Location History:
- Waki, JP (1990 - 1991)
- Kugagun, JP (1993 - 1996)
- Kuga, JP (1996)
Company Filing History:
Years Active: 1990-1996
Title: Hirofumi Harazoe: Innovator in Polyester Manufacturing
Introduction
Hirofumi Harazoe is a notable inventor based in Waki, Japan. He has made significant contributions to the field of polyester manufacturing, holding a total of 5 patents. His innovative approaches have led to advancements in the production processes of polyesters, particularly in reducing acetaldehyde content.
Latest Patents
One of his latest patents is a process for preparing polyester. This invention outlines a method that includes a liquid phase polycondensation step, where a dicarboxylic acid, such as terephthalic acid, and a diol, like ethylene glycol, undergo a polycondensation reaction. The process is designed to produce a polyester with an intrinsic viscosity of 0.7 to 1.5 dl/g. It also includes a hot water treatment step, a drying step, and a heat treatment step, ensuring that the final polyester has an acetaldehyde content of not more than 10 ppm. This polyester is particularly suitable for use in preform and beverage bottles, as it does not alter the taste of the contents.
Another significant patent by Harazoe is a method of manufacturing polyesters. This method involves an esterifying step where a dicarboxylic acid and a dihydroxyl compound are esterified, followed by a liquid phase polycondensation step. The process includes distilling a distillate that contains a reacted dihydroxyl compound and a polycondensation catalyst, which is then subjected to purification treatment.
Career Highlights
Hirofumi Harazoe is associated with Mitsui Petrochemical Industries, Ltd., where he has been instrumental in developing innovative polyester manufacturing techniques. His work has not only advanced the technology but has also contributed to the sustainability of polyester production.
Collaborations
Throughout his career, Harazoe has collaborated with notable colleagues, including Yoshiji Ohori and Masayuki Sakai. These collaborations have fostered a creative environment that has led to significant advancements in their field.
Conclusion
Hirofumi Harazoe's contributions to polyester manufacturing highlight his innovative spirit and dedication to improving production processes. His patents reflect a commitment to quality and sustainability in the industry.