Abstract: Process and apparatus for gas-phase polymerization of olefin(s), including a fluid or stirred bed reactor, a bed level controller, and at least one conduit for withdrawing polymer, provided with an isolation valve. The conduit connects the side wall of the reactor to at least one uplift conduit, at least one recovery gas lock hopper equipped with a discharge valve, and at least one degassing chamber. At least one flushing device is provided for flushing the at least one uplift conduit.

Abstract: The present invention relates to a process and an equipment for gas-phase polymerization of olefin(s), including a fluid or stirred bed reactor, a bed level controller, and at least one conduit for withdrawing polymer, provided with an isolation valve, the said conduit connecting the side wall of the reactor to at least one uplift conduit, at least one recovery gas lock hopper equipped with a discharge valve, and at least one degassing chamber.

Abstract: A continuous or semi-continuous process for the production of triptane and/or triptene from methanol and/or dimethyl ether in the presence in a reactor of an effective concentration of catalyst active for the conversion of methanol and/or dimethyl ether to triptane and/or triptene in which process co-produced water is separated from the catalyst as a vapour phase whilst the catalyst is retained in a liquid or solid phase. Preferably, the catalyst comprises zinc halide and is maintained in said reactor in an active form and an effective concentration. Apparatus for use in the process may comprise a reactor having at least one reaction zone and at least one separation zone.