The Industrial Phase-Transfer Catalysis Experts

PTC Tip of the Month E-Newsletter

PTC Catalyst of the Month - October 2017

Tetraphenylphosphonium Phenolate

By Marc Halpern, the leading expert in industrial phase-transfer catalysis.

Phase-transfer catalysts can be used to transfer almost any anion into almost any organic liquid. When high temperatures are required for a reaction, a thermally stable phase-transfer catalyst can be used to transfer catalytic quantities of an anionic catalyst.

Tetraphenylphosphonium phenolate was used at a level of 0.02 wt% in the preparation of polyphosphonates from bisphenol A, methylphosphonic acid diphenyl ester and a crosslinker at 250-300 deg C.

Learn how to choose phase-transfer catalysts like an expert! Now bring the excellent course “Industrial Phase-Transfer Catalysis” in-house to your company and improve process performance and R&D efficiency. Now contact Marc Halpern of PTC Organics Inc. to explore the best path forward to improve your department’s performance for hundreds of applications.


About Marc Halpern

Marc Halpern

Dr. Halpern is founder and president of PTC Organics, Inc., the only company dedicated exclusively to developing low-cost high-performance green chemistry processes for the manufacture of organic chemicals using Phase Transfer Catalysis. Dr. Halpern has innovated PTC breakthroughs for pharmaceuticals, agrochemicals, petrochemicals, monomers, polymers, flavors & fragrances, dyes & pigments and solvents. Dr. Halpern has provided PTC services on-site at more than 260 industrial process R&D departments in 37 countries and has helped chemical companies save > $200 million. Dr. Halpern co-authored five books including the best-selling “Phase-Transfer Catalysis: Fundamentals, Applications and Industrial Perspectives” and has presented the 2-day course “Practical Phase-Transfer Catalysis” at 50 locations in the US, Europe and Asia.

Dr. Halpern founded the journal “Industrial Phase-Transfer Catalysis” and “The PTC Tip of the Month” enjoyed by 2,100 qualified subscribers, now beyond 130 issues. In 2014, Dr. Halpern is celebrating his 30th year in the chemical industry, including serving as a process chemist at Dow Chemical, a supervisor of process chemistry at ICI, Director of R&D at Sybron Chemicals and founder and president of PTC Organics Inc. (15 years) and PTC Communications Inc. (20 years). Dr. Halpern also co-founded PTC Interface Inc. in 1989 and PTC Value Recovery Inc. in 1999. His academic breakthroughs include the PTC pKa Guidelines, the q-value for quat accessibility and he has achieved industrial PTC breakthroughs for a dozen strong base reactions as well as esterifications, transesterifications, epoxidations and chloromethylations plus contributed to more than 100 other industrial PTC process development projects.

Dr. Halpern has dedicated his adult life to his family and to phase-transfer catalysis (in that order!).

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