Du Pont Introduces Freon

Article abstract: Du Pont introduced Freon as a nontoxic, nonflammable refrigerant that later was shown to harm the earth’s ozone shield.

Summary of Event

The history of mechanical refrigerators can be traced to the late eighteenth century, but the earliest devices relied on steam power and were large and cumbersome. Nevertheless, some refrigerators were used for ice-making and for industrial cooling in the nineteenth century. The source of the cooling effect was the evaporation of a volatile substance (the “refrigerant”) in a closed system. The...

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