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Guaranteed / expected values

Process values

This parameters depends on the catalyst used, however generally they turn around the following numbers:

O-xylene concentration in reactor feed

80 – 100 gr/Nm3

High reactor yield (depends on catalyst)

up to 115 wt% of o-xylene

Efficiency on SW. C.

up to 99,8 wt% of condensable PA

Distillation residues

2-3 wt%

Overall plant Yield (wt. %)*

112 (SOR**) - 110 (EOR***)

The catalyst life time

4 to 5 years.

 * overall plant Yield → ton of product Phthalic Anhydride / tons of feed o-xylene in percentage

** start of run / fresh catalyst

*** end of run / after 4 years of operation

Product characteristic

PROPERTIES

Form

Unit

Expected Value

Guaranteed Value

Colour

Molten

Hazen

5

max. 10

Colour Stability

Molten

Hazen

30

max. 40

Melting Point

Molten

°C

131,5

min. 131,3

Colour Stability

Solid

Hazen

40

max. 60

phtalic2
B55
SWC1
phtalic6
phtalic5