Appeal No. 1998-0556
Application No. 08/367,418
APPENDIX
17. The method according to claim 11 wherein said
zeolitic dewaxing catalyst comprises from .01 to 2 wt% noble
metal.
18. The method according to claim 11 wherein said
zeolitic dewaxing catalyst comprises from .1 to 1 wt%
platinum.
19. The method according to claim 11 wherein said
injection of ammonia is made at at least one point along the
length of the dewaxer reactor.
20. The method according to claim 11 wherein said
injection of ammonia is made at at least three points along
the length of the dewaxer reactor.
11. A method of controlling the stability of an
isomerization dewaxing process in which a waxy hydrocarbon
fraction is contacted under dewaxing conditions with a
zeolitic dewaxing catalyst comprising zeolite beta in a
dewaxing reactor having an inlet and an outlet, the method
comprising injecting ammonia vapor into the reactor to contact
the catalyst in amounts sufficient to maintain operating
temperatures in said dewaxing reactor below 900EF.
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