GB1009556A - Production of xylene - Google Patents

Production of xylene

Info

Publication number
GB1009556A
GB1009556A GB47716/62A GB4771662A GB1009556A GB 1009556 A GB1009556 A GB 1009556A GB 47716/62 A GB47716/62 A GB 47716/62A GB 4771662 A GB4771662 A GB 4771662A GB 1009556 A GB1009556 A GB 1009556A
Authority
GB
United Kingdom
Prior art keywords
fraction
rich
charge
isobutylene
containing isobutylene
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.)
Expired
Application number
GB47716/62A
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.)
Air Products and Chemicals Inc
Original Assignee
Air Products and Chemicals Inc
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 Air Products and Chemicals Inc filed Critical Air Products and Chemicals Inc
Publication of GB1009556A publication Critical patent/GB1009556A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C15/00—Cyclic hydrocarbons containing only six-membered aromatic rings as cyclic parts
    • C07C15/02—Monocyclic hydrocarbons
    • C07C15/067—C8H10 hydrocarbons
    • C07C15/08—Xylenes
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
    • C07C2/76—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
    • C07C5/32—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen
    • C07C5/373—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen with simultaneous isomerisation
    • C07C5/393—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen with simultaneous isomerisation with cyclisation to an aromatic six-membered ring, e.g. dehydrogenation of n-hexane to benzene
    • C07C5/41—Catalytic processes
    • C07C5/412—Catalytic processes with metal oxides or metal sulfides
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2521/00—Catalysts comprising the elements, oxides or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium or hafnium
    • C07C2521/02—Boron or aluminium; Oxides or hydroxides thereof
    • C07C2521/04—Alumina
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2523/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
    • C07C2523/02—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of the alkali- or alkaline earth metals or beryllium
    • C07C2523/04—Alkali metals
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2523/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
    • C07C2523/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • C07C2523/24—Chromium, molybdenum or tungsten
    • C07C2523/26—Chromium
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

Xylenes are produced by passing a charge of C8 acyclic hydrocarbons free from unsaturates and rich in 2,2,4-trimethyl pentane at 510-594 DEG C. and pressures up to atmospheric over a catalyst comprising eta-alumina and 15-25% of chromium oxide (see parent Specification), separating the effluent from the dehydrogenation zone into an aromatics fraction, a C8 hydrocarbon fraction rich in C8 acyclic hydrocarbons including 2,2,4-trimethyl pentane and C8 monoolefins, and a C4 fraction containing isobutylene, dimerizing the isobutylene to form diisobutylenes, hydrogenating the dimer and the C8 fraction to produce fresh charge free from unsaturates and rich in 2,2,4-trimethylpentane, and recovering from the aromatics fraction a C8 concentrate rich in p-xylene. The C4 fraction with or without a fresh C4 charge containing isobutylene may be extracted with cold sulphuric acid and the extract containing isobutylene may be dimerized with a sulphuric acid catalyst, e.g. at 24-38 DEG C.
GB47716/62A 1961-12-26 1962-12-18 Production of xylene Expired GB1009556A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US16206961A 1961-12-26 1961-12-26

Publications (1)

Publication Number Publication Date
GB1009556A true GB1009556A (en) 1965-11-10

Family

ID=22584029

Family Applications (1)

Application Number Title Priority Date Filing Date
GB47716/62A Expired GB1009556A (en) 1961-12-26 1962-12-18 Production of xylene

Country Status (2)

Country Link
DE (1) DE1443364C3 (en)
GB (1) GB1009556A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2780392B1 (en) * 1998-06-25 2000-08-25 Rhodia Chimie Sa NEW ALUMINA, METHOD FOR PREPARING IT AND ITS USE AS CATALYST, CATALYST SUPPORT OR ADSORBENT

Also Published As

Publication number Publication date
DE1443364B2 (en) 1974-10-03
DE1443364C3 (en) 1975-06-19
DE1443364A1 (en) 1969-03-20

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