Alan J Dennis

Title: Alan J Dennis: Innovator in Chemical Processes

Introduction

Alan J Dennis is a notable inventor located in Middlesbrough, GB, whose contributions to the field of chemical engineering are recognized through his possession of 16 patents. His innovative spirit and dedication to the advancement of chemical processes have made a significant impact in the industry.

Latest Patents

Among his latest innovations, Alan has developed a groundbreaking aldolisation-dehydration process, particularly aimed at the continuous production of diaryl carbonates. This process involves the transesterification of a dialkyl carbonate, such as dimethyl carbonate, with an aromatic hydroxy compound, like phenol, across three successive reaction zones. A transesterification catalyst, such as a titanate ester or a mixture of esters, is employed in each zone to optimize the formation of alkyl aryl carbonate initially, while promoting conversion to diaryl carbonate in the final zone. The resulting vaporous mixture from the earlier stages is a combination of alkyl alcohol, dialkyl carbonate, alkyl aryl carbonate, and aromatic hydroxy compounds. This mixture undergoes separation in an alkyl alcohol recovery zone via distillation in dedicated columns. Notably, the second distillation column can function at a lower pressure, utilizing the heat from the vaporization of the mixture as the reboiler's heat source for efficient recovery.

Career Highlights

Alan's career is marked by his valuable contributions while working at esteemed companies such as Davy McKee and Davy McKee Oil & Chemicals Limited. His expertise in chemical processes has led to the development of innovative solutions that cater to industry needs.

Collaborations

Throughout his career, Alan has collaborated with notable colleagues, including George E Harrison and Norman Harris. These partnerships have contributed to his ability to push the boundaries of innovation and advance new chemical methodologies.

Conclusion

In conclusion, Alan J Dennis stands out as an accomplished inventor in the realm of chemical processes. His rich portfolio of patents, including the recent advancements in the production of diaryl carbonates, exemplifies his commitment to innovation. Through his career and collaborations, he continues to pave the way for future developments in the field.