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Catalyst for production of monocyclic aromatic hydrocarbons and method of producing monocyclic aromatic hydrocarbons

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Catalyst for production of monocyclic aromatic hydrocarbons and method of producing monocyclic aromatic hydrocarbons


A catalyst is provided for production of monocyclic aromatic hydrocarbons having a carbon number of 6 to 8 from feedstock in which a 10 vol % distillation temperature is 140° C. or higher and a 90 vol % distillation temperature is 380° C. or lower. The catalyst contains crystalline aluminosilicate including large-pore zeolite having a 12-membered ring structure, and intermediate-pore zeolite having a 10-membered ring structure.
Related Terms: Hydrocarbon Silica Zeolite Crystallin

USPTO Applicaton #: #20130030232 - Class: 585476 (USPTO) - 01/31/13 - Class 585 
Chemistry Of Hydrocarbon Compounds > Aromatic Compound Synthesis >By Ring Opening, Removal, Degradation, Or Shift On Chain Or Other Ring

Inventors: Shinichiro Yanagawa, Masahide Kobayashi, Kazuaki Hayasaka

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The Patent Description & Claims data below is from USPTO Patent Application 20130030232, Catalyst for production of monocyclic aromatic hydrocarbons and method of producing monocyclic aromatic hydrocarbons.

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TECHNICAL FIELD

The present invention relates to a catalyst for producing monocyclic aromatic hydrocarbons and a method of producing monocyclic aromatic hydrocarbons, which are capable of producing monocyclic aromatic hydrocarbons from oil containing a large amount of polycyclic aromatic hydrocarbons.

Priority is claimed on Japanese Patent Application No. 2010-010262, filed Jan. 20, 2010, the content of which is incorporated herein by reference.

BACKGROUND ART

Light cycle oil (hereinafter, referred to as “LCO”), which is cracked light oil produced by a fluidized catalytic cracking, contains a large amount of polycyclic aromatic hydrocarbons, and has been used as light oil or heavy oil. However, in recent years, investigations have been conducted to obtain, from LCO, monocyclic aromatic hydrocarbons having a carbon number of 6 to 8 (such as benzene, toluene, xylene and ethylbenzene), which may be used as high-octane gasoline base materials or petrochemical raw materials, and offer significant added value.

For example, Patent Document 1 to Patent Document 3 disclose methods of producing monocyclic aromatic hydrocarbons from polycyclic aromatic hydrocarbons contained in large amounts within LCO and the like by using zeolite catalysts.

In addition, as a method of producing monocyclic aromatic hydrocarbons through reaction using zeolite catalysts, Patent Document 4 discloses a method of producing monocyclic aromatic hydrocarbons from aromatic compounds having a carbon number of 9 or more by using beta-type zeolite, which has a 12-membered ring structure and a large pore size, as a catalyst.

Patent Document 5 discloses a method of producing monocyclic aromatic hydrocarbons from paraffin-based hydrocarbons having a carbon number of 2 to 12 by using beta-type zeolite as a catalyst.

CITATION LIST Patent Document

[Patent Document 1] Japanese Unexamined Patent Application, First publication No. H3-2128 [Patent Document 2] Japanese Unexamined Patent Application, First publication No. H3-52993 [Patent Document 3] Japanese Unexamined Patent Application, First publication No. H3-26791 [Patent Document 4] Published Japanese Translation No. H4-504577 of the PCT International Publication [Patent Document 5] Japanese Unexamined Patent Application, First publication No. H2-184517

DISCLOSURE OF INVENTION Technical Problem

However, in the methods disclosed in Patent Document 1 to Patent Document 3, the yields of monocyclic aromatic hydrocarbons having a carbon number of 6 to 8 have not been entirely satisfactory. In addition, the methods disclosed in Patent Document 4 and Patent Document 5 are not methods of obtaining both monocyclic aromatic hydrocarbons having a carbon number of 6 to 8 and aliphatic hydrocarbons having a carbon number of 3 to 4 from feedstock in which a 10 vol % distillation temperature is 140° C. or higher and a 90 vol % distillation temperature is 380° C. or lower.

An object of the invention is to provide a catalyst for production of monocyclic aromatic hydrocarbons and a method of producing monocyclic aromatic hydrocarbons, which are capable of producing monocyclic aromatic hydrocarbons having a carbon number of 6 to 8 from feedstock containing polycyclic aromatic hydrocarbons with high yield.

Solution to Problem

(1) According to an embodiment of the invention, a catalyst is provided for production of monocyclic aromatic hydrocarbons having a carbon number of 6 to 8 from feedstock in which a 10 vol % distillation temperature is 140° C. or higher and a 90 vol % distillation temperature is 380° C. or lower. The catalyst contains crystalline aluminosilicate including large-pore zeolite having a 12-membered ring structure, and intermediate-pore zeolite having 10-membered ring structure.

(2) The catalyst for production of monocyclic aromatic hydrocarbons according to (1), wherein in the crystalline aluminosilicate, a mass ratio of the large-pore zeolite to the intermediate-pore zeolite (large-pore zeolite/intermediate-pore zeolite) is preferably 2/98 to 50/50

(3) The catalyst for production of monocyclic aromatic hydrocarbons according to (1) or (2), wherein the large-pore zeolite is preferably a zeolite of any type selected from a BEA type, an FAU type, and an MOR type.

(4) The catalyst for production of monocyclic aromatic hydrocarbons according to any one of (1) to (3), wherein the large-pore zeolite is preferably BEA-type zeolite.



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stats Patent Info
Application #
US 20130030232 A1
Publish Date
01/31/2013
Document #
13522867
File Date
01/20/2011
USPTO Class
585476
Other USPTO Classes
502 67
International Class
/
Drawings
0


Hydrocarbon
Silica
Zeolite
Crystallin


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