Company Filing History:
Years Active: 1998-1999
Title: Wei-Teh Wade Shang: Innovator in Purified Terephthalic Acid Production
Introduction
Wei-Teh Wade Shang is a notable inventor based in Katy, Texas, recognized for his contributions to the field of chemical engineering. He holds two patents that focus on the purification of terephthalic acid, a key component in the production of polyester resins.
Latest Patents
Shang's latest patents include a method and apparatus for preparing purified terephthalic acid. This innovative method involves purifying crude terephthalic acid from a liquid dispersion containing various impurities. The process includes filtering the dispersion to create a crude filter cake, dissolving this cake in a selective crystallization solvent at elevated temperatures, and then crystallizing the purified terephthalic acid by reducing the solution's temperature. The selective crystallization solvent used is non-aqueous, non-corrosive, and essentially non-reactive with terephthalic acid, with N-methyl pyrrolidone being the preferred solvent. This method not only enhances the purity of terephthalic acid but also does so at an economically attractive rate and with reduced operational severity, leading to lower capital investment and simplified processing.
Career Highlights
Throughout his career, Wei-Teh Wade Shang has worked with reputable companies such as Glitsch International, Inc. and HFM International, Inc. His experience in these organizations has contributed to his expertise in chemical processes and innovations.
Collaborations
Shang has collaborated with various professionals in his field, including Fu-Ming Lee, which has further enriched his work and contributions to the industry.
Conclusion
Wei-Teh Wade Shang's innovative methods for purifying terephthalic acid demonstrate his significant impact on the chemical engineering sector. His patents not only advance the technology but also provide economically viable solutions for the production of essential materials.