Company Filing History:
3 out of 116 
1 out of 2,354 Years Active: 2016-2018
Title: Haijun Chen: Innovator in Zeolite Technology
Introduction
Haijun Chen is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the field of zeolite technology, holding a total of four patents. His innovative work focuses on the synthesis and application of high-silica zeolites and transition-metal-containing zeolites.
Latest Patents
One of Haijun Chen's latest patents is titled "Zeolite, and production method and use therefor." This invention presents a novel high-silica zeolite characterized by a high molar ratio of a tetravalent element (Y) to a trivalent element (X) in terms of oxide. The zeolite comprises at least a trivalent element X and a tetravalent element Y, with a molar ratio of n=YO/XO in terms of oxide being 9.5 or more. It features an RHO-type structure and is produced through hydrothermal synthesis from an aqueous gel prepared by adding a mixed solution containing a crown ether, an alkali, and water to a solution containing an aluminum atom material, followed by the dropwise addition of a liquid containing a silicon atom material.
Another significant patent is for a "Transition-metal-containing zeolite." This invention describes a transition-metal-containing silicoaluminophosphate zeolite that exhibits excellent high-temperature hydrothermal durability. The method for producing this zeolite involves hydrothermal synthesis using an aqueous gel containing silicon, aluminum, phosphorus, and transition metal raw materials, along with a polyamine. The resulting zeolite demonstrates high catalytic activity and durability.
Career Highlights
Haijun Chen has worked with notable companies such as Mitsubishi Plastics, Inc. and Mitsubishi Chemical Corporation. His experience in these organizations has contributed to his expertise in zeolite technology and innovation.
Collaborations
Throughout his career, Haijun Chen has collaborated with esteemed colleagues, including Takahiko Takewaki and Takeshi Matsuo. These partnerships have further enhanced his research and development efforts in the field.
Conclusion
Haijun Chen is a distinguished inventor whose work in zeolite technology has led to significant advancements in the field. His innovative patents and collaborations reflect his commitment to enhancing the applications of zeolites in various industries.