Modernization of “Polimir” Process of High-Pressure Polyethylene Production at “Tomskneftekhim” Company

Abstract

Results of development of high-pressure process of low-density polyethylene production at “Tomskneftekhim” Company have been presented. New technology allowed increasing productivity, product quality, extending polymer assortment. Comparison with designed indexes and the ones at other Russian and world companies has been done.

Identification of Polymer Deposits in the High-pressure Recycling System of Low-density Polyethylene Production

“…As previously reported the revamp of the unit of low-density polyethylene (LDPE) synthesis in tubular reactors based on Polimir process and implementation of improved initiating system enabled to make 1.6 increase in output 1,2 . When making further attempts to intensify reactor block operation there was observed return ethylene temperature rise and pressure drop increase in the high pressure recycle (HPR) system with decreasing II cascade compressor capacity.…”

VLDPE Synthesis by Radical Ethylene Polymerization in Tubular Reactors–Negative Factor or Unrealized Opportunities

“…Based on the tendencies outlined it would make sense to communicate some peculiarities of LDPE production by tubular process on two Tomskneftekhim's trains Polymir -75 also celebrating the 20-aniversary of its operation this year. Process improvement history providing capacity increase up to 240 kty is detailed in paper [8], process flow diagram is given on Figure1.…”

Inquiring into Structure of Hyperbranched Polyethylene Produced in Radical Polymerization Process

“…This fact became an obstacle for the further intensification of reactor block operation for increasing total 240-250 kta output achieved [1] (with 150 design one) based on the developed conversion increase solutions. [2].…”