Method for converting olefin or alcohol and method for producing propylene or aromatic compound

Patent metadata

Field	Value
Publication number	US-9573862-B2
Application number	US-201314419135-A
Country	US
Kind code	B2
Filing date	Aug 9, 2013
Priority date	Aug 10, 2012
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

A method for converting an olefin or an alcohol has a pretreatment step of obtaining a conductive catalyst by a pretreatment for suppressing electrostatic charging of a non-conductive catalyst and a step of converting an olefin or an alcohol by a fluidized bed reaction using the conductive catalyst.

First claim

The invention claimed is:

1. A method for converting an olefin or an alcohol, comprising:
a pretreatment step of obtaining a conductive catalyst, which has an electrostatic deposition rate of less than 15 mass %, by
charging a fluidized bed reactor with a non-conductive catalyst having an electrostatic deposition rate of 15 mass % or more,
supplying a heated hydrocarbon gas to the fluidized bed reactor, and
depositing a conductive substance comprising carbon on the non-conductive catalyst; and

a step of converting the olefin or the alcohol by a fluidized bed reaction using the conductive catalyst,
wherein, in the pretreatment step, a gas supply rate is 0.40 m/sec or less in terms of gas flow rate in the fluidized bed reactor, and
in the step of converting the olefin or the alcohol, a gas supply rate is 0.5 m/sec or more in terms of gas flow rate during the fluidized bed reaction.

2. The method for converting the olefin or the alcohol according to claim 1 , wherein the non-conductive catalyst comprises a zeolite and/or silica.

3. The method for converting the olefin or the alcohol according to claim 1 , wherein the olefin comprises ethylene.

4. A method for producing propylene or an aromatic compound, comprising a step of obtaining propylene or the aromatic compound by the method according to claim 1 .

5. The method for converting the olefin or the alcohol according to claim 1 , wherein the non-conductive catalyst has a repose angle of 20° or more and 30° or less.

6. The method for converting the olefin or the alcohol according to claim 1 , wherein the non-conductive catalyst has a bulk density of 0.8 g/cm 3 or more and 1.3 g/cm 3 or less.

7. The method for converting the olefin or the alcohol according to claim 1 , wherein the deposition amount of carbon on the conductive catalyst is 4 mass % or more and 10 mass % or less.

Assignees

• Asahi Kasei Chemicals Corp

Inventors

• Iitsuka Takehiro
• Takamatsu Yoshikazu

Classifications

• C07C1/20

  starting from organic compounds containing only oxygen atoms as heteroatoms · CPC title

• B01J2208/00734

  Controlling static charge · CPC title

• B01J29/40 Primary

  of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively · CPC title

• C07C2/76

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

• B01J29/064

  containing iron group metals, noble metals or copper · CPC title