US2010155302A1PendingUtilityA1

Purification of ultralow sulfur diesel fuel

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Individually held — no corporate assignee on recordPriority: Dec 18, 2008Filed: Dec 18, 2008Published: Jun 24, 2010
Est. expiryDec 18, 2028(~2.4 yrs left)· nominal 20-yr term from priority
Inventors:Mark P. KaminskyDavid W. LeyshonGopalakrishan JuttuAllen B. QuakenbushLawrence M. Candela
C10G 25/003C10G 2400/04C10G 67/06C10G 45/02
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Claims

Abstract

The invention is a method of purifying an ultralow sulfur diesel fuel which contains polycyclic aromatic color bodies. The method comprises contacting the ULSD fuel in the liquid phase with a coal-based activated carbon adsorbent having a surface area ranging from 800 to 1500 m 2 /g and containing pores having pore size greater than 20 Å, and recovering a purified diesel product having a decreased color bodies content.

Claims

exact text as granted — not AI-modified
1 . A method of purifying an ultralow sulfur diesel fuel containing polycyclic aromatic color bodies, which comprises contacting the ultralow sulfur diesel fuel in the liquid phase with a coal-based activated carbon adsorbent having a surface area ranging from 800 to 1500 m 2 /g and containing pores having pore size greater than 20 Å, and recovering a purified diesel product having a decreased polycyclic aromatic color bodies content. 
     
     
         2 . The method of  claim 1  wherein the ultralow sulfur diesel fuel has a color greater than 2.5 as measured by ASTM D 6045. 
     
     
         3 . The method of  claim 1  wherein the purified diesel product has a color less than 2.5 as measured by ASTM D 6045. 
     
     
         4 . The method of  claim 1  wherein the carbon adsorbent has a surface area ranging from 800 to 1200 m 2 /g. 
     
     
         5 . The method of  claim 1  wherein at least 10 percent of the total pore volume of the carbon adsorbent is in pores having a pore size greater than 20 Å. 
     
     
         6 . The method of  claim 1  wherein at least 30 percent of the total pore volume of the carbon adsorbent is in pores having a pore size greater than 20 Å. 
     
     
         7 . The method of  claim 1  wherein the carbon adsorbent is a granulated activated carbon. 
     
     
         8 . The method of  claim 1  wherein the contacting is performed at a temperature within the range of about 10° C. to 60° C. 
     
     
         9 . A process for producing an ultralow sulfur diesel fuel, comprising:
 (a) hydrodesulfurizing a diesel fuel stream in the presence of the supported hydrodesulfurization catalyst to produce an ultralow sulfur diesel fuel having a color greater than 2.5 as measured by ASTM D 6045;   (b) contacting the ultralow sulfur diesel fuel having a color greater than 2.5 in the liquid phase with a coal-based activated carbon adsorbent having a surface area ranging from 800 to 1500 m 2 /g and containing pores having pore size greater than 20 Å; and   (c) recovering an ultralow sulfur diesel product having a color less than 2.5 as measured by ASTM D 6045.   
     
     
         10 . The method of  claim 9  wherein the carbon adsorbent has a surface area ranging from 800 to 1200 m 2 /g. 
     
     
         11 . The method of  claim 9  wherein at least 10 percent of the total pore volume of the carbon adsorbent is in pores having a pore size greater than 20 Å. 
     
     
         12 . The method of  claim 9  wherein at least 30 percent of the total pore volume of the carbon adsorbent is in pores having a pore size greater than 20 Å. 
     
     
         13 . The method of  claim 9  wherein the carbon adsorbent is a granulated activated carbon. 
     
     
         14 . The method of  claim 9  wherein the contacting is performed at a temperature within the range of about 10° C. to 60° C.

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