TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: The method further comprises a step of adding base B followed by a second heating step between steps (b) and (c). The separation method is performed by a pressure swing adsorption process, temperature swing adsorption process or simulated moving bed process. The separation method comprises at least one hydroisomerization. Preferred Components: The hybrid solid belongs to a Bravais lattice type R, as with lattice parameters as given in the specification. The hybrid solid contains a chemical composition of structural framework of CHA type having a base pattern of formula (Zn(2-methylimidazolate(mIM))x(benzimidazolate(bIM))y), where the molar ratio of mIM/bIM ligands is 0.5-2. The hybrid solid has a specific surface of 500-1000 m2/g and a micropore volume of 0.20-0.40 cm3/g. The molar composition of the mixture obtained at the end of step (b) is 1 (precision zinc): 1-3 (mIM): 1-3 (bIM): 40-500 S. The molar composition of the mixture obtained after adding the base B is 1 (precision zinc): 1-3 (mIM): 1-3 (bIM): 0-2 B: 40-500 S.Either x+y = 2; orx, y = 0.5-1.5.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The benzimidazolate substituted on the benzene ring is 5-chlorobenzimidazolate, 5-bromobenzimidazolate or 5-methyl benzimidazolate. The feedstock contains linear paraffins, mono-branched paraffins and multi-branched paraffins having 5C and/or 6C per molecule. The multi-branched paraffins are present at 60-100 wt.% of the first stream. EXAMPLE - 2-Methylimidazole (80 mmole), 5-chlorobenzimidazole (80 mmole) and zinc nitrate hexahydrate (40 mmole) were dissolved in dimethylformamide/diethylformamide (volume ratio of 1:1) mixture (500 ml) in a Teflon (RTM: Polytetrafluoroethene) bottle (1 l). The mixture was then heated at 100 degrees C for 14 days. The product obtained was filtered and washed with dimethylformamide before being placed in a crucible and dried at 100 degrees C for 2 hours to obtain a crystalline powder of hybrid solid IM-22.