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AssigneeMobil Oil Corporation
InventorsIraj I. Rahmim, Albin Huss, Jr., Daria N. Lissy, Donald J. Klocke, Werner O. Haag
Estimating the term…
A process is disclosed for the highly selective skeletal isomerization of linear olefin-containing organic feeds to iso-olefins at high levels of feed conversion wherein linear olefins, e.g., n-butenes, are contacted with catalyst comprising ZSM-35 under skeletal isomerization conditions which can include temperatures of 100 to 750.degree. C. The process uses a catalyst composition comprising ZSM-35, e.g., microcrystalline ZSM-35 having a crystal size whose largest dimension is no greater than 0.5 micron and whose ratio of its second largest dimension to said largest dimension ranges from 0.5 to 1. The process exhibits enhanced catalyst cycle life where the ZSM-35 is composited with a silica-containing matrix to provide a catalyst composite having a total pore volume greater than 0.6 cc/g or 300.sup.+ angstroms pore volume of greater than 0.1 cc/g.
A method for conversion of linear olefins to corresponding iso-olefins of the same carbon number which comprises contacting a linear olefin-containing organic feedstock comprising C.sub.4 to C.sub.10 linear olefins with a catalyst comprising material having the structure of ZSM-35 under skeletal isomerization conditions, wherein said conversion is carried out at temperatures between about 100.degree. and 750.degree. C., weight hourly space velocities (WHSV) based on linear olefins in said feedstock between 0.1 and 500 WHSV, and linear olefin partial pressures between 2 and 2000 kPa, and said catalyst comprises a silica binder and has a pore volume of greater than 0.66 cc/g or 300.sup.+ angstroms pore volume of greater than 0.1 cc/g.
A method for conversion of linear olefins to corresponding iso-olefins of the same carbon number which comprises contacting under skeletal isomerization conditions a linear olefin-containing organic feedstock comprising C.sub.4 to C.sub.10 linear olefins with a catalyst comprising a) material having the structure of ZSM-35 having a crystal size whose largest dimension is no greater than 0.5 micron, and whose ratio of its second largest dimension to said largest dimension ranges from 0.5 to 1.0, and b) a silica binder.
Dependencies are inferred from the claim text.