Projektierungskurs

Faculty of engineering

Projektierungskurs
WS 2015/16

29. March C 15. April 2016

 

Recycling routes for Triphenylphosphine (TPP)

 

Partner:
Koninklijke DSM N.V.

Coordination:
Dr. Marco Haumann


2016

Flowchart

 

Main flowchart

 

 The flowchart illustrates the whole process for both routes. Starting in the right upper corner at TPPO and continuing with the left path downside, route 1 is shown. The path on the right side shows route 2. The figure elucidates that route 1 recycles TPPO in a multi-step process, whereas route 2 is a single-step process.

 

 

Reactions of Route 1

Textfeld: 5 bar, 215C

 

Textfeld: 100 bar, 180Cuntitled 

 

These figures show the main reactions of route 1. In the first reaction TPPO is transformed into SCP with the help of Phosgene (COCl2) at a pressure of 5 bar and 215 C. The resulting DCP of reaction 1 and H2 are transformed into TPP in a second reaction at a pressure of 100 bar and a temperature of 180 C.

 

 

 

Reactions of Route 2


These figures show the main reactions of route

2. The first reaction is the catalytic reduction of TPPO to TPP with the catalysor Bi2O5. The second reaction is the regeneration of the catalysor. Both reactions take place at 500 C, resulting in special requirements for the used equipment.

 

 

Basic blockdiagramm of route 1

 

The blockdiagramm shows the realization of route 1 in a more detailed way. The single steps and the entering and outgoing reactants are shown.

 

 

Basic blockdiagramm of route 2 fixed-bed reactor

The blockdiagramm shows the realization of route 2 in a more detailed way. Route 2 uses two different reactors. The blockdiagramm illustrates, how route 2 can be realized with a fixed-bed reactor. Furthermore, the single steps and the entering and outgoing reactants are shown.

 

 

Flowchart route 2 riser-downer reactor

The blockdiagramm shows the realization of route 2 in a more detailed way. Route 2 uses two different reactors. The blockdiagramm illustrates, how route 2 can be realized with a riser-downer reactor. Furthermore, the single steps and the entering and outgoing reactants are shown.

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