GB859079A - A process for the thermal dealkylation of aromatic compounds - Google Patents

A process for the thermal dealkylation of aromatic compounds

Info

Publication number
GB859079A
GB859079A GB36753/59A GB3675359A GB859079A GB 859079 A GB859079 A GB 859079A GB 36753/59 A GB36753/59 A GB 36753/59A GB 3675359 A GB3675359 A GB 3675359A GB 859079 A GB859079 A GB 859079A
Authority
GB
United Kingdom
Prior art keywords
dealkylation
product
carbon dioxide
gas
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.)
Expired
Application number
GB36753/59A
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Publication of GB859079A publication Critical patent/GB859079A/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
    • C07C4/16—Thermal processes
    • 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
    • Y02P20/582—Recycling of unreacted starting or intermediate materials

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (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)

Abstract

In the thermal dealkylation of aromatic compounds in the presence of a hydrogen-containing dealkylation gas, a gas mixture containing hydrogen and methane is separated from the product, subjected to partial combustion with oxygen and the product used as dealkylation gas. Usually a bleed stream is removed from the gas before the partial combustion, carbon dioxide may be removed by washing and carbon monoxide reacted with steam to give hydrogen and carbon dioxide. In a preferred embodiment the separated product gas after removal of a bleed stream is washed to remove carbon dioxide and separated into two streams. The first is subjected to partial combustion, if desired in two parallel reactors. Part of the hot product if a single reactor is used or the whole product from one of a pair of reactors is mixed with the second stream to heat it and the mixture is mixed with steam and reacted to give hydrogen and carbon dioxide. The resultant mixture is washed to remove steam and carbon dioxide and mixed with the remain partial combustion products to reheat it for use in the dealkylation. The starting material may be a single compound or mixtures such as petroleum hydrocarbons. The hydrogen to hydrocarbon mol ratio may be between 1 and 20 and the reaction is effected at 500-1000 DEG C. and 5-35 atmospheres gauge in an empty space or in the presence of inert particles. The dealkylation may be partial or complete and insufficiently dealkylated product may be recycled. Partial combustion is effected at about the same pressure for convenience and a suitable process is described in Specification 780,120.
GB36753/59A 1958-10-31 1959-10-29 A process for the thermal dealkylation of aromatic compounds Expired GB859079A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL859079X 1958-10-31

Publications (1)

Publication Number Publication Date
GB859079A true GB859079A (en) 1961-01-18

Family

ID=19847350

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36753/59A Expired GB859079A (en) 1958-10-31 1959-10-29 A process for the thermal dealkylation of aromatic compounds

Country Status (1)

Country Link
GB (1) GB859079A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3288873A (en) * 1963-06-27 1966-11-29 Mobil Oil Corp Thermal hydrodealkylation of naphthalene precursors
US3442793A (en) * 1966-12-30 1969-05-06 Universal Oil Prod Co Method for hydrocarbon conversion
DE1793449C2 (en) * 1967-09-20 1974-05-09 Sir Soc Italiana Resine Spa Process for the production of benzene, methane and ethane from hydrocarbon mixtures containing diisopropylbenzenes
EP1950271A1 (en) * 2007-01-26 2008-07-30 Linde Aktiengesellschaft Method for separating the gaseous reaction products of steam dealkylation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3288873A (en) * 1963-06-27 1966-11-29 Mobil Oil Corp Thermal hydrodealkylation of naphthalene precursors
US3442793A (en) * 1966-12-30 1969-05-06 Universal Oil Prod Co Method for hydrocarbon conversion
DE1793449C2 (en) * 1967-09-20 1974-05-09 Sir Soc Italiana Resine Spa Process for the production of benzene, methane and ethane from hydrocarbon mixtures containing diisopropylbenzenes
EP1950271A1 (en) * 2007-01-26 2008-07-30 Linde Aktiengesellschaft Method for separating the gaseous reaction products of steam dealkylation

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