Process for cracking nitrogen-containing feedstocks
AssigneeUnion Oil Company of California
InventorsMario L. Occelli, Edward J. Aitken
Life of this patent
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Abstract
Hydrocarbon feedstocks containing relatively high levels of nitrogen contaminants are converted to products of lower average molecular weight by first mixing the feedstock with a dicarboxylic acid such as oxalic acid and then contacting the resultant mixture with a cracking catalyst in a cracking zone under cracking conditions in the substantial absence of added molecular hydrogen. The use of a dicarboxylic acid in lieu of a mineral acid such as sulfuric acid or nitric acid results in less corrosion to FCC unit internals and less emissions of sulfur and nitrogen oxides from the FCC unit regenerator.
Claims20
A process for the catalytic cracking of a nitrogen-containing hydrocarbon feedstock which comprises:
- (a) mixing said feedstock with a solid dicarboxylic acid;
- and
- (b) contacting the mixture formed in step (a) with a cracking catalyst under cracking conditions in the substantial absence of added molecular hydrogen in a cracking zone to convert components of said feedstock into lower molecular weight constituents.
A process for the catalytic cracking of a nitrogen-containing hydrocarbon feedstock which comprises:
- (a) mixing said feedstock with solid oxalic acid;
- and
- (b) contacting the mixture formed in step (a) with a cracking catalyst under cracking conditions in the substantial absence of added molecular hydrogen in a cracking zone to convert components of said feedstock into lower molecular weight constituents.
Dependencies are inferred from the claim text.