OCT (Olefins Conversion Technology)
Summary
Olefins Conversion Technology (OCT) of Lummus was developed to produce propylene from ethylene and 2-butene, using the metathesis reaction on the proprietary catalyst with minimum investment cost. The OCT process is being regarded as a new propylene boosting technology to meet recent demand for propylene and to enhance the added value of C4 fraction.
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Features
Because the metathesis reaction does not produce propane, it is not necessary to install a P-P splitter, which is typically installed in steam crackers and FCC. It helps to lower the investment cost and reduce utility consumption in the OCT process. Because metathesis reaction is an energy neutral reaction, utility consumption is significantly reduced. The major utility requirement is limited to fuel gas for controlling reactor inlet temperature and steam and cooling water for distillation. The OCT process is an excellent process in terms of investment cost and utility consumption compared to other propylene boosting processes such as catalytic cracking.
It is possible to build the OCT process on stand alone basis. However, the overall process economics and performance is improved if the OCT process is integrated with the steam cracker or FCC plant, because the OCT process provides the ability to boost propylene production as well as operational flexibility for steam crackers and FCC. Considering the current propylene demand and price of C4 fractions, the OCT process can be considered to represent efficient utilization of C4 fractions and improve profitable opportunity for steam crackers and FCC plants.
CPT (Comonomer Production Technology)
As a new process that applies a metathesis reaction, Lummus has developed the Comonomer Production Technology (CPT) process. The process is a new technology for producing ethylene, propylene 1-butene and 1-hexene from C4/C5 olefins, and has attracted attention as a technology for effective utilization of the by-product fraction from petroleum refinery and petrochemical plants. Test operation at semi-commercial scale has been complete successfully in Tianjin, China, and the process is being released commercially for selective production of high value-added olefins.
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