GB826546A - Production of conjugated diolefins - Google Patents

Production of conjugated diolefins

Info

Publication number
GB826546A
GB826546A GB2187957A GB2187957A GB826546A GB 826546 A GB826546 A GB 826546A GB 2187957 A GB2187957 A GB 2187957A GB 2187957 A GB2187957 A GB 2187957A GB 826546 A GB826546 A GB 826546A
Authority
GB
United Kingdom
Prior art keywords
silica
formaldehyde
methylbutene
proportion
oxide
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
GB2187957A
Inventor
Wilfred John Oldham
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 GB2187957A priority Critical patent/GB826546A/en
Publication of GB826546A publication Critical patent/GB826546A/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
    • C07C2521/02—Boron or aluminium; Oxides or hydroxides thereof
    • 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
    • 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
    • C07C2521/00—Catalysts comprising the elements, oxides or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium or hafnium
    • C07C2521/12—Silica and alumina
    • 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
    • C07C2521/14—Silica and magnesia

Landscapes

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

Abstract

Conjugated diolefines are prepared by reacting acetaldehyde or formaldehyde with a monoolefine of not more than 6 carbon atoms in the vapour phase over a synthetic petroleum cracking catalyst containing 0-10% of an oxide of a Group IIa metal. The mono-olefine is preferably a tertiary olefine and may be isobutene, 2-methylbutene-2 or 2-methylbutene-1. Formaaldehyde may be introduced as industrial formalin containing 36-40% by weight of formaldehyde or as a substance which produces formaldehyde under the reaction conditions, e.g. paraformaldehyde or trioxane. The proportion of aldehyde in the reaction mixture is preferably below 10 mol. per cent and this may be achieved by using an inert diluent such as nitrogen, a lower paraffin, carbon dioxide or steam. Reaction temperatures of 150-400 DEG C. can be used with contact times of up to 5 seconds. Atmospheric pressure or just above is preferred although others can be employed. The catalyst may be, for example, silica-alumina, silica-magnesia, silica-zirconia, silica-boria or silica-titania. If an oxide of beryllium, magnesium, calcium, strontium or barium is present the proportion should be below 10%. Silicaalumina containing about 85% silica is preferred. The pore size of the silica is preferably above 30 . The catalysts may be activated by heating to above 500 DEG C. and reactivated by heating in air to burn off carbon. Fixed, moving or fluidized beds can be used.
GB2187957A 1957-07-10 1957-07-10 Production of conjugated diolefins Expired GB826546A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2187957A GB826546A (en) 1957-07-10 1957-07-10 Production of conjugated diolefins

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2187957A GB826546A (en) 1957-07-10 1957-07-10 Production of conjugated diolefins

Publications (1)

Publication Number Publication Date
GB826546A true GB826546A (en) 1960-01-13

Family

ID=10170352

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2187957A Expired GB826546A (en) 1957-07-10 1957-07-10 Production of conjugated diolefins

Country Status (1)

Country Link
GB (1) GB826546A (en)

Cited By (2)

* 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
CN116371396A (en) * 2023-04-14 2023-07-04 中国科学院长春应用化学研究所 Catalyst, preparation method thereof and isoprene synthesis method

Cited By (2)

* 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
CN116371396A (en) * 2023-04-14 2023-07-04 中国科学院长春应用化学研究所 Catalyst, preparation method thereof and isoprene synthesis method

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