JPS5780331A - Isomerization of xylene - Google Patents

Isomerization of xylene

Info

Publication number
JPS5780331A
JPS5780331A JP55154625A JP15462580A JPS5780331A JP S5780331 A JPS5780331 A JP S5780331A JP 55154625 A JP55154625 A JP 55154625A JP 15462580 A JP15462580 A JP 15462580A JP S5780331 A JPS5780331 A JP S5780331A
Authority
JP
Japan
Prior art keywords
catalyst
temp
xylene
oxygen
hydrogen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP55154625A
Other languages
Japanese (ja)
Other versions
JPS6248647B2 (en
Inventor
Yasuo Yamazaki
Atsuji Sakai
Tamio Onodera
Koji Sumitani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Teijin Ltd
Original Assignee
Teijin Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Teijin Ltd filed Critical Teijin Ltd
Priority to JP55154625A priority Critical patent/JPS5780331A/en
Publication of JPS5780331A publication Critical patent/JPS5780331A/en
Publication of JPS6248647B2 publication Critical patent/JPS6248647B2/ja
Granted legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/584—Recycling of catalysts

Landscapes

  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Catalysts (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

PURPOSE: To activate the catalyst in the catalytic isomerization of xylene in the presence of hydrogen using a Pd-containing crystalline aluminosilicate catalyst, by interrupting the reaction, introducing an oxygen-containing gas through the catalyst bed, and heating at a specific temp.
CONSTITUTION: Xylene is isomerized by contacting a raw material containing a mixture of xylene isomers including ethylbenzene with a Pd-containging crystalline aluminosilicate catalyst (e.g. zeolite ZSM-5) in the presence of hydrogen. In the above process, the catalyst covered with deposited carbonaceous material is activated by contacting with an oxygen-containing gas at an elevated temp. The activation is carried out by raising the inlet temp. of the oxygen-containing gas slowly from ≤200°C to 330W390°C (pref. from 150°C to 370°C) keeping the max. temp. in the catalyst bed below 400°C while controlling the hot-spot temp. in the catalyst bed always below 50°C (esp. below 30°C) during combustion of the carbonaceous material, and then reducing the catalyst with hydrogen.
COPYRIGHT: (C)1982,JPO&Japio
JP55154625A 1980-11-05 1980-11-05 Isomerization of xylene Granted JPS5780331A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55154625A JPS5780331A (en) 1980-11-05 1980-11-05 Isomerization of xylene

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55154625A JPS5780331A (en) 1980-11-05 1980-11-05 Isomerization of xylene

Publications (2)

Publication Number Publication Date
JPS5780331A true JPS5780331A (en) 1982-05-19
JPS6248647B2 JPS6248647B2 (en) 1987-10-15

Family

ID=15588267

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55154625A Granted JPS5780331A (en) 1980-11-05 1980-11-05 Isomerization of xylene

Country Status (1)

Country Link
JP (1) JPS5780331A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2962677A3 (en) 2014-07-03 2016-01-20 Shofu Inc. Dental curable composition including chain transfer agent

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5019693A (en) * 1973-05-18 1975-03-01

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5019693A (en) * 1973-05-18 1975-03-01

Also Published As

Publication number Publication date
JPS6248647B2 (en) 1987-10-15

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