C Richard Hsieh

Title: C Richard Hsieh: Innovator in Refinery Processes

Introduction

C Richard Hsieh is a notable inventor based in San Rafael, CA (US). He has made significant contributions to the field of chemical engineering, particularly in processes related to refining. With a total of 9 patents to his name, Hsieh has developed innovative methods that enhance the efficiency and environmental sustainability of refinery operations.

Latest Patents

One of Hsieh's latest patents is a process to remove benzene from refinery streams. This method produces a substantially benzene-free product suitable for gasoline blending. The process involves catalytically alkylating at least 30% of the benzene initially present in the stream with C2-C4 olefins to form alkylated products. The alkylation zone can be integrated into a distillation column, allowing for efficient recovery of the alkylated products. Alternatively, it can be positioned downstream, where a secondary distillation column removes heavier alkylated products. The remaining light fraction undergoes hydrogenation to convert non-alkylated benzene to cyclohexane, which is then isomerized to enhance the octane rating of C5-C7 paraffins. This innovative approach results in a gasoline blending stock that is substantially benzene-free, without negatively impacting octane numbers and increasing volume compared to the original refinery stream.

Another significant patent by Hsieh involves the alkylation of aromatics-containing refinery streams. This process aims to reduce the concentration of light aromatics, particularly benzene, by utilizing catalytic alkylation with an olefin-containing stream within a distillation column.

Career Highlights

Throughout his career, Hsieh has worked with prominent organizations, including Chevron Research Company and Chevron Research & Technology Company. His work has focused on developing processes that improve the quality and safety of petroleum products.

Collaborations

Hsieh has collaborated with notable professionals in his field, including Desmond F King and Frederick A Pettersen. These collaborations have contributed to the advancement of refinery technologies and processes.

Conclusion

C Richard Hsieh's innovative contributions to refinery processes have significantly impacted the industry. His patents reflect a commitment to enhancing efficiency and reducing environmental impact in petroleum refining. His work continues to influence the field and inspire future innovations.