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
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
C07C5/25—Migration of carbon-to-carbon double bonds
C07C5/2506—Catalytic processes
C07C5/2525—Catalytic processes with inorganic acids; with salts or anhydrides of acids
C07C5/2543—Acids of halogen; Salts thereof
C07C5/255—Metal halides; Complexes thereof with organic compounds