Chemistry of hydrocarbon compounds – Aromatic compound synthesis – By condensation of entire molecules or entire hydrocarbyl...
Reexamination Certificate
2007-06-28
2009-12-08
Dang, Thuan Dinh (Department: 1797)
Chemistry of hydrocarbon compounds
Aromatic compound synthesis
By condensation of entire molecules or entire hydrocarbyl...
C585S323000
Reexamination Certificate
active
07629498
ABSTRACT:
This disclosure relates to a process of manufacturing para-xylene, comprising (a) contacting a pygas feedstock and methylating agent with a catalyst under reaction conditions to produce a product having para-xylene, wherein the product has higher para-xylene content than the para-xylene content of the pygas feedstock; and (b) separating the para-xylene from the product of the step (a), wherein the catalyst comprises a molecular sieve having a Diffusion Parameter for 2,2-dimethylbutane of about 0.1-15 sec−1when measured at a temperature of 120° C. and a 2,2-dimethylbutane pressure of 8 kPa-a and the pygas comprises from about 1 to about 65 wt % benzene and from about 5 to 35 wt % toluene.
REFERENCES:
patent: 4101595 (1978-07-01), Chen et al.
patent: 6046372 (2000-04-01), Brown et al.
patent: 6680418 (2004-01-01), Brown
patent: 7119239 (2006-10-01), Johnson et al.
patent: 7176339 (2007-02-01), Iaccino et al.
patent: 7186873 (2007-03-01), Feng et al.
patent: 2004/0158111 (2004-08-01), Johnson et al.
patent: 2005/0075524 (2005-04-01), Feng et al.
patent: 00/69796 (2000-11-01), None
Yashima et al., “Alkylation on Synthetic Zeolites, I. Alkylation of Toluene with Methanol”, Journal of Catalysis, 16, (1970), pp. 273-280.
Brown Stephen Harold
Buchanan John Scott
Dang Thuan Dinh
ExxonMobil Chemical Patents Inc.
LandOfFree
Process of manufacturing para-xylene does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process of manufacturing para-xylene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process of manufacturing para-xylene will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4081883