Page 153 - Chemical and process design handbook

Speight_Part II_B 11/7/01 3:11 PM Page 2.94

2.94 MANUFACTURE OF CHEMICALS

Dealkylation or
disproportionation
Benzene
Light
reformate Toluene o-Xylene
m-Xylene

Extraction
Reformate
stream

Raffinate p-Xylene

Heavy C9
reformate aromatics
FIGURE 2 Separation of a BTX stream into its constituents.

Polystyrene
Ethylbenzene Styrene ABS resins
SBR elastomers

Phenol Phenolic resins
Benzene Cumene
Methacrylates
Acetone
Solvents
Adipic acid
Cyclohexane Nylon-6 and nylon-6,6
Caprolactam
Benzene
Toluene
Dinitrotoluene Toluene diisocyanate Polyurethanes

o-Xylene Phthalic anhydride
Plasticizers
Polyesters and
Xylenes m-Xylene Isophthalic acid alkyd resins

Dimethyl terephthalate Polyester
p-Xylene
Terephthalic acid fibers and films
FIGURE 3 Uses of benzene, toluene, and xylenes.