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Title: 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

Abstract

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 bemore » 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.« less

Authors:
;
Publication Date:
Research Org.:
Amoco Chem. Corp.
OSTI Identifier:
6726234
Alternate Identifier(s):
OSTI ID: 6726234
Report Number(s):
CONF-790415-
Journal ID: CODEN: ACPCA
Resource Type:
Conference
Journal Name:
Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)
Additional Journal Information:
Journal Volume: 24:1; Conference: 177. national meeting of the American Chemical Society, Honolulu, HI, USA, 1 Apr 1979
Country of Publication:
United States
Language:
English
Subject:
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 & By-Products; 400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)

Citation Formats

Feinstein, A.I., and Im, U.K. 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. United States: N. p., 1979. Web.
Feinstein, A.I., & Im, U.K. 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. United States.
Feinstein, A.I., and Im, U.K. Thu . "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". United States.
@article{osti_6726234,
title = {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},
author = {Feinstein, A.I. and Im, U.K.},
abstractNote = {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.},
doi = {},
journal = {Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)},
number = ,
volume = 24:1,
place = {United States},
year = {1979},
month = {2}
}

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