Selected Industrial Processes with PTC

There are hundreds of commercial applications of phase-transfer catalysis and they were commercialized due to the competitive advantages which they truly provide. Following is only a selection of industrial processes using PTC. 

Continuous Dehydrohalogenation to Produce the Large Scale Monomer 

Dehydrohalogenation of 3,4-dichloro-l-butene with NaOH and the PTC cocoalkyl benzyl bis [P-hydroxypropyl]anunonium chloride can be carried out in a reactor cascade of 3 8 stirred vessels (Eq. 12-1)  

There can be achieved productivity 16 t/hr, yield up to 99.2% and NaOH usage only 0.8 mole % excess. 

This process allows an outstanding reduction of excess hazardous high volume raw material such as phosgene (Eq. 12-2)  

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