Tsutomu Takashima

Title: Tsutomu Takashima: Innovator in Solid Phosphoric Acid Catalysts

Introduction

Tsutomu Takashima is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the field of chemical engineering, particularly in the development of solid phosphoric acid catalysts. With a total of 2 patents, his work has advanced the efficiency of olefin dimerization reactions.

Latest Patents

Takashima's latest patents focus on solid phosphoric acid catalysts and methods for olefin dimerization. The first patent describes a solid phosphoric acid catalyst that exhibits high activity and dimer selectivity in olefin dimerization reactions. This catalyst comprises a carrier with phosphoric acid supported on it. Notably, when heated at 250°C for 20 minutes, the catalyst shows a heating loss of water of 50 mass % or more based on diphosphorus pentoxide derived from the phosphoric acid. The method involves bringing an olefin-containing feed material, which contains water in an amount of 10-1000 mass ppm, into contact with the catalyst to initiate the reaction.

The second patent also presents a solid phosphoric acid catalyst that achieves high activity and dimer selectivity in olefin dimerization reactions. This catalyst consists of phosphoric acid supported on a siliceous carrier, with the proportion of orthophosphoric acid being 60 mol % or more in terms of phosphorus atom amount. The preparation of this catalyst involves contacting a phosphoric acid aqueous solution with the siliceous carrier, followed by drying at a temperature lower than 100°C. The method for dimerization includes bringing an olefin-containing raw material into contact with the catalyst in a liquid phase, where the olefin is a monoolefin having 3 to 7 carbon atoms.

Career Highlights

Tsutomu Takashima is associated with Nippon Oil Corporation, where he has been instrumental in advancing research and development in catalysis. His innovative approaches have positioned him as a key figure in the field.

Collaborations

Takashima has collaborated with notable colleagues, including Takashi Morikita and Tatsuo Hamamatsu. Their combined expertise has contributed to the successful development of new catalytic processes.

Conclusion

Tsutomu Takashima's work in solid phosphoric acid catalysts has