Chemistry of hydrocarbon compounds – Plural serial diverse syntheses – To produce aromatic
Reexamination Certificate
2003-03-28
2009-11-24
Dang, Thuan Dinh (Department: 1797)
Chemistry of hydrocarbon compounds
Plural serial diverse syntheses
To produce aromatic
C585S467000, C585S533000
Reexamination Certificate
active
07622621
ABSTRACT:
In a process for preparing an alkylaromatic hydrocarbon composition an olefinic hydrocarbon mixture and an aromatic compound are contacted under alkylation conditions with an aromatic alkylation catalyst selected from a homogeneous acid catalyst and heterogeneous acid catalyst comprising a molecular sieve having an X-ray diffraction pattern including d-spacing maxima at 12.4±0.25, 6.9±0.15, 3.57±0.07 and 3.42±0.07 Angstroms. The olefinic hydrocarbon mixture comprises at least 5 wt % by weight of mono-olefin oligomers of the empirical formula:in-line-formulae description="In-line Formulae" end="lead"?CnH2nin-line-formulae description="In-line Formulae" end="tail"?wherein n is greater than or equal to 10, the mono-olefin oligomers comprising at least 20 percent by weight of olefins having at least 12 carbon atoms, and the olefins having at least 12 carbon atoms having an average of from 0.8 to 2.0 C1-C3alkyl branches per carbon chain. Sulfonation of the alkylaromatic hydrocarbon product produces an alkylaryl sulfonate mixture that exhibits advantageous properties, such as biodegradability and hard and cold water performance.
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Caers Raphael Frans
Cheng Jane C.
Duncan Carolyn B.
Propp James L.
Saleh Ramzi Y.
Dang Thuan Dinh
ExxonMobil Chemical Patents Inc.
Tyus Darryl M.
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