logo

For the Inventor, By the Inventor

Otsu, Japan

Hiroshi Ichihashi

USPTO Granted Patents = 22

Average Co-Inventor Count = 3.4

ph-index = 8

Forward Citations = 170(Granted Patents)


Location History:

  • Niihama, JA (1976 - 1977)
  • Osaka, JP (1990 - 1991)
  • Toyonaka, JP (1991)
  • Shiga, JP (1994)
  • Ohtsu, JP (1993 - 1995)
  • Niihama, JP (1981 - 2002)
  • Otsu, JP (2001 - 2005)

Company Filing History:

goldMedal22 out of 6,903 
 
Sumitomo Chemical Company, Limited
 patents

Years Active: 1976-2005

Loading Chart...
22 patents (USPTO):Explore Patents
1. 6946553 - Process for producing ε-caprolactam and catalyst for the production (2005-09-20),
2. 6531595 - Method for producing &egr;-caprolactam and reactor for the method (2003-03-11),
3. 6482945 - Process for producing epsilon-caprolactam and apparatus for the process (2002-11-19),
4. 6344586 - Process for producing adipic acid (2002-02-05),
5. 6303099 - Process for producing pentacyl-type crystalline zeolites and a process for producing &egr;-caprolactam using the same (2001-10-16),
6. 5403801 - Process for producing .epsilon.-caprolactam and activating solid (1995-04-04),
7. 5354859 - .epsilon.-caprolactam (1994-10-11),
8. 5212302 - Process for producing epsilon-caprolactam and activating solid catalysts (1993-05-18),
9. 5071802 - Regeneration of catalysts by burning in the presence of alcohols (1991-12-10),
10. 5066630 - Method for removing nitrogen-containing organic compounds from (1991-11-19),
11. 4992252 - Method for production of hydroxylammonium salt (1991-02-12),
12. 4968793 - Process for producing .epsilon.-caprolactam (1990-11-06),
13. 4665274 - Method for producing cycloolefins (1987-05-12),
14. 4575572 - Method for producing cycloolefins (1986-03-11),
15. 4565801 - Heteropoly-acids and their production and use (1986-01-21),

Title: Hiroshi Ichihashi: Innovator in Chemical Engineering

Introduction

Hiroshi Ichihashi is a prominent inventor based in Otsu, Japan, known for his substantial contributions to the field of chemical engineering. With an impressive portfolio of 22 patents, Ichihashi has made significant strides in the production of ε-caprolactam, a key chemical used in the manufacturing of nylon.

Latest Patents

Ichihashi's latest inventions include two notable patents focused on the production of ε-caprolactam. The first patent outlines a process for producing ε-caprolactam using a solid catalyst, specifically a zeolite treated with an aqueous solution containing ammonia and specific compounds. This method not only enhances catalyst activity but also prolongs its lifespan, allowing for the re-activation of solid catalysts previously used in production.

The second patent introduces a method for producing ε-caprolactam from cyclohexanone oxime, utilizing zeolites or non-zeolitic materials as catalysts under gas-phase reaction conditions. This innovative approach incorporates both a conversion step and a regeneration step, ensuring high yield and efficiency over extended periods.

Career Highlights

Hiroshi Ichihashi is currently affiliated with Sumitomo Chemical Company, Limited, where he continues to push the boundaries of chemical production methods. His work has contributed significantly to advancements in sustainable practices within the chemical industry.

Collaborations

Throughout his career, Ichihashi has collaborated with esteemed colleagues, including Shinkichi Shimizu and Tatsuo Shiraishi. These partnerships have fostered a collaborative research environment that thrives on innovation and excellence.

Conclusion

Hiroshi Ichihashi's contributions to the field of chemical engineering, particularly in the production of ε-caprolactam, exemplify the impact of innovative thinking in advancing industrial processes. His numerous patents serve as a testament to his dedication to improving the efficiency and sustainability of chemical production methods.

This text is generated by artificial intelligence and may not be accurate.
Please report any incorrect information to support@idiyas.com
Loading…