|
 |
Over the 1993-2004 period, ILLA has far surpassed all the competitive technologies in terms of selectivity achieved at real industrial conditions. The above has become possible due to the breakthrough made by ILLA in the following key stages of the phenol process: cumene oxidation stage, acidic CHP cleavage stage, and stages of final product treatment from minor impurities.
The table below shows the comparison between ILLA's and best competitive technologies.
|
TECHNOLOGIES |
COMPETITORS |
ILLA |
1. Cumene Oxidation |
|
|
|
Wet Oxidation Selectivity, %molar |
|
93 |
94 |
|
Dry Oxidation Selectivity, %molar |
|
93,5 |
94.5 - 95 |
2. Off-gas Treatment |
|
|
|
Carbon life time, years |
|
Zeolite life time, years |
|
1.5-2 |
5 |
3. Cumene Stripping |
0.5% rel. CHP losses |
No CHP losses |
4. Cleavage |
|
|
|
65 |
91 |
|
60 |
25-30 |
|
One level, dangerous |
Three-level, maximum protection |
5. HA Removal |
|
|
|
HA feed content to 1st Dist. Column, ppm |
|
1500 |
150 |
|
400-600 |
less than 100 |
6.Phenol Treatment |
|
|
|
IER life time, years |
|
Zeolite life time, years |
|
1-1.5 |
7 |
7. Phenol Tar Cracking |
|
|
|
In operation |
No cracker |
General Parameters: |
|
|
|
1.350 (best) |
1.315 |
|
|
|
|
10-15 |
less than 10 |
|
50 |
less than 30 |
|
15-25 |
no more than 15 |
|
50-100 |
less than 50 |
|
92-93 |
>95 |
|
|
|
