Production of Paraxylene - Aromatic LoopsPCH/ARO-E

Who should attend?

  • This course provides a thorough technical understanding of aromatics production and paraxylene recovery.
Audience :
  • Engineers, senior operations personnel or technical supervisory staff interested or involved in the operation, optimization and monitoring of aromatics production units.
  • Engineers from research centers and engineering companies involved in the design of these processes.

Level : Proficiency

Course Content

  • SOURCES, OUTLETS & MAIN INDUSTRIAL USES OF AROMATIC INTERMEDIATES

      • Main sources: catalytic reforming, steam cracker, coke oven gases.
      • Outlet and main uses of: benzene, toluene, ethylbenzene and xylenes.
  • AROMATICS COMPLEX SCHEMES

      • Available layouts related to downstream markets.
      • Naphtha to paraxylene typical scheme.
      • Alternate schemes.
  • AROMATICS ORIENTED CATALYTIC REFORMING

      • Technologies: semi-regenerative and regenerative (CCR).
      • Feedstocks - Yield - Severity - Products.
      • Operating parameters - Process flow diagram of a continuous catalytic reforming unit - Main equipment.
      • Reactions and catalyst - Chemical reactions: thermodynamics and kinetics.
      • Catalyst properties: role of the acidic and metallic functions.
      • Catalyst composition and selectivity, poisons and ageing factors. Catalyst regeneration.
      • Reformate splitter: Different schemes and purposes - C8 cut composition ex reformate.
  • AROMATICS - NON AROMATICS SEPARATION PROCESSES

      • Liquid-liquid extraction.
      • Extractive distillation: basic principle and applications in the petrochemical industry - Benzene Recovery Unit.
      • Advantages and drawbacks of both techniques. Available technologies.
  • SEPARATION OF AROMATICS BY CARBON NUMBER

      • Standard distillation: benzene and toluene fractionation columns, xylenes rerun column, orthoxylene splitter, heavy aromatics column.
  • AROMATICS TRANSFORMATION

      • Overview of the aromatics transformation processes: hydrodealkylation, disproportionation, transalkylation, isomerization and toluene methylation.
      • Available technologies: focus on XyMax and TransPlus technologies.
      • Case study on several aromatics production typical schemes.
  • C8 AROMATICS SEPARATION

      • Crystallization.
      • Adsorption on solid (application to xylenes separation).
  • PARAXYLENE RECOVERY UNIT

      • Principles and details of the ELUXYL process: role of equipment; adsorption technique (solid specificity, solid behavior); main operating parameters.
      • Downstream separation: extract, raffinate, paraxylene purification, solvent rerun columns.
      • Available technologies: PAREX.
  • TREATMENT OF THE PYROLYSIS GASOLINE FROM THE STEAM CRACKER

      • Standard pyrolysis gasoline composition.
      • Treatment process schemes - Aromatics upgrading. Available technologies.

Learning Objectives

  • Upon completion of the course, the participants will be able to:
  • assess the influence of operating parameters on a unit performance,
  • optimize the process for achieving the targeted yield in benzene, toluene and paraxylene,
  • detect potential deficiencies by troubleshooting in order to solve it easily.

Ways & Means

  • Applications, teamwork, case studies and interactive workshops based on typical real situations.