| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inside-porous zeolite which has improved stability, efficiency and/or yield and is used for structural isomerization from linear olefins into the corresponding methyl-branched isoolefins. <P>SOLUTION: A process for structurally isomerizing a linear olefin of at least 4 carbon atoms to its corresponding methyl branched isoolefin comprises contacting in a certain temperature range. a hydrocarbon feed stream containing at least one said linear olefin with an isomerizing catalyst below. The catalyst comprises: (a) mixing (i) a zeolite powder comprising at least one zeolite with at least one one-dimensional pore structure having a pore size greater than about 0.42 nm to less than about 0.7 nm, (ii) an alumina-containing binder, (iii) water, and (iv) an effective amount of an acid comprising at least one polycarboxylic acid thereby producing a mixture; (b) forming one or more particles from the mixture; and (c) calcining the particle in a certain temperature range. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
