GB711793A - Continuous alkylation process - Google Patents

Continuous alkylation process

Info

Publication number
GB711793A
GB711793A GB3607/51A GB360751A GB711793A GB 711793 A GB711793 A GB 711793A GB 3607/51 A GB3607/51 A GB 3607/51A GB 360751 A GB360751 A GB 360751A GB 711793 A GB711793 A GB 711793A
Authority
GB
United Kingdom
Prior art keywords
catalyst
column
reactants
halide
liquid catalyst
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
GB3607/51A
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.)
Ruhrchemie AG
Original Assignee
Ruhrchemie AG
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 Ruhrchemie AG filed Critical Ruhrchemie AG
Publication of GB711793A publication Critical patent/GB711793A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C07C2/86—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon
    • C07C2/861—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon the non-hydrocarbon contains only halogen as hetero-atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2527/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • C07C2527/06—Halogens; Compounds thereof
    • C07C2527/125—Compounds comprising a halogen and scandium, yttrium, aluminium, gallium, indium or thallium
    • C07C2527/126—Aluminium chloride
    • 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

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

An aromatic hydrocarbon is continuously alkylated by passing with an alkyl halide upwardly through a column of liquid catalyst produced from an aluminium halide and hydrocarbons obtained from catalyst spent in the alkylation reaction, withdrawing alkylation product and liquid catalyst from the upper part of the column and recycling said catalyst, after intermittent or continuous regeneration, to the column. Mixing of reactants is effected by stirrers or baffles and by the liberated hydrogen halide which may be recycled in part to the base of the column. Reactants and fresh liquid catalyst are fed to the base of the column, product and catalyst withdrawn at the top and passed to a gravity separator where catalyst is separated for recycle, aluminium chloride, generally 1-5 per cent, by weight, is added to compensate for losses, and circulation of liquid catalyst increased so that at least 1 volume is present per volume of reactants. Small amounts of liquid catalyst are drawn off, continuously or at intervals, and replaced by fresh catalyst. Replacement of 2-5 per cent of the total every hour suffices. The drawn off catalyst is decomposed with water, and the separating oil or hydrocarbons distilled off therefrom mixed with fresh aluminium halide to form catalyst. 4-6 mols. of aromatic hydrocarbon per mol. of alkyl halide are advantageous, and conditions are correlated so that reaction is complete when reactants leave the column. In examples, spent liquid catalyst prepared from aluminium chloride and a C12-alkyl benzene is decomposed with water and the oil layer distilled to yield hydrocarbons which are mixed with an equal weight of aluminium chloride to form the catalyst. Benzene and alkyl chloride obtained by chlorinating a de-aromatized C12 petroleum fraction are reacted at 20 DEG C.
GB3607/51A 1950-02-16 1951-02-14 Continuous alkylation process Expired GB711793A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE711793X 1950-02-16

Publications (1)

Publication Number Publication Date
GB711793A true GB711793A (en) 1954-07-14

Family

ID=6621151

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3607/51A Expired GB711793A (en) 1950-02-16 1951-02-14 Continuous alkylation process

Country Status (1)

Country Link
GB (1) GB711793A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2976335A (en) * 1958-12-03 1961-03-21 Exxon Research Engineering Co Method of maintaining catalyst activity in preparation of methyl and ethyl-substituted benzenes
DE1219555B (en) * 1958-08-02 1966-06-23 Pirelli Use of an alkylation product of benzene as an impregnation oil for high-voltage oil cables
US5059736A (en) * 1989-04-25 1991-10-22 Sumitomo Chemical Co., Ltd. Process for production of sec-butylbenzene

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1219555B (en) * 1958-08-02 1966-06-23 Pirelli Use of an alkylation product of benzene as an impregnation oil for high-voltage oil cables
US2976335A (en) * 1958-12-03 1961-03-21 Exxon Research Engineering Co Method of maintaining catalyst activity in preparation of methyl and ethyl-substituted benzenes
US5059736A (en) * 1989-04-25 1991-10-22 Sumitomo Chemical Co., Ltd. Process for production of sec-butylbenzene

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