David R Holmes

Title: The Innovative Contributions of David R. Holmes

Introduction

David R. Holmes is a notable inventor based in Frodsham, GB. He has made significant contributions to the field of membrane technology, holding a total of 3 patents. His work focuses on the development of advanced materials that enhance the efficiency of filtration processes.

Latest Patents

One of Holmes' latest patents is a method for the production of an asymmetric semipermeable membrane from a polymer solution. This solution contains a sulphonated polyarylethersulphone in a solvent mixture with specific properties. The solvent mixture has a delta-H in the range from 3 to 8.5, a delta-P in the range from 4 to 8, and a delta-D in the range from 7.2 to 9.5. Each component of the solvent mixture is either a liquid or a low melting solid that acts as a non-solvent or poor solvent for the sulphonated polyarylethersulphone. Additionally, at least one of the components meets certain conditions to optimize membrane performance. The resulting membranes exhibit a salt rejection of at least 99%, making them highly effective for various applications.

Career Highlights

David R. Holmes is currently employed at Imperial Chemical Industries Limited, where he continues to innovate in the field of chemical engineering. His expertise in membrane technology has positioned him as a key figure in the development of new filtration solutions.

Collaborations

Holmes has collaborated with several professionals in his field, including John W. Smith and Richard A. Hann. These partnerships have contributed to the advancement of his research and the successful implementation of his patented technologies.

Conclusion

David R. Holmes is a distinguished inventor whose work in membrane technology has led to significant advancements in filtration processes. His innovative patents and collaborations highlight his commitment to improving material efficiency and performance.