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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

 

 

         

AMS Yield, %

65

91

         

Phenol tar yield, kg

60

25-30

         

Safety level

One level, dangerous

Three-level, maximum protection

5. HA Removal

 

 

         

HA feed content to 1st Dist. Column, ppm

1500

150

         

Aldehydes Formation, ppm

400-600

less than 100

6.Phenol Treatment

 

 

         

IER life time, years

         

Zeolite life time, years

1-1.5

7

7. Phenol Tar Cracking

 

 

         

Cracker

In operation

No cracker

General Parameters:

 

 

         

Cumene Usage, kg/kg PNL

1.350 (best)

1.315

         

Phenol Quality:

 

 

         

   MO content, ppm

10-15

less than 10

         

   Total carbonyls, ppm

50

less than 30

         

   2MBF content, ppm

15-25

no more than 15

         

   Cresols, ppm

50-100

less than 50

         

   SAD

92-93

>95

 

 

 

 


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