A Green Chemistry Module Petretec Duponts Technology for

A Green Chemistry Module Petretec – Dupont’s Technology for Polyester Regeneration Presidential Green Chemistry Challenge Award

World Proven Reserves of Crude Oil 20. 6 65. 4 63. 7 44. 0 675. 7 74. 9 89. 5 thousand million barrels

World Proven Crude Oil Reserves as percent of 1296 thousand million barrel total

Composition of Crude Oil

Crude Oil Classification API Gravity = 35 o

The Uses of Crude Oil

The Xylenes

Petroleum delivered from well field Water washing to remove impurities Distillation to separate by boiling point ranges Conversion reactions to alter molecular structures Mixing to obtain maximum commercial characteristics

Petroleum Refining Distillation – separation by boiling point

Petroleum Reforming

Conversion Reactions THERMAL CRACK CATALYTIC ALKYLATION COMBINE POLYMERIZATION REFORMIING Dehydrogenation Dehydroisomerization REARRANGE Isomerization ISOMERIZATION Dehydrocyclization Hydrocracking

Catalytic Reforming – Conversion Reactions

Preparation of PET monomers Formation of ethylene glycol Formation of TA and DMT

PET Polymerization Reactions Step Growth Polymerization - Condensation Ester Interchange - Transesterification

The Dupont Petretec Process For Polyester Regeneration

Petretec Polyester Regeneration Methanolysis Reactor 260 -300 o. C 340 -650 k. Pa