Location History:
- Shandong Province, CN (2006)
- Cao County, CN (2007 - 2012)
- Shanghai, CN (2011 - 2015)
Company Filing History:
6 out of 15 
2 out of 2 
1 out of 1 Years Active: 2006-2015
Title: **Innovator Spotlight: Qianwen Cheng**
Introduction
Qianwen Cheng is a prominent inventor based in Shanghai, China, recognized for his contributions in the field of organic chemistry. With a remarkable portfolio of nine patents, Cheng has made significant strides in the preparation of various chemical compounds through innovative processes.
Latest Patents
Qianwen Cheng's latest patents focus on advanced methods for synthesizing alkylated p-phenylenediamines. One of his notable inventions, titled "Process for Preparing Alkylated p-Phenylenediamines," outlines a multi-step procedure that begins with the reaction of aniline and nitrobenzene in the presence of a complex base catalyst. This reaction leads to the formation of 4-aminodiphenylamine intermediates, which are then hydrogenated to yield 4-aminodiphenylamine using a hydrogenation catalyst. The final step involves the reductive alkylation of the 4-aminodiphenylamine to produce alkylated p-phenylenediamine.
Additionally, Cheng developed the "Process for Preparing 4-Aminodiphenylamine," which refines an organic composition containing 4-aminodiphenylamine, aniline, azobenzene, and phenazine. This method entails utilizing a two-stage rectification process to separate the desired compounds, demonstrating his expertise in the refinement of organic chemicals.
Career Highlights
Throughout his career, Qianwen Cheng has held pivotal roles in several reputable companies, including Jiangsu Sinorgchem Technology Co., Ltd. and Sinorgchem Company in Shandong. His work in these organizations has contributed to the advancement of chemical processes and the development of innovative solutions in the industry.
Collaborations
Qianwen Cheng has collaborated with notable professionals, including Nongyue Wang and Xiaohui Mao, who have supported his innovative endeavors. These collaborations have fostered an environment of creativity and teamwork, further enhancing the impact of his inventions.
Conclusion
With his extensive knowledge and expertise, Qianwen Cheng has established himself as a leading inventor in the field of organic chemistry. His innovative processes and collaborative spirit continue to drive advancements in the industry, contributing to the evolution of chemical synthesis techniques and applications.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.