Method for producing hydro-refining catalyst
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United States of America Patent
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Jun 7, 2005
Grant Date -
Sep 23, 2004
app pub date -
Jun 27, 2002
filing date -
Jun 27, 2001
priority date (Note) -
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Abstract
A method for producing a hydrorefining catalyst has the steps of preparing an impregnation solution containing molybdenum, phosphorus, cobalt and/or nickel, and citric acid, bringing a carrier into contact with the impregnation solution, and then calcinating the carrier in an oxidizing atmosphere at a temperature at which citric acid is removed. In the impregnation solution, a molar ratio of molybdenum/phosphorus is 6 to 13, a molar ratio of (cobalt and nickel)/phosphorus is 0.5 to 7, and a molar ratio of (cobalt and nickel)/citric acid is 0.5 to 2. As for the hydrorefining catalyst obtained by this method, the activity of the catalyst is high, and the catalyst life is long.
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