Process for reforming hydrocarbon feedstocks over a sulfur sensitive catalyst
AssigneeChevron Chemical Company
InventorRobert A. Innes
Life of this patent
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Abstract
Provided is a process for catalytically reforming a hydrocarbon feedstock using a highly sulfur sensitive catalyst. The process comprises contacting the hydrocarbon in a reaction zone, with the hydrocarbon feed and catalyst flowing in opposite directions. Once the catalyst has passed through the reaction zone, it is then passed to a regeneration zone for regeneration. The process eliminates the need of passing the hydrocarbon feed through a sulfur sorber prior to entry into the reaction zone, as the spent catalyst which is leaving the reaction zone for regeneration acts as a sulfur sorber and removes the sulfur from the feed entering the reaction zone.
Claims23
A process for reforming a hydrocarbon feedstock containing at least 20 ppbw sulfur over a sulfur sensitive catalyst, which comprises:
- contacting the hydrocarbon feed with the sulfur sensitive catalyst in a reaction zone, with the hydrocarbon feed and catalyst flowing in opposite directions through the reaction zone;
- such that the hydrocarbon feedstock containing at least 20 ppbw sulfur initially contacts spent catalyst, which catalyst acts as a sorbent for the sulfur contained in the feed;
- removing the spent catalyst from the reaction zone once it has passed through and has contacted the sulfur contaminated hydrocarbon feed and absorbs sulfur therefrom;
- and
- passing the removed spent catalyst to a regeneration zone.
A process for reforming a hydrocarbon feedstock containing at least 20 ppbw sulfur over a sulfur sensitive catalyst comprised of a Group VIII metal containing L-zeolite, and which comprises:
- contacting the hydrocarbon feed with the sulfur sensitive catalyst in a reaction zone, comprised of from 2 to 6 reactors in series, with the hydrocarbon feed and catalyst flowing in opposite directions on a continuous basis through the reaction zone such that the hydrocarbon feedstock containing at least 20 ppbw sulfur initially contacts spent catalyst, which catalyst acts as a sorber for the sulfur contained in the feed;
- removing the catalyst from the reaction zone once it has passed through and has contacted the sulfur contaminated hydrocarbon feed and absorbed sulfur therefrom, and passing the removed catalyst to a regeneration zone for regeneration on a continuous basis;
- and
- recycling regenerated catalyst to the reaction zone.
Dependencies are inferred from the claim text.