Disclosed is a process for the conversion of acyclic C.sub.5 feedstock to a product comprising cyclic C.sub.5 compounds, such as, for example, cyclopentadiene, and catalyst compositions for use in such process. The process comprises the steps of contacting said feedstock and, optionally, hydrogen under acyclic C.sub.5 conversion conditions in the presence of a catalyst composition to form said product. The catalyst composition comprising a microporous crystalline aluminosilicate having a constraint index in the range of 3 to 12, a Group 10 metal, and, optionally, a Group 11 metal, in combination with a Group 1 alkali metal and/or a Group 2 alkaline earth metal.

Disclosed is a process for the conversion of acyclic C.sub.5 feedstock to a product comprising cyclic C.sub.5 compounds, such as, for example, cyclopentadiene, and catalyst compositions for use in such process. The process comprises the steps of contacting said feedstock and, optionally, hydrogen under acyclic C.sub.5 conversion conditions in the presence of a catalyst composition to form said product. The catalyst composition comprising a microporous crystalline aluminosilicate having a constraint index in the range of 3 to 12, a Group 10 metal, and, optionally, a Group 11 metal, in combination with a Group 1 alkali metal and/or a Group 2 alkaline earth metal.

Disclosed is a process for the conversion of acyclic C.sub.5 feedstock to a product comprising cyclic C.sub.5 compounds, such as for example, cyclopentadiene, and catalyst compositions for use in such process. The process comprising the steps of contacting said feedstock and, optionally, hydrogen under acyclic C.sub.5 conversion conditions in the presence of a catalyst composition to form said product. The catalyst composition comprising a microporous crystalline ferrosilicate, a Group 10 metal, and, optionally, a Group 11 metal, in combination with an optional Group 1 alkali metal and/or an optional Group 2 alkaline earth metal.

Disclosed is a process for the conversion of acyclic C.sub.5 feedstock to a product comprising cyclic C.sub.5 compounds, such as for example, cyclopentadiene, and catalyst compositions for use in such process. The process comprising the steps of contacting said feedstock and, optionally, hydrogen under acyclic C.sub.5 conversion conditions in the presence of a catalyst composition to form said product. The catalyst composition comprising a microporous crystalline ferrosilicate, a Group 10 metal, and, optionally, a Group 11 metal, in combination with an optional Group 1 alkali metal and/or an optional Group 2 alkaline earth metal.

The present invention is related to the isomerization process in which a light naphtha stream comprising of paraffinic (mono and single branched), naphthenic and aromatic hydrocarbons in the range of C.sub.5-C.sub.7 is contacted with the solid catalyst in multiple reaction zones and in presence of hydrogen to produce high octane gasoline predominantly comprising of paraffins (single and di-branched) and naphthenes. The process scheme comprises of more than one isomerization reaction section operating at different temperatures and other operating conditions. The catalyst employed in these reaction sections is a high coordination sulfated mixed metal oxide catalyst which contains at least one noble metal and sulfated zirconia in addition to the other components. The process of the present invention also comprises more than one fractionation section and recycling of a particular stream to the reaction zone for improving the isomerization of light naphtha.

The present invention is related to the isomerization process in which a light naphtha stream comprising of paraffinic (mono and single branched), naphthenic and aromatic hydrocarbons in the range of C.sub.5-C.sub.7 is contacted with the solid catalyst in multiple reaction zones and in presence of hydrogen to produce high octane gasoline predominantly comprising of paraffins (single and di-branched) and naphthenes. The process scheme comprises of more than one isomerization reaction section operating at different temperatures and other operating conditions. The catalyst employed in these reaction sections is a high coordination sulfated mixed metal oxide catalyst which contains at least one noble metal and sulfated zirconia in addition to the other components. The process of the present invention also comprises more than one fractionation section and recycling of a particular stream to the reaction zone for improving the isomerization of light naphtha.