GB1044163A - Process for the production of 2,6-dimethyl-naphthalene - Google Patents

Process for the production of 2,6-dimethyl-naphthalene

Info

Publication number
GB1044163A
GB1044163A GB32910/63A GB3291063A GB1044163A GB 1044163 A GB1044163 A GB 1044163A GB 32910/63 A GB32910/63 A GB 32910/63A GB 3291063 A GB3291063 A GB 3291063A GB 1044163 A GB1044163 A GB 1044163A
Authority
GB
United Kingdom
Prior art keywords
dmn
naphthalene
dealkylation
fraction
crystals
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
GB32910/63A
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.)
Sunoco Inc
Original Assignee
Sun Oil 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 Sun Oil Co filed Critical Sun Oil Co
Publication of GB1044163A publication Critical patent/GB1044163A/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
    • C07C15/20—Polycyclic condensed hydrocarbons
    • C07C15/24—Polycyclic condensed hydrocarbons containing two rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0059—General arrangements of crystallisation plant, e.g. flow sheets
    • 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
    • C07C5/22—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by isomerisation
    • C07C5/27—Rearrangement of carbon atoms in the hydrocarbon skeleton
    • C07C5/2729—Changing the branching point of an open chain or the point of substitution on a ring
    • C07C5/2732—Catalytic processes
    • C07C5/2735—Catalytic processes with metal oxides

Landscapes

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

Abstract

Naphthalene and 2,6-dimethylnaphthalene (DMN) are obtained from a hydrodesulphurized gas oil boiling in the range 400-900 DEG F. by (1) separating a fraction boiling in the range 500-510 DEG F.; (2) crystallizing this fraction to recover a mixture of 2,6- and 2,7-DMN; (3) dealkylating at above 1000 DEG F. the filtrate from step (2) together with other fractions from step (1) and recycle material from the dealkylation to obtain naphthalene; (4) recrystallizing the mixture from step (2) to recover 2,6-DMN and a concentrate of 2,7-DMN and (5) isomerizing the latter to produce a further mixture of 2,6- and 2,7-DMN recycled to step (2) or (4). The dealkylation product is separated into naphthalene, a 500-520 DEG F. product passed to step (1) and a 450-500 DEG F. fraction recycled to the dealkylation. The mixed 2,6- and 2,7-DMN are crystallized from C3-C7 paraffin, a C1-C5 alcohol or a ketone or mixtures thereof at 0 to - 60 DEG C., the crystals partially melted by warming to 5-50 DEG C. and the crystals recrystallized from a solvent at -30 DEG to -60 DEG C. and the crystals warmed to room temperature.
GB32910/63A 1963-05-28 1963-08-20 Process for the production of 2,6-dimethyl-naphthalene Expired GB1044163A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US283772A US3249644A (en) 1963-05-28 1963-05-28 Process for the production of 2, 6-dimethylnaphthalene

Publications (1)

Publication Number Publication Date
GB1044163A true GB1044163A (en) 1966-09-28

Family

ID=23087482

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32910/63A Expired GB1044163A (en) 1963-05-28 1963-08-20 Process for the production of 2,6-dimethyl-naphthalene

Country Status (2)

Country Link
US (1) US3249644A (en)
GB (1) GB1044163A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3336411A (en) * 1964-10-09 1967-08-15 Marathon Oil Co Process for producing 2, 6-dimethylnaphthalene
US3485885A (en) * 1968-04-22 1969-12-23 Sun Oil Co Process for the purification of 2,6-dimethylnaphthalene
US3670040A (en) * 1970-03-01 1972-06-13 Sun Oil Co Fractionation of c{11 {11 {11 bicyclic aromatic hydrocarbons di or trianhydride complex formation
US3670039A (en) * 1970-05-01 1972-06-13 Sun Oil Co Fractionation of c{11 {11 {11 bicyclic aromatic hydrocarbons by tetrahalophthalic anhydride complex formation
ES2053664T3 (en) * 1987-09-24 1994-08-01 Nippon Mining Co A PROCEDURE FOR PRODUCING DIMETHYLAPHTHALENS.
US5186816A (en) * 1990-03-12 1993-02-16 Nippon Mining Co., Ltd. Method of producing high aromatic-content solvents
US6057487A (en) * 1997-12-30 2000-05-02 Chevron Chemical Company Method for producing 2,6-DMN from mixed dimethylnaphthalenes by crystallization, adsorption and isomerization

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2700638A (en) * 1950-11-06 1955-01-25 Sinclair Refining Co Combination cracking process for producing aromatics from petroleum
US2795633A (en) * 1952-09-16 1957-06-11 Socony Mobil Oil Co Inc Demethylation process
US2750432A (en) * 1952-09-16 1956-06-12 Socony Mobil Oil Co Inc Production of naphthalene
US2958643A (en) * 1956-08-29 1960-11-01 Sinclair Refining Co Two-stage catalytic conversion process for producing naphthalene and an aromatic gasoline from cycle oils
US2858348A (en) * 1957-03-12 1958-10-28 Sinclair Refining Co Process for making naphthalene
US3109036A (en) * 1961-10-12 1963-10-29 Sun Oil Co Isomerization of dimethylnaphthalenes

Also Published As

Publication number Publication date
US3249644A (en) 1966-05-03

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