GB780338A - Para-xylene production - Google Patents

Para-xylene production

Info

Publication number
GB780338A
GB780338A GB28681/54A GB2868154A GB780338A GB 780338 A GB780338 A GB 780338A GB 28681/54 A GB28681/54 A GB 28681/54A GB 2868154 A GB2868154 A GB 2868154A GB 780338 A GB780338 A GB 780338A
Authority
GB
United Kingdom
Prior art keywords
xylene
ditolylmethane
hydrogen
para
formaldehyde
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
GB28681/54A
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.)
California Research LLC
Original Assignee
California Research LLC
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 California Research LLC filed Critical California Research LLC
Publication of GB780338A publication Critical patent/GB780338A/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
    • C07C2/862—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 oxygen as hetero-atoms
    • C07C2/867—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 oxygen as hetero-atoms the non-hydrocarbon is an aldehyde or a ketone
    • 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
    • C07C2527/02—Sulfur, selenium or tellurium; Compounds thereof
    • C07C2527/053—Sulfates or other compounds comprising the anion (SnO3n+1)2-
    • C07C2527/054—Sulfuric acid or other acids with the formula H2Sn03n+1
    • 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
    • C07C2527/08—Halides
    • C07C2527/12—Fluorides
    • C07C2527/1206—Hydrogen fluoride
    • 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
    • C07C2527/14—Phosphorus; Compounds thereof
    • C07C2527/16—Phosphorus; Compounds thereof containing oxygen
    • C07C2527/167—Phosphates or other compounds comprising the anion (PnO3n+1)(n+2)-
    • C07C2527/173—Phosphoric acid or other acids with the formula Hn+2PnO3n+1
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2531/00—Catalysts comprising hydrides, coordination complexes or organic compounds
    • C07C2531/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
    • C07C2531/025—Sulfonic acids

Landscapes

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

Abstract

Para-xylene is produced by condensing toluene with formaldehyde in the presence of a strong acid, e.g. sulphuric, methane sulphonic, phosphoric or hydrofluoric acid, and passing the so-formed ditolylmethane together with hydrogen, at 700-900 DEG F. over a preparation comprising a Group VI (b), VII (b) or VIII metal or an oxide or sulphide of such a metal, e.g. over a molybdenum oxide-alumina preparation. Mol. ratios of hydrogen to ditolylmethane may be from 1/1 to 40/1 , and the liquid hourly space velocity may be 0.2-2.5. Hydrogen pressures above 25 at. are undesirable. The product is distilled to recover toluene for reaction with more formaldehyde, to obtain a p-xylene and o-xylene mixture for fractional distillation, and to leave unconverted ditolylmethane for further hydrogenation.
GB28681/54A 1953-11-04 1954-10-05 Para-xylene production Expired GB780338A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US780338XA 1953-11-04 1953-11-04

Publications (1)

Publication Number Publication Date
GB780338A true GB780338A (en) 1957-07-31

Family

ID=22141501

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28681/54A Expired GB780338A (en) 1953-11-04 1954-10-05 Para-xylene production

Country Status (1)

Country Link
GB (1) GB780338A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4793226A (en) * 1986-03-04 1988-12-27 Willy Kress Manual device for driving screws

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4793226A (en) * 1986-03-04 1988-12-27 Willy Kress Manual device for driving screws

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