502 / | HD | CATALYST, SOLID SORBENT, OR SUPPORT THEREFOR: PRODUCT OR PROCESS OF MAKING |
100 | DF | CATALYST OR PRECURSOR THEREFOR {12} |
300 | DF | .~ Metal, metal oxide or metal hydroxide {10} |
305 | DF | .~.~ Of Group VI (i.e., Cr, Mo, W or Po) {8} |
313 | .~.~.~ And Group VIII metal containing (i.e., iron or platinum group) {3} | |
314 | DF | .~.~.~.~> Iron group metal and Group III metal containing (i.e., Fe, Co or Ni and Sc, Y, Al, Ga, In or Tl) |
315 | DF | .~.~.~.~> Nickel containing |
316 | DF | .~.~.~.~> Iron containing |