Belgium Environmental Protection Agency

Phillips Petroleum Company (1990) Toxicity study summary of tertiary butyl mercaptan (T0X1-6). Unpublished report to the Environmental Protection Agency, Washington, DC, USA. Submitted to WHO by the International Organization of the Flavor Industry, Bmssels, Belgium. 

The newer Flexsys patented process shown in Figure 11.21 is much more efficient than the older synthesis routes, with a 95% reduction in waste. There is no production of hydrochloric acid byproduct, and there is no need for the use of chiorinated benzene feedstocks. This process received the Environmental Protection Agency s Presidential Green Chemistry Challenge Alternative Synthetic Pathways Award, and Flexsys spent about 70 million on the construction of a new piant for this PPD2 process in Antwerp, Belgium. 

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