Otimização de uma unidade de destilação de solvente.

Abstract

The distillation is the most important separation process in chemical engineer, on the other hand it is the highest industry energy consumer. Therefore, optimized operation is essential to business feasibility. In some process happen the azeotropic moisture is formed that is hold in the distillation section, they can be classified as homogeneous or heterogeneous. This work approached the optimization of the Solvent Purification System (distillation train) from Braskem PE2 unit who is built up from to two distillation columns and one flash drum. The PE2 unit who produce High Density Polyethylene and Ultra High Molecular Weight Polyethylene by slurry process from Mitsubishi Chemical Corporation is localized in Camacari, Brazil. The polymerization is conduced in a solvent suspension and use Continuous Stirred Tank Reactor (CSTR) type. The solvent lost and the steam consumer together the 80% from the variable cost, before raw material, in High Densit y Polyethylene and Ultra High Molecular Weight Polyethylene by slurry process from Mitsubishi Chemical Corporation. The optimization from Braskem PE2 Unit distillation system, using thermodynamic model Peng Robinson through the Aspen Plus commercial simulator presented 1.200.000 R$/y.