Location History:
- Hasakimachi, JP (1987)
- Wakayama, JP (2000 - 2001)
Company Filing History:
Years Active: 1987-2001
Title: Innovations by Yuichi Irinatsu in Deinking Processes
Introduction
Yuichi Irinatsu is a notable inventor based in Wakayama, Japan. He has made significant contributions to the field of deinking processes, particularly in the recycling of wastepaper. With a total of 5 patents to his name, Irinatsu's work focuses on improving the efficiency and quality of deinking methods.
Latest Patents
One of his latest patents involves a deinking process using amine compounds and white water recycling. This innovative method ensures excellent whiteness and a high areal ratio of residual ink fines while maintaining a proper pulp yield. The process includes a flotation step that utilizes treatment water containing white water, and it is enhanced by the presence of cationic compounds, amine compounds, acid salts of amine compounds, and ampholytic compounds.
Another significant patent by Irinatsu is a wastepaper deinking method that employs amine or acid salt of amine in the flotation stage. This method liberates ink from waste paper and effectively removes it from the flotation system. It utilizes a nonionic surfactant, such as a reaction product obtained by adding an alkylene oxide to a mixture of oil and fat with alcohol. The flotation step is conducted in the presence of a cationic compound, an amine, or an amphoteric compound at a pH of 4 to 9, resulting in high-quality deinked pulp with excellent whiteness and minimal residual ink spots.
Career Highlights
Yuichi Irinatsu is currently associated with Kao Corporation, where he continues to innovate in the field of deinking processes. His work has significantly impacted the recycling industry, providing more efficient methods for producing high-quality pulp from wastepaper.
Collaborations
Irinatsu has collaborated with notable coworkers, including Yoshitaka Miyauchi and Hiromichi Takahashi, contributing to advancements in their shared field of expertise.
Conclusion
Yuichi Irinatsu's contributions to deinking processes highlight his innovative spirit and commitment to improving recycling methods. His patents reflect a deep understanding of chemical processes and their applications in wastepaper recycling.