GB670992A - Improvements in and relating to the isomerisation of unsaturated hydrocarbons - Google Patents

Improvements in and relating to the isomerisation of unsaturated hydrocarbons

Info

Publication number
GB670992A
GB670992A GB14451/49A GB1445149A GB670992A GB 670992 A GB670992 A GB 670992A GB 14451/49 A GB14451/49 A GB 14451/49A GB 1445149 A GB1445149 A GB 1445149A GB 670992 A GB670992 A GB 670992A
Authority
GB
United Kingdom
Prior art keywords
alumina
treated
zirconia
silica
acid
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
GB14451/49A
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.)
MORAG LAUCHLAN ALLAN
Imperial Chemical Industries Ltd
Original Assignee
MORAG LAUCHLAN ALLAN
Imperial Chemical Industries 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 MORAG LAUCHLAN ALLAN, Imperial Chemical Industries Ltd filed Critical MORAG LAUCHLAN ALLAN
Priority to GB14451/49A priority Critical patent/GB670992A/en
Publication of GB670992A publication Critical patent/GB670992A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/06—Halogens; Compounds thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
    • B01J21/04—Alumina
    • 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
    • C07C5/23—Rearrangement of carbon-to-carbon unsaturated bonds
    • 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
    • C07C2521/04—Alumina

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Catalysts (AREA)

Abstract

Allene is isomerized to methyl acetylene by contact in vapour phase at elevated temperature with a catalyst comprising: (a) silica with one or more oxides of Al, Zr, Th, Ti, Be, and B; (b) the product of treating alumina or zirconia or materials containing alumina and silica, zirconia or beryllia with silicon tetrafluoride, hydrogen fluoride, fluorine or chlorine trifluoride in the vapour phase; (c) alumina hydrogel treated with hydrofluoric acid, ammonium bifluoride, hydrofluosilicic acid, fluoboric acid or metallic fluosilicates or fluoborates other than those of alkalis and alkaline earths in the liquid phase; or (d) aluminium trifluoride or alumina with one or more fluorides of Al, Zr, Bi, Be, Zn or Cr. Preferred catalysts comprise aluminium trifluoride and alumina, alumina treated with gaseous silicon tetrafluoride, hydrogen fluoride or fluorine or alumina hydrogels treated in the liquid phase with hydrofluoric acid, ammonium bifluoride or hydrofluosilicic acid. Alumina hydrogel may be precipitated from a solution of the nitrate with ammonia, heated at 400-700 DEG C., and treated with SiF4 to a fluorine content of 3-10 per cent by weight. Substances such as silica, zirconia, thoria, and aluminium phosphate may be included. Reaction temperatures are 150-400, generally 240-300 DEG C., when space velocities are 50-200.ALSO:Catalysts for isomerizing allene comprise: (a) silica with one or more oxides of Al, Zr, Th, Ti, Be, and B; (b) the products of treating alumina or zirconia or materials containing alumina and silica, zirconia or beryllia with silicon tetrafluoride, hydrogen fluoride, fluorine or chlorine trifluoride in the vapour phase; (c) alumina hydrogel treated with hydrofluoric acid, ammonium bifluoride, hydrofluosilicic acid, fluoboric acid or metallic fluosilicates or fluoborates other than those of alkalis and alkaline earths in the liquid phase; or (d) aluminium trifluoride or alumina with one or more fluorides of Al, Zr, Bi, Be, Zn or Cr. Preferred catalysts comprise aluminium trifluoride and alumina, alumina treated with gaseous silicon tetrafluoride, hydrogen fluoride or fluorine or alumina hydrogel treated in the liquid phase with hydrofluoric acid, ammonium bifluoride or hydrofluosilicic acid. Alumina hydrogel may be precipitated from a solution of the nitrate with ammonia, heated at 400-700 DEG C, and treated with SiF4 to a fluorine content of 3-10 per cent by weight. Substances such as silica, zirconia, thoria, and aluminium phosphate may be included. Reaction temperatures are 150-400 generally 240-300 DEG C when space velocities are 50-200. In examples, precipitated hydrated alumina is treated with SiF4, NH4HF2, HF, or H2SiF6.
GB14451/49A 1949-05-30 1949-05-30 Improvements in and relating to the isomerisation of unsaturated hydrocarbons Expired GB670992A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB14451/49A GB670992A (en) 1949-05-30 1949-05-30 Improvements in and relating to the isomerisation of unsaturated hydrocarbons

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB14451/49A GB670992A (en) 1949-05-30 1949-05-30 Improvements in and relating to the isomerisation of unsaturated hydrocarbons

Publications (1)

Publication Number Publication Date
GB670992A true GB670992A (en) 1952-04-30

Family

ID=10041412

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14451/49A Expired GB670992A (en) 1949-05-30 1949-05-30 Improvements in and relating to the isomerisation of unsaturated hydrocarbons

Country Status (1)

Country Link
GB (1) GB670992A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2534459A1 (en) * 1974-08-02 1976-02-12 Snam Progetti PROCESS FOR ISOMERIZATION OF ALKENES
GB2129701A (en) * 1982-11-12 1984-05-23 Tenneco Oil Co AL2O3 alkene isomerization process and catalyst

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2534459A1 (en) * 1974-08-02 1976-02-12 Snam Progetti PROCESS FOR ISOMERIZATION OF ALKENES
GB2129701A (en) * 1982-11-12 1984-05-23 Tenneco Oil Co AL2O3 alkene isomerization process and catalyst

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