Ineos Europe Ag

Guillaume Lajus

Leslie William Bolton

Andrew David Bell

Rupert Parkinson

Method for switching between steady-state and non-steady-state operations of a process for the production of a polymer by polymerization of a monomer in the presence of a comonomer and/or hydrogen. The process includes (a1) at non-steady-state controlling the process based on the ratio of comonomer to monomer in the reactor, and (b1) at steady-state controlling the process based on the flow ratio of comonomer to monomer to the reactor, and/or (a2) at non-steady-state controlling the process based on the ratio of hydrogen to monomer in the reactor, and (b2) at steady-state controlling the process based on the flow ratio of hydrogen to monomer to the reactor.

Method for production of polymer

Process for the polymerization of olefins in a gas phase fluidized bed reactor, by i) passing a fluidizing gas to the reactor to fluidize a bed of polymer particles therein, ii) withdrawing the fluidizing gas from the reactor, iii) cooling all or a portion of the fluidizing gas withdrawn from the reactor to a temperature at which a portion of the components of the fluidizing gas condense to form condensed liquid, and iv) passing condensed liquid and non-condensed components of the fluidizing gas back to the reactor. A reservoir of condensed liquid downstream of the cooling step is provided, and variations in the inventory of the condensed liquid are made in order to control the temperature in the reactor.

Growing community of inventors

Martigues, France

Guillaume Lajus