GB959854A - Demethylation of methyl-substituted aromatic hydrocarbons - Google Patents

Demethylation of methyl-substituted aromatic hydrocarbons

Info

Publication number
GB959854A
GB959854A GB983762A GB983762A GB959854A GB 959854 A GB959854 A GB 959854A GB 983762 A GB983762 A GB 983762A GB 983762 A GB983762 A GB 983762A GB 959854 A GB959854 A GB 959854A
Authority
GB
United Kingdom
Prior art keywords
methyl
potassium
oxide
aromatic hydrocarbons
substituted aromatic
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
GB983762A
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.)
Monsanto Chemicals Ltd
Monsanto Chemical Co
Original Assignee
Monsanto Chemicals Ltd
Monsanto Chemical Co
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 Monsanto Chemicals Ltd, Monsanto Chemical Co filed Critical Monsanto Chemicals Ltd
Publication of GB959854A publication Critical patent/GB959854A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C4/00—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms
    • C07C4/08—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by splitting-off an aliphatic or cycloaliphatic part from the molecule
    • C07C4/12—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by splitting-off an aliphatic or cycloaliphatic part from the molecule from hydrocarbons containing a six-membered aromatic ring, e.g. propyltoluene to vinyltoluene
    • C07C4/14—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by splitting-off an aliphatic or cycloaliphatic part from the molecule from hydrocarbons containing a six-membered aromatic ring, e.g. propyltoluene to vinyltoluene splitting taking place at an aromatic-aliphatic bond
    • C07C4/20—Hydrogen being formed in situ, e.g. from steam
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C4/00—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms
    • C07C4/08—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by splitting-off an aliphatic or cycloaliphatic part from the molecule
    • C07C4/12—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by splitting-off an aliphatic or cycloaliphatic part from the molecule from hydrocarbons containing a six-membered aromatic ring, e.g. propyltoluene to vinyltoluene
    • C07C4/14—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by splitting-off an aliphatic or cycloaliphatic part from the molecule from hydrocarbons containing a six-membered aromatic ring, e.g. propyltoluene to vinyltoluene splitting taking place at an aromatic-aliphatic bond
    • C07C4/18—Catalytic processes
    • 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
    • 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
    • C07C2523/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of the iron group metals or copper
    • C07C2523/74—Iron group metals
    • C07C2523/745—Iron
    • 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
    • C07C2523/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of the iron group metals or copper
    • C07C2523/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups C07C2523/02 - C07C2523/36
    • C07C2523/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups C07C2523/02 - C07C2523/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • C07C2523/85—Chromium, molybdenum or tungsten
    • C07C2523/86—Chromium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Catalysts (AREA)

Abstract

Methyl-substituted aromatic hydrocarbons are demethylated by passing with steam over a dehydrogenation catalyst at 500-1,000 DEG C. The feed may be a methyl or poly-methyl benzene, naphthalene, anthracene or phenanthrene and in the case of poly-methyl compounds one or all of the methyl groups may be removed. The catalyst may be a ferric oxide-potassium oxide, magnesium oxide-iron oxide-potassium carbonate, silica-alumina-nickel, iron oxide-zinc oxide promoted with copper, potassium or sodium, and ferric oxide together with oxides of copper and potassium, magnesium and potassium or chromium and potassium. Atmospheric pressure is preferred and 0.5-10 lb. of steam are added per pound of hydrocarbon. A fixed bed, fluidized bed or tubular reactor may be used.
GB983762A 1961-03-15 1962-03-14 Demethylation of methyl-substituted aromatic hydrocarbons Expired GB959854A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US9579761A 1961-03-15 1961-03-15

Publications (1)

Publication Number Publication Date
GB959854A true GB959854A (en) 1964-06-03

Family

ID=22253626

Family Applications (1)

Application Number Title Priority Date Filing Date
GB983762A Expired GB959854A (en) 1961-03-15 1962-03-14 Demethylation of methyl-substituted aromatic hydrocarbons

Country Status (2)

Country Link
DE (1) DE1293731B (en)
GB (1) GB959854A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2169876A1 (en) * 1971-12-29 1973-09-14 Mitsubishi Petrochemical Co Catalytic steam dealkylation of alkyl aromatics - giving high purity aromatics and hydrogen
US4902845A (en) * 1982-02-04 1990-02-20 Amoco Corporation Method to extend life of iron oxide-containing catalysts using low levels of oxygen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2734929A (en) * 1956-02-14 Dealkylation of hydrocarbons
US2436923A (en) * 1946-04-08 1948-03-02 Universal Oil Prod Co Demethylation of hydrocarbons in presence of water
US2739991A (en) * 1952-07-30 1956-03-27 Universal Oil Prod Co Production of benzene
US2786876A (en) * 1952-09-16 1957-03-26 Socony Mobil Oil Co Inc Demethylation of methylbenzenes
US2773917A (en) * 1952-09-16 1956-12-11 Socony Mobil Oil Co Demethylation over chromia or molybdena catalysts
US2970954A (en) * 1958-02-14 1961-02-07 Socony Mobil Oil Co Inc Selective demethylation of hydrocarbon mixtures containing saturated and unsaturated hydrocarbons

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2169876A1 (en) * 1971-12-29 1973-09-14 Mitsubishi Petrochemical Co Catalytic steam dealkylation of alkyl aromatics - giving high purity aromatics and hydrogen
US4902845A (en) * 1982-02-04 1990-02-20 Amoco Corporation Method to extend life of iron oxide-containing catalysts using low levels of oxygen

Also Published As

Publication number Publication date
DE1293731B (en) 1969-04-30

Similar Documents

Publication Publication Date Title
ES426721A1 (en) Oxidative dehydrogenation of alcohols to aldehydes and ketones
GB959854A (en) Demethylation of methyl-substituted aromatic hydrocarbons
GB1090029A (en) Catalytic dehydrogenation of mono- or diethylbenzenes
ES440698A1 (en) Preparation of phenyl methyl carbinol
GB1249648A (en) Dehydration and methanation catalyst and process
GB960227A (en) Production of alkenyl aromatic compounds by dehydrogenation
GB994170A (en) Catalytic dehydrogenation
ES300203A1 (en) A procedure for the oxidizing catalytic oxidizing dehydrogenation of olefins (Machine-translation by Google Translate, not legally binding)
GB916114A (en) Production of olefines by catalytic dehydrogenation and catalyst therefor
GB1357920A (en) Method of dehydrogenating compounds
GB1052544A (en)
JPS5632429A (en) Production of indanone
GB828378A (en) Method for dehydrogenation of organic compounds and catalyst therefor
GB980272A (en) Production of carbinols
GB1269925A (en) Process for the dealkylation of aromatic hydrocarbons
GB959218A (en) Improvements in or relating to the production of olefinic oxides
USD192014S (en) Best available copy
FR1263947A (en) New, improved coupling without backlash or axial reaction
USD200780S (en) Line guide for fishing rods
GB695146A (en) Improvements in and relating to trifluoromethyl substituted diphenyl ethers
GB937260A (en) Process for the catalytic dealkylation of aromatic compounds
GB555000A (en) Improvements in or relating to the catalytic dehydrogenation of isopropylbenzene
ES307764A1 (en) Process for dehydrogenating hydrocarbons
GB842848A (en) The preparation of an improved dehydrogenation catalyst and a dehydrogenation process using the improved catalyst
CA608740A (en) Activated carbon catalyst radiochemical hydrocarbon conversions