GB863330A - Production of conjugated diolefines - Google Patents

Production of conjugated diolefines

Info

Publication number
GB863330A
GB863330A GB2668958A GB2668958A GB863330A GB 863330 A GB863330 A GB 863330A GB 2668958 A GB2668958 A GB 2668958A GB 2668958 A GB2668958 A GB 2668958A GB 863330 A GB863330 A GB 863330A
Authority
GB
United Kingdom
Prior art keywords
olefin
catalyst
formaldehyde
aldehyde
mols
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
GB2668958A
Inventor
Max Marin Wirth
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.)
British Hydrocarbon Chemicals Ltd
Original Assignee
British Hydrocarbon Chemicals Ltd
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 British Hydrocarbon Chemicals Ltd filed Critical British Hydrocarbon Chemicals Ltd
Priority to GB2668958A priority Critical patent/GB863330A/en
Publication of GB863330A publication Critical patent/GB863330A/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
    • C07C2521/00—Catalysts comprising the elements, oxides or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium or hafnium
    • C07C2521/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
    • C07C2521/08—Silica
    • 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

Landscapes

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

Abstract

Conjugated diolefins are prepared by reacting a C2-C6 mono-olefin with formaldehyde or acetaldehyde at elevated temperature in the vapour phase in the presence of a catalyst containing 1-20% by weight of phosphoric acid (calculated as P2O5) on an inert support. The olefin is preferably a tertiary olefin, e.g. isobutene (to form isoprene) or 2-methylbutene-1 or -2 and is used in an amount of 1-20 mols per mol of aldehyde. Formaldehyde may be supplied as formalin, the water forming an inert diluent; suitably amounts of diluent up to 95% by volume of the reaction mixture may be employed, e.g. nitrogen, carbon dioxide or lower paraffins. The reaction is effected at 100-400 DEG C. at a space velocity of 0,1-50 mols of aldehyde per litre of catalyst per hour. The acid catalyst may be supported on silica gel or kieselguhr.
GB2668958A 1958-08-19 1958-08-19 Production of conjugated diolefines Expired GB863330A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2668958A GB863330A (en) 1958-08-19 1958-08-19 Production of conjugated diolefines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2668958A GB863330A (en) 1958-08-19 1958-08-19 Production of conjugated diolefines

Publications (1)

Publication Number Publication Date
GB863330A true GB863330A (en) 1961-03-22

Family

ID=10247636

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2668958A Expired GB863330A (en) 1958-08-19 1958-08-19 Production of conjugated diolefines

Country Status (1)

Country Link
GB (1) GB863330A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0215567A1 (en) * 1985-08-07 1987-03-25 Sumitomo Chemical Company, Limited Production of 2,5-dimethyl-2,4-hexadiene

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0215567A1 (en) * 1985-08-07 1987-03-25 Sumitomo Chemical Company, Limited Production of 2,5-dimethyl-2,4-hexadiene

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