Producing method of monocyclic aromatic hydrocarbons and monocyclic aromatic hydrocarbon production plant

Patent metadata

Field	Value
Publication number	US-9388096-B2
Application number	US-201214119609-A
Country	US
Kind code	B2
Filing date	May 24, 2012
Priority date	May 24, 2011
Publication date	Jul 12, 2016
Grant date	Jul 12, 2016

Abstract

A producing method of monocyclic aromatic hydrocarbons in which reaction products including monocyclic aromatic hydrocarbons are produced by bringing an oil feedstock and an aromatic production catalyst into contact with each other, the oil feedstock having a 10 volume % distillation temperature of more than or equal to 140° C. and a 90 volume % distillation temperature of less than or equal to 380° C., the method including the steps of: introducing the oil feedstock into a fluidized-bed reaction apparatus housing the aromatic production catalyst; bringing the oil feedstock and the aromatic production catalyst into contact with each other in the fluidized-bed reaction apparatus; and introducing steam into the fluidized-bed reaction apparatus based on the introducing amount of the oil feedstock per hour.

First claim

The invention claimed is:

1. A producing method of monocyclic aromatic hydrocarbons in which reaction products including monocyclic aromatic hydrocarbons are produced by bringing an oil feedstock and an aromatic production catalyst into contact with each other, the oil feedstock having a 10 volume % distillation temperature of more than or equal to 140° C. and a 90 volume % distillation temperature of less than or equal to 380° C., the method comprising the steps of:
introducing the oil feedstock into a fluidized-bed reaction apparatus housing the aromatic production catalyst;
bringing the oil feedstock and the aromatic production catalyst into contact with each other in the fluidized-bed reaction apparatus;
introducing steam into the fluidized-bed reaction apparatus based on an introducing amount of the oil feedstock per hour;
when the introducing amount of the oil feedstock per hour decreases more than a predetermined introducing amount, adjusting the introducing amount of the steam per hour based on the difference amount of the introducing amount of the oil feedstock per hour; and
producing the monocyclic aromatic hydrocarbons,
wherein the step of adjusting the introducing amount of the steam is controlled by a relational expression defined as follows:
(Woil/MWoil)+(Wsteam/MWstream)=constant

wherein:
Woil: flow rate of the oil feed stock [kg/h],
MWoil: average molecular weight of the oil feedstock [kg/kgmol],
Wsteam: flow rate of steam [kg/h], and
MWsteam: molecular weight of steam [kg/kgmol].

2. The producing method of monocyclic aromatic hydrocarbons according to claim 1 , wherein
the fluidized-bed reaction apparatus is provided with
a fluidized-bed reactor housing the aromatic production catalyst,
a heat tank heating the aromatic production catalyst withdrawn from the inside of the fluidized-bed reactor by a combustion, and
a catalyst transfer pipe transferring the aromatic production catalyst heated at the heat tank to the fluidized-bed reactor,
wherein in the step of introducing steam, the steam is introduced into at least one of the fluidized-bed reactor and the catalyst transfer pipe.

Assignees

• Yanagawa Shinichiro
• Iwasa Yasuyuki
• Yasui Susumu
• Sugi Yoshishige
• Fukui Atsushi
• Nagumo Atsuro
• Hirohata Osamu
• Jx Nippon Oil & Energy Corp
• Chiyoda Corp

Inventors

• Yanagawa Shinichiro
• Iwasa Yasuyuki
• Yasui Susumu
• Sugi Yoshishige
• Fukui Atsushi
• Nagumo Atsuro
• Hirohata Osamu

Classifications

• C10G45/68 Primary

  Aromatisation of hydrocarbon oil fractions · CPC title

• C10G2400/30

  Aromatics · CPC title

• C10G11/18

  according to the "fluidised-bed" technique · CPC title

• C10G2300/301

  Boiling range · CPC title

• C10G45/70

  with catalysts containing platinum group metals or compounds thereof · CPC title