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US 4,359,594 AGranted
Novel process for preparing ethylbenzene
AssigneeTexaco Inc.
InventorsJohn A. Patterson, Wheeler C. Crawford, James R. Wilson
Life of this patent
Estimating the term…
Abstract
Vinyl cyclohexene is converted to ethylbenzene and styrene at 170.degree. C.-360.degree. C. in the presence of a hydrogen transfer catalyst typified by IrCl(CO)(Ph.sub.3 P).sub.2.
Claims26
The method which comprises
- passing a charge stream containing vinyl cyclohexene and R'NO.sub.2, wherein R' is alkyl, cycloalkyl, aryl, aralkyl, or alkaryl, into contact with homogeneous hydrogen transfer catalyst at hydrogen transfer conditions thereby forming product stream containing ethylbenzene;
- and
- recovering said product stream containing ethylbenzene.
The method which comprises
- passing a charge stream containing vinyl cyclohexene and R'NO.sub.2 into contact with, as homogeneous hydrogen transfer catalyst
- MX.sub.a (CO).sub.b (R.sub.3 P).sub.c
- wherein a, b and c are integers 1-2 and a+b+c is 4, M is a Group VIII noble metal, X is halogen, R' is a hydrocarbon moiety selected from the group consisting of alkyl, cycloalkyl, aryl, alkaryl, and aralkyl, and R' is alkyl, cycloalkyl, aralkyl, aryl or alkaryl, thereby forming product stream containing ethylbenzene;
- and
- recovering said product stream containing ethylbenzene.
2 more elements
The method which comprises
- passing a charge stream containing vinyl cyclohexene and nitrobenzene into contact with, as homogeneous hydrogen transfer catalyst,
- IrCl(CO) (Ph.sub.3 P).sub.2
- thereby forming a product stream containing ethylbenzene;
- and
- recovering said product stream containing ethylbenzene.
2 more elements
The method for preparing ethylbenzene which comprises
- passing a charge stream containing 4-vinyl-1-cyclohexene and nitrobenzene at 170.degree. C.-180.degree. C. into contact with, as homogeneous catalyst
- MX(CO) (R.sub.3 P).sub.2
- wherein M is a Group VIII noble metal, X is halogen, and R is a hydrocarbon moiety selected from the group consisting of alkyl, cycloalkyl, aryl, alkaryl, and aralkyl, thereby forming product stream containing ethylbenzene;
- and
- recovering said product stream containing ethylbenzene.
2 more elements
The method which comprises
- passing charge stream containing vinyl cyclohexene and R'NO.sub.2 into contact with, as homogeneous hydrogen transfer catalyst, M'X.sub.n wherein M' is rhenium or a Group VIII noble metal of valence n, and X is halogen, thereby forming product stream containing ethylbenzene;
- and
- recovering said product stream containing ethylbenzene.
The method which comprises passing charge stream containing vinyl cyclohexene and R'NO.sub.2 into contact with, as homogeneous hydrogen transfer catalyst, a salt of a halo-acid of a Group VIII noble metal thereby forming product stream containing ethylbenzene;
- and
- recovering said product stream containing ethylbenzene.
The method which comprises
- passing a charge stream containing vinyl cyclohexene and R'NO.sub.2, wherein R' is alkyl, cycloalkyl, aryl, aralkyl, or alkaryl, into contact with a homogeneous hydrogen transfer catalyst at hydrogen transfer conditions thereby forming product stream containing light ends, styrene, R'NH.sub.2, unreacted R'NO.sub.2, vinyl cyclohexene, and product ethylbenzene;
- flashing said product stream thereby separating said light ends from a flashed bottoms stream;
- fractionating said bottoms stream thereby forming an overhead containing vinyl cyclohexene and ethylbenzene;
- fractionating said overhead containing vinyl cyclohexene and ethylbenzene thereby forming an ethylbenzene bottoms stream;
- and
- recovering said ethylbenzene bottoms stream.
3 more elements
The method which comprises
- passing a charge stream containing vinyl cyclohexene and R'NO.sub.2, wherein R" is alkyl, cycloalkyl, aryl, aralkyl, or alkaryl, into contact with a homogeneous hydrogen transfer catalyst at hydrogen transfer conditions including temperature of 170.degree. C.-205.degree. C. thereby forming product stream containing ethylbenzene;
- and
- recovering said product stream containing ethylbenzene.
The method which comprises
- passing a charge stream containing vinyl cyclohexene and nitrobenzene into contact with a homogeneous hydrogen transfer catalyst at hydrogen transfer conditions thereby forming product stream containing light ends, styrene, aniline, unreacted nitrobenzene, vinyl cyclohexene, and product ethylbenzene;
- flashing said product stream thereby separating said light ends from a flashed bottoms stream;
- fractionating said bottoms stream thereby forming an overhead containing vinyl cyclohexene and ethylbenzene;
- fractionating said overhead containing vinyl cyclohexene and ethylbenzene thereby forming an ethylbenzene bottoms stream;
- and
- recovering said ethylbenzene bottoms stream.
3 more elements
Dependencies are inferred from the claim text.