A process under development by Amoco Chemicals Corp. for increasing the yields of benzene and xylenes from the C/sub 7/-C/sub 8/ fraction of pyrolysis gasoline

Conference · Thu Feb 01 00:00:00 EST 1979 · Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)

OSTI ID:6726234

Feinstein, A I; Im, U K

A process for increasing the yields of benzene and xylenes from the C/sub 7/-C/sub 8/ fraction of pyrolysis gasoline, the aromatics conversion (AC) process, involves mixing the feed with hydrogen and recycle toluene and features a catalyst which can simultaneously disproportionate the toluene to benzene and xylenes, hydrodeethylate the ethylbenzene to benzene and ethane, and crack the C/sub 7/-C/sub 9/ nonaromatics to mainly C/sub 2/-C/sub 4/ alkanes without destroying xylenes. A typical feed containing 5.6Vertical Bar3< by wt of C/sub 1/-C/sub 5/ alkanes, 2.7Vertical Bar3< by wt of C/sub 7/-C/sub 9/ alkanes, 65.1Vertical Bar3< by wt of benzene, 10.3Vertical Bar3< by wt of toluene, 14.7Vertical Bar3< by wt of ethylbenzene, and 1.6Vertical Bar3< of xylenes gives a typical product which contains 12.6Vertical Bar3< by wt of C/sub 1/-C/sub 5/ alkanes, 21.0Vertical Bar3< by wt of benzene, 39.1Vertical Bar3< by wt of toluene, 0.6Vertical Bar3< by wt of ethylbenzene, 20.9Vertical Bar3< of xylenes, 5.3Vertical Bar3< of C/sub 9/ aromatics, and 0.5Vertical Bar3< of C/sub 10/ aromatics, and is thus similar to the calculated thermodynamic equilibrium composition at 800/sup 0/-900/sup 0/F. The fixed bed reactor operates at 800/sup 0/-900/sup 0/F, 150-500 psia, and a 5:1-10:1 hydrogen-hydrocarbon mole ratio. The process can be integrated with the hydrotreating required for preliminary removal of olefins and sulfur, thus giving to a considerable economic advantage and eliminating the usual solvent extraction stage used to separate aromatics from alkanes and naphthenes.

• Research Organization: Amoco Chem. Corp.
• OSTI ID: 6726234
• Report Number(s): CONF-790415-
• Journal Information: Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States), Vol. 24:1; Conference: 177. national meeting of the American Chemical Society, Honolulu, HI, USA, 1 Apr 1979
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BENZENE
CHEMICAL REACTION YIELD
GASOLINE
CRACKING
PYROLYSIS
XYLENES
CATALYSTS
HIGH TEMPERATURE
MEDIUM PRESSURE
PROCESS DEVELOPMENT UNITS
ALKYLATED AROMATICS
AROMATICS
CHEMICAL REACTIONS
DECOMPOSITION
FUELS
FUNCTIONAL MODELS
HYDROCARBONS
LIQUID FUELS
ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
THERMOCHEMICAL PROCESSES
YIELDS
020500* - Petroleum- Products &amp; By-Products
400301 - Organic Chemistry- Chemical &amp; Physicochemical Properties- (-1987)