Ernest R Freitas

Title: Ernest R. Freitas and His Triazine Preparation Patent.

Introduction

Ernest R. Freitas is an inventor associated with Houston, Texas, and Shell Oil Company. His patent work includes a process for preparing a substituted s-triazine compound.

Latest Patents

Freitas is credited with 1 patent, titled “Process for Preparation of a Substituted Triazine.” The invention describes an improved method for producing 2-chloro-4-ethylamino-6-isopropylamino-s-triazine by sequentially reacting cyanuric chloride with isopropylamine and ethylamine in a mixed acetone-and-water solvent system, using an alkali metal hydroxide as an acid acceptor.

The process is designed to reduce unwanted bis(ethylamino) and bis(isopropylamino) triazine impurities. It does so by using excess cyanuric chloride in the initial substitution step, then treating the mixture with base to convert remaining cyanuric chloride into a water-soluble basic salt. The aqueous phase can then be separated, preferably before the second substitution reaction.

Career Highlights

Freitas’s listed patent reflects work on improving the preparation of a substituted triazine through reaction sequencing and impurity control. The patent identifies Shell Oil Company as the company associated with his work.

Collaborations

Freitas’s named coworkers include Thomas H. Colby and William R. Durland. Their inclusion alongside the patent record indicates a connection to the same technical and organizational context, though the supplied information does not specify their individual roles in the invention.

Conclusion

Ernest R. Freitas’s patent documents an improved approach to preparing a substituted triazine while minimizing unwanted reaction byproducts.