| abstract |
A METHOD OF PREPARING A CATALYST HAVING THE ELEMENTS AND THE PROPORTIONS INDICATED BY THE FOLLOWING EMPIRICAL FORMULA:VSBmAaDdOxWHEREA IS ONE OR MORE TI, SN, WHERE SN IS ALWAYS PRESENTD IS ONE OR MORE LI, MG, CA, SR, BA, CO, FE, CR, GA, NI, ZN, GE, NB, ZR, MO, W, CU, TE, TA, SE, BI, CE, IN, AS, B, AL, AND MN WHEREINM IS 0.5 TO 10A IS GREATER THAN ZERO TO 10D IS ZERO TO 10X IS DETERMINED BY THE OXIDATION STATE OF THE CATIONS PRESENT,COMPRISING MAKING AN AQUEOUS SLURRY OF A MIXTURE OF SOURCE BATCH MATERIALS COMPRISING COMPOUNDS OF SAID ELEMENTS TO BE INCLUDED IN THE FINAL CATALYST, FOLLOWED BY DRYING AND HEAT CALCINING THE MIXTURE TO AN ACTIVE CATALYST, WHEREIN THE SOURCE BATCH MATERIAL FOR THE TIN IS A SOLUTION WHICH COMPRISES SNO2 XH2O WHEREIN X >0 DISPERSED IN TETRAALKYL AMMONIUM HYDROXIDE WHEREIN THE TETRAALKYL AMMONIUM HYDROXIDE IS DEFINED BY THE FOLLOWING FORMULA:CnH2n+1NOHWHEREIN 5>N>1,DRYING SAID SLURRY AND CALSINING THE MIXTURE TO ANUPPER CALCINING TEMPERATURE OF AT LEAST 500 °C. |