Mineral oils: processes and products – Chemical conversion of hydrocarbons – Cracking
Reexamination Certificate
2005-02-08
2005-02-08
Griffin, Walter D. (Department: 1764)
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Cracking
C208S20800M, C208S244000, C208S245000, C208S247000, C208S248000, C208S249000, C208S120010, C208S120200, C208S120250, C208S120350
Reexamination Certificate
active
06852214
ABSTRACT:
The sulfur content of liquid cracking products, especially the cracked gasoline, of the catalytic cracking process is reduced by the use of a sulfur reduction additive comprising a porous molecular sieve which contains a metal in an oxidation state above zero within the interior of the pore structure of the sieve. The molecular sieve is normally a large pore size zeolite such as USY or zeolite beta or an intermediate pore size zeolite such as ZSM-5. The metal is normally a metal of Period 4 of the Periodic Table, preferably zinc or vanadium. The sulfur reduction catalyst may be used in the form of a separate particle additive or as a component of an integrated cracking/sulfur reduction catalyst.
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Chester Arthur W.
Roberie Terry G.
Timken Hye Kyung Cho
Ziebarth Michael S.
Artale Beverly J.
Cross Charles A.
Griffin Walter D.
Mobil Oil Corporation
W. R. Grace & Co.,-Conn.
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