0 10 0operating conditionstemperature u00b0 c 510 504lhsv hr 1 1 83 1 65pressure psig 0 0resultsinduction periods hrs 24 23 5molar phenol selectivity 1 93 7 89 5molar methanol selectivity 2 72 5 59 5production rate lbs 2 19 3 14 06 xylenol hr cuft catalyst catalyst life 3 42 0 80 0______________________________________ 1 the molar phenol selectivity is defined as the ratio of phenol converted to 2 6 xylenol to phenol converted to 2 6 xylenol and by products multiplied by 100 the amount of phenol converted to orthocresol is not included in the definition as it is recycled in the feed stream if desired 2 the molar methanol selectivity is defined as the ratio of methanol reacted to form 2 6 xylenol to the methanol reacted to form 2 6 xylenol and by products multiplied by 100 the amount of methanol converted to ortho cresol is not included in the definition as it is recycled in the feed stream if desired 3 the catalyst life is defined as the time during which the production rate drops to 50 of the initial production as can be seen from the above table the life of the catalyst of example 1 was found to be 42 0 hours while that of example 2 was found to be 80 hours an increase of almost 100 the procedures of examples 1 and 2 were repeated substituting.