초록 ▼

Polymerization of a monomer, either alone or present in major proportion with one or more comonomers present in minor proportion, is accomplished by controlling the major monomer feed rate in response to a signal representative of the production rate of the polymerization process, unless the major m

Polymerization of a monomer, either alone or present in major proportion with one or more comonomers present in minor proportion, is accomplished by controlling the major monomer feed rate in response to a signal representative of the production rate of the polymerization process, unless the major monomer concentration within the reaction zone exceeds a preselected high limit causing the major monomer feed rate to be controlled in response to the concentration of the major monomer within the reaction zone. The flow of recycle diluent to the reaction zone is controlled in response to the concentration of major monomer within the reaction zone unless the solids concentration within the reaction zone exceeds a preselected high limit, in which case the flow of recycle diluent to the reaction zone is controlled in response to the concentration of solids within the reaction zone. Under ordinary operating conditions, when the preselected maximums have not been exceeded, the flow of major monomer to the reaction zone is controlled in response to the polymer production rate and the flow of recycle diluent to the reaction zone is controlled in response to the concentration of major monomer within the reaction zone.

대표청구항 ▼

A method for controlling a polymerization reaction, said method comprising the steps of: generating a monomer concentration signal representative of the concentration of an unpolymerized monomer within a reaction zone; controlling the flow rate of said monomer to said reacton zone in response to a p

A method for controlling a polymerization reaction, said method comprising the steps of: generating a monomer concentration signal representative of the concentration of an unpolymerized monomer within a reaction zone; controlling the flow rate of said monomer to said reacton zone in response to a preselected production rate set point signal representative of a desired rate of production of polymer within said reaction zone to provide monomer feed sufficient to maintain a preselected production rate; and automatically ceasing said step of controlling the flow rate of said monomer to said reaction zone in response to said production rate set point signal and initiating the step of controlling the flow rate of said monomer to said reaction zone in response to said monomer concentration signal to maintain monomer concentration within said reaction zone below a predetermined level, when said monomer concentration signal exceeds a predetermined value.