US 2007/0062848 A1Published application

Aromatic saturation and ring opening process

AssigneeNOVA Chemicals (International) S.A.

InventorsMichael Oballa, Vasily Simanzhenkov, Jens Weitkamp, Roger Glaser, Yvonne Traa, Fehime Demir

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Abstract

Less conventional sources of hydrocarbon feedstocks such as oil sands, tar sands and shale oils are being exploited. These feedstocks generate a larger amount of heavy oil, gas oil, asphaltene products and the like containing multiple fused aromatic ring compounds. These multiple fused aromatic ring compounds can be converted into feed for a hydrocarbon cracker by first hydrogenating at least one ring in the compounds and subjecting the resulting compound to a ring opening and cleavage reaction. The resulting product comprises lower paraffins suitable for feed to a cracker, higher paraffins suitable for example as a gasoline fraction and mono aromatic ring compounds (e.g. BTX) that may be further treated.

Claims31

Dependent claims

A process for hydrocracking a feed comprising not less than 20 weight % of one or more aromatic compounds containing at least two fused aromatic rings which compounds are unsubstituted or substituted by up to two C1-4 alkyl radicals to produce a product stream comprising not less than 35 weight % of a mixture of C2-4 alkanes comprising:

(i) passing said feed stream to a ring saturation unit at a temperature from 300° C. to 500° C. and a pressure from 2 to 10 MPa together with from 100 to 300 kg of hydrogen per 1,000 kg of feedstock over an aromatic hydrogenation catalyst to yield a stream in which not less than 60 weight % of said one or more aromatic compounds containing at least two rings which compounds are unsubstituted or substituted by up to two C1-4 alkyl radicals at least one of the aromatic rings has been completely saturated;
(ii) passing the resulting stream to a ring cleavage unit at a temperature from 200° C. to 600° C. and a pressure from 1 to 12 MPa together with from 50 to 200 kg of hydrogen per 1,000 kg of said resulting stream over a ring cleavage catalyst;
and
(iii) separating the resulting product into a C2-4 alkanes stream, a liquid paraffinic stream and an aromatic stream.

1 more element

In an integrated process for the upgrading of an initial hydrocarbon comprising not less than 5 weight % of one or more aromatic compounds containing at least two fused aromatic rings which compounds are unsubstituted or substituted by up to two C1-4 alkyl radicals comprising subjecting the hydrocarbon to several distillation steps to yield an intermediate stream comprising not less than 20 weight % of one or more aromatic compounds containing at least two fused aromatic rings which compounds are unsubstituted or substituted by up to two C1-4 alkyl radicals the improvement comprising:

(i) passing said intermediate stream to a ring saturation unit at a temperature from 300° C. to 500° C. and a pressure from 2 to 10 MPa together with from 100 to 300 kg of hydrogen per 1,000 kg of feedstock over an aromatic hydrogenation catalyst to yield a stream in which in not less than 60 weight % of said one or more aromatic compounds containing at least two rings which compounds are unsubstituted or substituted by up to two C1-4 alkyl radicals at least one of the aromatic rings has been completely saturated;
(ii) passing the resulting stream to a ring cleavage unit at a temperature from 200° C. to 600° C. and a pressure from 1 to 12 MPa together with from 50 to 200 kg of hydrogen per 1,000 kg of said resulting stream over a ring cleavage catalyst;
and
(iii) separating the resulting product into a C2-4 alkanes stream, a liquid paraffinic stream and an aromatic stream.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 11/515,018Filed 1 Sep 2006
Priority: CA 2,520,43320 Sep 2005
Published: 22 Mar 2007
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

C10G 45/44
Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds: hydrogenation of the aromatic hydrocarbons
C10G 45/48
Characterised by the catalyst used: containing nickel or cobalt metal, or compounds thereof
C10G 45/50
Containing nickel or cobalt metal, or compounds thereof: in combination with chromium, molybdenum or tungsten metal, or compounds thereof
C10G 45/58
Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds: to change the structural skeleton of some of the hydrocarbon content…