Mixed metal oxide additives

Abstract

The present invention is directed to methods for mitigating the deleterious effect of at least one metal on an FCC catalyst. This objective is achieved by using a mixed metal oxide compound comprising magnesium and aluminum, that has not been derived from a hydrotalcite compound, and having an X-ray diffraction pattern displaying at least a reflection at a two theta peak position at about 43 degrees and about 62 degrees, wherein the ratio of magnesium to aluminum in the compound is from about 0.6:1 to about 10:1. In one embodiment, the ratio of magnesium to aluminum in the compound is from about 1:1 to about 6:1. In one embodiment, the ratio of magnesium to aluminum in the compound is from about 1.5:1 to about 10:1. In another embodiment, the invention is directed to methods wherein the ratio of magnesium to aluminum in the compound is from about 1.5:1 to about 6:1.

1 . A method of increasing the performance of a fluid catalytic cracking (FCC) catalyst in the presence of at least one metal comprising:
 contacting a fluid stream from an FCC unit comprising the fluid catalytic cracking catalyst with a compound comprising calcium, magnesium and aluminum, and having an X-ray diffraction pattern displaying at least a reflection at a 2-theta peak position at about 43 degrees and about 62 degrees, and wherein the ratio of magnesium to aluminum in the compound is from about 0.6:1 to about 10:1.   
     
     
         2 . The method of  claim 1 , wherein the compound increases the catalytic conversion of a feedstock. 
     
     
         3 . The method of  claim 1 , wherein the compound increases gasoline production from a feedstock. 
     
     
         4 . The method of  claim 1 , wherein the compound increases LPG production from a feedstock. 
     
     
         5 . The method of  claim 1 , wherein the compound decreases LCO production from a feedstock. 
     
     
         6 . The method of  claim 1 , wherein the compound decreases the bottoms production from a feedstock. 
     
     
         7 . The method of  claim 1 , wherein the compound decreases the coke production from a feedstock. 
     
     
         8 . The method of  claim 1 , wherein the compound decreases the hydrogen gas production from feedstock. 
     
     
         9 . The method of  claim 1 , wherein the compound increases the octane rating of gasoline produced from a feedstock. 
     
     
         10 . The method of  claim 1 , wherein the compound decreases the sulfur content of gasoline produced from a feedstock. 
     
     
         11 . The method of  claim 1 , wherein the compound mitigates the decrease in FCC catalyst crystallinity caused by a metal. 
     
     
         12 . The method of  claim 1 , wherein the FCC catalyst comprises Y-faujasite zeolite. 
     
     
         13 . The method of  claim 1 , wherein the compound mitigates the reduction, caused by a metal, in the height/intensity of the 2-theta peak at 6.3 degrees for an X-ray power diffraction of a zeolite in the FCC catalyst. 
     
     
         14 . The method of  claim 1 , wherein the compound mitigates the reduction in the surface area of a zeolite in the FCC catalyst. 
     
     
         15 . The method of  claim 1 , wherein the compound increases the catalytic conversion of a feedstock. 
     
     
         16 . The method of  claim 1 , wherein the compound increases the gasoline production from a feedstock. 
     
     
         17 . The method of  claim 1 , wherein the compound increases the LPG production from a feedstock. 
     
     
         18 . The method of  claim 1 , wherein the compound increases the octane rating of gasoline produced from a feedstock. 
     
     
         19 . The method of  claim 1 , wherein the compound decreases at least a member from group consisting of the LCO production from a feedstock the bottoms production from a feedstock, the coke production from a feedstock, the hydrogen gas production from a feedstock, and the sulfur content of gasoline produced from a feedstock. 
     
     
         20 . The method of  claim 1 , wherein the compound comprises an additional metal component.