher than those of step (1) and the liquid hourly space velocities are 1.5 times greater than those of step (1). 7. The process of claim 1 wherein the mercaptan extraction is by caustic extraction. 8. The process of claim 1 wherein the mercaptan removal is by at least one of depressurization or thermal treatment. 9. The process of claim 1 wherein at least 75 wt. % of olefins are preserved in step (2). 10. The process of claim 1 wherein the adsorbent contains active metal functions in the absence of hydrogen. 11. The process of claim 1 wherein the naphtha product contains less than 5 wppm sulfur.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/17/2011 for the course CHEM ENGG 101 taught by Professor Mister during the Spring '11 term at University of Engineering & Technology.

Page1 / 9

New Microsoft Word Document (2) - Claims: The invention...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online