Paraxylene plant design with process selectivity disproponasi toulene with a capacity of 300,000 tonnes / yearBy Delta Mutiara d500122006

Benzene is widely used in the industry as:Solvent in the extraction and distillation operations purposesRaw materials for manufacture of other organic chemical compounds or intermediate of products - commercial products,

for example: styrene, cumene cyclohexane, alkyl benzene, detergent alkylate, nitrobenzene, and chlorobenzene.

paraxyleneParaxylene plant in Indonesia only refinery paraxylene Pertamina UP IV Cilacap which have production with a capacity of 270,000 tonnes / year and began operations in 1990

Toulene and hydrogenToulene Import fromPetrochemical Corp of Singapore, China Petroleum Inc, Amoco Chemicals Corp di Thailand

While , hydrogen is supplied from PT ALIndo (Air Liquid Indonesia) in merak banten

CapacityEsfahan Petrochemical Company : 44,000 tonnes / year China Petroleum Inc. : 500,000 tonnes / year. Pertamina UP IV Cilacap:270,000 tonnes / year

so , capacity this plant is 300,000 tonnes/year to meet the needs of the domestic and the remainder in export

Location In Merak, Banten

LAY OUT PLANT AND EQUIPMENT

Caption:1. Postal Security2. Parks3. Parking Area4. Office and Hall5. Diner6. Polyclinic7. Mushola8. libraries9. Storage reactants10. The storage of the product11. The process Area12. The area expansion process13. Control room14. Laboratory15. Warehouse16. Workshop17. Local power generation18. Firefighters19. Regional utilities20. Regional waste treatment21. Regional supply of fuel

LAYOUT EQUIPMENTCaptionToulene tankVaporizerFurnaceReactorFlash drumDistilation tower 1Reboiler 1Condenser 1Distilation tower 2Reboiler 2Condenser 2CrystalizerCentrifugeMelterParaxylene tank

Disproporsionasi Toluene2 moles of toluene diffuse into the surface of the catalyst through the pores, diffusion can be run quickly. Toluene compound which loses methyl groups will be benzene and toluene compound else will receive metylnya groups formed mixed xylenes (ortho, meta and para-xylene)

Benzene is formed from the reaction of toluene disproportionation can quickly leave the surface of the catalyst, followed by paraxylene that is formed while the o-xylene and m-xylene longer residence time in the catalyst (difusivitasnya lower than the diffusivity of p-xylene) and will undergo further reaction into p-xylene isomerization before they leave the surface of the catalyst with a slow diffusion movement.

Toluene disproposionasi process theoretically occurring mixture is equimolar: 50% benzene and 50% xylene. But in fact obtained from the reaction is 37% benzene and 55% xylene (Mc Ketta, p 257)(zeolite ZSM-5) in order to obtain a high concentration of paraxylene in the mix

Thermodynamic review

PROCESS DIAGRAM