CDTECH^®, supplies the ISOMPLUS skeletal isomerization technology. The ISOMPLUS skeletal isomerization process is capable of producing isobutylene or isoamylene from C₄ or C₅ streams, respectively, from either refinery or petrochemical units. A zeolite-based catalyst especially developed for this service provides near-equilibrium conversion of normal butenes to isobutylene or normal pentenes to isoamylene at high selectivity and with long process cycle times. The butene isomerate is suitable for feed to an MTBE unit; the pentene isomerate is suitable for feed to a TAME unit.

A simple process scheme and moderate process conditions result in low capital and operating costs.