Method for producing monocyclic aromatic hydrocarbon having 6-8 carbon atoms

Patent metadata

Field	Value
Publication number	US-11420913-B2
Application number	US-201917272787-A
Country	US
Kind code	B2
Filing date	Sep 2, 2019
Priority date	Sep 3, 2018
Publication date	Aug 23, 2022
Grant date	Aug 23, 2022

Abstract

A method for producing a monocyclic aromatic hydrocarbon having 6 to 8 carbon atoms, including bringing a raw material which contains a light hydrocarbon having 2 to 7 carbon atoms as a main component into contact with a catalyst composition for producing a monocyclic aromatic hydrocarbon having 6 to 8 carbon atoms. The catalyst composition for producing a monocyclic aromatic hydrocarbon having 6 to 8 carbon atoms is coated with an amorphous silicon oxide compound and contains a crystalline aluminosilicate, and the silicon oxide compound is a silicon oxide compound derived from a compound represented by XnSi(OR)4-n, where X represents a hydrogen atom or an alkyl group, R represents an alkyl group, and n represents an integer of 0 to 4.

First claim

What is claimed is:

1. A method for producing a monocyclic aromatic hydrocarbon having 6 to 8 carbon atoms, the method comprising:
heating and stirring a catalyst containing a crystalline aluminosilicate and a compound represented by General Formula ( 1 ) in a nitrogen atmosphere at 50 ° C. to 110 ° C., followed by heat treatment at 300 ° C. to 600 ° C. in the presence of oxygen, to obtain a catalyst composition coated with an amorphous silicon oxide compound, and
bringing a raw material which contains a light hydrocarbon having 2 to 7 carbon atoms as a main component into contact with the catalyst composition to produce a monocyclic aromatic hydrocarbon having 6 to 8 carbon atoms;

wherein the compound represented by Formula (1) is:
X n Si(OR) 4-n   (1)

wherein X represents a hydrogen atom or an alkyl group, R represents an alkyl group, and n represents an integer of 0 to 4.

2. The method for producing a monocyclic aromatic hydrocarbon having 6 to 8 carbon atoms according to claim 1 , wherein a molar ratio of an acid quantity of the catalyst composition to Al is 1.25 or less, the acid quantity being defined by an amount of ammonia desorbed in a temperature range of 200° C. to 500° C. in an NH 3 -TPD method.

3. The method for producing a monocyclic aromatic hydrocarbon having 6 to 8 carbon atoms according to claim 1 , wherein the crystalline aluminosilicate is a pentasil zeolite.

4. The method for producing a monocyclic aromatic hydrocarbon having 6 to 8 carbon atoms according to claim 3 , wherein the crystalline aluminosilicate is an MFI zeolite.

5. The method for producing a monocyclic aromatic hydrocarbon having 6 to 8 carbon atoms according to claim 1 , wherein a content of gallium with respect to 100 parts by mass of the catalyst composition for producing a monocyclic aromatic hydrocarbon is 0.1 parts by mass or more and 10.0 parts by mass or less.

6. The method for producing a monocyclic aromatic hydrocarbon having 6 to 8 carbon atoms according to claim 1 , wherein the crystalline aluminosilicate contains gallium, and
a molar ratio (Ga/Al) of gallium to aluminum is 0.1 or more and 10.0 or less.

Assignees

• Eneos Corp
• Univ Tokyo
• Univ Kogakuin

Inventors

• Tsuneoka Hideo
• Iwasa Yasuyuki
• Araki Yasuhiro
• Okumura Kazu
• Ogura Masaru

Classifications

• C07C15/08

  Xylenes · CPC title

• C07C15/06

  Toluene · CPC title

• C07C15/04

  Benzene · CPC title

• C07C2/76

  by condensation of hydrocarbons with partial elimination of hydrogen · CPC title

• C10G35/095 Primary

  containing crystalline alumino-silicates, e.g. molecular sieves {(C10G35/065 takes precedence)} · CPC title