Purified Terephthalic Acid (PTA) DIAGRAM

PROCESS FLOW Purified Terephthalic Acid (PTA) DIAGRAM

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Purified Terephthalic Acid (PTA) Valve Valve Description Design Temperature Design Pressure Range Pipe Size Recommended Valve 1 Number Range deg F deg C psig bar g in dn ® C-Series T-Series G-Series 2.0 ISOLATOR iRSVP Series Watson FlexStream 1 Para-xylene 50 – 100 10 – 38 200 – 300 13.8 – 20.7 2 – 4 50 – 100 • 2 Acetic Acid 300 – 400 150 – 204 250 – 350 17.2 – 24.1 1 – 4 25 – 100 • 3 Catalyst 50 – 100 10 – 38 50 – 100 3.4 – 6.9 1 – 4 25 – 100 • 4 Air 50 – 100 10 – 38 200 – 300 13.8 – 20.7 1 – 4 25 – 100 • 5 Catalyst Mixing 50 – 100 10 – 38 50 – 100 3.4 – 6.9 1 – 4 25 – 100 • 6 Fresh Catalyst Pump 350 – 450 177 – 232 250 – 350 17.2 – 24.1 2 – 6 50 – 150 • 7 Oxidation Reactor Recirculation 350 – 450 177 – 232 250 – 350 17.2 – 24.1 2 – 6 50 – 150 • 8 Oxidation Reactor Overhead Gas 350 – 450 177 – 232 250 – 350 17.2 – 24.1 2 – 6 50 – 150 • 9 Oxidation Reactor 500 – 600 260 – 315 600 – 700 41.3 – 48.2 2 – 6 50 – 150 • 10 Crystallizer Solids 500 – 600 260 – 315 600 – 700 41.3 – 48.2 4 – 8 100 – 200 • 11 Crystallizer Overhead Gas 500 – 600 260 – 315 600 – 700 41.3 – 48.2 4 – 6 100 – 150 • 12 Crystallizer Liquids 500 – 600 260 – 315 600 – 700 41.3 – 48.2 4 – 6 100 – 150 • 13 Centrifuge I Liquids 250 – 350 121 – 177 50 – 100 3.4 – 6.9 4 – 8 100 – 200 • 14 Centrifuge I Solids 250 – 350 121 – 177 50 – 100 3.4 – 6.9 4 – 8 100 – 200 • 15 Crude Terephthalic Acid 100 – 200 38 – 93 50 – 100 3.4 – 6.9 4 – 8 100 – 200 • 16 Gas Scrubber 150 – 200 65 – 93 50 – 150 3.4 – 6.9 4 – 8 100 – 200 • 17 Centrifuge Liquids Pump 250 – 350 121 – 177 50 – 100 3.4 – 6.9 4 – 6 100 – 150 • 18 Acetic Acid Recycle 250 – 350 121 – 177 50 – 100 3.4 – 6.9 4 – 6 100 – 150 • 19 Acetic Acid Recycle 250 – 350 121 – 177 50 – 100 3.4 – 6.9 4 – 6 100 – 150 • 20 Acetic Acid Recycle 250 – 350 121 – 177 50 – 100 3.4 – 6.9 4 – 6 100 – 150 • 21 Process Water 100 – 200 38 – 93 50 – 100 3.4 – 6.9 2 – 6 50 – 150 • • 22 Process Water 100 – 200 38 – 93 50 – 100 3.4 – 6.9 2 – 6 50 – 150 • • 23 Process Water 100 – 200 38 – 93 50 – 100 3.4 – 6.9 2 – 6 50 – 150 • • 24 Process Water 100 – 200 38 – 93 50 – 100 3.4 – 6.9 2 – 6 50 – 150 • • 25 Process Water 100 – 200 38 – 93 50 – 100 3.4 – 6.9 2 – 6 50 – 150 • • 26 Process Water 100 – 200 38 – 93 50 – 100 3.4 – 6.9 2 – 6 50 – 150 • • 27 Crude TPA Scubber 100 – 200 38 – 93 50 – 100 3.4 – 6.9 4 – 8 100 – 200 • 28 Centrifuge II Solids Isolation 100 – 200 38 – 93 50 – 100 3.4 – 6.9 4 – 8 100 – 200 • 29 Crude Terephthalic Acid Secondary 100 – 200 38 – 93 50 – 100 3.4 – 6.9 4 – 8 100 – 200 Scubber • 30 Selective Hydrogennation Reactor 100 – 200 38 – 93 100 – 200 6.9 – 13.8 4 – 8 100 – 200 • 31 Filter 100 – 200 38 – 93 100 – 200 6.9 – 13.8 4 – 8 100 – 200 • 32 Finishing Crytalizer 100 – 200 38 – 93 100 – 200 6.9 – 13.8 4 – 8 100 – 200 • 33 Finishing Cetrifuge 100 – 200 38 – 93 100 – 200 6.9 – 13.8 4 – 8 100 – 200 • 34 Finishing Cetrifuge Liquids 100 – 200 38 – 93 50 – 100 3.4 – 6.9 4 – 8 100 – 200 • 35 Air 50 – 100 10 – 38 200 – 300 13.8 – 20.7 1 – 4 25 – 100 • Heat Exchanger 300 – 1000 149 – 537 200 – 600 13.8 – 41.3 1/2 – 2 13 – 50 • General Ball Valves 100 – 900 38 – 482 100 – 600 6.9 – 41.3 1 – 3 25 – 75 • 1 Recommend ISOLATOR 2.0 or T-Series if size, pressure and temperature conditions are met.

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(FROM ACETIC ACID RECOVERY) (TO CATALYST PREPARATION)

19 20 P-XYLENE (TO GAS SCRUBBING) (FROM OXIDATION)

1 8 11 CENTRIFUGE RESIDUAL GASES

WASTE WATER WATER ACETIC ACID

2 14 CRYSTAL- LIZATION

STEAM CATALYST

3 GAS SCRUBBING REMOVAL WATER ACIDIC ACID RECOVERY N2

CATALYST 6 REACTOR OXIDATION 7 10 16 MIXING TANK

5 9 13 17 (FROM (TO WATER CRYSTAL- REMOVAL) LIZATION) TO CATALYST RECOVERY AND REGENERATION AIR (TO 12 ACIDIC ACID (FROM RECOVERY) CENTRIFUGE) 4 CRUDE TEREPHTHALIC ACID ACETIC ACID RECYCLE 18 15 (TO DRYER) PROCESS WATER

24 H2 26 RESIDUAL H2 CENTRIFUGE PROCESS (FROM WATER (TO HYDRO- CRYSTALLIZATION) GENATION) 21 23 CRYSTAL- LIZATION 22 28 25 31 CENTRIFUGE

WASTE COLD AIR WATER FILTER 32 SELECTIVE HYDROGENATION

27 29 30 DRYER 33 SCRUBBER SCRUBBER PURIFIED TEREPHTHALIC ACID AIR 34 35

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